Material Name: mold steel (haituojs) Material Grade: SKD11 material standard: JIS G4404: 2000 material heat treatment hardness: HRC58-60 SKD11 - high-carbon high-chromium alloy tool steel has high hardness grinding after heat treatment, and has The hardenability strong, dimensional stability and good, suitable for making high-precision long-life cold work die and thermosetting molding plastic mold. SKD11 characteristics: good toughness and resistance to high temperature fatigue properties can withstand temperature fusion, suitable for long-term work in high temperature with good cutting and polishing performance SKD11 introduced (haituojs) is not greater than the thickness of 6mm sheet, efficient blanking die. Punch die and pressure die scissors, inserts, woodworking blade thread rolling die and wear slider cold heading die, thermosetting resin molding, senior gauge deep drawing forming, cold extrusion die. The SKD11 use (for reference only) (haituojs). "Quenching and tempering" state 2. Quenching + cryogenic treatment and tempering state (suitable for high-precision and dimensional stability requirements). "Quenching + tempering + nitriding treatment state (suitable for the high surface hardness requirements). cryogenic treatment to obtain maximum hardness and dimensional stability, mold immediately after quenching deep cold of -70 to -80 ° C, maintained for 3-4 hours , and then to return fire treatment, high hardness than conventional heat treatment the cryogenic processing tools or mold hardness-3HRC. The complex shape and size changes in large parts cryogenic processing produces the risk of cracking. 5 the nitriding treatment mold or workpiece nitride treatment, the surface to form a layer having a high hardness and a certain corrosion resistance of the hardened structure. 6 at 525 ℃ nitriding process, surface hardness of about 1250HV, nitridation time on the nitrided layer to affect the following table below. Nitridation time (hours) 20 30 60 nitriding depth (mm) 0.25 0.30 0.35 7. At 570 ° C soft nitriding treatment, the workpiece surface hardness of about 950HV. Usually soft nitriding treatment for 2 hours, the depth of the hardened layer can be achieved of 10-20um. Grinding die blanks or work generated in the low-temperature tempering state, grinding easy grinding cracking. Small grinding feed rate should be taken in order to prevent the occurrence of cracks repeatedly grinding, water-cooled auxiliary plus good condition. Wire cutting complex shapes or large size mold, the final trip wire cutting, usually encountered when cracking occurs. In order to prevent cracking, it is recommended that the use of gas quenching and tempering treatment to reduce the heat treatment stress, or pre-processing of the embryos die cavity. SKD11 chemical composition (haituojs)% C carbon 0.40 Mn 1.40-1.60 Si silicon manganese 0.50 Cr chromium 11.00-13.00 Mo Mo 0.80-1.20 V vanadium 0.30 P the sulfur the <0.025 Skd11 heat treatment (haituojs) quenching: first preheat to 700 ~ 750 ℃ then heated to 1000 ~ 1050 ℃ still air cooling, such as the steel with thickness of 6 inches or more heating to 980 ~ 1030 ℃ in oil hardened better. Tempering: heating to 150 to 200 ° C, dwell at this temperature, then cooled in still air. Hardness: HRC 58 or more. Annealing: heating to 800 ~ 850 ℃, stay at this temperature for 1 to 3 hours, allowed to cool gradually in the oven. Wrought: 900 ~ 1050 ℃. Skd11 application: (haituojs) cold model, forming rolls, scissors, the complex shape of the cold-pressed tools, plastic mold and so on. Skd11 steel characteristics: (haituojs) This steel is extremely high-carbon, high-chromium steel, wear resistance and toughness, and quenching resistance, heat treatment distortion less. Skd11 sizes: round (MM) (Haituo actual inventory specifications) 10-13-20-45-45-50-150-160-220-250-350 flat (MM) (Haituo the actual inventory Specification) 13 * 32-38-45-50-65-75-90-105-130-155-185-205-260-305-360-410-460-510-610 16 * 32-38-45-50-65-75 -90-105-130-155-185-205-260-305-360-410-460-510-610 19. * 32-38-45-50-65-75-90-105-130-155-185 - 205-260-305-360-410-460-510-610 22 * ??32-38-45-50-65-75-90-105-130-155-185-205-260-305-360-410-460 -510-61025 * 32-38-45-50-65-75-90-105-130-155-185-205-260-305-360-410-460-510-610 28 * 32-38-45 -50-65-75-90-105-130-155-185-205-260-305-360-410-460-510-610 32. * 32-38-45-50-65-75-90-105 - 130-155-185-205-260-305-360-410-460-510-610 