%0 Journal Article
%T The Effect of Rare Earth Elements on Impact Wear-Resistance of Soft Nitriding Layer<br>稀土元素对软氮化层抗冲击磨损性能的影响
%A Cheng Xianhua Liu Jiajun
%A <br>程先华
%A 刘家浚
%A 丁定远
%A 陆明炯
%J 摩擦学学报
%D 1990
%I 
%X In this paper two die steels 7Cr7Mo3V2Si and 4Cr3Mo3W4 VNb were chemically heat-treated by means of conventional soft nitriding and RE(Rare Earth)-soft nitriding, in which La, Ce and special solvent were added. The results of impact wear tests showed that the impact toughness and impact wear-resistance of the RE nitriding layers are better than the conventional nitriding layers'. The life time of a RE-nitrided hot die for screw of bicycles was increased about 1 and 3 times than that of conventionally nitrided dies. It has been also found through observation of impact wear surfaces on SEM that the larger wear debris are often flaked off from the conventional nitriding layers, whereas that from RE-nitriding layers are much smaller. Finally, the impact wear mechanism of RE-nitriding layers was discussed.
%K rare earcli elements
%K rare earth soft nitridina
%K soft nitri- ding layer
%K impact toughness
%K impact wear-resistance
%K wear mechanism<br>稀土元素
%K 稀土软氮化
%K 软氮化层
%K 冲击韧性
%K 抗冲击磨损性能
%K 磨损机理
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=5D344E2AD54D14F8&jid=2F467A5C6371C830162AAA01D7DAD07A&aid=3BFEB36F9C76C637C8C4184FB34261DA&yid=8D39DA2CB9F38FD0&vid=F3090AE9B60B7ED1&iid=E158A972A605785F&journal_id=1004-0595&journal_name=摩擦学学报&referenced_num=0&reference_num=0