Effect of Rare Earths on Structure and Properties of Carbonitriding Boronizing Combined Treatment
The microstructure, thickness, microhardness and wear resistance of single-boronizing, carbonitriding+boronizing and carbonitriding+RE- boronizing layers of 16Mn steel were investigated respectively. Effect of rare earths on microstructure and properties of the penetrated layer were studied and the mechanism of effects of rare earths was discussed. The result showed that the structure, microhardness, brittleness and wear resistance of the penetrated layer after carbonitriding+RE-boronizing were better than that of conventional boronizing and carbonitriding, especially the wear resistance of boronized layer was increased remarkably. The RE- boronizing layer of the steel is single phase Fe<,2> B, and RE elements enhanced Fe<,2>B (002) direction texture. The distribution of rare earth element (La) in the layer was non-uniform. RE content is higher between borides than that of the interior of borides. An optimum value of the addition of RE element in the agent was 8％. The average service life of the 16Mn steel brickmould treated by carbonitriding+RE- boronizing was 1.5 times as long as the service life of the mould treated by carbonitriding-boronizing.
boronizing carbonitriding structure properties rare earths
Ye Hong (叶宏) Yan Zhonglin (闫忠琳) Tian Zhongqing (田中青)
School of Materials Science and Engineering, Chongqing Institute of Technology, Chongqing 400050, Ch School of Materials Science and Engineering,Chongqing Institute of Technology, Chongqing 400050, Chi
国际会议
第五届国际稀土开发与应用研讨会(The Fifth International Conference on Rare Earth Decelopment and Applicatin)
包头
英文
415-418
2007-08-07（万方平台首次上网日期，不代表论文的发表时间）