摘要
采用超音速微粒轰击(Supersonic Particles Bombarding)技术对0Cr18Ni9Ti不锈钢和16MnR低合金钢焊接接头表面进行处理,利用金相显微镜和透射电镜对材料表层结构进行表征,并测量了处理后焊接接头表层硬度、拉伸性能、弯曲性能和残余应力。结果表明:经超音速微粒轰击处理可以在焊接接头表层形成尺寸均匀的纳米晶组织,而且纳米化结构表层的硬度远高于心部,材料的抗拉强度和屈服强度均有提高。
A nano-crystalline surface layer was fabricated on 0Crl8Ni9Ti stainless steel and 16MnR low alloy steel welded joint by a supersonic particles bombarding (SSPB) technology. The surface structure of the material surface was analyzed by means of metalloscope and transmission electron microscope (TEM). Several methods, such as TEM, metalloscope, etc. were used to test surface hardness, tensile strength, bend strength and residual stress. Experimental results show that after the SSPB treatment for a short period, the nano-crystal structure was formod in the surface layer of welded joint, and its hardness of surface was much higher than that in core, and the ultimate strength and yield strength were improved significantly.
出处
《焊接》
北大核心
2007年第3期35-38,共4页
Welding & Joining
关键词
超音速微粒轰击
表面纳米化
力学性能
supersonic particles bombarding, surface nano-crystallization, mechanical properties
