预拉伸对奥氏体不锈钢焊接残余应力影响的研究
发布时间：2018-08-30 18:32
【摘要】：奥氏体不锈钢应变强化技术是通过产生一定的塑性形变来提高材料的屈服强度从而达到节省材料的目的。为了保证安全,必须对焊接工艺试板预拉伸后再进行焊缝力学性能测试,试板中的焊接残余应力会对后续取样以及测试结果产生影响,因此受到关注。本文通过有限元数值模拟结合试验数据,得到焊接试板内的温度及残余应力分布,并模拟了预拉伸对焊接残余应力分布的影响,认为垂直焊缝方向的拉伸,可以有效释放焊接过程中产生的残余应力,并弱化了残余应力分布的不均匀性。
[Abstract]:The strain strengthening technique of austenitic stainless steel can improve the yield strength of the material by producing a certain plastic deformation to save the material. In order to ensure safety, the mechanical properties of welding seam must be tested after pre-stretching of the welding process test plate. The welding residual stress in the test plate will affect the subsequent sampling and test results, so it has been paid attention to. In this paper, the temperature and residual stress distribution in welding plate are obtained by finite element numerical simulation combined with test data, and the influence of pretension on welding residual stress distribution is simulated. The residual stress produced in welding process can be effectively released and the inhomogeneity of residual stress distribution can be weakened.
【作者单位】： 华东理工大学机械与动力工程学院;
【基金】：中央高校基本科研业务费专项资金(222201313014) 国家科技支撑计划(2011BAK06B02-04)
【分类号】：TG404
[Abstract]:The strain strengthening technique of austenitic stainless steel can improve the yield strength of the material by producing a certain plastic deformation to save the material. In order to ensure safety, the mechanical properties of welding seam must be tested after pre-stretching of the welding process test plate. The welding residual stress in the test plate will affect the subsequent sampling and test results, so it has been paid attention to. In this paper, the temperature and residual stress distribution in welding plate are obtained by finite element numerical simulation combined with test data, and the influence of pretension on welding residual stress distribution is simulated. The residual stress produced in welding process can be effectively released and the inhomogeneity of residual stress distribution can be weakened.
【作者单位】： 华东理工大学机械与动力工程学院;
【基金】：中央高校基本科研业务费专项资金(222201313014) 国家科技支撑计划(2011BAK06B02-04)
【分类号】：TG404
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