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钼钒铝铁四元中间合金制备新工艺初探
Preliminary Exploration of a New Process for Preparing Molybdenum-Vanadium-Aluminum-Iron Quaternary Intermediate Alloy
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- DOI:
- 作者:
- 韩茜1,2,3刘彦峰1,2,3张美丽1,2,3代卫丽1,2,3杨超普1,2,3李晓龙1,2,3宋家立1,2,3
HAN Xi1，2，3,LIUYanfeng1，2，3,ZHANG Meili1，2，3,DAIWeili1，2，3,YANG Chaopu1，2，3, LI Xiaolong1，2，3,SONG Jiali1，2，3
- 作者单位:
- 1. 商洛学院 化学工程与现代材料学院，陕西 商洛 726000；2. 陕西省尾矿资源综合利用重点实验室，陕西 商洛 726000； 3. 陕西省矿产资源清洁高效转化与新材料工程研究中心，陕西 商洛 726000
1. School of Chemical Engineering and Modern Materials, Shangluo University, Shangluo 726000, China; 2. Shaanxi Key Laboratory of Comprehensive Utilization of Tailings Resources, Shangluo 726000, China; 3. Shanxxi Engineering Research Center for Mineral Resources Clean & Efficient Conversion and New Materials, Shangluo 726000, China
- 关键词:
- 钼钒铝铁四元中间合金；真空感应精炼；物相组成；宏观形貌；显微组织；性能
molybdenum-vanadium-aluminium-iron quaternary intermediate alloy; vacuum induction refining; phase composition; macroscopic morphology; microstructure; performance
- 摘要:
- 目前，企业制备钼钒铝铁四元中间合金通常使用一步法，此方法生产成本低廉，操作简便。 二次真空精炼后可进一步去除合金中的气体、杂质和夹杂物，改善元素分布，减少结晶缺陷和偏析，提高合金质量。 但由于铝和铁在热力学上不易发生直接的热反应，因此先通过铝热法制备初级钼钒铝合金，随后在二次真空感应精炼过程中加入适量 Fe，获得钼钒铝铁四元中间合金。 通过测试元素含量，分析其物相组成、微观组织形貌及性能，探索高品质钼钒铝铁四元中间合 金 的 制 备 新 工 艺 。 结 果表 明 ， 真空 感 应 精 炼 后 合 金 中 的 O 和 N 元素 含 量显 著 降 低 且 合 金 表 面 质 量 好 。Mo30V30Fe5Al35 合金主要由 V0.5Mo0.5、Al5Mo、Al86Fe14、Fe2Mo3 相组成，且组织较为均匀。 所得合金的平均密度和硬度分别为 6.2 g/cm3 和 68.86 HRC。At present, relevant enterprises usually use a one-step method to prepare molybdenum-vanadium-aluminum-iron quaternary intermediate alloys, which have a low production cost and simple operation. After secondary vacuum refining, the gas, impurities and inclusions in the alloy can be further removed, the element distribution can be improved, the number of crystallization defects and segregation can be reduced, and the alloy quality can be improved. However, since aluminium and iron do not easily undergo direct thermal reactions via thermodynamics , the primary molybdenum- vanadium-aluminium alloy was first prepared via the thermite method. An appropriate amount of Fe was subsequently added during the second vacuum induction refining process to obtain the molybdenum-vanadium-aluminum-iron quaternary intermediate alloy. By testing the elemental composition and analysing the phase composition, microstructural morphology, and properties, new preparation processes for high-quality molybdenum-vanadium-aluminum-iron quaternary intermediate alloy were explored. The results show that the content of O and N in the alloy decreases significantly and that the surface quality of the alloy is good after vacuum induction refinement. The Mo30V30Fe5Al35 alloy is mainly composed of V0.5Mo0.5,Al5Mo, Al86Fe14 and Fe2Mo3 phases, and the structure is relatively uniform. The average density and hardness of the obtained alloys are 6.2 g/cm3 and 68.86 HRC, respectively.