应用示波冲击法研究Q960钢焊接热模拟冲击韧性  

The Study on Impact Toughness of Q960 Steel in Welding Thermal Simulation Test by Means of Instrumented Impact Method

作　　者：隋轶[1] 韩严法[1] 傅博[1] 胡奉雅 刘芳芳[1] 蒋健博[1] Sui Yi;Han Yanfa;Fu Bo;Hu Fengya;Liu Fangfang;Jiang Jianbo(Anshan Iron and Steel Co.,Ltd)

机构地区：[1]鞍钢股份有限公司

出　　处：《宽厚板》2018年第3期1-4,共4页Wide and Heavy Plate

摘　　要：利用示波冲击方法对Q960钢的焊接热模拟冲击韧性展开研究。对不同热输入下峰值温度分别为1 300℃、1 100℃和850℃的焊接热模拟试样进行了示波冲击和组织检验。结果表明:峰值温度为1 300℃时,热模拟试样的组织以马氏体为主,峰值温度为1 100℃和850℃时,热模拟试样的组织以贝氏体为主;峰值温度为1 300℃时,热模拟试样的裂纹扩展功Wp随焊接热输入的增加先升高后降低,峰值温度为1 100℃和850℃时,热模拟试样的裂纹扩展功Wp随焊接热输入的增加呈现降低的趋势。Impact toughness of Q960 steel in welding thermal simulation test is studied by means of instrumented impact method. Instrumented impact and microstructure test are performed on welding thermal simulation specimen at peak temperatures of 1 300 ℃,1 100 ℃ and 850 ℃ under different welding heat input. The results show that the microstructure of thermal simulation specimen mainly consists of martensite when the peak temperature is 1 300 ℃,the microstructure of thermal simulation specimen mainly consists of bainite when the peak temperature is 1 100 ℃ and 850℃. The crack propagation energy Wp of thermal simulation specimen first increases and then decreases with increase of welding heat input when the peak temperature is 1 300 ℃,while the crack propagation energy Wp of thermal simulation specimen decreases with increase of welding heat input when the peak temperature is 1 100 ℃ and 850 ℃.

关 键 词：Q960 焊接热模拟 裂纹扩展功 示波冲击 

分 类 号：TG457.11[金属学及工艺—焊接]