Microstructure and Bonding Strength of Aluminum Bronze on ASTM 1045 Steel by CMT welding

2018 3rd International Conference on Advanced Materials Research and Manufacturing Technologies

材料科学;机械制造

Zhang, X.M.^1 ; Sun, K.^1 ; Gong, X.H.^1 ; Jiang, C.M.^1 ; Zhou, J.^1,2 ; Xue, F.^1,2

Jiangsu Key Laboratory for Advanced Metallic Materials, Southeast University, Nanjing

211189, China^1

Jiangsu Key Laboratory of Advanced Structural Materials and Application Technology, Nanjing Institute of Technology, Nanjing

211189, China^2

关键词: Bonding strength;    Destructive testing;    Interfacial microstructure;    Medium-carbon steels;    Short circuiting transfer;    Steel substrate;    Transition layers;    Welding parameters;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/436/1/012019/pdf
DOI  :  10.1088/1757-899X/436/1/012019

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

The effect of welding parameters on metallographic microstructure of aluminum bronze, interfacial microstructure and bonding strength of aluminum bronze and steel substrate has been studied. A cladding of aluminum bronze was obtained on the surface of medium carbon steel by CMT welding and short circuiting transfer welding. The microstructure of aluminum bronze and the interfacial microstructure of the interface between aluminum bronze and steel substrate have been systematically investigated. Sample 1-4 are α + (α + γ 2) microstructure of typical aluminum bronze. As for Sample 5, iron-rich particles and dendrites were distributed on the α-Cu crystal matrix. The bonding strength of aluminum bronze and steel substrate has been collected according to the destructive testing method of the bimetallic bonding strength of sliding bearing. Among the five samples, Sample 4 and Sample 5 had the highest bonding strength (528.17MPa and 511.39Mpa, respectively).The reason for the enhancement of the bonding strength was discussed. In the interface of aluminum bronze and steel substrate, the transition layer will get thicker when the interdiffusion distance between Fe and Cu elements is larger, it would be more conducive to increase the bonding strength.