Mo-0.7%La合金热处理后的微观组织稳定性研究Microstructure Stability of Molybdenum 0.7 % Lanthanum Alloy after Heat Treatment
刘仁智,张铁军,安耿
摘要(Abstract)：
为了考查Mo-0.7%La(质量分数,下同)合金板在1 373 K和1 773 K下微观组织的稳定性,Mo-0.7%La合金板经过90%的加工变形,对比了不同热处理时间72 h,144 h,216 h合金板微观组织的变化,以及在温度1 373 K,热处理时间为720～4 320 h时热处理后的微观组织变化,且通过金相组织模拟图研究微观组织的变化。试验结果表明:在温度为1 373 K,热处理时间为216 h时,钼镧合金板的微观组织仍保持细小晶粒;当热处理时间为2 880 h时,晶粒迅速长大;热处理时间达到4 320 h时,微观组织保持条状;通过金相模拟图也可见Mo-0.7%La合金板微观组织从加工纤维状演变为等轴状再形成宽条状,表明钼镧合金在1 373 K,4 320 h以内的组织稳定性较好。
关键词(KeyWords)： 钼镧合金;热处理;微观组织;金相模拟
基金项目(Foundation): 国家重点研发计划(2017YFB0306003);; 陕西省重点研发计划项目(2018ZDXM-GY-120)
作者(Author): 刘仁智,张铁军,安耿
参考文献(References)：
- [1] CHAN Wren,GAO Michael C,DO GAN Omer N.et al.Thermodynamic assessment of Mo-Ce and Mo-Y systems[J].Journal of Phase Equilibria and Diffusion,2010,31(5):414-420.
- [2] SCHIMTP C,MROTZEK T,MARTIN U.Thermally activated flow stress component of the Mo alloy TZM determined by constitutive models[J].International Journal of Refractory Metals and Hard Materials,2010,28(6):716-721.
- [3] SSHIELDS J A,LIPETZKY J P,MUELLER A J.Fracture toughness of 6.4 mm(0.25 inch)arc-cast molybdenum and molybdenumTZM plate at room temperature and 300℃[C].15th International Plansee Seminar,Austra,2001(4):187-199.
- [4]任宝江.La-Mo合金粉的制备工艺及性能研究[D].西安：西安建筑科技大学，2009:35-42.REN Baojiang.Study on the preparation and properties of La-Mo alloy powder[D].Xi'an:Xi'an University of Architecture and Technology,2009:35-42.
- [5]王林，孙军，孙院军，等.不同退火温度对Mo-La2O3板材微观组织及力学性能的影响[J].中国钼业，2011,35(5):37-41.WANG Lin,SUN Jun,SUN Yuanjun,et al.Effect of different annealing temperature on microstructure and mechanical properties of Mo-La2O3sheet[J].China Molybdenum Industry,2011,35(5):37-41.
- [6] CHEN C,WANG S,JIA Y L,et al.The microstructure and texture of Mo-La2O3alloys with high transverse ductility[J].Journal of Alloys&Compounds,2014,589:531-538.
- [7]张新，王晖，李延超，等.退火温度对TaW12合金组织性能的影响[J].中国钨业，2019,34(3):51-54.ZHANG Xin,WANG Hui,LI Yanchao,et al.Effect of annealing temperatures on the microstructure and properties of TaW12 alloy[J].China Tungsten Industry,2019,34(3):51-54.
- [8]李敏.钼镧合金厚板材退火工艺对其热成形性影响研究[J].中国钨业，2018,33(3):41-45.LI Min.Effects of annealing process on thermal deep drawing of Mo-La plate[J].China Tungsten Industry,2018,33(3):41-45.
- [9]沈思奇，陈杉杉，方毅金，等.不同镧含量对钼镧合金烧结致密性的影响[J].中国钼业，2020,44(1):54-57.SHEN Siqi,CHEN Shanshan,FANG Yijin,et al.Effect of different lanthanum content on sintering compactness of molybdenum lanthanum alloy[J].China Molybdenum Industry,2020,44(1):54-57.
- [10]王艳，王国栋，武宇，等.钼镧合金中稀土相的研究[J].稀有金属，2007,31:50-53.WANG Yan,WANG Guodong,WU Yu,et al.Study about the rare earth phases in Mo-La alloy[J].Chinese Journal of Rare Metals,2007,31:50-53.
- [11]祁美贵，郑艾龙，黄志民，等.钼镧合金板材高温抗下垂性能的研究[J].中国钨业，2016,31(6):46-48.QI Meigui,ZHENG Ailogn,HUANG Zhimin,et al.Experimental study on the suspended solid settlement pattern of scheelite dressing tailrace in wetland filler[J].China Tungsten Industry,2016,31(6):46-48.
- [12]刘涛，史振琦，白秋平，等.高镧钼合金稀土相研究[J].中国钨业，2015,30(6):63-66.LIU Tao,SHI Zhengqi,BAI Qiuping,et al.RE phase of Mo-la alloy with high levels of La[J].China Tungsten Industry,2015,30(6):63-66.
- [13] SUN Guodong,ZHAGN Guohua,CHOU Kuochi.Nanostructured oxide dispersion strengthened Mo alloys from Mo nanopowder doping with oxide nanoparticles[J].Journal of Materials Research and Technology,2019(11):5753-5762.
- [14]王广达，熊宁，唐亮亮，等.退火处理对钼铼合金箔材性能的影响[J].中国钼业，2019,43(2):41-44.WANG Guangda,XIONG Ning,TANG Liangliang,et al.Effect of heat treatment on the properties of Mo Re alloy foils[J].China Molybdenum Industry,2019,43(2):41-44.
- [15]喻亮，程小强，刘江涛，等. Mo-La2O3波纹板显微结构与耐高温性能的构效关系[J].价值工程，2019(16):139-142.YU Liang,CHENG Xiaoqiang,LIU Jiangtao,et al.Structure-activity relationship between microstructure and high temperature resistance of the Mo-La2O3corrugated plate[J].Value Engineering,2019(16):139-142.
- [16] LIN Xiaohui,LI Bin,LI Laiping.Microstructure and improved mechanical properties of Mo-12Si-8.5B alloys with lanthanum oxide addition[J].Rare Metals,2019(9):46-52.