钛合金粉末注射成形溶剂脱脂工艺研究  

Research on Solvent Debinding Process of Titanium Alloy Compacts by Metal Injection Molding

作　　者：郭世柏[1] 张厚安[1] 张荣发[2] 段柏华[3] 秦明礼[3] 何新波[3] 曲选辉[3] 

机构地区：[1]湖南科技大学机电工程学院,湖南湘潭411201 [2]江西科技师范学院材料表面工程重点实验室,江西南昌330013 [3]北京科技大学材料科学与工程学院,北京100083

出　　处：《稀有金属材料与工程》2007年第3期537-540,共4页Rare Metal Materials and Engineering

基　　金：国家"973"计划(TG2000067203)项目资助

摘　　要：采用粉末注射成形方法制备了钛合金坯体,然后利用溶剂脱脂方法脱除坯体中可溶性粘结剂。通过对溶剂脱脂动力学分析表明,在脱脂过程中,存在动力学控制步骤转化的过程,提出了脱脂临界厚度的概念。当厚度超过5mm时,试样脱脂过程受扩散控制,在常温下进行溶剂脱脂时,其扩散系数为1.86×10-6cm2.s-1,活化能为12.96kJ.mol-1.K-1;在厚度小于5mm时,试样脱脂过程受粘结剂溶解和扩散混合控制。Titanium alloy compacts were prepared by metal injection molding. Solvent debinding process could remove dissoluble binder in the compacts. By analyzing the kinetics of the solvent debinding, shifting of different controlling mechanism was found in the debinding process. The definition of critical thickness was put forward. The solvent debinding process was controlled by diffusion for the sample with a thickness of more than 5mm. The diffusion coefficient is 1.83 × 10^-6 cm^2.s^-1 at room temperature and the diffusion active energy is 12.96 kJ.mol^-1.K^-1. When thickness of the samples is less than 5mm, the solvent debinding process is controlled both by diffusion and solvent dissolution of the binder.

关 键 词：钛合金 粉末注射成形 溶剂脱脂动力学 溶剂脱脂厚度 

分 类 号：TF124[冶金工程—粉末冶金]