热处理对TB2合金力学性能的影响

发布时间：2018-10-23 21:00

【摘要】：研究了不同热处理制度对TB2钛合金板材的显微组织及力学性能的影响,探究能够达到合金强度及塑性综合匹配较好的热处理制度。结果表明:双时效处理后合金晶粒粗大,次生相细小,弥散分布在晶内及晶界处;固溶时效处理后合金晶粒细小,晶内弥散分布着大量纵横交错的针状次生相。室温拉伸结果表明,双时效处理后合金的强度较高,塑性较差,且随时效温度的降低,合金强度提高,塑性降低。固溶时效处理后具有较好的强度与塑性匹配,其中以750℃固溶+510℃时效处理为最优热处理制度。最优条件下,强度达到1125 MPa,伸长率达到15%。双时效处理后室温拉伸断口呈撕裂状脆性断口,固溶时效处理后断口呈韧窝状。
[Abstract]:The effects of different heat treatment systems on the microstructure and mechanical properties of TB2 titanium alloy sheet were studied. The results show that the grain size of the alloy after double aging treatment is coarse, the secondary phase is fine, and the dispersion is distributed in the intergranular and grain boundaries, while after the solution aging treatment, the alloy grain is fine, and a large number of interlaced needle-like secondary phases are distributed in the crystal. The tensile results at room temperature show that the strength and plasticity of the alloy after double aging treatment are higher and worse, and the strength and plasticity of the alloy increase with the decrease of the temperature at any time. After the solution aging treatment, the strength and plasticity match well, among which 750 鈩，

本文编号：2290450