Chinese Journal of Materials Research  2015, Vol. 29 Issue (7): 481-488    DOI:

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Effect of Rare Earth Ce on High Temperature Friction and Wear Property of Pack Boronized H13 Steel

PU Shengjun, YANG Haopeng, WANG Hongbin, WU Xiaochun

School of Materials Science and Engineering, Shanghai University, Shanghai 200072, China

PU Shengjun, YANG Haopeng, WANG Hongbin, WU Xiaochun. Effect of Rare Earth Ce on High Temperature Friction and Wear Property of Pack Boronized H13 Steel. Chinese Journal of Materials Research, 2015, 29(7): 481-488.

Abstract Related Articles Recommended Metrics Download:  PDF(6207KB)  Export:  BibTeX | EndNote (RIS)       Abstract  H13 steel was boronized by pack cementation process with CeCl3 containing powder mixture and the effect of the CeCl3 amount in the powder mixture on the microstructure, microhardness, surface roughness and phase composition of the formed boronizing layer on H13 steel was characterized, while the high temperature friction and wear properties of the boronized steel were also studied. The results show that the thickness, microhardness and densification of the boronizing layers were enhanced significantly by adding 2.5% and 5% CeCl3 in the powder mixture, while the surface roughness was increased slightly. With 10% CeCl3 in the powder mixture, the thickness of boronizing layer reached a maximum, but its microhardness and densification decreased obviously, while the surface roughness increased to Ra3.32. In addition to Fe2B phase, (Fe, Cr)2B phase appears in the boronizing layer. Compared to the boronized steel prepared with the powder mixture free of CeCl3, the worn out time for the boronized steel prepared with the powder mixture containing 5% CeCl3 prolonged two times with a wear rate 21% lower. The boronized steel with the powder mixture containg 5% CeCl3 exhibited better wear resistance rather than the bare steel as well as the steel boronized with the powder mixture containg 10% CeCl3.. Thus, the boronized steel with the powder mixture containg 5% CeCl3 possesses relatively superior high temperature wear performance. Key words:  metallic materials      rare earth element      pack boriding      wear resistance at elevated temperature      ZTFLH:  TH117   Fund: Supported by the Leading Academic Discipline Project of Shanghai No.S30107. 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