Hitachi Metals Co., Ltd., Hitachi Metals Co., Ltd., is the manufacturer of Hitachi Tool Steel in Japan. It was established in 1956 (Showa 31), and the five factories to be processed include Tobata and Fukagawa. Kuwana, Wakamatsu, and Yasugi.
Hitachi Metals Co., Ltd.'s Anlai plant has a long history of more than one hundred years. The former factory of Yasugiwa Co., Ltd. was an Anlai steelworks company. It started in the Yunbo Tiegang joint-venture company established in 1899. In 1915, it expanded and developed into a manufacturing high-speed steel and high-grade specialty. Steel's professional workshops, through careful selection of various types of raw materials, adhering to traditional steelmaking technology, continue to innovate and professionally manufacture high quality die steel.
Hitachi Tool Steel's market share in Japan ranks first, and it is highly rated in the international market, thanks to Hitachi Matals' strong steel development capability and quality assurance system and experienced technology. service system.
Hitachi Matals' original ISOTROPY tool steel can reduce the difference in the longitudinal direction (calendar direction) and transverse mechanical properties of steels. It has isotropic characteristics. This technical idea is welcomed by users from all walks of life. The high degree of evaluation has been widely applied to all Hitachi Steel, and has made a great contribution to the stability and longevity of Hitachi Tool Steel.
The products of Hitachi Metals Co., Ltd. developed so far cover electronics, automotive, machinery, construction, and environmental fields such as IT parts and materials, magnetic application parts, flat panel displays, computers and semiconductor integrated circuit devices, automotive parts and materials, and environmental protection. System products, aerospace and nuclear power industrial materials, etc.
Hitachi Metals' mold steel includes:
1.YSS Cold Work Tool Steel:
(1) YCS3: JIS SKS93, specialty: a small amount of carbon tool steel for production; uses: stamping dies, jigs, tools, etc.
(2) SGT: JIS SKS3, specialty: General purpose cold work die steel with excellent machinability, to pay more attention to the quenching and electromachining of large parts; Uses: Dies and gauges for sheet metal, etc.
(3) HMD5 (medium C-Cr-Mo flame-hardened steel SKS grade), HMD1 (medium C-Cr-Mo-V flame-hardened steel SKD grade): all patented steel grades, specialty: flame-hardened steel, air-cooled, high hardness, Small deformation, good welding performance; Uses: sheet metal molds.
(4) ACD37: Features: Air-cooled, vacuum-hardened steel, with SGT quenchability, can improve the line cutting processability; Uses: sheet metal molds, gauges and so on.
(5) SLD: JIS SKD11, Corresponds to Cr12MoV, Features: High wear resistance universal cold work die steel, excellent quenchability, and quenching deformation, SLD performance is superior to other SKD11 die steel; Uses: General cold work die , forming rolls, shears and so on.
(6) ARK1 (C-Cr-Mo-V matrix cold work die steel): Patented steel, special features: high toughness, good machinability, good quenchability, quenching deformation of a model of cold working steel; Uses: sheet metal Die, printer motherboard mold, mechanical tools and so on.
(7) SLD8 (C-Cr-Mo-V high temperature tempered cold work die steel): Patented steel grades, specialty: Improved tool steel for cold working at high temperature tempering, hardness up to HRC62, excellent machinability, resistance Grinding and toughness; Uses: Reeling, cold forging die, shearing blade, high wear-resistant plastic die, etc.
(8) CRD: JIS SKD1, specialty: cold work die steel with the most superior wear resistance; use: drawing die, mass production of blanking die, liners and so on.
(9) HPM1: Patented steel grade, special feature: HRC40 free-cutting pre-hardened steel, good nitriding properties; use: a small number of production stamping die, fixtures, tools and so on.
