Effect of controlled cooling process in finish rolling on banded structure of gear steel 20CrMoH
In order to reduce banded structure of gear steel 20CrMoH,three kinds of through-water cooling experiments on Φ80 mm bars were carried out in finish rolling.The results showed that in the process of through-water cooling before finish rolling,the finish rolling was in the two phase zone,with the banded structure level 2.5-3.0,while in the process of through-water cooling after finish rolling and the process of through-water cooling both before and after finish rolling,the finish rolling was in austenite phase zone,with the banded structure level 1.5-2.0.Especially when finish rolling was in austenite non-recrystallized zone,the banded structure level was 1.0-1.5.
NETL
NSTL
万方数据
维普
