粉末冶金技术2012，Vol.30Issue(4)：293-299,7.
TiH2粉末注射成形坯烧结工艺研究
Study of sintering processes for powder injection molding of TiH2
摘要
Abstract
With low-cost TiH2 powders as raw material to fabricate pure titanium, the effects of sintering parameters such as sintering temperature, sintering time and sintering atmosphere on the densifieation and microstracture of as-sintered titanium products were investigated systemically, and mechanical properties of the samples by vacuum sintering were tested. The results show that full density titanium products can be manufactured with TiH2 powders by MIM. With sintering temperature and time increasing, the porosity reduces and the density increases clearly. The relative density sintered at 1 150℃ for 3h is 93. 88% and the relative density sintered at 1 300℃ for 3h is 98. 52% . When sintering at 1 300℃ for 2h , the relative density is 96. 69%. Sintering atmosphere has an obvious effect on the properties of the sample. The relative density is the highest, grain size is also the biggest, but the contents of carbon and oxygen are the lowest under the vacuum condition. The samples sintered at 5 X 10-3 Pa and 1 300℃ in vacuum atmosphere for 3h have hardness of 388HV, tensile strength of 325MPa and elongation of 4. 43%.关键词
氢化钛/金属粉末注射成形/烧结/纯钛Key words
TiH2/ metal injection molding/ sintering/ pure titanium引用本文复制引用
张小虎,肖平安,刘素红,周威..TiH2粉末注射成形坯烧结工艺研究[J].粉末冶金技术,2012,30(4):293-299,7.基金项目
国家自然科学基金资助项目(50674044,51074070) （50674044,51074070）