(10) YXM1: JIS SKH51 is a universal high-speed steel with a wide range of uses. It has extremely high wear resistance and good toughness. In recent years, with the application of Hitachi Metal's ISOTROPY (isotropic) manufacturing process, the performance of YXM1 With a substantial increase, become the leader of similar products. Features: High-speed steel with high wear resistance and good toughness, high hardness, high strength, and good toughness at the same time; Uses: cold forging die, upsetting tool, longitudinal shearing machine, etc.
(11) YXM4 (JIS SKH55), XVC5 (JIS SKH57): Specialty: High-speed steel for wear resistance, sintering resistance, and high pressure resistance; Application: Cold forging dies, drawing dies, etc.
(12) YXR7 (High-strength model high-speed steel with high C-Mo-V): Patented steel, special feature: 62~65HRC, high-tensile steel with high toughness, vacuum quenching; uses: coil rolling, cold forging roll, cold forging Punch, blanking punch, etc.
(13) YXR3 (C-Mo-V Model High Speed ​​Steel): A patented steel grade, a new generation of high-speed steel refined by Hitachi Metals for many years, which is mainly aimed at greatly improving the toughness of conventional high-speed steels. It is a material that combines the strength of high speed steel with the toughness of hot die steel. Features: 58~61HRC, highest toughness, general purpose model high speed steel, vacuum quenching; uses: to avoid cracks, gaps and other molds.
(14) YXR33 (Low-C-Mo-V Model High Speed ​​Steel): Patented steel grade, specialty: High-speed steel with the highest toughness in high-speed steel, using a hardness of 56~58HRC; Use: Cold forging die, medium temperature die forging die, etc.
(15) HAP5R: powder high-speed steel, specialties: C-Mo-V high-toughness powder high-speed steel; uses: cold forging die, forging die and so on.
(16) HAP10: Powder high-speed steel, specialty: High-tenacity powder high-speed steel; Uses: precision stamping die, etc.
(17) HAP40: Powder high-speed steel, specialty: Universal powder high-speed steel with both wear resistance and toughness; Uses: Stamping dies, rolls, etc. for mass production.
(18) HAP72: Powder high-speed steel, specialty: High-speed steel with high hardness and highest wear resistance; Application: High-performance IC model for long-life cold plastic processing.
(19) SLD-MAGIC: It is a new generation mold steel with high service life and easy processing. It has the following characteristics: 1 Compared with SLD8 steel (80% Cr steel for SKD11), its wear resistance can be increased at 62HRC. %;2 Machinability is improved by 35% compared with SLD8; 3 Toughness is equivalent to SLD8 and improved over SKD11; 4 Heat treatment deformation ratio is reduced by about 40% compared to SLD8, shape error is improved; 5 Surface treatment performance is improved, TD, CVD is performed After the treatment, the bondability of the treated layer was increased by 30%. 6 The above 8% Cr and 10% Cr steels had reduced amounts of carbides. Although the machinability was improved, the wear resistance and seizure resistance were worse than that of SKD11. The wear resistance and seizure resistance of SLD-MAGIC is comparable to that of SKD11, while the toughness is increased, so that the life of the die will be greatly increased; 7 the size change after use is small, equivalent to SKD11, and after low-temperature tempering or cold treatment, stable after heat treatment After the treatment, the size change is smaller. 8 Due to the control of the carbide morphology, SLD-MAGIC has higher fatigue strength than SKD11. The annealing hardness of SLD-MAGIC is ≤ 255 HB. Quenching heating temperature 1010 ~ 1040 °C, the implementation of air-cooled quenching, quenching hardness up to 64HRC; tempering temperature: low temperature tempering at 150 ~ 250 °C, and then air-cooled, or at 480 ~ 530 °C, and then air-cooled to obtain ≥ 58HRC hardness Note that at this time, the hardness peak occurs at 500°C tempering, which generally reaches 60 to 62 HRC.
2. YSS hot-working tool steel (1) DAC: JIS SKD61, the most widely used in the aluminum-zinc die-casting mold, is a kind of hot die steel with good toughness and heat resistance balance, and its performance is extremely stable.
(2) DBC: JIS SKD62, general-purpose hot die steel used in hot stamping, etc.
