低碳贝氏体高强钢焊接接头的组织与拉伸性能
Microstructure and Tensile Properties of Welded Joints of Low-Carbon Bainitic High Strength Steel
摘 要
采用金属极活性气体保护焊(MAG)和钨极惰性气体保护焊(TIG)焊接工艺对铌铬钼钒系低碳贝氏体高强钢进行焊接, 在不同温度下对焊接接头进行拉伸试验, 并对接头焊缝组织及拉伸断口进行观察; 应用有限元软件ABAQUS模拟了MAG焊接接头在不同温度下的拉伸载荷-位移曲线。结果表明: 该低碳贝氏体高强钢焊缝的显微组织主要由板条贝氏体和M/A岛组成; 在-196~20 ℃温度范围内, 两种焊接接头的强度均随温度的降低而升高; TIG焊接接头的拉伸断口以韧窝为主, MAG焊接接头在-110 ℃时发生脆断; 模拟得到的载荷-位移曲线与试验曲线吻合良好。
焊接接头
MAG
TIG
拉伸性能
low-carbon bainitic high strength steel
weld joint
metal active-gas welding (MAG)
tungsten inert gas welding (TIG)
tensile property
Abstract
Metal active-gas welding (MAG) and tungsten inert gas welding (TIG) were used to weld NiCrMoV series of low-carbon bainitic high strength steel. Tensile tests were performed for two welded joints at different temperatures, and microstructure and tensile fracture of the joints were observed. The load-displacement curves of MAG joint were simulated by finite element software ABAQUS at different temperatures. The results show that the microstructure of welded seam of the low-carbon bainitic high strength steels was mainly composed of lath-like bainite and M/A constituent. In the range of -196 ℃ to 20 ℃, the strength of both welded joints gradually increased with the decrease of temperature. At -110 ℃, ductile fracture controlled the tensile fracture of TIG joint, however brittle fracture controlled the tensile fracture of MAG joint. The simulated load-displacement curves were consistent with the experimental ones.
中图分类号 TG407
所属栏目 物理模拟与数值模拟
基金项目 国家自然科学基金资助项目(50905081, 50671047); 国家高科技研究发展计划资助项目(2006AA03206)
收稿日期 2012/3/15
修改稿日期 2012/11/15
网络出版日期
作者单位点击查看
备注宋洁(1986-), 女, 河北石家庄人, 硕士研究生。
引用该论文: SONG Jie,WANG Zhe,CAO Rui,ZHANG Xiao-bo,PENG Yun,DU Wan-sheng,TIAN Zhi-ling,CHEN Jian-hong. Microstructure and Tensile Properties of Welded Joints of Low-Carbon Bainitic High Strength Steel[J]. Materials for mechancial engineering, 2013, 37(4): 87～92
宋洁,王哲,曹睿,张晓波,彭云,杜挽生,田志凌,陈剑虹. 低碳贝氏体高强钢焊接接头的组织与拉伸性能[J]. 机械工程材料, 2013, 37(4): 87～92
被引情况:
【1】肖轶,方建慧,钟庆东,刘卫东, "t8/5对高强度余热处理棒材焊接热影响区组织和力学性能的影响",机械工程材料 38, 99-103(2014)
【2】李继红,陈阳阳,任晓龙,张敏, "超低碳贝氏体钢埋弧焊焊缝金属的组织与力学性能",机械工程材料 40, 43-46(2016)
【3】隋志强,齐彦昌,王军丽,马成勇, "焊接工艺对DH36耐蚀船板钢焊缝金属组织与耐蚀性能的影响",机械工程材料 40, 61-65(2016)
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【4】闫英杰, 曹睿, 杜挽生, 等.一种新型980MPa高强钢在不同温度下的拉伸断裂试验[J].材料科学与工程学报, 2009(2): 246-249.
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【7】IKAWA H, OSHIGE H, TANOUE T. Effect of martensite-austenite constituent on HAZ toughness of a high strength steel[J].International Institute of Welding Document, 1980, 11(2): 87-96.
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【9】孙慧敏, 王国珍, 轩福贞, 等. 焊接接头延性裂纹扩展的数值模拟[J].焊接学报, 2010, 31(8): 105-112.
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