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钛和钛合金由于具有诸如高比强度、低弹性模量、优异的耐腐蚀性以及生物相容性等一系列优良的综合性能,成为目前最有前景的生物医用材料,但是其较差的机加工性能限制了钛材料的应用,尤其是在形状复杂零件中的应用。金属粉末注射成形(MIM)可以实现复杂形状产品的近终成形,这种成形工艺能够大大扩展钛及钛合金的应用范围。利用水溶性注射料进行了力学性能测试试样的制备,通过优化工艺参数,最终获得了相对密度为95.7%的纯钛烧结件,其他主要理化性能如下:氧质量分数0.196%,氮质量分数0.007%,屈服强度403.12 MPa,极限抗拉强度491.33 MPa,伸长率21.4%,除相对密度外其他性能均满足ASTM F2989-13二级纯钛标准。
Titanium and titanium alloys are currently the most promising biomedical materials due to their excellent combination of properties such as high specific strength, low modulus of elasticity, excellent corrosion resistance and biocompatibility, but their poor machine Processing properties limit the application of titanium materials, especially in the complex shape parts. Metal Powder Injection Molding (MIM) enables the near-final forming of complex shaped products that can greatly expand the range of applications for titanium and titanium alloys. The preparation of mechanical properties test samples by using water-soluble injection material finally obtained the pure titanium sintered parts with the relative density of 95.7% by optimizing the process parameters. The other main physical and chemical properties are as follows: oxygen mass fraction 0.196%, nitrogen mass fraction 0.007 %, Yield strength of 403.12 MPa, ultimate tensile strength of 491.33 MPa, elongation of 21.4%, in addition to the relative density of other properties meet the ASTM F2989-13 two titanium standards.