铝与奥氏体不锈钢的炉中钎焊工艺  

Furnace brazing process for aluminum and austenitic stainless steel

作　　者：赵霞[1] 王永东[1] 孙永鑫[2] Zhao Xia Wang Yongdong Sun Yongxin(School of Materials Science ＆ Engineering, Heilongjiang University of Science ＆ Technology, Harbin 150022, China Harbin Institute of Large Electrical Machinery, Harbin 150040, China)

机构地区：[1]黑龙江科技大学材料科学与工程学院,哈尔滨150022 [2]哈尔滨大电机研究所,哈尔滨150040

出　　处：《黑龙江科技大学学报》2016年第6期640-643,共4页Journal of Heilongjiang University of Science And Technology

基　　金：黑龙江省青年科学基金项目(QC2014C064)

摘　　要：为改善铝和不锈钢的焊接接头性能,在奥氏体不锈钢表面预镀覆热浸镀铝层,应用炉中钎焊工艺进行纯铝与奥氏体不锈钢的钎焊。利用扫描电子显微镜和X射线衍射仪检测分析钎焊接头的微观组织,并用万能实验机床测定其剪切性能。结果表明,在实验条件下,选取质量分数40%的钎剂,钎缝间隙值为0.15~0.35 mm,可实现铝与奥氏体不锈钢的炉中钎焊。钎焊接头主要分为钎缝中心区、富铝层、铁铝合金层三个区域。钎缝有Si、α（Al）固溶体、Fe Al2、Fe Al3、Cu Al2相组成。剪切实验结果显示,钎焊接头强度高于铝母材。This paper presents a viable technique luminum and stainless steel. This technique works by for improving the performance of welding joint of a- hot dipping aluminum alloy layer on the surface of austenitic stainless steel and brazing the pure aluminum plate and austenitic stainless steel plate using bra- zing process in a furnace. The technique is validated by analyzing the microstructures of the brazing joints using scanning electron microscope and X-ray diffraction, and measuring the shear properties using a universal testing machine. The results find that brazing the welding joints of the aluminum and austenitic stainless steel can be achieved by the experimental conditions associated with the selection of brazing flux with mass fraction of 40% and brazing seam gap value ranging between 0. 15 mm and 0. 35 ram. The brazing joints consist mainly of three zones： brazing seam center, M-rich layer and Fe-Al layer and brazing joints are comprised of Si, or（Al） solid solution, FeAl2, FeAl3, CuAl2 phase composition. The shear test shows that brazing joints gives a higher strength than aluminum base metal.

关 键 词：炉中钎焊 热浸镀铝 不锈钢 钎焊接头 

分 类 号：TG407[金属学及工艺—焊接]