热处理制度对TC8-1钛合金组织和性能的影响  

Effect of heat treatment on microstructure and properties of TC8-1 titanium alloy

作　　者：雒水会[1] 冯秋元[1,2] 薛虎明[1] 张平辉[1,2] 王鼎春[1,2] 高颀[1,2] 

机构地区：[1]宝鸡钛业股份有限公司,陕西宝鸡721014 [2]宝钛集团有限公司,陕西宝鸡721014

出　　处：《材料热处理学报》2018年第1期27-31,共5页Transactions of Materials and Heat Treatment

摘　　要：为了提高TC8-1钛合金的性能,对TC8-1钛合金热处理制度进行研究。通过采用不同固溶温度和时效温度处理,分析了热处理制度对TC8-1钛合金显微组织和力学性能的影响。结果表明：随着固溶温度的升高,合金中等轴初生α相含量由65%下降至25%,β转变组织明显粗化,合金由等轴组织转变为双态组织,合金的室温强度降低,而塑性略有提高;随着时效温度的升高,合金中等轴初生α相含量无明显变化,合金的抗拉强度略有降低,而塑性无明显变化。经930℃×2 h,空冷（AC）＋580℃×1 h,空冷（AC）热处理后,TC8-1钛合金可获得强度与塑性的较佳匹配。In order to improve the performance of TC8-1 titanium alloy, heat treatment processes of TC8-1 titanium alloy were studied. The effect of heat treating process on microstructure and mechanical properties of TC8-1 titanium alloy after solution and aging treatment at different temperatures was analyzed. The results show that the content of equiaxed primary α phase decreases from 65% to 25% and the transformed β structure becomes coarse with the increasing of solution temperature. Meanwhile, the equiaxed microstructure transforms into duplex microstructure. Therefore, the room temperature strength of the alloy decreases and the plasticity increases slightly. However, the content of equiaxed primary α phase changes little with the increase of aging temperature. The tensile strength at room temperature drops a little, but the ductility has no obvious changes. After heat treatment at 930 ℃ for 2 h by air cooling, and then aging at 580 ℃ for 1 h by air cooling, TCS-1 titanium alloy can obtain the optimum combination of strength with plasticity.

关 键 词：TC8-1钛合金 固溶 时效 组织 性能 

分 类 号：TG146.2[一般工业技术—材料科学与工程]