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填丝TIG焊TA15钛合金与18-8钢接头的微观组织

刘坤,  李亚江,  王娟,  兰亚洲

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文章导航 > 焊接学报  > 2017 >  38(2): 57-60
刘坤, 李亚江, 王娟, 兰亚洲. 填丝TIG焊TA15钛合金与18-8钢接头的微观组织[J]. 焊接学报, 2017, 38(2): 57-60.
引用本文: 刘坤, 李亚江, 王娟, 兰亚洲. 填丝TIG焊TA15钛合金与18-8钢接头的微观组织[J]. 焊接学报, 2017, 38(2): 57-60.
shu
LIU Kun, LI Yajiang, WANG Juan, LAN Yazhou. Microstructure of TA15 alloy and 18-8 stainless steel joint by TIG with filler metal[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2017, 38(2): 57-60.
Citation: LIU Kun, LI Yajiang, WANG Juan, LAN Yazhou. Microstructure of TA15 alloy and 18-8 stainless steel joint by TIG with filler metal[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2017, 38(2): 57-60.
shu

填丝TIG焊TA15钛合金与18-8钢接头的微观组织

  • 山东大学 材料液固结构演变与加工教育部重点实验室, 济南 250061

基金项目: 国家自然科学基金资助项目（51575316）；山东省自然科学基金资助项目（ZE2015EM040）

Microstructure of TA15 alloy and 18-8 stainless steel joint by TIG with filler metal

  • Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University, Jinan 250061, China

  • 摘要: 以铜焊丝为填充材料对TA15钛合金与18-8不锈钢进行填丝钨极氩弧焊（TIG）.利用金相显微镜（OM）、扫描电镜（SEM）、电子探针（EPMA）及显微硬度计对TA15/18-8接头的微观组织、相组成、元素分布及显微硬度进行了分析.结果表明，焊缝组织为铜固溶体枝晶；TA15钛合金侧熔化未混合区为α-Ti与磷化物脆性相Ti3P，Ti（Cu，Fe）的混合组织；18-8不锈钢侧熔合区为Fe-P共晶组织；磷在18-8不锈钢侧熔合区的聚集促进了共晶组织的形成，未参与共晶反应的铜形成团状聚集区；两侧熔合区显微硬度明显高于热影响区和焊缝，Ti3P脆性相导致钛合金侧熔化未混合区的显微硬度最高值达720 HV0.5.
    Abstract: TA15 titanium alloy and 18-8 stainless steel were welded by tungsten inert-gas arc welding with copper alloy as filler metal. Microstructure, phase constituents, elements distribution and microhardness near the fusion zone of TA15 alloy/18-8 stainless steel joint were investigated by optical microscope, scanning electron microscope, electron probe microanalysis and microhardness tester. Results indicated that the molten unmixed zone near TA15 alloy side primarily included α-Ti, brittle phosphide (Ti3P) and Ti(Cu, Fe), while the fusion zone near 18-8 stainless steel was mainly composed of Fe-P eutectic microstructure. The enrichment of P in the fusion zone near 18-8 stainless steel contributed to the forming of eutectic microstructure. The residual Cu formed the clump zone. The microhardness of fusion zones was obviously higher than that of heat affected zone and weld metal. Brittle Ti3P phase resulted in the highest microhardness of molten unmixed zone near titanium alloy reaching 720 HV0.5.
  • [1] Chen Shuhai, Zhang Mingxin, Huang Jihua, et al. Microstructures and mechanical property of laser butt welding of titanium alloy to stainless steel[J]. Materials & Design, 2014, 53:504-511.
    [2] Gao Y, Nakata K, Nagatsuka K, et al. Interface microstructural control by probe length adjustment in friction stir welding of titanium and steel lap joint[J]. Materials & Design, 2015, 65:17-23.
    [3] Yue X, He P, Feng, J C, et al. Microstructure and interfacial reactions of vacuum brazing titanium alloy to stainless steel using an AgCuTi filler metal[J]. Materials Characterization, 2008, 59(12):1721-1727.
    [4] Kundu S,Chatterjee S. Interface microstructure and strength properties of diffusion bonded joints of titanium-Al interlayer-18Cr-8Ni stainless steel[J]. Materials Science and Engineering, 2010, 527(10-11):2714-2719.
    [5] Kundu S, Sam S, Chatterjee S. Interfacial reactions and strength properties in dissimilar titanium alloy/Ni alloy/microduplex stainless steel diffusion bonded joints[J]. Materials Science and Engineering, 2013(560):288-295.
    [6] Wang Ting, Zhang Binggang, Feng Jicai, et al. Effect of a copper filler metal on the microstructure and mechanical properties of electron beam welded titanium-stainless steel joint[J]. Materials Characterization, 2012(73):104-113.
    [7] Akbari Mousavi S A A, Farhadi Sartangi P. Experimental investigation of explosive welding of cp-titanium/AISI 304 stainless steel[J]. Materials & Design, 2009, 30(3):459-468.
    [8] Fazel Najafabadi M, Kashani Bozorg S F, Zarei Hanzaki A. Dissimilar lap joining of 304 stainless steel to CP-Ti employing friction stir welding[J]. Materials & Design, 2011, 32(4):1824-1832.
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  • 收稿日期:  2014-12-22

填丝TIG焊TA15钛合金与18-8钢接头的微观组织

  • 山东大学 材料液固结构演变与加工教育部重点实验室, 济南 250061
    • 基金项目:  国家自然科学基金资助项目（51575316）；山东省自然科学基金资助项目（ZE2015EM040）
  • 收稿日期: 2014-12-22

摘要: 以铜焊丝为填充材料对TA15钛合金与18-8不锈钢进行填丝钨极氩弧焊（TIG）.利用金相显微镜（OM）、扫描电镜（SEM）、电子探针（EPMA）及显微硬度计对TA15/18-8接头的微观组织、相组成、元素分布及显微硬度进行了分析.结果表明，焊缝组织为铜固溶体枝晶；TA15钛合金侧熔化未混合区为α-Ti与磷化物脆性相Ti3P，Ti（Cu，Fe）的混合组织；18-8不锈钢侧熔合区为Fe-P共晶组织；磷在18-8不锈钢侧熔合区的聚集促进了共晶组织的形成，未参与共晶反应的铜形成团状聚集区；两侧熔合区显微硬度明显高于热影响区和焊缝，Ti3P脆性相导致钛合金侧熔化未混合区的显微硬度最高值达720 HV0.5.

English Abstract

刘坤, 李亚江, 王娟, 兰亚洲. 填丝TIG焊TA15钛合金与18-8钢接头的微观组织[J]. 焊接学报, 2017, 38(2): 57-60.
引用本文: 刘坤, 李亚江, 王娟, 兰亚洲. 填丝TIG焊TA15钛合金与18-8钢接头的微观组织[J]. 焊接学报, 2017, 38(2): 57-60.
shu
LIU Kun, LI Yajiang, WANG Juan, LAN Yazhou. Microstructure of TA15 alloy and 18-8 stainless steel joint by TIG with filler metal[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2017, 38(2): 57-60.
Citation: LIU Kun, LI Yajiang, WANG Juan, LAN Yazhou. Microstructure of TA15 alloy and 18-8 stainless steel joint by TIG with filler metal[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2017, 38(2): 57-60.
shu

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