离子氮化的工艺研究

机械设计制造及其自动化论文，论文编号:JX1014  论文字数:18232.页数:33

摘     要
 
 本论文针对工程材料的表面的改性问题，通过先进的离子氮化技术来改善工件表面的性能，使工件的硬度，耐磨性，抗腐蚀性以及抗咬合性得到加强。离子氮化凭借其时间短，节能的特在各个机械领域中的得到广泛的应用。本文深入研究离子氮化的基本理论，提出了对离子渗氮设备和工艺的要求。不同化合物的渗氮层的性能各不相同，渗氮层里层的扩散层和过渡层也有各自的性能。本文还研究了基于渗氮温度和氮势对渗氮层形成与分解的影响规律，离子氮化渗层相组成和微观组织形貌进行了深入研究，了解了经过氮化后的工件表面的性能。离子渗氮能显著地增加材料的渗氮层深，而且使合金氮化物种类明显增多，扩散层中的沉淀硬化物也更细小弥散，有利于改善渗氮层质量和提高渗氮工件性能。
 合金钢的表面渗氮处理主要是用H11、38CrMoAl、3Cr2Mo8V、40Cr模具钢材料进行不同时间的氮化，所采用的设备是30KW的L-30辉光离子氮化炉。
 
关键词：离子氮化  微观组织形貌
 
Abstract
 This paper against the surface of the modified problem, through advanced technology to improve nitrogen-surface performance, so that part of hardness, abrasion resistance, corrosion resistance and the strengthening of anti-bite. Ion nitride, with its short time, the special energy-saving machinery in all areas of broad application. In this paper, in-depth study of the plasma Nitride basic theory, put forward on the plasma nitriding equipment and technology requirements. Different compounds nitriding of the performance of different, nitriding layer, layer and the spread of the transition layer also have their own performance. This article is also based on the nitriding temperature and nitrogen potential of nitriding of the formation and decomposition of the impact of laws. Ion nitride layer of the composition and microstructure morphology has conducted in-depth research. Nitride understanding of the surface after the performance has been learned. Ion nitrogen can contribute significantly to the increase of nitriding layer deep. Nitride and the types of alloys have markedly increased. The proliferation of precipitation hardening of more small dispersion, Nitriding help improve the quality of the workpieces nitriding and improve performance.
         Alloy steel surface nitriding treatment is mainly used H11、38CrMoAl、3Cr2Mo8V、40Cr Die steel materials from time to time nitride. The equipment is used by the 30KW glow of the L-30-nitride furnace.

Keywords：Ion Nitriding  Microstructure

目  录
摘     要 i
Abstract ii
目  录 iii
第一章 绪  论 1
1.1 离子氮化研究的目的 1
1.2 离子氮化研究的背景 1
1.3 离子氮化研究方法与系统描述 2
1.4 离子氮化内容概述 2
第二章 离子氮化的研究 3
2.1 离子渗氮工艺 3
2.1.1 离子渗氮工艺特点 3
2.1.2 离子渗氮材料选择及预处理 4
2.2 离子辉光原理及特点 5
2.2.1 离子渗氮的工艺原理 6
2.2.2 离子渗氮的操作 8
2.2.3 氮化温度和时间 9
2.2.4 离子渗氮设备的组成 10
第三章 金相显微试样的制备 12
3.1 概述 12
3.2 金相显微的制备方法 12
3.2.1 取样 12
3.2.2 镶嵌 13
3.2.3 磨制 13
3.2.4 抛光 14
3.2.5 浸蚀 15
第四章 离子渗氮的微观结构 17
4.1 离子氮化的显微组织 17
4.2 离子氮化化合物层的相组成 18
4.2.1 渗氮层深度和相组成与渗氮时间的关系 20
4.2.2 氨流量变化对渗氮层物相的影响 21
4.2.3 渗氮层ε相转变与渗氮温度的关系 21
4.3 离子氮化扩散层的性能 22
第五章 结论 24
参考文献 25
致  谢 26
附录 27