Ti/TiH<sub>2</sub>注射成形的催化脱脂及烧结工艺

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Abstract In order to solve the problem of titanium processing and reduce the processing cost, cheap TiH₂ powders were mixed with spherical titanium powders with different mass proportions to form Ti/TiH₂ composite titanium powders, which were mixed with polyoxymethylene-based binder for catalytic debiuding and sintering process of metal injection molding. In the research of catalytic debinding process, by comparing the debinding rate of the four groups of injection blanks at different debinding temperatures and time, it was determined that the optimal catalytic debinding temperature was 120 ℃ and the best debinding time was 5 hours. Under these conditions, the debinding rate of the four groups of injection blanks all exceeded 85%, reaching the expected catalytic debinding target. In the sintering process research, the shrinkage, density and tensile strength of the four groups of debinding blanks at different sintering temperatures were studied, and the optimal sintering temperature was 1 250 ℃. Under the sintering condition of 1 250 ℃ for 2 h, with the increase of the proportion of TiH₂, the comprehensive mechanical properties of the sintered samples decrease. The sintered sample with Ti and TiH₂ mass proportions of 4:1 has good comprehensive mechanical properties, with a tensile strength of 649 MPa, a hardness of 241 HV, and an elongation of 6.9%. The TiH₂ powder can effectively reduce costs, and has a good industrial application prospect. It is of great significance to the wide application of titanium and titanium alloys.

Key words： metal injection molding titanium titanium hydride catalytic debinding sintering

Received: 14 April 2021 Published: 26 September 2021

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	YAO Yincheng
	QIU Yaohong
	XIAO Zhiyu

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YAO Yincheng,QIU Yaohong,XIAO Zhiyu. Catalytic debinding and sintering process of metal injection molding used by Ti/TiH₂[J]. Materials Science and Engineering of Powder Metallurgy, 2021, 26(4): 355-362.

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http://pmbjb.csu.edu.cn/EN/ OR http://pmbjb.csu.edu.cn/EN/Y2021/V26/I4/355

[1] CUI C, HU B M, ZHAO L, et al.Titanium alloy production technology, market prospects and industry development[J]. Materials & Design, 2011, 32(3):1684-1691.
[2] LEYENS C, PETERS M.Titanium and Titanium Alloys[M]. Chemical Industry Press: Germany, 2005: 1-30.
[3] DEHGHAN-MANSHADI A, BERMINGHAM M, DARGUSCH M S, et al.Metal Injection moulding of titanium and titanium alloys: Challenges and recent development[J]. Powder Technology, 2017, 319: 289-301.
[4] FROES F.Advances in titanium metal injection molding[J]. Powder Metallurgy & Metal Ceramics, 2007, 46(5/6): 303-310.
[5] GERMAN R M, HENS K H.Identification of the effects of key powder characteristics on powder injection moulding[J]. Metal Powder Report, 1992, 47(10): 55-62.
[6] 李永, 王兴庆, 韩义林. 粉末注射成形石蜡基成形剂的脱除工艺[J]. 粉末冶金材料科学与工程, 2011(01): 150-154.
LI Yong, WANG Xingqing, HAN Yilin.Technique of debinding wax-based binder for powder injection molding[J]. Materials Science and Engineering of Powder Metallurgy, 2011(1): 150-154.
[7] 郭世柏, 曲选辉. 金属注射成形粘结剂的研究进展[J]. 粉末冶金技术, 2004, 22(3): 178-182.
GUO Shibo, QU Xuanhui.Research progress in binders used for metal injection molding[J]. Powder metallurgy technology, 2014, 22(3): 178-182.
[8] 张小虎, 肖平安, 刘素红, 等. TiH₂粉末注射成形坯烧结工艺研究[J]. 粉末冶金技术, 2012(4): 293-299.
ZHANG Xiaohu, XIAO Pingan, LIU Suhong, et al.Study of sintering processes for powder injection molding of TiH₂[J]. Powder metallurgy technology, 2012, 30(4): 293-299.
[9] CARRENO-MORELLI E, BIDAUX J E, RODRIGUEZ- ARBAIZAR M, et al.Production of titanium grade 4 components by powder injection moulding of titanium hydride[J]. Powder Metallurgy, 2014, 57(2): 89-92.
[10] 马赞赞, 吴盾, 刘春林, 等. 金属粉末注射成型用催化脱脂黏结剂POM/PP共混物非等温结晶动力学研究[J]. 中国塑料, 2017, 31(4): 45-50.
MA Zanzan, WU Dun, LIU Chunlin, et al.Non isothermal crystallization kinetics of POM/PP blends with Catalytic debinding binder for metal powder injection molding[J]. China Plastics, 2017, 31(4): 45-50.
[11] 郑礼清, 李笃信, 李昆, 等. 粉末注射成形催化脱脂工艺研究[J]. 粉末冶金工业, 2009(2): 32-35.
ZHENG Liqing, LI Duxin, LI Kun, et al.Study on catalytic degreasing process of powder injection molding[J]. Powder Metallurgy Industry, 2009(2): 32-35.
[12] 周大纲, 谢鸽成. 塑料老化与防老化技术[M]. 中国轻工业出版社, 1998: 29-31.
ZHOU Dagang, XIE Gecheng.Plastic Aging and Anti-Aging Technology[M]. China Light Industry Press, 1998: 29-31.
[13] 刘素红. TiH₂粉末注射成形技术研究[D]. 长沙: 湖南大学, 2009.
LIU Suhong.Investigation of TiH₂ powder injection molding[D]. Changsha: Hunan University, 2009.
[14] 王耀奇, 张宁, 任学平, 等. 氢化钛的动态分解行为与规律[J]. 粉末冶金材料科学与工程, 2011(6): 795-798.
WANG Yaoqi, ZHANG Ning, REN Xueping, et al.Dynamic decomposition behavior and law of titanium hydride[J]. Materials Science and Engineering of Powder Metallurgy, 2011(6): 795-798.
[15] 戴坤良. TiH₂粉体脱氢特性和压制与烧结行为研究[D]. 长沙: 湖南大学, 2009.
DAI Kunliang.Study on dehydrogenation characteristics, pressing and sintering behavior of TiH₂ powder[D]. Changsha: Hunan University, 2009.
[16] 蔡一湘, 陈强, 丁燕. 注射成形钛零件的研究[J]. 粉末冶金技术, 2005(6): 449-455.
CAI Yixiang, CHEN Qiang, DING Yan.Research on injection molding titanium parts[J]. Powder Metallurgy Technology, 2005(6): 449-455.