| 引用本文: | 杨晓霞,马新武,王广春.金属粉末注射成形钛合金工艺研究[J].材料科学与工艺,2021,29(2):90-96.DOI:10.11951/j.issn.1005-0299.20200215. |
| YANG Xiaoxia,MA Xinwu,WANG Guangchun.Research on the technology of metal powder injection molding of titanium alloy[J].Materials Science and Technology,2021,29(2):90-96.DOI:10.11951/j.issn.1005-0299.20200215. |
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| 摘要: |
| 为了探究保障最终产品性能满足ASTM标准的粉末注射成形工艺,本文采用金属粉末注射成形方法,以德国Basf公司提供的喂料为原料,通过对注射参数优化获取1组最优注射工艺参数,用于后续脱脂及烧结工艺。利用拉伸、弯曲等力学实验,扫描电镜、金相光学显微镜等表征方法对材料的力学性能及微观结构进行表征,研究了注射、脱脂和烧结工艺参数对生坯性能、生坯失重率及烧结件力学性能等的影响。研究表明,在1 350 ℃保温4 h的条件下,制备的烧结件的屈服强度为882 MPa,极限抗拉强度为971 MPa,伸长率8.21%,相对密度98%。烧结样件微观结构表征表明,烧结过程发生了β相变,得到了含有较大尺度α片层束的魏氏体组织,因而强度较高,塑韧性略低。 |
| 关键词: 金属粉末注射成形 钛合金 脱黏 烧结 力学性能 |
| DOI：10.11951/j.issn.1005-0299.20200215 |
| 分类号:TF124; TF125 |
| 文献标识码:A |
| 基金项目:国家自然科学基金项目资助(51775311). |
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| Research on the technology of metal powder injection molding of titanium alloy |
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YANG Xiaoxia, MA Xinwu, WANG Guangchun
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(School of Materials Science and Engineering, Shandong University, Ji′nan 250061, China) [HJ1.8mm]
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| Abstract: |
| In order to study the powder injection molding process that make the final product properties meet ASTM standards, the method of metal powder injection molding was used in this paper, and the feedstock provided by BASF Corporation, Germany was used as raw material. By optimizing the injection parameters, the optimal injection parameters were obtained for the debinding and sintering processes subsequently. The mechanical properties and microstructure of the materials were characterized by tensile and bending experiments, scanning electron microscopy (SEM), metallographic optical microscopy (MS) and other testing methods. The results showed that the yield strength, ultimate tensile strength, elongation and relative density of the sintered parts were 882 MPa, 971 MPa, 8.21% and 98%, respectively, under the sintering condition at 1 350 ℃ for 4 hours. The microstructure of the sintered sample showed that phase transition occurred in the sintering process, and the widmanstatten containing thick lamellar colonies was obtained, thus having higher strength and slightly lower plasticity. |
| Key words: metal powder injection molding titanium alloy debinding sintering mechanical property |
