SKH51

La description

Componentï¼… C碳 Si矽 Mné”° Cr（铬） Wé’¨ V（钒） Moé’¼ VP磷 S硫黄 0.*5 0.*5 0.*5 4.*0 5.*0 1.*0 4.*0 0.*3 0.*1 Forging: 1.**0～**0°C Anneal: Heat up to ******0°C and stay for **4h in this temperature to cool slowly in furnace; Quenching: Pre-heat up to ******0°C; then heat up to **0°C; and again heat up to: a：1，**0～***0°Cï¼›b：1，**0°C～***0°C; Quench in oil but the temperature of oil has to be kept ****0°C. (a. common tools; b. complex tools requiring for flexibility.) Backfire: Heat up to ******0°C and stay in this temperature; then keep still in air for cooling; to back fire has to repeat for twice. Hardness: more than HRC*3°C. Uses: This steel is of high speed tungsten steel, adapted for making strong cutting tools of wear resistance, various tools of impact resistance, high grade punching dies, screw dies, complex tools requiring for flexibility, milling cutters, aiguilles and so on.