(3) DAC3: Patented steel grade, 5Cr series high toughness hot die steel, superior toughness than DAC, suitable for high hardness extrusion die and hot stamping die to prevent cracks.
(4) DAC10: Patented steel grade, 5Cr series high-strength hot die steel, heat-resistant crack resistance and excellent wear resistance of hot die steel, suitable for precision die-casting molds and hot stamping die.
(5) DAC40: Patented steel grade, hot die steel for high-strength Al extrusion dies, superior to DAC for high temperature strength, suitable for softening Al extrusion dies and hot stamping dies.
(6) YEM: JIS SKD7, HATEBUR TYPE die and other strong hot and cold forging model steel.
(7) YEM-K: Patented steel grade, 3Cr series high-strength hot die steel, improved the high temperature strength and toughness of YEM hot die steel.
(8) HDC (JIS SKD5), YDC (JIS SKD4), MDC (JIS SKD8): W-containing high-strength hot die steels.
(9) MDC-K: Patented steel grade, high strength hot die steel with improved MDC toughness.
(10) DAC45: Patented steel grade, high-strength die-casting die steel, high-temperature strength, excellent crack resistance, suitable for hot stamping dies requiring wear resistance and high Si-Al die-casting dies requiring corrosion resistance.
(11) DM: JIS SKT4, steel for prehardened forging die.
(12) YHD28: Patented steel grade, high-toughness hot stamping die steel, large-size hot stamping die steel with excellent wear resistance and toughness, pre-hardened.
(13) YHD3: Patented steel, precipitation hardening hot stamping model steel, pre-hardened.
(14) FDAC: JIS SKD61 pre-hardened, easy-cut hot die steel.
(15) DAC55: DAC is the most widely used material for A1, Zn die casting, and has excellent strength, toughness, and heat resistance of hot work mold materials. In recent years, it has developed toward high toughness and isotropy. DAC55 is a high-performance die-casting mold steel, with a longer service life and high hardenability, heat-resistant fatigue and high toughness 5% Cr series of hot die steel for medium and large molds. Features: 1 excellent thermal cracking resistance; 2 can be used in the high hardness of 50~53HRC; 3 excellent crack resistance; 4 high high temperature strength; 5 high hardenability. Applications: Medium and large die casting molds, precision die casting molds and extrusion die casting molds. Heat treatment conditions: quenching heating temperature 1010 ~ 1030 °C, quenching; tempering temperature 550 ~ 640 °C; use of hardness: 43 ~ 53HRC. When the quenching at 1020 °C occurs in the range of 550 °C ~ 500 °C secondary hardening peak, breaking up to 53HRC. The recommended hardness of the mold: when the heat-resistant crack is the main (such as small pieces, extrusion mold) using 50 ~ 53HRC; under the general conditions of 46 ~ 50HRC; when the toughness is the main, then choose 43 ~ 46HRC more appropriate .
3.YSS plastic mold steel
(1) HPM7: Improved P20, suitable for molds requiring high weldability and machinability.
(2) HPM2: P20 modified, fast cutting type, suitable for opaque molding molds, daily-use molds.
(3) HPM77: SUS420J2 improved, fast cutting type, suitable for corrosion resistant molds, rubber molds and so on.
(4) PSL: SUS630 improved, suitable for pvc, foamed resin rubber products, etc.
(5) CENA1: A new type of plastic die steel containing Cr and Ni precipitation-hardening steel, which has corrosion resistance and easy machinability, has excellent polishing properties, etching patterns, and discharge processing characteristics, and is most suitable for the improvement of molds that produce seam lines. In the past, it has been widely used in high-bright highlighting molds.
(6) HPM1: P21 modified, fast cutting type, suitable for the manufacture of a variety of home appliances mold.
(7) HPM50: Improved P21, suitable for molds that require high specularity, erodability, and electrical dischargeability.
