07.2021.418.423

Influence of carbon potential (Cp) on microstructure and hardness of 20CrNi steel

Author(s):

Long Vuong Hoang, Minh Nhat Nguyen‡,*, Hung Chien Do‡†, Duong Nam Nguyen‡‡,*, Anh Tuan Vu‡‡, Dinh Tuyen Nguyen‡†,*

Affiliation(s):

Faculty of Mechanical Technology, Industrial University of Ho Chi Minh City, Ho Chi Minh city, Vietnam

Institute of Engineering, Ho Chi Minh City University of Technology (HUTECH), Ho Chi Minh city, Vietnam

‡† Institute of Mechanical Engineering, Ho Chi Minh City University of Transport, Ho Chi Minh city, Vietnam

‡‡ School of Mechanical Engineering, Vietnam Maritime University, Hai Phong, Viet Nam

Corresponding Author Email: namnd.khcs@vimaru.edu.vn; nguyendinhtuyen8899@gmail.com; nm.nhat@hutech.edu.vn

This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

This article presents about effect of temperature on the Cp potential of the carbonitriding medium. Using the sensor has determined the permeability potential with different modes is 0.66; 0.86 and 1.07. From the experimental results on the influence of gas flow (with different Cp values), the hardness distribution from the surface to the core of the steel has been determined. By the results of the analysis of the microstructure, it has been shown that the permeable layer on the surface of 20CrNi steel. The microstructure obtained here is the carbide; nitride and residual austenite. The results also show the influence of Cp on the microstructure of the research steel.