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钛比重小,比强度高,具有优良的物理化学性能.但钛的硬度低,耐磨性差,在摩擦的条件下,工件易擦伤,产生粘着磨损,并且在某些介质中不耐蚀.为改善钛及其合金的耐磨性和耐蚀性,我们研究了空心阴极离子镀(HCD)技术,在钛及其钛合金上加涂了氮化钛涂层.结果表明,加涂氮化钛涂层的纯钛表面硬度,得到了大幅度提高,在25g负载,加载时间15s的试验条件下,其显微硬度值(HV)可达1800kg/mm~2.在浓度为79%室温条件下进行的H_2SO_4溶液浸泡试验表明,在0.379Pa氮分压沉积的氮化钛样品比纯钛耐蚀性提高了三个数量级,年腐
Titanium has a small specific gravity, high specific strength and good physicochemical properties, but its hardness is low and its abrasion resistance is poor. Under the conditions of friction, the workpiece is easily scratched, adhesively worn, and in some media not resistant to corrosion. In order to improve the wear resistance and corrosion resistance of titanium and its alloys, we studied the hollow cathode ion plating (HCD) technology and applied the titanium nitride coating to titanium and its titanium alloy. The results show that adding nitriding Titanium coated titanium surface hardness has been greatly improved in the 25g load, loading time 15s under the test conditions, the microhardness (HV) up to 1800kg / mm ~ 2. At a concentration of 79% room temperature conditions Under H_2SO_4 solution immersion test showed that the corrosion resistance of titanium nitride deposited at 0.379Pa nitrogen partial pressure than pure titanium increased by three orders of magnitude,