Weld Characteristics and NC Bending Formability of QSTE340 Welded Tube  

作　　者：任宁 詹梅 杨合 秦亚涛 张志勇 蒋浩民 刁可山 陈新平 

机构地区：[1]State Key Laboratory of Solidification Processing, School of Materials Science and Engineering, Northwestern Polytechnical University [2]Baosteel Group Corporation

出　　处：《Transactions of Tianjin University》2011年第4期288-292,共5页天津大学学报（英文版）

基　　金：Supported by National Natural Science Foundation of China (No. 50875216)

摘　　要：The mechanical characteristics of the weld joint were investigated by tensile test, microstructure test, and microhardness test. The welded tube NC bending tests were carried out to evaluate the weld on the formability of the QSTE340 welded tube. The results show that the wall thinning degree, cross-sectional deformation and springback angle increase significantly as the weld line is located on the outside of the bend compared with that located on the middle and inside, and the welded tubes produce nearly identical performance as the weld line is located on the middle and inside. The wall thickening degree decreases much as the weld line is located on the inside of the bend. So the welded tube can acquire good bending formability as the weld line is located in the region away from the outside of the bend.The mechanical characteristics of the weld joint were investigated by tensile test, microstructure test, and microhardness test. The welded tube NC bending tests were carried out to evaluate the weld on the formability of the QSTE340 welded tube. The results show that the wall thinning degree, cross-sectional deformation and springback angle increase significantly as the weld line is located on the outside of the bend compared with that located on the middle and inside, and the welded tubes produce nearly identical performance as the weld line is located on the middle and inside. The wall thickening degree decreases much as the weld line is located on the inside of the bend. So the welded tube can acquire good bending formability as the weld line is located in the region away from the outside of the bend.

关 键 词：weld characteristic NC bending FORMABILITY welded tube 

分 类 号：TG457.6[金属学及工艺—焊接]