高温合金GH4169焊接管材三辊轧制的组织和力学性能演变  

Evolution of Microstructure and Mechanical Properties of GH4169 High Temperature Alloy Welded Tube after Three-roller Rolling

作　　者：郑文涛[1] 苏明[1] 李光宇 周丽新[3] 

机构地区：[1]沈阳工业大学材料科学与工程学院,辽宁沈阳110870 [2]东北大学材料科学与工程学院,辽宁沈阳110819 [3]中国科学院金属研究所.辽宁沈阳110016

出　　处：《热加工工艺》2017年第19期122-124,128,共4页Hot Working Technology

基　　金：辽宁省教育厅支持项目(L2015401)

摘　　要：对管坯焊接前后的组织进行了观察,并进行了三道次的三辊冷轧,道次间进行了固溶处理。结果表明,焊接后的焊缝组织是柱状树枝晶组织;冷轧并固溶处理后,管材上的焊接位置已经难以分辨,原始的焊缝组织完全转变为均匀组织;经过三辊轧制后,焊接接头与母材的强度接近,塑性有了明显的提高,强度略高于母材。The microstructure of the tube blank before and after welding was observed. Three rolls cold rolling with three passes was carried out, and the solution treatment was carded out between the passes. The results show that the weld microstructure is columnar dendrite microstructure; after cold rolling and solid solution treatment, the welding position on the pipe has been difficult to distinguish, and the original weld microstructure is completely transformed into homogeneous microstructure; after three-roller rolling, the strength of the welded joint is close to that of the base metal, the plasticity is obviously improved, and the strength is slightly higher than that of the base metal.

关 键 词：GH4169铬镍铁合金 三辊轧制 显微组织 力学性能 

分 类 号：TG337.1[金属学及工艺—金属压力加工]