钼合金纳米喷雾掺杂工艺研究

发布时间：2018-03-25 00:21

本文选题：纳米喷雾掺杂　切入点：弥散强化　出处：《稀有金属》2017年01期

【摘要】：开发出一种钼合金纳米喷雾掺杂工艺及其过程控制方法;采用传统固-液掺杂工艺和纳米喷雾掺杂工艺分别制备出Mo-La合金丝材和板材,并测试其室温力学性能和使用性能;采用透射电镜(TEM)和经典弥散强化理论,分析了纳米掺杂钼合金强韧化机制。结果表明,按照1∶20的纳米粉末与去离子水的最大固液质量比、经过30 min搅拌制备的纳米悬浮液在在线搅拌装置和空气压力作用下,通过适当结构的喷头喷淋到Mo O2粉末中,可实现钼合金的纳米掺杂;液体介质中纳米粉末离散稳定性检测方法和钼合金粉末中掺杂元素微观均匀性检测方法可对纳米喷雾掺杂工艺的制备过程实现实时控制;在相同成分下,纳米喷雾掺杂工艺制备的Mo-La合金丝、板材的综合力学性能和使用寿命均比固-液掺杂工艺提高50%以上。TEM照片和Fisher理论分析结果表明,纳米喷雾掺杂工艺实现了第二相粒子以纳米尺度均匀分布,第二相粒子的尺寸、数量和分布均匀程度远优于固-液掺杂工艺,从而保证了其有效发挥弥散强化作用。
[Abstract]:A kind of molybdenum alloy nano-spray doping process and its process control method were developed, Mo-La alloy wire and plate were prepared by traditional solid-liquid doping process and nano-spray doping process, and their mechanical properties and application properties were tested at room temperature. The mechanism of strengthening and toughening of nanocrystalline molybdenum alloy was analyzed by means of transmission electron microscopy (TEM) and classical dispersion strengthening theory. The results show that according to the maximum solid-liquid mass ratio of nanometer powder and deionized water at 1:20, Nanocrystalline doping of molybdenum alloy can be realized by spraying the nano-suspension prepared by 30 min agitation into MoO2 powder under the action of on-line stirring device and air pressure. The discrete stability detection method of nano-powder in liquid medium and the micro-uniformity detection method of doping elements in molybdenum alloy powder can be used to control the preparation process of nano-spray doping process in real time. The comprehensive mechanical properties and service life of Mo-La alloy wire prepared by nano-spray doping process are more than 50% higher than that of solid-liquid doping process, and the results of Fisher theoretical analysis show that the composite mechanical properties and service life of Mo-La alloy wire are more than 50% higher than that of solid-liquid doping process. The size, quantity and distribution uniformity of the second phase particles are much better than that of the solid-liquid doping process, which ensures that the second phase particles can play an effective role in dispersion strengthening by the nano-spray doping process, and the size, quantity and distribution uniformity of the second phase particles are much better than that of the solid-liquid doping process.
【作者单位】：金堆城钼业股份有限公司技术中心;
【基金】：“十二五”国家科技支撑计划项目(2012BAE06B02) 陕西省科技统筹创新工程计划项目(2015KTZDGY09-05)资助
【分类号】：TG146.412

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