38 * 32-38-45-50-65-75-90-105-130-155-185-205-260-305 -360-410-460-510-610 45 * 32-38-45-50-65-75-90-105-130-155-185-205-260-305-360-410-460-510-610 50 * 32-38-45-50-65-75-90-105-130-155-185-205-260-305-360-410-460-510-610 65 * 32-38-45-50-65 - 75-90-105-130-155-185-205-260-305-360-410-460-510-610 75 * 32-38-45-50-65-75-90-105-130-155-185 -205-260-305-360-410-460-510-610 Skd11 (haituojs) material: SKD11 (SLD) material belongs: cold work die steel manufacturers: the Japanese Hitachi Metals physical properties: SKD11 - kind of high-carbon high chromium, after heat treatment with high hardness wear resistance and hardenability, good dimensional stability characteristics suitable for making high-precision long-life cold work die and thermosetting molding plastic mold. Willful and resistance to high temperature fatigue properties can withstand temperature fusion, suitable for long-term work in high temperature with good cutting and polishing performance. Delivery Hardness: Annealed hardness and ≤ 255HBS Typical applications: the 1 production incision mold, scissors, circular saw blades, cold work or heat to do the trimming mode, the drum side, screw pattern, line mode, transformer core die cutting steel skin rolling knife , steel pipe forming roller, screw Heading mold Description: SKD11 use "quenching and tempering state 2 state quenching + cryogenic treatment and tempering (suitable for high-precision and dimensional stability requirements) 3 (suitable for high surface hardness requirements) 4. cryogenic treatment in order to obtain the highest hardness and dimensional stability, mold immediately after quenching deep cold of -70 degrees Celsius to -80 degrees Celsius, quenching and tempering + nitriding state maintained for 3-4 hours, then return fire deal, the cryogenic processing tools or mold hardness than conventional heat treatment hardness-3HRC. The complex shape and size changes in large parts cryogenic processing produces the risk of cracking. 5 the nitriding treatment mold or workpiece nitride treatment, the surface to form a layer having a high hardness and a certain corrosion resistance of the hardened structure. 6 at 525 ℃ nitriding process, surface hardness of about 1250HV, nitridation time on the nitrided layer to affect the following table below. Nitridation time (hours) 20 30 60 nitriding depth (mm) 0.25 0.30 0.35 7. At 570 ° C soft nitriding treatment, the workpiece surface hardness of about 950HV. Usually soft nitriding treatment for 2 hours, the depth of the hardened layer can be achieved of 10-20um. Grinding die blanks or work generated in the low-temperature tempering state, grinding easy grinding cracking. Small grinding feed rate should be taken in order to prevent the occurrence of cracks repeatedly grinding, water-cooled auxiliary plus good condition. Wire cutting complex shapes or large size mold, the final trip wire cutting, usually encountered when cracking occurs. To prevent cracking, it is recommended that the gas quenching and tempering treatment, in order to reduce the heat treating stress, or embryos die cavity SKD11 more use of pre-processing: a thickness ≤ 6mm steel sheet efficient blanking die, punching die pressure impression. 2 all kinds of scissors, inserts, thread rolling die wear slider cold heading die, deep drawing forming; cold extrusion dies. 4 can also be used as the thermosetting resin molding, generally plastic mold. The domestic Cr12MoV, D2, Japan of SKD11 three performance comparison the same Cr12MoV steel compared, D2 steel increase in the chemical composition of the MO V ingredients, changed the cast structure of steel, improved ledeburite morphology, strength and toughness and wear resistance than Cr12mov steel, to improve the life of the mold. Since the yield point of the steel and plastic steel deformation resistance than Cr12mov the high, thus forging performance thermoplastic than Cr12mov slightly worse. The domestic Cr12mov, D2, Japan SKD11 three despite the same chemical composition, but the performance difference is still very large. After heat treatment of domestic steel color minimal deviation orange, deformation is generally very easy to accidentally fatigue fracture occurs when the actual use; cool white D2 steel color, hardness higher than SKD11, toughness not SKD11, high stress Source tiny gap; SKD11 color Guangrun and best overall performance. (Haituojs)