(8) HPM38: SUS420J2 improved, 13Cr series containing Mo stainless steel, made of special smelting, the most suitable for the high hardness, corrosion resistance and high processing of the plastic mold; HPM38 features are: 1 excellent mirror processing; 2 to SUS 420 J2 has better corrosion resistance, can be used without chrome plating; 3 heat treatment deformation is very small, suitable for precision mold; 4 is available under pre-hardened state (29~33HRC) and can be used directly. The use occasions are: 1 general molds for transparent products, such as lenses, cosmetics shell; 2 resin molds with added flame retardant, such as home appliances, office supplies, molds for communication devices; 3 can not be chrome-plated molds, such as food containers and medical The mold of the device. HPM38 heat treatment conditions: quenching heating temperature 1000 ~ 1050 °C, air cooling; tempering temperature 200 ~ 500 °C, air cooling; hardness up to 50 ~ 55HRC. It has a yield strength of 1618 MPa, a tensile strength of 1912 MPa, an elongation of 13%, and a shrinkage of 35% at 52 HRC.
(9)HPM38S: SUS420J2 is improved. Its cleanliness is higher than that of HPM38. It can be applied to molds with a surface roughness of less than 0.01μm. For example, it is used for the manufacture of optical discs and aspherical lenses. Its hardness is 50~55HRC.
(10) HPM31: SKD11 improved hardness of 56 ~ 60HRC, wear-resistant, suitable for engineering resin molds.
(11) ZCD-M: SKD11 modified, hardness 60 ~ 63HRC, suitable for IC die.
(12) ZDP282: SUS440C improved powder tool steel, hardness 60 ~ 63HRC good corrosion resistance, suitable for engineering resin molds and optical disc molds.
(13) ZDP4: High-alloy powder steel with a hardness of 60 to 65 HRC. Excellent wear resistance and corrosion resistance. Suitable for engineering resin molds, IC molds, and sliding parts and scissors that require high wear resistance.
(14) HPM75: high hardness non-magnetic cutting steel, hardness 40 ~ 45HRC, suitable for magnetic field forming (plastic magnets) and so on.
(15) YAG: Super-strength steel, suitable for high toughness, super mirror mold (chip center tip, optical lens) and so on.
Hitachi Metals Co., Ltd.'s Anlai plant has a long history of more than one hundred years. The former factory of Yasugiwa Co., Ltd. was an Anlai steelworks company. It started in the Yunbo Tiegang joint-venture company established in 1899. In 1915, it expanded and developed into a manufacturing high-speed steel and high-grade specialty. Steel's professional workshops, through careful selection of various types of raw materials, adhering to traditional steelmaking technology, continue to innovate and professionally manufacture high quality die steel.
Hitachi Tool Steel's market share in Japan ranks first, and it is highly rated in the international market, thanks to Hitachi Matals' strong steel development capability and quality assurance system and experienced technology. service system.
Hitachi Matals' original ISOTROPY tool steel can reduce the difference in the longitudinal direction (calendar direction) and transverse mechanical properties of steels. It has isotropic characteristics. This technical idea is welcomed by users from all walks of life. The high degree of evaluation has been widely applied to all Hitachi Steel, and has made a great contribution to the stability and longevity of Hitachi Tool Steel.
The products of Hitachi Metals Co., Ltd. developed so far cover electronics, automotive, machinery, construction, and environmental fields such as IT parts and materials, magnetic application parts, flat panel displays, computers and semiconductor integrated circuit devices, automotive parts and materials, and environmental protection. System products, aerospace and nuclear power industrial materials, etc.
Hitachi Metals' mold steel includes:
1.YSS Cold Work Tool Steel:
(1) YCS3: JIS SKS93, specialty: a small amount of carbon tool steel for production; uses: stamping dies, jigs, tools, etc.
(2) SGT: JIS SKS3, specialty: General purpose cold work die steel with excellent machinability, to pay more attention to the quenching and electromachining of large parts; Uses: Dies and gauges for sheet metal, etc.
