摘要
采用粘弹塑性有限元方法,研究了16MND5钢厚壁圆筒在不同局部热处理标准(B31.1、B31.3、ASME section NB、BS2633和AWS D10.10)加热条件下焊接残余等效应力、环向应力及轴向应力的变化及分布情况。综合分析了焊缝中心及其附近区域的焊接残余应力、加热区边缘附加热处理应力,并讨论了加热宽度、保温宽度对焊后局部热处理效果的影响。结果表明,局部热处理后,加热区边缘不均匀加热引起一定的应力上升,保温区的存在可以缓解温度梯度,从而使加热区边缘的附加应力降低。对厚壁圆筒来说按AWS D10.10标准局部热处理时,焊缝中心可达到与整体热处理相当的效果,焊接残余应力消除效果最好。
Variation and distribution of welding residual equivalent stress,circumferential stress and axial stress in 16MND5 steel thick-walled cylinders under different heating conditions of local heat treatment standards(B31.1,B31.3,ASME section NB,BS2633 and AWS D10.10)were studied by using the viscoelastic plastic finite element method.A comprehensive analysis was conducted on the welding residual stress in the center and vicinity of the weld seam,as well as on the heat treatment stress attached to the edge of the heating zone.The influence of heated band width and insulation band width on the local post weld heat treatment effect was also discussed.The results show that after local heat treatment,uneven heating at the edge of the heating zone causes a certain increase in stress,and the presence of the insulation zone can alleviate the temperature gradient,thereby reducing the additional stress at the edge of the heating zone.For thick-walled cylinders,when subjected to local heat treatment according to AWS D10.10 standard,the center of the weld seam can achieve a similar effect as the overall heat treatment,and the residual stress relief effect of welding is the best.
作者
刘姿
孔为民
Liu Zi;Kong Weimin(Institute for Innovation and Entrepreneurship,North University of China,Taiyuan Shanxi 030051,China)
出处
《金属热处理》
CAS
CSCD
北大核心
2024年第9期221-225,共5页
Heat Treatment of Metals
关键词
厚壁圆筒
16MND5钢
焊后局部热处理
加热宽度
保温宽度
thick-walled pipe
16MND5 steel
local post weld heat treatment
heated band width
insulation band width
作者简介
刘姿(1990-),女,实验师,硕士,主要研究方向为焊接有限元分析,E-mail:liuzi@nuc.edu.cn;通信作者:孔为民,高级实验师,硕士,E-mail:1741473198@qq.com。
