固溶时效对TA10钛合金组织与力学性能的影响
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摘要
研究了固溶时效处理对TA10钛合金棒材组织和性能的影响。结果表明:在890℃相变点以下加热时,随着固溶温度的升高,初生α相含量不断减少,β转变组织逐渐增多,合金强度增加,塑性先升高后降低;当固溶温度超过相变点时,组织形态转变为魏氏组织,合金强度进一步增加,塑性显著降低;本试验得到的较佳固溶时效处理制度为800℃保温30 min,水冷+500℃保温2 h,空冷,可获得良好的组织与性能。
The effect of solution and aging treatment on the microstructure and mechanical properties of TA10 alloy bar were studied. The results show that, when heated below the transition point of 890 ℃, with the increase of solution temperature, the content of primary α-phase decreases, and the β-transformation microstructure increases gradually. The strength of the alloy increases and the plasticity first increases then decreases. When the solution temperature exceeds the transition point, the morphology of the structure changes to widmanstatten structure, and the strength of the alloy increases further and the plasticity decreases significantly. The optimum solution and aging treatment process is 800 ℃for 30 min(water cooling)+500℃ for 2 h(air cooling), and preferable microstructure and mechanical properties can be obtained under this heat treatment.
The effect of solution and aging treatment on the microstructure and mechanical properties of TA10 alloy bar were studied. The results show that, when heated below the transition point of 890 ℃, with the increase of solution temperature, the content of primary α-phase decreases, and the β-transformation microstructure increases gradually. The strength of the alloy increases and the plasticity first increases then decreases. When the solution temperature exceeds the transition point, the morphology of the structure changes to widmanstatten structure, and the strength of the alloy increases further and the plasticity decreases significantly. The optimum solution and aging treatment process is 800 ℃for 30 min(water cooling)+500℃ for 2 h(air cooling), and preferable microstructure and mechanical properties can be obtained under this heat treatment.
引文
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[3]訾群.钛合金研究新进展及应用现状[J].钛工业进展,2009,4(3):77-80.
[4]陈军,赵永庆,常辉.中国船用钛合金的研究和发展[J].材料导报,2005,19(6):67-70.
[5]孙建科,孟祥军,陈春和,等.我国船用钛合金的研究、应用及发展[J].金属导报,2002,38(1):33-35.
[6]葛伟,邓宁嘉,丁春聪,等.TA10钛合金板材的热处理工艺研究[J].钛工业进展,2015,32(4):25-28.
[7]王海,刘军.固溶时效对Ti6242合金组织性能的影响[J].热加工工艺,2014,43(16):198-200.
[8]冯冉,寇宏超,常辉,等.固溶处理对一种近α钛合金显微组织的影响[J].稀有金属材料与工程,2008,37(10):1785-1789.
[9]郭萍,洪权,曾立英,等.固溶处理对Ti-600高温钛合金蠕变性能的影响[J].热加工工艺,2006,35(14):50-52.