Effect of tempering on bonding characteristics of cross wedge rolling 42CrMo/Q235 laminated shafts  

作　　者：Shuai Zhu Wen-fei Peng Xue-dao Shu 

机构地区：[1]Zhejiang Provincial Key Laboratory of Part Rolling Technology,Ningbo University,Ningbo 315211,Zhejiang,China

出　　处：《Journal of Iron and Steel Research International》2020年第10期1170-1178,共9页

基　　金：supported by the Fundamental Research Funds for the Provincial Universities of Zhejiang(No.SJLZ2021002);the Natural Science Foundation of Zhejiang Province(Grant No.LY18EO50006);the Natural Science Foundation of Ningbo City(Grant No.2017A610088);the Ningbo Science and Technology Innovation 2025 Major Project(2018B10004,2019B10100);National Natural Science Foundation of China(Grant No.51405248)。

摘　　要：To further improve the comprehensive properties of 42CrMo/Q235 laminated shafts produced by cross wedge rolling.theheat treatment of the shafts was studied.Tensile and bending tests were carried out to compare the changes in mechanicalproperties before and after heat treatment.The results showed that the interfacial bonding strength increased most aftertempering at 350℃for 45 min.The microstructure of the interface was observed using a digital microscope.The resultsshowed that the dispersed oxides on the interface were basically eliminated by using the scheme of tempering at 350 cand holding for 45 min.The reasons for the change in mechanical properties were explained from the point of theinterfacial microstructure.Scanning electron microscopy was used to analyze the micro-morphology of the tensile fracture.lt was observed that after tempering at 350℃and holding for 45 min,the dimple holes became larger and deeper,and thestructure of fracture became more uniform and stable.From the point of the tensile fracture morphology.the reasons for thechange in mcchanical propcrties wcrc explained as well.

关 键 词：Heat treatment Cross wedge rolling INTERFACE MICROSTRUCTURE Fracture morphology 

分 类 号：TG142.1[一般工业技术—材料科学与工程]