激光——电弧复合焊接头根部特性分析
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摘要
对厚板HQ785T1低合金高强钢填充HS-70焊丝激光—电弧复合焊接头根部化学成分分析及元素线扫描分析,结果表明,焊缝部位主要元素的含量介于母材和焊丝之间,焊缝从上部到根部,随着深度的增加,焊缝元素组成越接近母材,根部焊缝组成以母材成分为主,焊丝成分所占比例较小;焊缝根部冲击韧性低于焊缝上部,增大坡口钝边,焊缝根部的冲击韧性降低;金相显示根部焊缝中心组织为粒状贝氏体组织,随着钝边尺寸的增加,碳化物析出量减少,组织略显粗大,组织脆性增加.
The chemical composition analysis and elemental line scanning analysis of the root of thick plate HQ785 T1 steel laser-arc hybrid welding joint filled with HS-70 were studied, the test results show that the element content of the weld is between the base metal and the welding wire, the element composition of the weld seam is closer to the base metal with the increase of the depth. The composition of the root weld is mainly composed of base metal, the proportion of the welding wire is small; The value of the impact toughness is lower than the upper part of the weld, the impact toughness of the weld root decreases with the increase of the blunt edge of the groove; The microstructure of the weld center of the root is granular bainite structure. With the increase of blunt edge size,the amount of carbide precipitation decreases, the microstructure is slightly coarser, and the brittleness increases.
The chemical composition analysis and elemental line scanning analysis of the root of thick plate HQ785 T1 steel laser-arc hybrid welding joint filled with HS-70 were studied, the test results show that the element content of the weld is between the base metal and the welding wire, the element composition of the weld seam is closer to the base metal with the increase of the depth. The composition of the root weld is mainly composed of base metal, the proportion of the welding wire is small; The value of the impact toughness is lower than the upper part of the weld, the impact toughness of the weld root decreases with the increase of the blunt edge of the groove; The microstructure of the weld center of the root is granular bainite structure. With the increase of blunt edge size,the amount of carbide precipitation decreases, the microstructure is slightly coarser, and the brittleness increases.
引文
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[5]滕彬,李小宇,雷振,等.低合金高强钢激光-电弧复合热源焊接冷裂纹敏感性分析[J].焊接学报,2010,31(11):61-64.Teng Bin,Li Xiaoyu,Lei Zhen,et al.Sensitivity analysis of cold crack in laser-arc hybrid heat source welding of low alloy high strength steel[J].Transactions of the China Welding Institution,2010,31(11):61-64.
[6]王旭友,滕彬,雷振,等.JFE980S高强钢激光-电弧复合热源热模拟试验分析[J].焊接学报,2010,31(11):25-28.Wang Xuyou,Teng Bin,Lei Zhen,et al.Thermal simulation test and analysis of JFE980S high strength steel with laser-arc hybrid heat source[J].Transactions of the China Welding Institution,2010,31(11):25-28.
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[8]Bratt C,Noel J.Laser hybrid welding of advanced high strength steels for potential antomotive applications[J].ICALEO 2004[C]//Orlando:Laser Insti-tute of America,2004:201-210.
[2]李俐群,陈彦宾,陶汪.铝合金双光束焊接特性研究[J].中国激光,2008,35(11):1783-1788.Li Liqun,Chen Yanbin,Tao Wang.Study on the characteristics of double beam welding of aluminum alloy[J].Chinese Journal of Lasers,2008,35(11):1783-1788.
[3]Zeng Huilin,Xu Yuanbin,Wang Changjiang,et al.Research on laser-arc hybrid welding technology for long-distance pipeline construction[J].China Welding,2018,27(3):53-58.
[4]杨海锋,王旭友,王威,等.铝合金双光束焊接过程稳定性分析[J].焊接学报,2016,37(6):13-18.Yang Haifeng,Wang Xuyou,Wang Wei,et al.Process stability analysis of double beam laser welding of aluminum alloy[J].Transactions of the China Welding Institution,2016,37(6):13-18.
[5]滕彬,李小宇,雷振,等.低合金高强钢激光-电弧复合热源焊接冷裂纹敏感性分析[J].焊接学报,2010,31(11):61-64.Teng Bin,Li Xiaoyu,Lei Zhen,et al.Sensitivity analysis of cold crack in laser-arc hybrid heat source welding of low alloy high strength steel[J].Transactions of the China Welding Institution,2010,31(11):61-64.
[6]王旭友,滕彬,雷振,等.JFE980S高强钢激光-电弧复合热源热模拟试验分析[J].焊接学报,2010,31(11):25-28.Wang Xuyou,Teng Bin,Lei Zhen,et al.Thermal simulation test and analysis of JFE980S high strength steel with laser-arc hybrid heat source[J].Transactions of the China Welding Institution,2010,31(11):25-28.
[7]林尚扬,关桥.我国制造业焊接生产现状与发展战略研究[R].中国工程院咨询项目总结报告,2003.
[8]Bratt C,Noel J.Laser hybrid welding of advanced high strength steels for potential antomotive applications[J].ICALEO 2004[C]//Orlando:Laser Insti-tute of America,2004:201-210.