《钨粉生产工艺研究》毕业学术论文.doc

PAGE I XXXXXX毕业论文 钨粉生产工艺的研究 学 生：XXX 学 号：XXXX 专 业：物理学 班 级：XXXX 指导教师：XXXXX XXXXXXXXX 二O一三年六月 ABSTRACT 摘 要 PAGE III 摘 要 钨粉在工业生产中占着越来越重要的位置，本文着重对钨粉的生产工业做出来研究，其中包括研究钨金属的性质和用途，钨的物理性质；化学性质以及钨的实际用途。只有了解钨的性质和性能的重要性才能更好更透彻的研究钨的生产工艺。金属钨具有广泛的用途，钨合金中最主要的原料是钨粉，其粒度的大小对合金的性能起关键性的作用。钨粉的粒度主要为粗、中、细粒。含细颗粒的合金比含粗颗粒的合金，其性能明显的提高；若合金含超细晶粒，则性能可产生质的飞跃,达到高强度与高硬度的统一，从而扩展其应用领域。同时，金属钨在这些领域中的应用还与其形貌、粒度的分布有着密切的关系。本文综述了近年来超细钨粉的多种制备方法，并对比不同方法所制备超细粉末的优缺点。最后在生产工艺的介绍中本文挑选了目前工业上最常用的三氧化钨还原法制作钨粉的方法以及各种超细钨粉的生产方法做出了分析和研究。 关键词：钨粉；性质用途；工业研究；超细钨粉；三氧化钨氢还原法 ABSTRACT PAGE IV ABSTRACT Tungsten powder?in industrial production?occupied?an increasingly important position, this paper focuses?on?the production of?tungsten powder?made ??out?of industrial research including?research?on the production of tungsten,?tungsten?physical properties;?chemical properties?as well as?the actual use of tungsten .Only by understanding the nature and Properties of tungsten in order to better the importance of a more thorough study of tungsten production process. Tungsten with a wide range of uses the most important raw material for tungsten alloy of tungsten powder, the particle size of the size of the alloy play a crucial?role in the performance.?The grain size of?the tungsten?powder?is?coarse, medium and?fine. Alloys?containing?fine particles?than?coarse particles?containing?alloy, its performance?significantly improved;?if?alloy?containing?fine grain, the?performance can be?a qualitative leap, to achieve high?strength and?high hardness?unity?to extend its field of application.?Meanwhile, the metal?tungsten?in these areas?and their application?also?morphology,?particle size?distribution?has a close relationship.?This paper reviews recent?variety of?fine?tungsten powder?preparation method,?and compare the?different methods?of Ultrafine?Powder?advantages and disadvantages. Finally, in?the introduction to?this paper,?the production process?of the current selection of?the most