(中国船舶重工集团公司,洛阳 471039)
摘 要: 采用不同铁含量的焊丝进行焊接实验,并进行显微组织、硬度、拉伸、冲击、冷弯及耐海水腐蚀等一系列测试,研究铁元素对焊缝组织和性能的影响。结果表明:铁元素会在焊缝中形成片层状两相组织,该区域显微硬度高于基体的约100 HV。2%(质量分数)以下的铁元素不会在焊缝中形成TiFe相化合物,焊缝耐海水腐蚀性能优异,通过合理设计焊丝成分可以达到较好的焊缝性能匹配。
关键字: 船用钛合金;焊缝;铁元素
of titanium alloy welding seam
(Luoyang Ship Materials Research Institute, Luoyang 4710391, China)
Abstract:Some welding experiments were designed with different Fe contents of welding wire, and a series of tests on the microstructure, hardness, tensile, impact, cold bend, seawater corrosion resistance were carried out to study the effect of Fe element on the microstructure and properties of welding seam. The results show that the two-phase lamellar structure forms in the welling area, and the hardness of this area is about 100 HV higher than that of the base material. TiFe phase will not be formed at 2%(mass fraction) Fe; the welding seam shows an excellent corrosion resistance in seawater. Through a rational design of welding material, better performance of weld seam can be achieved.
Key words: marine titanium alloy; welding seam; Fe