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Title:: Research Progress on Toughness and Plasticity of Laser Cladding Fe-Based Amorphous Alloy Composite Coatings

Author(s):: ZHANG Kai; MAO Pengzhan; HUO Jiaxiang; LIU Wei; ZHANG Lei; FU Li; CHEN Xiaoming; 1. Key Laboratory of Surface Engineering of Equipment for Hydraulic Engineering of Zhejiang Province,Standard & Quality Control Research Institute, Ministry of Water Resources, Hangzhou 310012, China 2. Water Machinery and Remanufacturing Technology Engineering Laboratory of Zhejiang Province,Hangzhou Mechanical Research Institute, Ministry of Water Resources, Hangzhou 310012, China et al.

Keywords:: iron-based amorphous; laser cladding; alloy; composite coating; toughness; plasticity

Abstract:: Fe-based amorphous alloys are promising for industrial applications because of their excellent mechanical, chemical and physical properties and low cost.However, the development of Fe-based amorphous alloys in the field of coating applications has been restricted by the lack of toughness and plasticity.To address this issue, researchers have conducted extensive studies on laser cladding preparation processes and elemental formulations to investigate the mechanism of plasticizing and toughening effects of amorphous and crystalline dual-phase coexistence, yielding fruitful results. Scholars have pointed out that the coexistence of amorphous phase and crystalline phase can effectively improve the toughness or plasticity of Febased amorphous alloy composite coating. The grain size, structure and distribution of crystalline phase have a great influence on the toughness or plasticity of Fe-based amorphous alloy composite coating.In this paper, the research progress of laser cladding iron based amorphous alloy composite coating plasticizing and toughening is summarized in terms of laser process parameters, element formulation and auxiliary methods in recent years.The main existing problems are analyzed, and the future development direction is forecasted.