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利用钨极氩弧沉积制造技术制备了TC4钛合金试样,研究了电弧沉积制造TC4钛合金的显微组织和力学性能。分析表明:电弧沉积制造TC4钛合金组织宏观上呈以基材为基底的外延连续生长的粗大柱状晶特点,由α相和β相组成,但α相随位置的不同形貌有差别,在上部位置呈粗大针状魏氏体组织,在中部呈粗化了的层片状网篮组织,在下部呈针状+层片状混合组织。显微硬度测试表明:沉积成形件硬度较高,且越靠近试样表面硬度越大。室温拉伸测试显示,沉积态试样具有明显的各向异性特点,沿焊接水平方向拉伸强度较高,沿沉积高度方向拉伸塑性较好,且所有测试试样均具有超过锻造TC4合金的强度和塑性指标。
TC4 titanium alloy samples were prepared by TIG arc deposition technology and the microstructure and mechanical properties of TC4 titanium alloy by arc deposition were studied. The results show that the TC4 titanium alloy produced by arc deposition has macroscopically large cylindrical columnar growth characterized by epitaxial growth on the substrate. It is composed of α phase and β phase. However, the morphology of TC4 varies with the topography The location was coarse needle-shaped austentitic tissue, was roughened in the middle of the layer-like baskets in the lower acicular + lamellar mixed tissue. Microhardness tests show that: the deposition of high hardness, and the closer to the specimen surface hardness. Tensile tests at room temperature show that the as-deposited samples have obvious anisotropy, high tensile strength along the welding direction, good ductility and plasticity along the deposition height, and all the tested samples have the properties of more than forged TC4 alloy Strength and plasticity indicators.