Debinding and sintering processes of injection molded pure molybdenum

被引：0
|
作者：
Li Kun [1 ]
Tan Zhaoqiang
Hou Haitao
Li Dunxin [1 ]
机构：
[1] Cent S Univ, State Key Lab Power Met, Inst Powder Met, Changsha 410083, Peoples R China
来源：
RARE METAL MATERIALS AND ENGINEERING | 2008年 / 37卷 / 08期
关键词：
pure molybdenum; metal injection molding; thermal debinding; solvent debinding; sintering;
D O I：
暂无
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Debinding and sintering processes of injection molded pure molybdenum were studied. The effect of thermal debinding, solvent-thermal debinding and sintering processes on binder removal efficiency and the content of carbon and oxygen were investigated, meanwhile the microstructure and mechanical properties of sintered product were observed. For n-heptanes solvent debinding, 60% of binder could be extracted at the temperature of 40-50 degrees C after 2 h immersion. The content of carbon in direct thermal debinding parts was higher than that in solvent-thermal debinding parts. The content of carbon and oxygen for both debinding processes were decreased significantly and were respectively less than 0.060% and 0.0042% after sintering under hydrogen atmosphere. It was found that the density of sintered parts increased with sintering temperature until 1850 degrees C and then decreased. The parts sintered at 1850 degrees C for 120 min exhibited a density of 9.70 g/cm(3), tensile strength of 229 MPa and hardness HV10 of 1930 MPa.
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页码：1456 / 1460
页数：5
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