不同氮化工艺对低碳钢离子镀铬的影响.docx

本文格式为Word版，下载可任意编辑不同氮化工艺对低碳钢离子镀铬的影响 摘 要 双层辉光（以下简称双辉）等离子外观合金化是具有我国独立学识产权，居世界领先水平的高技术，是外观工程技术的重要分支之一该技术是在离子氮化的根基上进展起来的，它较好地解决了供给欲渗活性金属原子方面的问题，将仅能举行非金属元素渗入的离子氮化技术拓宽成为能举行全体金属元素、非金属元素渗入的等离子渗金属技术，开创了等离子外观冶金的新领域 普遍碳钢举行双辉等离子低温外观渗镀铬，提高其耐磨性、耐腐蚀性、抗高温氧化性，从而提高产品性能，降低产品本金，延长产品寿命，提高产品的市场竞争才能，用其代替昂贵的合金材料，从而俭约资源，裁减消耗，推进可持续进展双辉等离子外观合金化技术与其它外观改性技术相比具有大量显著的优点，具有很大应用前途的实用技术，加速其实用化进程，将有利于产业化的推广 由于渗铬前氮化能促进铬在铁中的分散、渗铬后举行氮化有强化作用，故本课题研究不同氮化工艺对碳钢离子渗铬的影响，旨在改善低温渗铬的条件，提高渗层的以及整体工件的性能测验说明： （1）渗铬＋氮化与氮化＋渗铬＋氮化工艺，能大幅度提高碳钢外观硬度，外观强化层硬度可达HV750； （2）渗铬＋氮化外观强化层组织是由白亮层（ε相）＋氮化层＋基体组成，组织致密，与基体结合精细；氮化＋渗铬＋渗氮的渗层厚度较渗铬＋氮化的渗层厚度要深； （3）在水砂纸2000＃砂粒度为6μm的磨粒磨损处境下，渗铬＋氮化的试样在整个磨损过程的失重曲线的斜率最小，就是说其的耐磨性最好。

关键词:双辉等离子渗金属；Q235钢；渗铬；渗氮；工艺 Abstract Double glow discharge plasma surface alloying process is plasma surface modification technology,which was invented by Chinese scholars have their own intellectual property rights.This technology was developed on the ion nitriding,it was better to provide wishes to solve the infiltration activity of metal atoms,will be only for non-metallic elements into the ion nitriding technology can be widened for all metal elements,non-metallic elements such as the infiltration of Metal Ion technology,creating a plasma surface metallurgy new areas. Of ordinary carbon steel double glow discharge Plasma Surface chromium plating to enhance the wear resistance, corrosion resistance, high temperature oxidation resistance and improve its product performance, reducing the cost of products to extend the lifespan of products, improving product competitiveness in the market. Replace it with expensive alloy materials to saving resources, reducing consumption and promoting sustainable development. Double glow discharge plasma surface alloying technology compared with the other surface modification technology ,it has many significant advantages ，it has the practical technologies’ great of application, speed up the process of actually used, there will be conducive to the promotion of industrialization. Nitriding before the chromizing can promote the spread of the Chromium in the iron , nitriding can play a role in strengthening after chromizing, so the subject studys of the different c nitriding process’ effect in the ordinary carbon steel double glow discharge Plasma Surface chromium, the aimed to improving the conditions of the chromizing in the low temperature ,to improving the layer and the overall performance of the workpiece. Experiments show that: (1) The chromizing and nitriding’s and the second nitriding’s process, can greatly improve the carbon steel surface hardness ,and the hardness of the Strengthen surface layer is HV750; (2)The chromizing and nitriding’s surface infiltration of the organization is composed of the white layer (ε phase) and the nitride layerand the Matrix. The organization is dense, and work closely with the matrix.The Layer thickness of the second nitriding is abysmal of the chromizing and nitriding’s (3) With the 2000 water of sandpaper (the Size is 6 μ m) of abrasive wear ,the weightlessness of the curve of the slope of the chromizing and nitriding’s sample is smallest ,so its wearability is better . Key words: double glow discharge plasma surface alloying process; Q235steel; chromizing; nitriding; process 目 录 引言 ....................................................................................................................... 1 1 资料综述 ......................................................................................................... 2 1.1 渗铬的国内外研究状况 .................................................................................................. 2 1.2 渗铬的工业应用 .............................................................................................................. 2 1.2.1抗腐蚀的应用 ............................................................................................................ 2 1.2.2抗磨损的应用 ............................................................................................................ 2 1.2.3抗高温氧化及高温腐蚀的应用 ................................................................................ 3 1.3 等离子渗金属技术 ........................................................................................................ 3 1.3.1等离子体 .................................................................................................................... 3 1.3.2离子氮化原理 ............................................................................................................ 4 1.3.3辉光放电现象 ............................................................................................................ 5 1.4 双辉等离子渗金属技术 ................................................................................................ 7 1.4.1双辉等离子渗铬技术概况 ......................................................................................。