铝线缆材用Al-Ti-B-M中间合金制备工艺的研究

发布时间：2018-09-18 06:31

【摘要】：近年来,铝及铝合金工业的发展越来越迅速,铝制品在人们日常生活中的应用也越来越广泛,在建设资源节约型社会的背景下,铝的回收循环再利用被人们重视起来,目前回收利用的再生铝中,由于杂质元素(Fe、Si等)含量较高,致其性能差,用途少。研究发现,在铝及合金中添加中间合金细化剂可以得到细小均匀的组织,改善机械加工性能、力学性能和导电性能,提高了产品质量,工业上目前大量使用的方法是在连铸连轧生产线中添加丝状中间合金细化剂。铝由于其质轻、强度高、导电性好等优点被线缆厂大量使用,将再生铝细化后用作线缆是一种非常好的选择。细化晶粒可提高铝的强度与改善铝的性能;添加微量元素对铝合金的导电性能有较大的影响。本文将二者结合起来,研究Al-5Ti-1B-M(M=La/Ce/Y/Ca)对回收利用的再生铝Al-Fe-Si微观组织、力学性能、导电性能的影响,旨在找到一种新型高效的线缆材用中间合金细化剂来改善再生铝的性能,使其可以作为工业线缆原材料。本论文通过改变试验原材料、操作工艺、热处理工艺等方法,研究了添加不同微量元素的细化剂对再生铝Al-Fe-Si合金性能的影响,主要得到以下结论:1,不同的微量元素对中间合金细化剂的微观组织影响不大,其中Al-5Ti-1B-La中间合金细化剂的组织性能相对更好一些。2,添加中间合金细化剂细化后,再生铝的拉伸性能、硬度、导电性能均有所改变,添加Al-5Ti-1B-La中间合金细化剂的再生铝各项性能均有所提升。3,采用工业用氟硼酸钾、氟钛酸钾制备的中间合金细化剂效果相对教好,并且制备成本大幅度降低。4,经热处理工艺优化后,再生铝的性能改变不明显
[Abstract]:In recent years, with the rapid development of aluminum and aluminum alloy industry, aluminum products are more and more widely used in people's daily life. In the context of building a resource-saving society, people attach importance to the recycling and reuse of aluminum. Because of the high content of impurity elements (Fe,Si, etc.), the recycled aluminum has poor performance and less use. It is found that the fine and uniform microstructure can be obtained by adding master alloy refiner to aluminum and alloys, and the mechanical properties, mechanical properties and conductive properties of the products can be improved, and the quality of the products can be improved. The most widely used industrial method is to add filamentous master alloy refiner in continuous casting and rolling production line. Aluminum is widely used in cable factories because of its advantages of light weight, high strength and good conductivity. It is a good choice to refine the regenerated aluminum and use it as cable. Grain refinement can increase the strength of aluminum and improve the properties of aluminum, and the addition of trace elements has a great effect on the conductivity of aluminum alloy. In this paper, the effects of Al-5Ti-1B-M (M=La/Ce/Y/Ca) on the microstructure, mechanical properties and electrical conductivity of recycled aluminum Al-Fe-Si were studied. The purpose of this study was to find a new and efficient intermediate alloy refiner for cable materials to improve the properties of recycled aluminum. So that it can be used as industrial cable raw materials. In this paper, the effects of different trace element refiners on the properties of regenerated aluminum Al-Fe-Si alloy were studied by changing the experimental raw materials, operation technology, heat treatment process and so on. The main conclusions are as follows: (1) different trace elements have little effect on the microstructure of master alloy refiner, and the microstructure and properties of Al-5Ti-1B-La master alloy refiner are better. The tensile properties, hardness and electrical conductivity of regenerated aluminum have been changed, and the properties of regenerated aluminum with Al-5Ti-1B-La master alloy refiner have been improved. The effect of the master alloy refiner prepared by industrial potassium fluoroborate and potassium fluorotitanate is relatively good. The cost of preparation was greatly reduced. 4. The properties of regenerated aluminum were not changed obviously after the optimization of heat treatment process.
【学位授予单位】：昌吉学院
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TG146.21;TG166.3

【参考文献】