Rolling Process Optimization of Vanadium Microalloyed Automobile Titanium Alloy
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摘要: 选用不同工艺进行了钒微合金化汽车钛合金Ti-Al-Mo-Cr-V的轧制试验,并进行了力学性能的测试与对比分析。结果表明,开轧温度和轧制变形量对试验合金力学性能产生明显影响。随开轧温度从945℃逐步提高到1 045℃时,试验合金力学性能先提高后下降;随轧制变形量从59%逐步增大到75%时,试验合金的力学性能先急剧提高后缓慢提高。试验合金的开轧温度优选为1 020℃、轧制变形量优选为67%。与945℃开轧温度相比,1 020℃轧制时试验合金的抗拉强度增大28 MPa、屈服强度增大34 MPa,断面收缩率减小2.5%。与59%轧制变形量相比,采用67%变形量轧制时试验合金的抗拉强度增大23 MPa、屈服强度增大27 MPa,断面收缩率减小1.5%。Abstract: Rolling tests of Ti-Al-Mo-Cr-V automobile titanium alloy microalloyed with vanadium were carried out by different processes,and the mechanical properties were tested and compared.The results show that the start-rolling temperature and rolling deformation have obvious effects on the mechanical properties of the tested alloys.The mechanical properties of the tested alloys first increase and then decrease with the increase of starting rolling temperature from 945 ℃ to 1 045 ℃.With the increase of rolling deformation from 59% to 75%,the mechanical properties of the alloys present a sharp increase followed by a slow increase.The optimum start-rolling temperature and rolling deformation of the tested alloy are 1 020 ℃ and 67%,respectively.Compared with those of alloy at the starting rolling temperature of 945 ℃,the tensile strength and yield strength of the tested alloy at 1 020 ℃ respectively increase by 28 MPa and 34 MPa,with the section shrinkage decreased by 2.5%.Compared with those of the alloy at 59% of rolling deformation,the tensile strength and yield strength of the alloy at 67% of deformation increase by 23 MPa and 27 MPa respectively,with the section shrinkage decreased by 1.5%.
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