SiCp/101铝基复合材料TIG焊研究  

TIG Welding for SiCp/101 Aluminum Matrix Composite

作　　者：冀国娟[1] 谢建刚[1] 薛文涛[1] 牛济泰[2] 

机构地区：[1]北京矿冶研究总院金属材料所,北京100044 [2]1哈尔滨工业大学材料科学与工程学院,哈尔滨150001

出　　处：《有色金属》2003年第3期1-4,共4页Nonferrous Metals

摘　　要：研究SiCp/10 1铝基复合材料TIG法焊接。研究表明 ,接头强度的主要影响因素是焊接热输入影响熔池流动性和界面反应。热输入小 ,熔池温度低 ,流动性差 ,气孔多 ,未熔合明显 ,但界面反应程度较小。当热输入较小时 ,熔池流动性因素对接头强度的影响较大 ,随焊接电流升高 ,接头强度表现出升高的趋势。热输入大 ,熔池温度高 ,流动性好 ,气孔、未熔合等缺陷较少 ,但界面反应剧烈。当热输入增大到一定程度时 ,继续增大热输入对接头带来有害影响 ,此时随焊接电流增大 ,界面反应加剧 ,生成大量有害相Al4 C3。TIG welding process of SiCp/101 aluminum matrix composite is investigated. The results show that the main influencing factors of TIG welding joint strength of the SiCp/101 aluminum matrix composite are the fluidity of molten pool and the interface reaction, which relate to the heat input. While the heat input is low, the temperature and fluidity of the molten pool are low, and the pores and incomplete fusion are obvious, but the interface reaction is weak. In the condition of the low heat input, the influence of the fluidity of molten pool is dominant, and the joint strength is in the trends of increase with the increase of welding current. While the heat input is high, the temperature and fluidity of the molten pool are high, and the pores and incomplete fusion are reduced, but the interface reaction is strong. If the heat input is great enough, much harmful phase Al 4C 3 is formed with the increase of the heat input, so the strength of the TIG welding joint is decreased.

关 键 词：硅化碳/铝基复合材料 TIG焊 熔池流动性 界面反应 焊接接头 

分 类 号：TG457[金属学及工艺—焊接] TG444.7