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	注射成形纯钛脱粘和烧结工艺研究
	王瑞锋 ; 吴运新 ; 邹欣 ; 唐传安 ; Wang Ruifeng ; Wu Yunxin ; Zou Xin ; Tang Chuan'an
	2010-06-08 ; 2010-06-08
关键词	粉末注射成形 纯钛 脱粘 烧结 powder injection molding pure titanium debinding sintering TF124.39
其他题名	Debinding and sintering processes for injection molded pure titanium
中文摘要	粉末注射成形是制造复杂形状钛及钛合金零件的合适工艺。本文利用氢化脱氢(HDH)钛粉制备注射成形纯钛材料,研究了溶剂脱粘、热脱粘和真空烧结工艺对粘结剂脱除率、烧结显微组织和力学性能的影响。结果表明:溶剂脱粘的适宜温度为50~60℃,4h后可以脱除97%以上的可溶性粘结剂;在随后的真空热脱粘过程中,在200~450℃高温阶段降低升温速率、延长保温时间,有利于脱除剩余聚合物粘结剂;真空烧结温度为1250℃时,烧结致密度可高达98%,但表层易形成硬质TiC相和微量TiO2相;在该温度下烧结1.5h,制品抗拉强度和伸长率分别提高到349MPa和6.4%,继续延长烧结时间会导致拉伸性能下降。; Powder Injection Molding(PIM) is a suitable process for fabrication of complex shaped Ti and its alloys.This paper dealt with the injection molding of hydride dehydrogenization(HDH) Ti powders.The effects of solvent-thermal debinding and vacuum sintering on binder removal efficiency,sintered microstructure and mechanical properties were investigated.For solvent debinding,the optimum temperature was found to be in the range 50℃-60℃,and more than 97% of the soluble binder could be extracted after 4h immersion.For subsequent thermal vacuum debinding,a slow heating rate of 1℃/min between 200℃ and 450℃ was beneficial to the removal of remaining polymeric binders.After sintering at 1250℃ in vacuum(4-6×10~(-3)Pa),the relative density could be as high as 98%,but a hard surface layer consisting of α-Ti,TiC and TiO_2 phases was readily formed.By sintering at this temperature for 1.5h,the tensile strength and elongation were increased to 349MPa and 6.4%,respectively.Prolonged sintering would lead to the degradation of the tensile properties.; 教育部留学回国人员基金; 清华大学机械工程系青年基金; 清华大学实验室开放基金资助
语种	中文 ; 中文
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/48181]
专题	清华大学
推荐引用方式 GB/T 7714	王瑞锋,吴运新,邹欣,等. 注射成形纯钛脱粘和烧结工艺研究[J],2010, 2010.
APA	王瑞锋.,吴运新.,邹欣.,唐传安.,Wang Ruifeng.,...&Tang Chuan'an.(2010).注射成形纯钛脱粘和烧结工艺研究..
MLA	王瑞锋,et al."注射成形纯钛脱粘和烧结工艺研究".(2010).

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