Molybdenum boride ceramic system hot spray coating material, and preparation method and application of molybdenum boride ceramic system hot spray coating material

Abstract

The invention relates to a molybdenum boride ceramic system hot spray coating material which comprises the following ingredients by mass percentage: 60-80% of MoxBy, 10-30% of Ni or Co, 5-20% of Cr, and 0-5% of WmBn, wherein MoxBy is at least one of MoB or MoB2, and WmBn is at least one of WB or WB2 or W2B5. The molybdenum boride ceramic system hot spray coating material having significant advantages in aspects of thermal erosion resistance, high-temperature skimming wear resistance, molten metal erosion resistance and the like is prepared via unique raw material selection and proportion, as well as corresponding technical steps and parameter limitation, and is particularly applicable to surface hot spraying of spare parts such as sink rolls, stable rolls and shaft sleeves of a garbage incinerator and a hot galvanizing production line.

Description

technical field

[0001] The invention belongs to the technical field of surface engineering and thermal spraying, and in particular relates to the preparation and application of a molybdenum boride ceramic thermal spraying coating material. Background technique

[0002] Workpieces working in some special high temperature or molten metal corrosion environment, the surface often has to withstand the test of high temperature metal erosion, thermal load caused by alternating cold and hot, and some special friction, so a special coating is required technology to meet these demanding requirements. At present, commonly used coatings include surface boronizing, HVOF spraying WC-Co or Fe-Al, plasma spraying ceramic coatings, etc. Although the above solutions can achieve certain results, the coating performance is still not enough in harsh environments. Satisfying. For example, the surface of the boronized coating is easy to crack, which leads to protection failure. The HVOF sprayed ...

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