摘要
以钛粉、铝粉和铬粉为原料,采用机械合金化放电等离子烧结技术制备了TiAl基合金,分析了球磨时间和烧结温度对其物相组成、显微组织以及硬度的影响;用SiC砂轮为对偶件对TiAl基合金的摩擦磨损性能进行了研究。结果表明:混合粉经150 h球磨,1173 K烧结9 min后所制备的合金具有较好的性能,其显微组织均匀细小,平均晶粒尺寸小于10μm,硬度达到68.2 HRC;与304不锈钢相比,烧结TiAl基合金具有更低的摩擦因数和更高的耐磨性,磨损机理为磨粒磨损。
TEAl based alloy was prepared by mechanical alloying（MA） and sparking plasma sintering（SPS） method using Ti, Al and Cr powders as raw material. The effects of milling time and sintering temperature on the phase composition, microstructure and hardness of the sintered alloy were analyzed. Abrasion test with SiC grinding wheel as matching part was carried out to investigate the tribological properties of the sintered alloy. The results show that the TiAl based alloy obtained by powder milling for 150 h and sintering at 1 173 K for 9 rain had good properties, with average grain size of less than 10 μn and high hardness of 68. 2 HRC. Compared with 304 stainless steel, the sintered TiAl based alloy had lower friction coefficient and better wear resistance, and the abrasion mechanism was abrasive wear.
出处
《机械工程材料》
CAS
CSCD
北大核心
2009年第3期27-30,共4页
Materials For Mechanical Engineering
基金
国家自然科学基金资助项目(50575034)