(3) HMD5 (medium C-Cr-Mo flame-hardened steel SKS grade), HMD1 (medium C-Cr-Mo-V flame-hardened steel SKD grade): all patented steel grades, specialty: flame-hardened steel, air-cooled, high hardness, Small deformation, good welding performance; Uses: sheet metal molds.
(4) ACD37: Features: Air-cooled, vacuum-hardened steel, with SGT quenchability, can improve the line cutting processability; Uses: sheet metal molds, gauges and so on.
(5) SLD: JIS SKD11, Corresponds to Cr12MoV, Features: High wear resistance universal cold work die steel, excellent quenchability, and quenching deformation, SLD performance is superior to other SKD11 die steel; Uses: General cold work die , forming rolls, shears and so on.
(6) ARK1 (C-Cr-Mo-V matrix cold work die steel): Patented steel, special features: high toughness, good machinability, good quenchability, quenching deformation of a model of cold working steel; Uses: sheet metal Die, printer motherboard mold, mechanical tools and so on.
(7) SLD8 (C-Cr-Mo-V high temperature tempered cold work die steel): Patented steel grades, specialty: Improved tool steel for cold working at high temperature tempering, hardness up to HRC62, excellent machinability, resistance Grinding and toughness; Uses: Reeling, cold forging die, shearing blade, high wear-resistant plastic die, etc.
(8) CRD: JIS SKD1, specialty: cold work die steel with the most superior wear resistance; use: drawing die, mass production of blanking die, liners and so on.
(9) HPM1: Patented steel grade, special feature: HRC40 free-cutting pre-hardened steel, good nitriding properties; use: a small number of production stamping die, fixtures, tools and so on.
(10) YXM1: JIS SKH51 is a universal high-speed steel with a wide range of uses. It has extremely high wear resistance and good toughness. In recent years, with the application of Hitachi Metal's ISOTROPY (isotropic) manufacturing process, the performance of YXM1 With a substantial increase, become the leader of similar products. Features: High-speed steel with high wear resistance and good toughness, high hardness, high strength, and good toughness at the same time; Uses: cold forging die, upsetting tool, longitudinal shearing machine, etc.
(11) YXM4 (JIS SKH55), XVC5 (JIS SKH57): Specialty: High-speed steel for wear resistance, sintering resistance, and high pressure resistance; Application: Cold forging dies, drawing dies, etc.
(12) YXR7 (High-strength model high-speed steel with high C-Mo-V): Patented steel, special feature: 62~65HRC, high-tensile steel with high toughness, vacuum quenching; uses: coil rolling, cold forging roll, cold forging Punch, blanking punch, etc.
(13) YXR3 (C-Mo-V Model High Speed ​​Steel): A patented steel grade, a new generation of high-speed steel refined by Hitachi Metals for many years, which is mainly aimed at greatly improving the toughness of conventional high-speed steels. It is a material that combines the strength of high speed steel with the toughness of hot die steel. Features: 58~61HRC, highest toughness, general purpose model high speed steel, vacuum quenching; uses: to avoid cracks, gaps and other molds.
(14) YXR33 (Low-C-Mo-V Model High Speed ​​Steel): Patented steel grade, specialty: High-speed steel with the highest toughness in high-speed steel, using a hardness of 56~58HRC; Use: Cold forging die, medium temperature die forging die, etc.
(15) HAP5R: powder high-speed steel, specialties: C-Mo-V high-toughness powder high-speed steel; uses: cold forging die, forging die and so on.
(16) HAP10: Powder high-speed steel, specialty: High-tenacity powder high-speed steel; Uses: precision stamping die, etc.
(17) HAP40: Powder high-speed steel, specialty: Universal powder high-speed steel with both wear resistance and toughness; Uses: Stamping dies, rolls, etc. for mass production.
(18) HAP72: Powder high-speed steel, specialty: High-speed steel with high hardness and highest wear resistance; Application: High-performance IC model for long-life cold plastic processing.
