Influence of composition segregation on pre-hardening hardness of 1.2085 die steel while forging large die blocks
The pre-hardening hardness of 1.2085 die steel developed by Fushun Special Steel Shares Co.,Ltd.exceeded the standard requirement while forging large die blocks.The effect of macro-composition segregation on pre-hardening hardness of 1.2085 die steel was studied by add etching test,hardness test,chemical composition analysis and heat treatment test.The results showed that the macro-composition segregation was mainly carbon and sulfur segregation,and the carbon segregation impacted on prehardening hardness.The hardness at positive carbon segregation position was higher and the hardness at negative carbon segregation position was lower.The larger was the size of ingot,the more serious was the effect,and the heat treatment could not eliminate this kind of effect.
1.2085 die steellarge die blockcomposition segregationpre-hardening hardness
NETL
NSTL
万方数据
维普
