TA15钛合金厚板热轧变形规律研究  

Study on Deformation Mechanisms of TA15 Titanium Alloy Plate During Hot Rolling

作　　者：檀雯[1] 都海刚[1] 杨军[1] 杨奇[1] 张智鑫[1] 王永强[1] 欧笑笑 TAN Wen;DU Haigang;YANG Jun;YANG Qi;ZHANG Zhixin;WANGYongqiang;OUXiaoxiao(Baoti Group Co.Ltd.,Baoji,721014,China)

机构地区：[1]宝钛集团有限公司,陕西宝鸡721014

出　　处：《有色金属材料与工程》2020年第4期17-23,共7页Nonferrous Metal Materials and Engineering

摘　　要：将热力模拟和数值模拟相结合,研究了TA15钛合金厚板热轧成形工艺,分析了不同变形条件下流变应力的变化规律,获得了不同工艺参数对TA15钛合金厚板应力应变场的影响规律,同时还追踪了在不同轧制阶段板坯内部特征点温度场、等效应力、等效应变的历史变化。研究结果表明:随温度的升高,发生了α相到β相的转变,使流变应力下降;温度在950~1 000℃内,流变应力曲线随应变速率下降而变得更平坦;实际生产工艺参数应选取压下量为20 mm、轧制温度为Tβ-10℃、轧制速度为50~71 r·min-1时,板坯应变、应力场分布较为均匀。By combining thermal simulation and numerical simulation, the changing rule of flow stress under different deformation conditions was analyzed, and the hot rolling forming technology of TA15 titanium alloy thick plate was studied. The influencing law of different process parameters on the stressstrain field of TA15 titanium alloy thick plate was obtained, and the change of temperature field,equivalent stress and equivalent strain at the internal characteristic point of slab in different rolling stages were tracked. The results show that the transition from α phase to β phase occurs with the increase of temperature, so the flow stress is decreased. When the temperature is in 950 ~ 1 000 °C, the flow stress curves become more flat with the decrease of strain rate. The actual production parameters should be the reduction of 20 mm, the rolling temperature of Tβ-10 °C, the rolling speed of 50 ~71 r·min-1, and the distributions of strain and stress field of slab are more uniform.

关 键 词：热力模拟 数值模拟 流变应力 厚板轧制 变形规律 

分 类 号：TG335.51[金属学及工艺—金属压力加工]