Outline

SKD61 is a Japanese brand of hot work tool steel grade corresponding to our (GB / T 1299-2000) is 4Cr5MoSi V1, is the most widely used hot work tool steel, SKD61 corresponding U.S. standard is H13, South Korea is the STD61.

Feature
● pure steel vacuum degassing refining process.
● ball softening annealing treatment, a good cutting performance.
SKD61 picture
● strengthen the elements vanadium, molybdenum special by adding, extremely excellent wear resistance.
SKD61 has good toughness and fatigue resistance can withstand high temperature fusion temperature, suitable for long-term work at high temperatures with good cutting and polishing performance. SKD61 by electric furnace smelting and after electroslag remelting steel cleaner, better toughness. Making appropriate use of aluminum, zinc, copper alloy extrusion die, die casting mold, forging dies, hot shear blades, and other small size negative light steel (skinned, cold-drawn) material, is the production of ejector, Division tube ideal material SKD61 also appropriate to create high-volume plastic mold nitriding nitriding treatment can get a good mold surface hardened layer of tissue, for the extrusion die to improve wear resistance, corrosion resistance, the effect is very significant; for die-casting mold nitriding treatment can significantly improve the surface corrosion resistance is conducive to rapid stripping products.
SKD61 hot work tool steel with a beautiful metallic luster, SKD61 series products: SKD61 thimble, SKD61 guide post, SKD61 guide sleeve, SKD61 Division tube, SKD61 Chong-pin, SKD61 Floating precision marketing and other high-temperature parts as shown:
Use
SKD61 is a high-carbon high-chromium alloy tool steel, heat treatment has a high hardness and wear resistance, hardenability and a strong and good dimensional stability, long life suitable for production of high precision cold die and thermosetting molding plastic mold.
Use
Thickness of not more than 2MM thin sheet, efficient blanking die, punching die and pressure die set.
A variety of scissors, inlaid blade, woodworking blade.
Thread rolling die and wear slider.
Cold heading dies, thermosetting resin molding.
Deep drawing molding, extrusion dies.
Physical properties
SKD61 Hardness:
SKD61 before the heat treatment of about HRC15 ~ 20 (HB200 ~ 230)
After heat treatment the hardness: HRC40 ° ± 45 ° internal surface HV1000 ± 100
SKD61 density is 7.85g per cubic centimeter
Chemical composition
As follows (%): C: 0.32 ~ 0.42
Si: 0.8 ~ 1.2
Mn: <= 0.50
Cr: 4.50 ~ 5.50
Mo: 1.00 ~ 1.50
V: 0.8 ~ 1.2
S: <= 0.03
P: <= 0.03
Heat treatment
Air-cooled quenching, quenching temperature 1020 ~ 1050, hardness 56 ~ 58HRC, heat deformation small, surface nitriding nitriding process, the processing out of the product has better wear resistance.
Cryogenic treatment
In order to obtain the highest hardness and dimensional stability, immediately after quenching the mold in the deep cold -70 to -80 ℃, remain 3-4 hours, and then tempered by the cryogenic treatment of tool or mold hardness than conventional heat treatment hardness 1 -3HRC. Complex shape and size changes in the larger parts, cryogenic treatment has produced the risk of cracking