摘要
利用强流脉冲电子束对不同厚度的电镀铬层进行表面改性处理,分析了处理后试样的表面形貌、表面硬度、截面硬度等的变化,并对电子束处理前后试样进行XRD分析。结果表明,对于厚6μm的镀层,电子束处理后表面出现网状"沟渠"形貌,随照射次数的增加,网状"沟渠"形貌越密集。对于厚1μm镀层,表面未出现"沟渠"形貌。在相同的电子束照射参数下,对于厚6μm镀层,表面硬度反而降低,截面硬度峰值相比原始未处理样品提高了8%。对于厚1μm镀层,表面硬度有所增加,截面硬度峰值相比原始试样提高了12%。此外对1μm电镀铬层电子束处理后,出现残余奥氏体相。
The surface alloying treatment of electroplated chromium layer with different thickness treated by HCPEB was carried out, and the changes of the specimen surface microstructure, surface microhardness, and cross-section microhardness were analyzed. The spectrum of samples before and after HCPEB surface treatment was analyzed by XRD. The results show that for the 6 μm thickness layer, the microstructure of reticular ditch appears on the surface after treated by HCPEB, and with the increase of pulse, this microstructure will become more intensive; for the 1 μm thickness layer, the microstructure of reticular ditch dyes ont appear on the surface after treated by HCPEB. With the same electron beam irradiation parameters, for the 6 μm layer, the surface microhardness reduces, and the cross-section microhardness increases by 8%; for the 1 μm layer, the surface microhardness enhances, and the cross-section microhardness increases by 12%. Besides, after the electroplated chromium layer with 1μm thickness treated by HCPEB, new residual austenite phase appears.
出处
《热加工工艺》
CSCD
北大核心
2013年第14期109-112,共4页
Hot Working Technology
基金
国家自然科学基金资助项目(51275548)
重庆市自然科学基金重点资助项目(cstc2012jjB0002)
