Effect of BH carburizing process on structure and properties of 12CrNi3 carburizing steel

doi:10.13251/j.issn.0254-6051.2021.04.031

Abstract

Abstract: Aiming to overcome the disadvantages of gas carburizing for thin-walled heavy-duty gears such as requiring high temperature and long process period, as well as uncontrollable large distortions and undesired microstructure, the BH carburizing process was adopted by adding BH-5 energizing agent based on the original gas carburizing process. The results show that when the carburized layer depth is (1.5±0.1) mm, the BH carburizing can improve the carburizing efficiency by more than 20%. The BH carburizing can refine the grain size of 12CrNi3 steel to grade 7, result in smoother hardness gradient for the carburized layer, improve friction performance, and reduce distortions.

Key words: 12CrNi3 steel, carburization, distortion, BH energizing agent, grain size, hardness, wear resistance

CLC Number:

TG142.1

Liu Ke, Yang Bin, Sun Lin, Ouyang Xuemei, Ding Hui, Zhu Xu. Effect of BH carburizing process on structure and properties of 12CrNi3 carburizing steel[J]. Heat Treatment of Metals, 2021, 46(4): 171-175.

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