Phase transformations in functional coatings of tungsten carbon steels

International Conference on Mechanical Engineering, Automation and Control Systems 2017

机械制造;无线电电子学;计算机科学

Davydov, S.V.^1 ; Gorlenko, A.O.^1

Bryansk State Technical University, 50 letiya Oktyabrya Blvd, 7, Bryansk

241035, Russia^1

关键词: Composite gradients;    Diffusion mechanisms;    Functional coating;    Globular morphology;    High energy process;    Liquid phase state;    Method of complex;    Supercooled austenite;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/327/3/032024/pdf
DOI  :  10.1088/1757-899X/327/3/032024

学科分类：计算机科学（综合）

来源: IOP

【 摘 要 】

Structural and phase transformations in tungsten-containing functional coatings of carbon steels, obtained in high-energy processes of implanting tungsten carbide micropowders by the method of complex pulse electromechanical processing, were studied. It is shown that during thermoforce action in the deformation zone, an intensive austenization of steel occurs with the dissolution of a powder of tungsten carbide with the subsequent formation of composite gradient structures as a result of the decomposition of supercooled austenite supersaturated with tungsten both by the diffusion mechanism and by the spinodal decomposition mechanism. It is shown that individual zones of the tungsten-containing phases of the alloy are in the liquid-phase state and undergo spinodal decomposition with the formation of highly disperse carbide phases of globular morphology.