(19) SLD-MAGIC: It is a new generation mold steel with high service life and easy processing. It has the following characteristics: 1 Compared with SLD8 steel (80% Cr steel for SKD11), its wear resistance can be increased at 62HRC. %;2 Machinability is improved by 35% compared with SLD8; 3 Toughness is equivalent to SLD8 and improved over SKD11; 4 Heat treatment deformation ratio is reduced by about 40% compared to SLD8, shape error is improved; 5 Surface treatment performance is improved, TD, CVD is performed After the treatment, the bondability of the treated layer was increased by 30%. 6 The above 8% Cr and 10% Cr steels had reduced amounts of carbides. Although the machinability was improved, the wear resistance and seizure resistance were worse than that of SKD11. The wear resistance and seizure resistance of SLD-MAGIC is comparable to that of SKD11, while the toughness is increased, so that the life of the die will be greatly increased; 7 the size change after use is small, equivalent to SKD11, and after low-temperature tempering or cold treatment, stable after heat treatment After the treatment, the size change is smaller. 8 Due to the control of the carbide morphology, SLD-MAGIC has higher fatigue strength than SKD11. The annealing hardness of SLD-MAGIC is ≤ 255 HB. Quenching heating temperature 1010 ~ 1040 °C, the implementation of air-cooled quenching, quenching hardness up to 64HRC; tempering temperature: low temperature tempering at 150 ~ 250 °C, and then air-cooled, or at 480 ~ 530 °C, and then air-cooled to obtain ≥ 58HRC hardness Note that at this time, the hardness peak occurs at 500°C tempering, which generally reaches 60 to 62 HRC.
2. YSS hot-working tool steel (1) DAC: JIS SKD61, the most widely used in the aluminum-zinc die-casting mold, is a kind of hot die steel with good toughness and heat resistance balance, and its performance is extremely stable.
(2) DBC: JIS SKD62, general-purpose hot die steel used in hot stamping, etc.
(3) DAC3: Patented steel grade, 5Cr series high toughness hot die steel, superior toughness than DAC, suitable for high hardness extrusion die and hot stamping die to prevent cracks.
(4) DAC10: Patented steel grade, 5Cr series high-strength hot die steel, heat-resistant crack resistance and excellent wear resistance of hot die steel, suitable for precision die-casting molds and hot stamping die.
(5) DAC40: Patented steel grade, hot die steel for high-strength Al extrusion dies, superior to DAC for high temperature strength, suitable for softening Al extrusion dies and hot stamping dies.
(6) YEM: JIS SKD7, HATEBUR TYPE die and other strong hot and cold forging model steel.
(7) YEM-K: Patented steel grade, 3Cr series high-strength hot die steel, improved the high temperature strength and toughness of YEM hot die steel.
(8) HDC (JIS SKD5), YDC (JIS SKD4), MDC (JIS SKD8): W-containing high-strength hot die steels.
(9) MDC-K: Patented steel grade, high strength hot die steel with improved MDC toughness.
(10) DAC45: Patented steel grade, high-strength die-casting die steel, high-temperature strength, excellent crack resistance, suitable for hot stamping dies requiring wear resistance and high Si-Al die-casting dies requiring corrosion resistance.
(11) DM: JIS SKT4, steel for prehardened forging die.
(12) YHD28: Patented steel grade, high-toughness hot stamping die steel, large-size hot stamping die steel with excellent wear resistance and toughness, pre-hardened.
(13) YHD3: Patented steel, precipitation hardening hot stamping model steel, pre-hardened.
(14) FDAC: JIS SKD61 pre-hardened, easy-cut hot die steel.
