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《Acta Armamentarii》 2006-06
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Investigation on Microstructure and Property of Low-carbon Steel Surface Strengthened Layer

XU Jin-yong~(1,2),SONG Yi-mei~1,GAO Yuan~1,YU Yun-jiang~1,XU Zhong~2(1.Guilin University of Electronic Technology,Guilin 541004,Guangxi,Chain;2.Taiyuan University of Technology,Taiyuan 030024,Shanxi,Chain)  
Mo-Cr penetrating layer on Q235 low-carbon steel was built up by double glow plasma surface metallurgy and then the technological process of ultra-saturated carbonization,quenching and low tempering was made.The fundament is that alloying elements Mo,Cr are penetrated into the carbon steels in a vacuum chamber by glow discharge sputtering.The surface to be tested is under the following conditions: the depth of coating is over 100μm and the contents of Mo,Cr in a alloyed surface layer of low-carbon steal are respectively about 20% and 10% and surface carbon content is 2.0% above after ultra-saturated carbonization.The abrasion experimental results show that the average friction coefficient is 0.1 and the average relative wearability is 2.25 times as much as one of GCr15.The alloy layer possesses a very strong ability against temper softening,its surface hardness still exceeds 595 HV_(0.025) after tempering for 4h at 690℃.Resistance to tempering of the alloy layer is similar to metallurgical HSS.
【Fund】: 国家自然科学基金资助项目(50374050)
【CateGory Index】: TG113
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