压力管道在役焊接热循环试验研究  

Experimental Study on Weld Thermal Cycle of In-service Welding of Pressurized Pipelines

作　　者：顾国林[1] 薄国公[1] 齐万鹏[1] 王勇[2] 韩涛 

机构地区：[1]中国石油天然气管道工程有限公司,河北廊坊065000 [2]中国石油大学机电工程学院,山东青岛266580

出　　处：《压力容器》2012年第12期32-36,共5页Pressure Vessel Technology

基　　金：国家自然科学基金项目(51074174);山东省自然科学基金项目(ZR2010EM041)

摘　　要：利用平板腔室模拟试验装置以及圆管模拟试验装置,对16MnR钢进行了在役焊接热循环研究。结果表明,与水冷条件下相比,空冷时在役焊接热循环曲线峰值温度提高,冷却时间延长;随着焊接热输入的增大,峰值温度和冷却时间明显增加;小于临界板厚时,冷却时间随着板厚的增大而减小,试板的冷却速度增大;而超过临界板厚,板厚对冷却时间的影响可以忽略;压力因素对静试验装置的在役焊接热循环的影响可以忽略。An in- service welding experiment, study on the thermal cycle by in- service welding 16MnR steel in different welding conditions, was carried out based on self - made static simulated test equipment. The results show that the peak temperature is higher and the cooling time is longer in air cooling condition than in water cooling condition. The peak temperature elevates and the cooling time obviously extends with the increase of welding heat input. Less than the critical thickness, the cooling time shortens when the slab thickness increases. No less than the critical thickness, the slab thickness has no effect on the cooling time. Internal pressure has no significant influence on thermal cycle curve when using the static device.

关 键 词：在役焊接 16MNR钢 热循环 试验研究 

分 类 号：TH131.2[机械工程—机械制造及自动化] TG402[金属学及工艺—焊接]