Features Uses high wear characteristics common cold work die steel; hardened resistance, less heat deformation. ?? Its advantages: (1) vacuum degassing refining, so the internal quality extremely clean (2) good machinability (3) Good hardenability, air cooling can be cured without fear of quenching crack (4) heat deformation very small, quenching deviation is extremely small, the most suitable for precision mold (5) Wear very best, most suitable for stainless steel or high-hard material blanking die (6) good toughness. The purpose of this steel is easy turning, and It should be made sharp knife, scissors, saw, cold or hot trimming mode, the drum edges, screws pattern, line die cutter, the impact of mold, round cylinder, the system of power transformers heart dies, cutting steel skin rolling knives, steel forming rollers, special molding roller, precision gauge, shape complexity of the cold tools, spindles, metallurgy, tin for mold, plastic mold, screw head molds. 1. Use of "quenching and tempering" state use under 2. "cold treatment quenching and tempering" state use (suitable for high precision and dimensional stability requirements) 3. "quenching and tempering + nitriding treatment" state use (suitable for high surface hardness) 4. Cryogenic treatment in order to obtain maximum hardness and dimensional stability, the mold immediately after the quenching of cryogenic -70 ° C to -80 ° C, for 3-4 hours, then return to the fire treatment, by tool or mold hardness cryogenic treatment than conventional heat treatment hardness 1-3HRC. Changes in the shape and size of a large complex parts, cryogenic treatment of the risk of cracking. 5. nitriding mold or workpiece nitriding, the surface layer has high hardness and corrosion resistance of certain hardened tissue.