Ca-Ni-Ti-Bi多元微合金化铸铁同质气焊丝的焊接性能研究
Ca-Ni-Ti-Bi다원미합금화주철동질기한사적한접성능연구
Research on Welding Quality about Ca-Ni-Ti-Bi Multi-alloying Cast Iron Torch Homogeneous Welding Rods