The State Key Laboratory of Rolling and Automation of Northeastern University, 110004
Mold Decomposed injection sculpturing (Mold DIS) process which integrates injection and sculpturing in layered manufacture is a novel rapid prototyping technique. In this paper a wax mold is fabricated through DIS process, the 316L stainless steel slurry is then cast into the mold. After curing and drying, the wax mold is melted and the green part is obtained. The purpose of this paper is to study the process of sintering and infiltration of the green part especially which have fine features. Firstly, the solid state sintering was investigated using taguchi experiments. The result shows that sintering temperature gives more effect on the final density than heating rate and holding time.However, when high temperature sintering is adopted, complex shape parts can not be formed without flaws due to the excess shrinkage. Then, copper-infiltration is used to reduce shrinkage and improve mechanical properties. A new infiltration process, named “short-time high-temperature infiltration, is utilized to form the thin-walled structure. It shows that sintered sample with shrinkage rate of 5.02%, density of 7.56 g/cm3, bend strength of 336.4MPa and hardness of HV189 is obtained through “short-time high-temperature copper-infiltration at 1380℃ in vacuum. Finally, a part whose feature size range from 1.6mm to 45mm and a part with complex internal structure are formed without obvious defects.
Kaiyong Jiang Fei Wang Jianwei Zhang
College of Mechanical Engineering and Automation, Huaqiao University, Xiamen 361021,China College of Mechanical Engineering and Automation, Huaqiao University, Xiamen 361021, China
国际会议
桂林
英文
1-29
2010-11-16（万方平台首次上网日期，不代表论文的发表时间）