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以不同形态TC4合金粉末为原料及添加TiC增强相，采用真空热压烧结技术制备了不同的TC4钛合金试样，并对其显微组织、致密度和力学性能进行了观察与分析。结果表明：采用球形TC4粉末为原料及30 MPa烧结压力的真空热压烧结制备的粉末冶金TC4钛合金的致密度可达到98%以上，显微组织由β相和α相组成，并分布有少量的TiV相，抗拉强度为495 MPa,硬度为419 HV0.3,力学性能明显优于以球形TC4粉末为原料无压力烧结的TC4钛合金，略优于以不规则TC4粉末为原料热压烧结的钛合金；在球形TC4粉末中加入4%TiC增强相后，真空热压烧结制备的TC4钛合金的晶粒得到显著细化，TiC相分布在晶界起到第二相强化作用，硬度提高到444 HV0.3,抗拉强度提高到554 MPa。
Abstract：Different TC4 titanium alloy samples were prepared by vacuum hot pressing sintering technology using TC4 alloy powders with different morphology as raw materials and with the addition of a TiC reinforcing phase, and their microstructure, relative density and mechanical properties were characterized and analyzed. The results show that the relative density of powder metallurgy TC4 titanium alloy prepared by vacuum hot pressing with spherical TC4 powder as raw material and a sintering pressure of 30 MPa reaches more than 98%, the microstructure is composed of β phase and α phase, with a small amount of TiV phase distributed within, the tensile strength is 495 MPa, the hardness is 419 HV0.3, and the mechanical properties are significantly better than those of the TC4 titanium alloy sintered without pressure using spherical TC4 powder as raw material, and slightly better than those of titanium alloy prepared by vacuum hot-pressing sintering using irregular TC4 powder as raw material. After adding 4% TiC reinforcing phase into the spherical TC4 powder, the grain size of the TC4 titanium alloy prepared by vacuum hot pressing sintering is significantly refined, the TiC phase distributed at the grain boundary exerts a second-phase strengthening effect, the hardness increases to 444 HV0.3, and the tensile strength increases to 554 MPa.
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基本信息:
DOI：10.13289/j.issn.1009-6264.2025-0136
中图分类号:TG146.23
引用信息:
[1]秦文栋,邵星海,王文焱,等.烧结压力、粉末形态和增强相对TC4钛合金组织和力学性能的影响[J].材料热处理学报,2026,47(03):107-116.DOI:10.13289/j.issn.1009-6264.2025-0136.
基金信息:
河南省重大科技专项(关键领域转动部件用高品质低成本海绵钛关键技术研发及产业231100230200)
2026-03-20
2026-03-20