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Cr12,high hardness, wear resistance ,the features of composition design,high hardenability, high toughness. The use of Electric arc furnace (EAF+ refiningLF+ VacuumVD or SKF+ Vacuum Electro-slag (ESRmake the production of die steel are in high purity and good performance. Suggesting for heat treatmentanneal 820-880 Hardness≤229HBTemperature for Quenching1010-1030,rapid cooling.Temperature for Tempering550-650,thrice Tempering, 47-49HRC,not suggest to use highest temperature to temperHardness43~53HRChigh-carbon, high-chromium ledeburite type steel, the content of carbon are more than2%, which make it is poor impact toughness, easy to rattle, and easy to form uneven eutectic carbide.Serious carbide segregation, so to the ledeburite Cr12 type steel must be forged, to improve the Non-uniformity of the carbide, in order to promises the hardness, strength and the life of use of the mold, the performance advantages and the uses1Highlight advantagegood hardenabilitygood wear resistance (1)