Fabrication of Bimetal Joints by Spark Plasma Sintering
We have reported one-step fabrication of bimetal joints consisting of M42 powder metallurgy high speed steel (P/M HSS) and 45 steel (M42/45) via spark plasma sintering (SPS) technique. The microstructures of joint interfaces were characterized and the mechanical properties were measured. It is found that fabrication of M42/45 joints could be accomplished via spark plasma sintering at 970℃ and 70MPa for 10min. The as-fabricated M42 P/M HSS, which plays as the working parts of the bimetal, exhibits the uniform microstructure with fine grain size and without carbide segregation. Its Rockwell hardness reaches 67.36 HRC after heat treatments of quenching at 1180℃ for 5 min and ternary tempering at 550 ℃ for 1 hr, which is much higher than that of conventional sintered ones. The tensile strength of the bimetal joint is up to 550MPa, which can be attributed to the sound interface with few defects obtained by the spark plasma sintering. Current work might provide a facile and useful method for fabrication of bimetal joints with high quality, which could benefit the fabrication of composites to save the cost of metals acting as working parts.
Multi-materials Spark Plasma Sintering Powder Metallurgy
XU Jin-fu WEN Xiao-hao DING Xiao-qin HAN Xiao-yun ZHANG Xue-bin
Research Institute of Material and Technology,Ningbo University of Technology,Ningbo,China Institute Institute of Materials Science and Engineering,East China University of Science and Technology,Shang Institute of Materials Science and Engineering, East China University of Science and Technology,Shan Ningbo Supervision and Inspection Institute of Product Quality,Ningbo,China
国际会议
The Fourth Asian Conference on Heat Treatment and Surface Engineering(第四届亚洲热处理及表面工程大会)
北京
英文
235-240
2009-10-27（万方平台首次上网日期，不代表论文的发表时间）