離子氮化的工藝研究

機(jī)械設(shè)計(jì)制造及其自動(dòng)化論文，論文編號(hào):JX1014  論文字?jǐn)?shù):18232.頁(yè)數(shù):33

摘     要
 
 本論文針對(duì)工程材料的表面的改性問題，通過先進(jìn)的離子氮化技術(shù)來改善工件表面的性能，使工件的硬度，耐磨性，抗腐蝕性以及抗咬合性得到加強(qiáng)。離子氮化憑借其時(shí)間短，節(jié)能的特在各個(gè)機(jī)械領(lǐng)域中的得到廣泛的應(yīng)用。本文深入研究離子氮化的基本理論，提出了對(duì)離子滲氮設(shè)備和工藝的要求。不同化合物的滲氮層的性能各不相同，滲氮層里層的擴(kuò)散層和過渡層也有各自的性能。本文還研究了基于滲氮溫度和氮?jiǎng)輰?duì)滲氮層形成與分解的影響規(guī)律，離子氮化滲層相組成和微觀組織形貌進(jìn)行了深入研究，了解了經(jīng)過氮化后的工件表面的性能。離子滲氮能顯著地增加材料的滲氮層深，而且使合金氮化物種類明顯增多，擴(kuò)散層中的沉淀硬化物也更細(xì)小彌散，有利于改善滲氮層質(zhì)量和提高滲氮工件性能。
 合金鋼的表面滲氮處理主要是用H11、38CrMoAl、3Cr2Mo8V、40Cr模具鋼材料進(jìn)行不同時(shí)間的氮化，所采用的設(shè)備是30KW的L-30輝光離子氮化爐。
 
關(guān)鍵詞：離子氮化  微觀組織形貌
 
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  錄
摘     要 i
Abstract ii
目  錄 iii
第一章 緒  論 1
1.1 離子氮化研究的目的 1
1.2 離子氮化研究的背景 1
1.3 離子氮化研究方法與系統(tǒng)描述 2
1.4 離子氮化內(nèi)容概述 2
第二章 離子氮化的研究 3
2.1 離子滲氮工藝 3
2.1.1 離子滲氮工藝特點(diǎn) 3
2.1.2 離子滲氮材料選擇及預(yù)處理 4
2.2 離子輝光原理及特點(diǎn) 5
2.2.1 離子滲氮的工藝原理 6
2.2.2 離子滲氮的操作 8
2.2.3 氮化溫度和時(shí)間 9
2.2.4 離子滲氮設(shè)備的組成 10
第三章 金相顯微試樣的制備 12
3.1 概述 12
3.2 金相顯微的制備方法 12
3.2.1 取樣 12
3.2.2 鑲嵌 13
3.2.3 磨制 13
3.2.4 拋光 14
3.2.5 浸蝕 15
第四章 離子滲氮的微觀結(jié)構(gòu) 17
4.1 離子氮化的顯微組織 17
4.2 離子氮化化合物層的相組成 18
4.2.1 滲氮層深度和相組成與滲氮時(shí)間的關(guān)系 20
4.2.2 氨流量變化對(duì)滲氮層物相的影響 21
4.2.3 滲氮層ε相轉(zhuǎn)變與滲氮溫度的關(guān)系 21
4.3 離子氮化擴(kuò)散層的性能 22
第五章 結(jié)論 24
參考文獻(xiàn) 25
致  謝 26
附錄 27