Application of Plasma Cladding Ni60A+35wc Wear-resistant Layer on Agricultural Machinery Knives（2）

       

Among the many surface modification treatment technologies of metal materials, the cladding treatment technology has the advantages of thick cladding layer, high quality of cladding layer, adjustable composition of cladding layer, etc., and is to a large extent suitable for processing with relatively high wear resistance requirements. High work surface. In recent years, the study of laser cladding has become a research hotspot in surface modification of metal materials. At the same time, cladding methods that use high-frequency induction and electron beams as heat sources are also emerging. However, there are still few studies on plasma arc as a heat source for cladding. Plasma arc has the advantages of concentrated heat, high energy density, and high flexibility. Although its energy flow density is far lower than that of laser beams, its heat is enough to melt various materials. Therefore, the use of plasma arc to achieve cladding is another effective melting. Overlay processing technology. Nickel-based self-fluxing alloys are widely used in the field of surface strengthening due to their excellent wear resistance. It is one of the earliest series and commercialized powders in surface technology. For this type of material, the thermal spraying process is generally used for the preparation of the wear-resistant layer. However, this process has disadvantages such as small thickness of the wear-resistant layer, cracks and peeling, high material loss, and high cost. To this end, this paper studies the structure, performance and wear resistance of the Ni60 cladding layer by plasma arc cladding. The research results can provide practical references for the manufacture and remanufacturing of agricultural machinery tools.