(15) DAC55: DAC is the most widely used material for A1, Zn die casting, and has excellent strength, toughness, and heat resistance of hot work mold materials. In recent years, it has developed toward high toughness and isotropy. DAC55 is a high-performance die-casting mold steel, with a longer service life and high hardenability, heat-resistant fatigue and high toughness 5% Cr series of hot die steel for medium and large molds. Features: 1 excellent thermal cracking resistance; 2 can be used in the high hardness of 50~53HRC; 3 excellent crack resistance; 4 high high temperature strength; 5 high hardenability. Applications: Medium and large die casting molds, precision die casting molds and extrusion die casting molds. Heat treatment conditions: quenching heating temperature 1010 ~ 1030 °C, quenching; tempering temperature 550 ~ 640 °C; use of hardness: 43 ~ 53HRC. When the quenching at 1020 °C occurs in the range of 550 °C ~ 500 °C secondary hardening peak, breaking up to 53HRC. The recommended hardness of the mold: when the heat-resistant crack is the main (such as small pieces, extrusion mold) using 50 ~ 53HRC; under the general conditions of 46 ~ 50HRC; when the toughness is the main, then choose 43 ~ 46HRC more appropriate .
3.YSS plastic mold steel
(1) HPM7: Improved P20, suitable for molds requiring high weldability and machinability.
(2) HPM2: P20 modified, fast cutting type, suitable for opaque molding molds, daily-use molds.
(3) HPM77: SUS420J2 improved, fast cutting type, suitable for corrosion resistant molds, rubber molds and so on.
(4) PSL: SUS630 improved, suitable for pvc, foamed resin rubber products, etc.
(5) CENA1: A new type of plastic die steel containing Cr and Ni precipitation-hardening steel, which has corrosion resistance and easy machinability, has excellent polishing properties, etching patterns, and discharge processing characteristics, and is most suitable for the improvement of molds that produce seam lines. In the past, it has been widely used in high-bright highlighting molds.
(6) HPM1: P21 modified, fast cutting type, suitable for the manufacture of a variety of home appliances mold.
(7) HPM50: Improved P21, suitable for molds that require high specularity, erodability, and electrical dischargeability.
(8) HPM38: SUS420J2 improved, 13Cr series containing Mo stainless steel, made of special smelting, the most suitable for the high hardness, corrosion resistance and high processing of the plastic mold; HPM38 features are: 1 excellent mirror processing; 2 to SUS 420 J2 has better corrosion resistance, can be used without chrome plating; 3 heat treatment deformation is very small, suitable for precision mold; 4 is available under pre-hardened state (29~33HRC) and can be used directly. The use occasions are: 1 general molds for transparent products, such as lenses, cosmetics shell; 2 resin molds with added flame retardant, such as home appliances, office supplies, molds for communication devices; 3 can not be chrome-plated molds, such as food containers and medical The mold of the device. HPM38 heat treatment conditions: quenching heating temperature 1000 ~ 1050 °C, air cooling; tempering temperature 200 ~ 500 °C, air cooling; hardness up to 50 ~ 55HRC. It has a yield strength of 1618 MPa, a tensile strength of 1912 MPa, an elongation of 13%, and a shrinkage of 35% at 52 HRC.
(9)HPM38S: SUS420J2 is improved. Its cleanliness is higher than that of HPM38. It can be applied to molds with a surface roughness of less than 0.01μm. For example, it is used for the manufacture of optical discs and aspherical lenses. Its hardness is 50~55HRC.
(10) HPM31: SKD11 improved hardness of 56 ~ 60HRC, wear-resistant, suitable for engineering resin molds.
(11) ZCD-M: SKD11 modified, hardness 60 ~ 63HRC, suitable for IC die.
(12) ZDP282: SUS440C improved powder tool steel, hardness 60 ~ 63HRC good corrosion resistance, suitable for engineering resin molds and optical disc molds.
(13) ZDP4: High-alloy powder steel with a hardness of 60 to 65 HRC. Excellent wear resistance and corrosion resistance. Suitable for engineering resin molds, IC molds, and sliding parts and scissors that require high wear resistance.
(14) HPM75: high hardness non-magnetic cutting steel, hardness 40 ~ 45HRC, suitable for magnetic field forming (plastic magnets) and so on.
(15) YAG: Super-strength steel, suitable for high toughness, super mirror mold (chip center tip, optical lens) and so on.