High corrosion resistant antiwear iron base heat spray coating layer material and its preparation method

Abstract

The invention relates to coating materials of iron base alloy with high corrosion and wear resistance, and preparation method. 1) Hot spraying materials are wires processed by using metallic tapes covering metal-powder. 2) Hot spraying materials have high ability of forming amorphous, whose components are as follows: 13-20% Cr, 0.2-5% Mn, 0.2-5% B, 0.05-1% C, 0.1-0.5% Si, 0.02-0.5% of S and P. At least one of the following alloy elements is selected: (1) One or more of Al, Ga and Sn is contained. (2) One or more of Mo, W and V is contained. Total of the two group of alloy element is more than 0.5%. The rest is Fe. 3) Coats getting directly by hot spraying are composite materials of amorphous and nanocrystalline, which have both wear resistance and corrosion resistance. Based on simple preparation and low cost, coats are applicable for field construction.

Description

technical field [0001] The invention belongs to the field of thermal spraying, and relates to a highly corrosion-resistant and wear-resistant iron-based alloy coating material and a preparation method thereof. Background technique [0002] Amorphous and nanocrystalline alloys have unique and excellent properties. The long-range disorder of amorphous alloys causes it to exhibit excellent mechanical and chemical properties, such as high strength, high hardness and corrosion resistance. Nanocrystalline alloys have higher strength and hardness due to the grain size reaching the nanoscale, and at the same time Has good toughness. However, due to the difficulty in controlling the preparation process, the product forms of amorphous and nanocrystalline alloys have been mainly thin strips, filaments, powders, etc. for a long time, and the thickness or diameter is only tens of microns. It is difficult to obtain a large size and thickness, which limits the their application in engine...

AI Technical Summary

Problems solved by technology

[0007] In short, at present, in the thermal spraying technology, plasma spraying and high-speed flame spraying technology are mainly used to prepare amorphous nanocrystalline composite coatings. Most of the materials used are pre-prepared amorphous powders, and the process is relatively complicated. The layer is a single amorphous coating or nanocrystalline coating, which cannot give full play to the respective performance advantages of amorphous and nanocrystalline

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