Project(51305388)supported by the National Natural Science Foundation of China;Project(BJ2014055)supported by the Youth Talent Projects of Colleges in Hebei Province,China;Project(2016M590211)supported by China Postdoctoral Science Foundation
Because of the mixed grain and coarse grain structure, the long heat treatment cycle and large energy conservation in the heavy cylinder heat treatment process, the up ladder type and terraced type normalizing heat tr...