焊管Issue(11)：23-26,4.
ASTM4130钢焊接冷裂纹敏感性分析
Analysis on Cold Crack Sensitivity of ASTM4130 Steel
摘要
Abstract
The cold crack sensitivity and fracture characteristics of ASTM4130 steel were investigated using implant test under the condition of shielded metal arc welding. The results showed that the critical failure stress is 344.46 MPa, 642.55 MPa and 806.11 MPa corresponding to no preheating, preheating temperature of 100℃and 200℃respectively. Without preheating and preheat to 100℃, the fracture is with the typical characteristics of brittle fracture;When the preheating temperature is 200℃, the fracture presents dimple fracture. The coarse grain zone organization mainly consists of martensite and bainite, with the preheating temperature increasing, the content of martensite decreases while the content of bainite increases. It is concluded that the cold crack sensitivity of ASTM4130 steel is closely related to the presence of the non-equilibrium microstructure in coarse grain zone.关键词
焊接/ASTM4130钢/插销试验/冷裂纹Key words
welding/ASTM4130 steel/implant test/cold crack分类
矿业与冶金引用本文复制引用
张三艳,李立英..ASTM4130钢焊接冷裂纹敏感性分析[J].焊管,2014,(11):23-26,4.基金项目
山东省自然科学基金（ZR2013EEQ027）；中央高校基本科研业务费专项资金（14CX02066A）。 （）
