Influence of process parameters to composite interface organization and performance of liquid/solid bimetal

4th Global Conference on Materials Science and Engineering

Rong, S.F.^1 ; Zhu, Y.C.^1 ; Wu, Y.H.^1 ; Yang, P.H.^1 ; Duan, X.L.^1 ; Zhou, H.T.^2

Institute of Materials Science and Engineering, Jiamusi University, 154007, China^1

School of Materials Science and Engineering, Harbin Institute of Technology, 154001, China^2

关键词: Element distribution;    Influence of process parameters;    Interface mi-crostructure;    Interface structures;    Liquid to solid ratio;    Metallurgical bonding;    Pouring temperatures;    Preheating temperature;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/103/1/012032/pdf
DOI  :  10.1088/1757-899X/103/1/012032

来源: IOP

【 摘 要 】

The liquid-solid composite technique was used to prepare the high carbon high chromium steel (HCHCS) and low alloy steel (LCS) bimetal composite materials by means of insert casting method. The influence of some process parameters such as liquid-solid ratio, preheat temperature, pouring temperature on the interface microstructure and mechanical properties were studied. Interface microstructure and element distribution were analyzed. The results show that the interface microstructure becomes better, and bonding area becomes thicker with the increase of the volume of liquid to solid ratio, preheating temperature and pouring temperature. When the liquid-solid ratio is 8:1, the preheating temperature is 300°C and the pouring temperature is 1565°C, a good metallurgical bonding area without any hole can be obtained with the interface combination of diffusion and fusion. The composite interface structure was composed of a core material diffusion layer, a cooling solidification layer, a direction growth layer and some cell particles. The elements of C, Cr and Mn diffuse from the HCHCS side to the alloy steel side. The microhardness increased in the gradient from the LCS side to the HCHCS. The microhardness of the interface is significantly higher than that of LCS.