钛合金表面辉光离子渗铝耐蚀性

利用双层辉光离子渗金属技术,在钛合金(Ti6Al4V)表面渗Al,形成均匀的钛铝合金扩散层。用显微硬度仪测量渗层的显微硬度,用SEM、XRD分析渗层的截面形貌和相结构,并在0.5mol/LH2SO4溶液和3.5%NaCl溶液中测试极化曲线方法。结果表明:经950℃,保温5h后Ti6Al4V合金基材表面形成厚度约为20μm的钛铝合金扩散层,扩散层由金属间化合物Ti3Al和TiAl组成;合金表面显微硬度值达到8100MPa;钛合金表面的耐蚀性能提高。

加弧辉光离子渗铝的研究

介绍了加弧辉光离子渗铝新工艺,并对普通碳钢进行了加弧辉光离子渗铝处理。研究了10、60、T12钢渗铝后的渗层组织特点,渗层合金成分的分布、渗层相组成及工艺参数对铝层的影响规律。

离子渗铝粉末冶金供铝源

提出了一种用粉末冶金制成的离子渗铝的供铝源，并且用这种供铝源在辉光放电的条件下进行渗铝研究；结果表明，该方法渗入速度快，表面质量好，可以在任何部位进行局部或整体渗入。

弧光离子渗铝及其机理的探讨

研究了弧光离子渗铝工艺参数(时间、温度、气压)对渗层的影响规律,并通过研究电弧源发射出的铝离子特性、渗层组织特点、渗层合金成分的分布等探讨弧光离子渗铝的扩散机理。

离子渗铝的粉末冶金供铝源及其应用

本文提出了一种用粉末冶金制成的离子渗铝时的铝供给源,并用这种供铝源在辉光放电的条件下进行了渗铝研究。结果表明,该法渗入速度快,表面质量好。可在任何部位进行局部或整体渗入。

空心阴极辉光放电膏剂离子渗铝

文中提出了一种新的渗铝方法-辉光加热膏剂渗入法,将涂有渗铝膏剂的试样置于阴极空腔中,在辉光放电作用下实现离子渗铝。渗铝膏剂经优选,选出最佳配方:(wt％)Al 40％,Na_3AlF_6 5％,KBF_4 5％,SiC 50％,用此配方在低碳钢表面1050℃×2h渗铝,其渗铝层厚度可达230μm。渗铝后,试样的抗氧化性可提高2～3倍。此方法具有渗入速度快,表面质量好,可方便地实现局部渗铝等优点。文中还讨论了渗铝机理。

辉光加热膏剂渗铝

本文提出了一种新的渗铝法——辉光加热膏剂法。着重进行了渗剂配方的优选,并对渗铝层的抗氧化性进行了研究。

High Density Plasma Nitriding of Al-Cu Alloys for Automotive Parts

Duralumin alloys have been utilized as structural components and parts for aircrafts, train-cars and so forth. Their high specific strength was attractive to those applications; however, their little corrosion resistance and low wear endurance became a fatal demerit in practical applications. In order to overcome these issues of high strength aluminum alloys, high density plasma nitriding is proposed as an effective surface treatment for duralumin. This process has a capability to control the RF- and DC-plasmas independently for nitriding. This enables us to temporally control and describe the plasma state by in-situ plasma diagnosis. This plasma diagnosis was instrumented to search for optimum processing condition to plasma nitriding the duralumin alloys of type A2011. Both type A2011 aluminum alloy plates and pipes were employed to describe the inner nitriding behavior for hardening the duralumin alloys by the present plasma nitriding.