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利用双层辉光离子渗金属技术,在Q235钢表面合成TiN渗镀层,从渗镀层厚度、相结构、表面形貌、表面成分、外观和表面显微硬度等方面研究不同的Ar、N2流量比对形成TiN渗镀层的影响。结果表明,A、rN2流量比对合成TiN渗镀层的厚度基本无影响;随着Ar、N2流量比的降低,TiN渗镀层由(200)转化为(111)择优取向生长;在各流量比下的渗镀层均呈“胞状”形貌,但流量比越低,胞状向外“突起”现象越明显,渗镀层越致密,表面硬度也相对越高;当流量比为8∶1时,TiN渗镀层表面Ti、N原子个数比最接近1∶1;TiN渗镀层表面颜色随着Ar、N2流量比的变化而不同,其实质是渗镀层中ε-Ti2N相、α-Fe相和ε-TiN相的含量不同,随着N2比例的提高,TiN渗镀层颜色由浅黄—黄色—金黄—深黄色变化,金黄色的渗镀层表面硬度最高;最佳Ar、N2流量比参数为8∶1,此时TiN渗镀层表面显微硬度平均值最高,达到了3120 HV0.05。
The TiN infiltration coatings were synthesized on the surface of Q235 steel by double glow plasma infiltration metal plating. The effects of different Ar and N2 flow ratios on the thickness, phase structure, surface morphology, surface composition, appearance and surface microhardness were studied. On the formation of TiN seepage layer. The results show that the flow ratio of A and rN2 has no effect on the thickness of the TiN composite. With the decrease of the flow ratio of Ar and N2, the TiN coating grows from (200) to (111), and at each flow ratio Of the infiltration layer showed “cell ” morphology, but the lower the flow ratio, cell outward “protrusion ” the more obvious the phenomenon, the more dense diffusion layer, the surface hardness is relatively higher; when the flow ratio is 8: 1 , The ratio of the number of Ti and N atoms on the surface of TiN coating is the closest to 1: 1. The surface color of TiN coating varies with the flow ratio of Ar and N2. The essence of TiN coating is ε-Ti2N phase and α-Fe The content of phase and ε-TiN phase is different. With the increase of N2 ratio, the color of TiN coating changes from light yellow to yellow to golden yellow to dark yellow, and the surface hardness of golden yellow coating is the highest. 8: 1, at this moment the surface microhardness of TiN infiltration layer has the highest average, reaching 3120 HV0.05.