机械紧固件用新型钛合金的锻造温度优化

Optimization on forging temperature of new titanium alloy for mechanical fasteners

采用不同的锻造温度对机械紧固件用新型钛合金进行了锻造试验,并进行了耐磨损性能和高温抗氧化性能的测试与分析。结果表明:随始锻温度从1020℃升高至1100℃,试样的磨损体积和单位面积质量增重先减小后增大,与1020℃始锻时相比,始锻温度为1080℃时试样的磨损体积减小了35. 48%,单位面积质量增重减小了36. 36%。随终锻温度从800℃升高至880℃,试样的磨损体积和单位面积质量增重先减小后增大,与800℃终锻时相比,终锻温度为860℃时试样的磨损体积减小了42. 86%,单位面积质量增重减小39. 13%。机械紧固件用新型钛合金Ti-3Al-5Mo-4. 5V-1Sr-0. 5Ce的始锻温度优选为1080℃、终锻温度不低于860℃。

The forging tests of new titanium alloy for mechanical fasteners were conducted at different forging temperatures,and the wear resistance and high temperature oxidation resistance properties were tested and analyzed. The results show that the wear volume and weight gain per unit area of specimens decrease first and then increase with the increasing of initial forging temperature from 1020 ℃ to 1100 ℃.Compared with the initial forging at 1020 ℃,the wear volume and weight gain per unit area of specimens decrease by 35. 48% and 36. 36% respectively when the initial forging temperature is 1080 ℃. With the increasing of final forging temperature from 800 ℃ to 880℃,the wear volume and weight gain per unit area of specimens decrease first and then increase. However,compared with the final forging at 800 ℃,the wear volume and the weight gain per unit area of specimens decrease by 42. 86% and 39. 13% respectively when the final forging temperature is 860 ℃. Thus,the initial forging of Ti-3Al-5Mo-4. 5V-1Sr-0. 5Ce titanium alloy for mechanical fasteners is preferred to be at 1080 ℃ and the final forging temperature is not less than 860 ℃.