热轧和冷轧工艺对MGH754合金板材组织及性能的影响  

Effect of hot rolling and cold rolling on microstructure and properties of MGH754 alloy sheet

作　　者：李帅华[1] 柳光祖[1] 杨峥[1] 

机构地区：[1]钢铁研究总院高温材料研究所,北京100081

出　　处：《金属热处理》2009年第9期44-47,共4页Heat Treatment of Metals

摘　　要：通过光学显微镜、扫描电镜和透射电镜对热轧和冷轧后的MGH754合金板材的显微组织和断口形貌进行了分析,研究了冷轧与热轧工艺对其组织以及力学性能的影响。结果表明,MGH754合金热轧板材的终态组织是发生了二次再结晶的粗晶组织,而冷轧板材只发生了一次再结晶。热轧板材的高温抗拉强度要优于冷轧板材,但其高温伸长率却低于冷轧板材。The microstructure and fracture morphology of hot-rolled and cold-rolled MGH754 alloy sheet were analyzed by using optical mierosopy, scanning electron microscopy and transmission electron microscopy, the effect of cold rolling and hot rolling processes on microsructure and mechnical properties of the alloy sheet was investigated. The resuhs show that final mierostructure of the hot-rolled sheet is coarse-grained structure as a result of the occurrence of secondary recrystallization, but the cold-rolled sheet has only a primary recrystallization. Hot-rolled sheet has higher elevated-temperature tensile strength. However cold-rolled sheet possesses outstanding elevatedtemperature elongation instead.

关 键 词：MGH754合金板材 冷轧 热轧 一次再结晶 二次再结晶 力学性能 

分 类 号：TG132.3[一般工业技术—材料科学与工程]