摘要
利用X射线应力测定仪采用不同的条件分别测定了304不锈钢薄壁焊管的表面轴向和切向残余应力,并研究了950℃保温30min水冷热处理前后其表面残余应力的变化。结果表明:采用铬靶Kβ辐射、2mm准直管测得的残余应力数据稳定且绝对误差小;热处理前薄壁焊管表面存在较大的残余拉应力,且焊管表面切向残余应力大于轴向残余应力;热处理后,表面拉应力变为压应力。
Axial and tangential surface residual stresses of 304 stainless steel thin-wall welded pipe were measured by X-ray stress tester through different methods.The surface residual stress change of the alloy before and after heat treated at 950 ℃ for 30 min and water cooling was studied.The results show that the data was stable and absolute error was small by the method of Cr Kβ and radiation 2 mm collimator.There was large residual tensile stress on the surface of the 304 stainless steel thin-wall welded pipe before heat treatment.And the tangential residual stress was greater than the axial residual stress.The surface residual tensile stress changed to compressive stress after heat treatment.
出处
《机械工程材料》
CAS
CSCD
北大核心
2012年第2期80-82,99,共4页
Materials For Mechanical Engineering
基金
上海市重点学科建设资助项目(B602)
关键词
304不锈钢
薄壁焊管
残余应力
热处理
304 stainless steel
thin-wall welded pipe
residual stress
heat treatment
