Causes of defects of Cr12 die steel during continuous rolling and improving
The causes of the defects of Cr12 cold working die steel that occurred during heating and rolling after the combustion medium of the heating furnace was changed from coal gas to natural gas were analyzed.Aiming at the causes,the equipment preparation before production,the heating type and the heating process were improved.The heating temperature,the soaking time and the length of head cutting were optimized.After improvement,the product quality was enhanced and the reject rate of rolling was decreased at the same time.The reject rate of rolling was reduced from 5.27 ％ to 0.3％.
Cr12 cold working die steelcontinuous rollingpull crackhead splitting
NETL
NSTL
万方数据
维普
