金属粉末注射成形钛合金工艺研究

为了探究保障最终产品性能满足ASTM标准的粉末注射成形工艺,本文采用金属粉末注射成形方法,以德国Basf公司提供的喂料为原料,通过对注射参数优化获取1组最优注射工艺参数,用于后续脱脂及烧结工艺.利用拉伸、弯曲等力学实验,扫描电镜、金相光学显微镜等表征方法对材料的力学性能及微观结构进行表征,研究了注射、脱脂和烧结工艺参数...

Research on the technology of metal powder injection molding of titanium alloy

In order to study the powder injection molding process that make the final product properties meet ASTM standards,the method of metal powder injection molding was used in this paper,and the feedstock provided by BASF Corporation,Germany was used as raw material.By optimizing the injection parameters,the optimal injection parameters were obtained for the debinding and sintering processes subsequently.The mechanical properties and microstructure of the materials were characterized by tensile and bending experiments,scanning electron microscopy(SEM),metallographic optical microscopy(MS)and other testing methods.The results showed that the yield strength,ultimate tensile strength,elongation and relative density of the sintered parts were 882 MPa,971 MPa,8.21%and 98%,respectively,under the sintering condition at 1350℃for 4 hours.The microstructure of the sintered sample showed that phase transition occurred in the sintering process,and the widmanstatten containing thick lamellar colonies was obtained,thus having higher strength and slightly lower plasticity.