The SKD61 【the SKD61 Products:] SKD61 die steel performance: a vacuum degassing refining treatment the a pure steel surface corrosion resistance is conducive to rapid stripping of products. Cutting performance is good. Strengthen the elements vanadium, molybdenum Add special, extremely excellent abrasion resistance. 4.SKD61 with good toughness and resistance to high temperature fatigue properties can withstand temperature fusion, suitable for long-term work with good cutting and polishing performance at high temperatures. Smelting furnace and 5.SKD61 after remelting, steel purer, better toughness. SKD61 die steel use: suitable for making aluminum, zinc, copper alloy extrusion die, die casting, forging die and hot shear blades, and other specifications overcast bright steel (peeling, cold drawn) material is produced plunger, the Secretary for The products can be processed by the cylinder SKD61: SKD61 SKD61 thimble, SKD61 guide post, the SKD61 guide sleeve, SKD61 Secretary extinguishers, SKD61 punch needle, SKD61 Bliss off chemical composition: SKD61 chemical composition (mass fraction) as follows (%): C: 0.32 ~ 0.42 Si: 0.8 to 1.2 Mn: ≤ 0.50 Cr: 4.50 ~ 5.50 Mo: 1.00 to 1.50 V: 0.8 to 1.2 S: ≤ 0.03 P: ≤ 0.03 SKD61 tool steel how to use? SKD61 is a high-carbon high-chromium alloy tool steel, heat treatment has a high hardness and wear resistance, hardenability, good dimensional stability, suitable for production of high-precision long-life cold work die and thermosetting molding plastic mold. The thickness of not more than 2MM sheet, efficient blanking die, rushed out mold and pressure die. A variety of scissors, inlaid blades, woodworking blade. Thread rolling die and wear slider. Cold Heading Die thermosetting resin molding. Molding, deep drawing cold extrusion dies. SKD61 Hardness: prior to the heat treatment, the hardness of HRC15 to 20 (HB200 to 230) after the heat treatment SKD61: Internal HRC40 ° to 45 ° surface HV1000 ± 100 SKD61 density is 7.85g per cubic centimeter the SKD61 heat treatment method (1): Quenching: Preheat the stage: the second stage of 500 to 550 ° C Preheat: 750 to 800 ° C Hair cooling or high-pressure gas cooling from 100 to 150 ° C into the furnace. Tempering: Preheat: 300 to 350 ° C tempering heating: 550 to 680 ° C air cooled to room temperature, tempering three times. Quenching temperature from 1000 to 1050, hardness 50 ~ 55HRC, heat deformation small, surface nitriding nitriding processing out of the product has better wear resistance. SKD61 deep hot and cold processing method (2): In order to obtain the highest hardness and dimensional stability, the mold immediately after quenching cryogenic -70 to -80 ° C and maintained for 3-4 hours, and then in the tempering treatment, by cryogenic treatment, tool or mold hardness than conventional heat treatment hardness high the 1-3HRC. Complex shape and size changes in the larger parts, the cryogenic treatment production risk of cracking the SKD61 nitride treatment (3): the mold or the workpiece, the hardened layer formed on the surface layer with high hardness and corrosion resistance after nitrogen treatment organization. Hardness: annealing, 235 to 205HB, quenching, ≥ 50HRCV the Shanghai Hai extension SKD61 mold steel spot sales specifications circle (mm): 10/13-20-45-50 160-200 250-350 flat (mm): 26 * 32 -38-45-50-65-70-90-105-130-155-185-205-260-305-360-410-460 2832-38-45-50-65-70-90-105-130 - 155-185-205-260-305-360-410-460 32 * 32-38-45-50-65-70-90-105-130-155-185-205-260-305-360-410-460- 35 * 32-38-45-50-65-70-90-105-130-155-185-205-260-305-360-410-460 38 * 32-38-45-50-65-70-90 -105-130-155-185-205-260-305-360-410-460 45. * 32-38-45-50-65-70-90-105-130-155-185-205-260-305 - 360-410-46050 * 32-38-45-50-65-70-90-105-130-155-185-205-260-305-360-410-460 60 * 32-38-45-50 - 65-70-90-105-130-155-185-205-260-305-360-410-460 70 * 32-38-45-50-65-70-90-105-130-155-185-205 -260-305-360-410-460 80 * 32-38-45-50-65-70-90-105-130-155-185-205-260-305-360-410-460 100 * 32-38 -45-50-65-70-90-105-130-155-185-205-260-305-360-410-460 200 * 32-38-45-50-65-70-90-105-130 - 155-185-205-260-305-360-410-460