用爆炸法消除焊接残余应力的试验研究

• 作 者: 赵福兴 赖英瑞 姚尧
• 机 构: 西安交通大学,二○四研究所,陕西机械学院,
• 出 处: 机械强度
• 发表日期: 1985年01期
• 关键词: 焊接残余应力 爆炸法 脆断 熔化焊 抗应力腐蚀 局部加热 塑性伸长 屈服极限 弹塑性变形 横向收缩

一、前言构件在不均匀的弹塑性变形过程中,不可避免地要产生内应力——残余应力(或称残留应力)。由于构件的熔化焊接是在局部加热、不均匀冷却的工况下进行的,因而必然会产生焊接残余应力,其值一般高达材料的屈服极限。由于残余应力的存在,致使焊件抗脆断、抗疲劳、抗应力腐蚀等能力大大降抵。这往往是导致焊件破坏的主要原因。

First, the preface In the uneven elastic-plastic deformation process, inevitably have to produce internal stress - residual stress (or residual stress). As the components of the melting welding is in the local heating, uneven cooling conditions, and will inevitably produce welding residual stress, its value is generally up to the yield limit of the material. Due to the existence of residual stress, resulting in weld brittle fracture resistance, fatigue resistance, stress corrosion resistance greatly reduced. This is often the main cause of damage to the weldment.