权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

A Stydy on Residual Stress of Exploxive Clad Steel

爆炸复合钢残余应力的研究

基本信息

批准号：
60550528
负责人：
NISHIDA Minoru
金额：
$ 1.09万
依托单位：
Ehime University
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1985
资助国家：
日本
起止时间：
1985 至 1987
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-60550528/
关键词：
Explosive Clad Steel Resisual Stress Instantaneous Heaing in Bonded Zone Stainless Steel Welded Joint Post Weld Heating and Cooling Treatment 溶接継手残留応力軽減法加熱・冷却併用処理

项目摘要

1. The residual stresses across thickness of carbon steel(SPHC) and austenite stainless steel (SUS304) explosive clad steel are measured by mean of thin layers meathod.(1) For SPHC explosive clad steel. The biaxial resibual strosses across the thickpess exhibit max. tension in the bonded zone and compression in the other zone.(2) For SUS304 explosive clad steel. The biaxial residucal stresses across the thickness exhibit compression in the surface layer of SUS304, max. tension in the bonded zone, compression in the interior of carbon steel and tension in the surface layer of carbon steel. The heat treatment such as annealing at 550゜C hase little effet on the relief of residual stress and the max.residual stress in SUS304 increasos with an increase in the tensile cold working.2. We adopted a new method in order to relieve residual stress in SUS304 welded joint. This method is such a one as the weld metal is rapidly cooled to -100゜C by high pressure liquid nitrogen and at the same time the base metal is heated to a temperature below 200 ゜C by Propane gas-Oxygen flame. By this post weld heating and cooling treatment, the tensile residual stresses of weld metal and HAZ in welded joint are decreased from level 500-400 MPa in case of as welded condition to level of 100 MPa.

1.用薄层法测量了碳钢（SPHC）和奥氏体不锈钢（SUS 304）爆炸复合钢的残余应力。(1)用于SPHC爆炸复合钢。沿厚度方向的双轴向残余应力最大。在粘结区中的张力和在另一个区中的压缩。(2)适用于SUS 304爆炸复合钢。双轴残余应力沿厚度方向在SUS 304表面层表现为压缩，最大。粘结区的拉伸、碳钢内部的压缩和碳钢表面层的拉伸。550 ℃退火等热处理对残余应力的消除作用不大，SUS 304合金的最大残余应力随拉伸冷加工量的增加而增加.为了消除SUS 304焊接接头的残余应力，采用了一种新的方法。这种方法是用高压液氮将焊缝金属迅速冷却到-100 ℃，同时用丙烷气-氧火焰将母材加热到200 ℃以下。通过这种焊后加热和冷却处理，焊接接头中焊缝金属和HAZ的拉伸残余应力从焊接状态下的500-400 MPa水平降低到100 MPa水平。