锻造工艺对TA15钛合金扁坯组织和力学性能的影响  

Effect of Forging Process on Microstructure and Mechanical Properties of TA15 Titanium Alloy Slab

作　　者：闵新华[1] 纪仁峰[1] 

机构地区：[1]宝钢特钢有限公司,上海200940

出　　处：《钛工业进展》2016年第6期36-39,共4页Titanium Industry Progress

摘　　要：采用4种不同锻造工艺对TA15钛合金棒材进行热加工锻造,得到规格为80 mm×150 mm×L的扁坯,对扁坯进行800℃×1 h热处理。研究了加工工艺对其显微组织和力学性能的影响。结果表明,采用一次锻造(温度T1)/慢冷+二次锻造(温度T2)/快冷的工艺,锻出的TA15钛合金扁坯组织中初生α相含量约为10%,基体上具有较多的细小针状组织。用该工艺加工的TA15钛合金,其力学性能较其他工艺的高,横向和纵向性能差异较小,是一种性能比较优良的框锻件生产用坯料。TA15 titanium alloy bars were forged by four kinds of different forging processes, and the 80 mm× 150 mm ×L slabs were obtained. The effect of forging process on microstrueture and mechanical properties of TA15 titanium alloy slabs after heat treatment of 800 ℃ × 1 h was investigated. The results show that, adopting the first isothermal- forging processing at temperature of T1 with slow cooling plus the second isothermal-forging processing at temperature of T2 with quick cooling, the content of primary a phase in microstructure of slab is about 10%, and lots of thin aeieulate phases are found in the matrix. The mechanical properties of the slab are best among all the forging processes. The difference between transverse properties and longitudinal properties are small. This process is a good way to produce TA15 titanium slab for frame forgings.

关 键 词：TA15钛合金 扁坯 锻造工艺 组织演变 

分 类 号：TG319[金属学及工艺—金属压力加工]