小孔法测量Cr-Ni奥氏体不锈钢焊接残余应力的适用性研究  

STUDY ON FEASIBILITY OF HOLE DRILLING METHOD FOR MEASUREMENT OF WELDING RESIDUAL STRESS IN Cr-Ni AUSTENIC STAINLESS STEEL

作　　者：李荣锋[1] 祝时昌[2] 陈亮山[2] 

机构地区：[1]武汉钢铁集团公司 [2]中国科学院金属研究所

出　　处：《钢铁研究》1999年第5期43-45,40,共4页Research on Iron and Steel

摘　　要：应变释放系数Ａ、Ｂ 的标定试验发现，直到单轴拉伸应力达到０．７３σｓ 时，孔边屈服产生的塑性变形才发生，对Ｃｒ － Ｎｉ 奥氏体不锈钢小孔法测量残余应力的影响小。同时经过小孔法和全释放法测量实际焊接残余应力及其分布的对比发现，只要选择恰当的应变片，使之与小孔孔径匹配，小孔法测量高残余应力，特别是焊接残余应力仍有较好的适用性。ＳＵＳ３２１ 不锈钢的对接接头的纵向焊接残余应力最大值为５４０ＭＰａ。Synopsis It is found out from calibration tests of strain relief constant A & B that plastic deformation caused by the yield around the drilling hole has little influence on the measurement of the welding residual stresses in Cr-Ni austenic strainless steel by the hole drilling method since it does not occur till the drawing stress at the single axis approaches 0.73σ s.In the meanwhile results from a comparision of the measured value of the actual residual stress in Cr-Ni austenic strainless steel and its...

关 键 词：适用性 小孔法 焊接残余应力 Cr-Ni奥氏体不锈钢 

分 类 号：TG115.62[金属学及工艺—物理冶金]