双性能钛合金压气机盘的成形机理
来源期刊：中国有色金属学报2000年第3期
论文作者：姚泽坤 郭鸿镇 刘建超 苏祖武 姜明 应志毅 刘建宇 崔健
文章页码：378 - 382
关键词：TC11钛合金； 双性能盘； 成形机理
Key words：TC11 Ti alloy； dual-property compressor disc； forging; deformation mechanism
摘 要：通过将两相钛合金毛坯组织改变为针状α′相过饱和马氏体， 根据盘形零件各部位在工作环境下对组织形态的要求各不相同，设计了能控制应变量的毛坯形状和规格， 制造出轮缘具有网篮状组织或魏氏组织， 而轮辐、 轮毂具有等轴细晶组织的双重组织—双重性能的压气机盘， 以满足工作温度梯度、应力梯度较大的航空发动机内压缩机用盘形件的要求。
Abstract: The mechanism of forging a dualproperty compressor disc using twophase titanium alloy was studied. In order to fabricate the dualproperty compressor disc, the microstructure of billet must be changed to martensite through forging in α+β two phase region and heating in β phase region, followed by water cooling. According to the requirement of microstructure on different locations of the disc due to great temperature and stress gradients under given conditions, the deformation extent and the size of billet were designed. TC11 Tialloy dual property compressor disc of d 420 mm and d510 mm were forged by isothermal , or conventional die forging method. The disc core is of equiaxed microstructure with high strength, ductility and lowcycle fatigue life and the rim is of net microstructure with high resistance to high temperature creep and high fracture toughness.
