Process Design of Strengthening and Toughening Treatment for 65Mn Steel by Powder RE-Boronizing Method under Low Temperature

Abstract:

In order to improve the surface wear-resistance and overall shock-resistance of 65Mn steel, effects of rare earth (RE) particle size, adding amount and boronizing time subjected to quenching and medium-temperature tempering treatment were studied systematically. Optimizing basic component of low-temperature boronizing reagent and RE types, the depth of boronizing layer was selected as main evaluation parameter through the orthogonal test of RE-boronizing. Experimental results show that, cerium oxide with particle size of 20nm and content of 4% has the best effect of accelerating boronizing process on 65Mn steel at 700°C for 9 h, and the depth of boronizing layer with RE-boronizing is about 3.3 times than without adding RE; meanwhile, the heart of 65Mn steel still keeps good strength and toughness due to temper troostite microstructure. It can be concluded that the strengthening and toughening treatment of low-temperature RE-boronizing can obtain hard-surface and tough-core properties on 65Mn steel.

• Periodical: Advanced Materials Research (Volumes 941-944)
• Pages: 1414-1419
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.941-944.1414
• Online since: June 2014
• Authors: Xiao Ming Yuan, Hong Yu Wang*, Yu Feng Zhao, Xiao Jing Xu, Man Cheng
• Keywords: 65Mn Steel, Boronizing Time, Low Temperature Re-Boronizing, Nanoscale Cerium Oxide, Re Component Design, Strengthening and Toughening

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