论文部分内容阅读
利用有限元软件ABAQUS,开发了一个顺次耦合的热应力有限元计算程序,对0Cr18Ni9/20和1Cr5Mo/20异种钢焊接接头残余应力进行了有限元模拟分析.结果表明,无论是采用奥氏体不锈钢焊条A302焊条还是镍基焊条Incone182焊条,0Cr18Ni9/20钢和1Cr5Mo/20钢焊接接头中最大的轴向残余应力和环向残余应力产生在20钢侧的热影响区,0Cr18Ni9侧有最小的焊接残余应力.采用Incone182来代替A302可以有效地降低残余应力值,提高抗应力腐蚀开裂的能力.
By using finite element software ABAQUS, a sequential coupled thermal stress finite element program was developed to simulate the residual stress of 0Cr18Ni9 / 20 and 1Cr5Mo / 20 dissimilar steel welded joints.The results show that, whether austenite The maximum axial residual stress and hoop residual stress in stainless steel electrode A302 or nickel-based electrode Incone182 electrode, 0Cr18Ni9 / 20 steel and 1Cr5Mo / 20 steel welded joint are generated in the heat-affected zone on the side of steel 20, with minimal welding on the 0Cr18Ni9 side Residual Stress Using Incone182 instead of A302 can effectively reduce the residual stress and improve the resistance to stress corrosion cracking.