高硼Fe-Ti-B合金焊件微观结构和力学性能（英文）  

Microstructure and Mechanical Properties for TIG Welding Joint of High Boron Fe-Ti-B Alloy

作　　者：何林[1] 刘颖[1,2] 李军[1,2] 李兵红[1] 

机构地区：[1]四川大学,四川成都610065 [2]先进特种材料及制备加工技术教育部重点实验室,四川成都610065

出　　处：《稀有金属材料与工程》2014年第2期283-286,共4页Rare Metal Materials and Engineering

基　　金：the Financial Supports Provided by the Fundamental Research Funds for the Central Universities(NCET-04873)

摘　　要：采用钨极气体保护焊,以基体金属作为焊接填料,可以成功实现对高硼Fe-Ti-B合金的焊接。对焊件的微观结构进行了分析,研究表明,高硼Fe-Ti-B合金的焊接质量良好,焊接接头处不存在裂纹、未熔合、未焊透等缺陷;熔合区和热影响区的微观结构与基体明显不同,但能谱分析表明其化学成分非常均匀。对焊件进行了力学性能测试。测试结果表明,相对于基体材料,焊件的屈服强度略有升高,但抗拉强度降低。尽管如此,焊后高硼Fe-Ti-B合金的抗拉强度高于580 MPa,屈服强度高于400 MPa,焊件的力学性能已达到一个较高的水平。The hot rolled plates of high boron Fe-Ti-B alloys were bntt-welded by gas tungsten arc welding （TIG） using base metal as the filler. The microstruetures of the TIG weld joints were analyzed. The results indicate that the welding quality of the high boron Fe-Ti-B alloys is very good, there are no obvious defects such as cracks, lack of fusion, incomplete penetration and strip defects in the butt weld joints. The microstructures of the weld metal and the heat affected zone are different from that of the base metal significantly. However, the micro-zone composition analysis indicates that the composition of the TIG weld joint is very uniform. Tensile tests were carried out on TIG welded joints after the post weld heat-treatment. The result shows that the welds have slightly higher yield strength （YS）, and lower ultimate tensile strength compared to those of the base metal. However, the tensile properties reach a high level. The tensile strength of the high boron Fe-Ti-B alloys is higher than 580 MPa, and the yield strength is higher than 400 MPa.

关 键 词：高硼Fe-Ti-B合金 钨极气体保护焊 微观结构 力学性能 

分 类 号：TG444.72[金属学及工艺—焊接]