局部预热对焊接拘束应力的影响  

STUDY ON THE EFFECTS OF LOCAL PREHEATING ON THE WELDING RESTRAINT STRESS

作　　者：侯文考[1] 张文钺[1] 陈邦固[1] 

机构地区：[1]天津大学机械制造工程系

出　　处：《天津大学学报》1992年第4期35-40,共6页Journal of Tianjin University(Science and Technology)

基　　金：国家自然科学基本资金

摘　　要：从分析局部预热产生的焊根间隙变化出发,研究了局部预热下刚性对接接头焊接拘束应力σ_w、附加拘束应力△σ_p的计算方法,讨论了局部预热温度、局部预热宽度的影响,推导了局部预热条件下△_p、σ_w的计算公式。采用国产低合金高强钢验证了公式的精确度。Starting with the change in the groove gap owing to the local preheating, we deal with the additional restraint thermal stress △σ_p and the restraint stress σ_w in the RRC test on local preheating. The effects of local preheating temperature and width have been discussed, and the formulas for calculating the additional restraint thermal stress and the restraint stress σ_w under local preheating have been derived. Furthermore, the accuracy of the formulas was verified with national HSLA steels.

关 键 词：拘束应力 局部预热 焊根间隙 焊接 

分 类 号：TG441.1[金属学及工艺—焊接]