【作者】 杨英歌； 周海； 陈飞； 万汉城； 曾冬梅； 冯文然；

【Author】 YANG Ying-ge~* ZHOU Hai CHEN Fei WAN Han-cheng ZENG Dong-mei FENG Wen-ran Department of Materia Science and Techonology,Beijing Insisitute of Petro-Chemical Technology,Beijing 102617,China)

【机构】 材料科学与工程系北京石油化工学院；

【摘要】 低温气体多元共渗技术在提高材料表面硬度、耐磨性和耐蚀性等性能的应用方面取得一定的进展,但单一的表面技术往往具有一定的局限性,因此本文采用复合表面处理技术（低温气体多元共渗+高频感应淬火）对20钢表面进行处理,试样在650℃多元共渗2小时后,进行20s高频感应淬火得到渗层厚度为100um,显微硬度达到856HV,表面硬度比原始材料提高4倍多。摩擦学实验表明经多元共渗后20钢的摩擦系数最低为0.2,而原始材料摩擦系数为O.6,耐磨性提高一倍。这主要由于复合表面处理后的渗层由结构致密的的Fe₃N和Fe₂N等组成。更多还原

【Abstract】 Low temperature gas multicomponent penetrating has more progress in microhardness、wear resistance and corrosion resistance of materials,but simple surface treatment often has certain limitation.In this paper the effect of combination surface treatment which is consist of low temperature gas multicomponent penetrating and high-frequency induction hardening were studied on 20 steel.The modified layer which is composed of bright layer and transition layer,obtained a thickness of 100um at 650℃four two hours and high-frequency induction hardening for 20s.The microhardness of the modified layer attains 856HV after combination surface treatment,was over four more than the basis.The wear tests show that the friction coefficient of the modified layer is 0.2,which is distinctly lower than that of original sample.This is mainly because the modified layer is composed of such phases that have compact molecular structure and stable chemical properties as Fe₂N and Fe₃N.更多还原