X80管线钢自动焊焊缝冲击能量分配研究  

Study of weld impact energy distribution for X80 pipe automatic welding

作　　者：韩涛 温晓峰 刘宇 尹长华 王金环 HAN Tao;WEN Xiaofeng;LIU Yu;YIN Zhanghua;WANG Jinhuan(China Petroleum Pipeline Research Institute Co.,Ltd.,Langfang 065000,China;PipeChina North Pipeline Co.,Ltd.,Langfang 065000,China)

机构地区：[1]中国石油天然气管道科学研究院有限公司,河北廊坊065000 [2]国家管网集团北方管道有限责任公司,河北廊坊065000

出　　处：《压力容器》2024年第6期30-35,共6页Pressure Vessel Technology

摘　　要：针对X80管线钢实心焊丝自动焊的焊缝金属,采用仪器化冲击试验方法,研究了焊缝金属冲击能量分配和温度敏感性。结果表明,工程常用测试温度(-10℃)条件下,X80管道实心焊丝自动焊的焊缝金属冲击韧性(128~195 J)良好;总冲击吸收能量数据波动显著大于裂纹形成能量,主要原因是裂纹扩展过程吸收能量波动较大引起的;系列温度冲击试验的总吸收能量和裂纹形成能量均具有上平台特征,但裂纹形成能量数据曲线的上平台温度范围(-40~20℃)更大,且随着试验温度升高,裂纹形成能量占比表现出非线性降低特性。长输管道工程设计温度范围(-40~20℃)内,焊缝金属裂纹形成能量测试结果具有温度无关性特征,依据上平台温度试验结果制定验收指标,可能不利于对焊缝金属裂纹萌生的控制,建议进一步开展相关研究,制定焊缝金属起裂韧性指标,从根本上控制焊缝金属裂纹的萌生。The impact energy distribution and temperature sensitivity of the weld metal were studied using the instrumented impact test method for the automatic weld metal using solid wire for X80 pipe steel.The research results show that the automatic weld metal using solid wire for X80 pipe has good impact toughness(128~195 J)under the condition of common test temperature(-10℃)in engineering.The fluctuation of the total shock absorption energy data is significantly greater than the crack formation energy.It is mainly caused by large fluctuations in the absorption energy during crack propagation;Through a series of temperature tests,it is found that the total absorption energy and crack formation energy have the characteristics of the upper platform,but the upper platform temperature range(-40~20℃)of cracks form energy data curves is larger.With the increase of the test temperature,the proportion of crack formation energy shows a nonlinear decrease in the proportion of crack formation energy.In the design temperature range of long-distance pipeline engineering(-40~20℃),the weld metal crack formation energy test results have temperature-independent characteristics,and the acceptance index is formulated according to the temperature test results of the upper platform,which may not be conducive to the control of weld metal crack initiation.It is suggested that further relevant research should be carried out to formulate the crack toughness index of weld metal,so as to fundamentally control the initiation of weld metal cracks.

关 键 词：X80管线钢 实芯焊丝 自动焊 焊缝金属 仪器化冲击试验 能量分配 

分 类 号：TH142[一般工业技术—材料科学与工程] TQ055.8[机械工程—机械制造及自动化] TG113.26[化学工程]