Preparation technology of abrasion-resistant stainless steel alloy coating

Abstract

The invention discloses a preparation technology of an abrasion-resistant stainless steel alloy coating. The preparation technology includes the following steps that S1, raw materials are selected; S2, alloy powder is embedded into polytef; S3, a metal cloth is prepared and stacked; S4, brazing is conducted; and S5, the stainless steel surface is covered with the alloy coating. According to the preparation technology of the abrasion-resistant stainless steel alloy coating, tungsten carbide hard alloy powder and NiCrBSi self-fluxing brazing alloy powder are treated as hard phases and are rolledinto the cloth with the polytef, then the cloth adheres to the surface of stainless steel, then brazing is conducted to form a metallurgical bonded complex coating, and the flexible metal cloth can be adhered to the surface of a part of a complex structure; and thermal residual stress of the coating is small due to the fact that the metal cloth and a substrate are heated at the same time during brazing, the variation range of the thickness of the coating is large, surface roughness of the coating is small, thus the surface of the stainless steel has high abrasion resistance and erosion resistance, the grinding material abrasion resistant performance of the obtained coating is much higher than the grinding material abrasion resistant performance of a flame surfacing coating, and abrasion resistance and strength of extension of the stainless steel substrate are remarkably improved.

Description

technical field [0001] The invention belongs to the technical field of stainless steel alloys, and in particular relates to a preparation process of a wear-resistant stainless steel alloy coating. Background technique [0002] Stainless steel is the abbreviation of stainless acid-resistant steel, and the steel grades that are resistant to weak corrosive media such as air, steam, water, or have stainless properties are called stainless steel; The steel grade is called acid-resistant steel. Due to the difference in chemical composition of the two, their corrosion resistance is different. Ordinary stainless steel is generally not resistant to chemical medium corrosion, while acid-resistant steel is generally stainless. Stainless steel alloy coating refers to the protective layer coated on the surface of the workpiece. The protective layer protects the stainless steel and improves the wear resistance and corrosion resistance of the stainless steel. [0003] Tungsten carbide re...

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Problems solved by technology

Due to the large mismatch of thermal expansion coefficient and elastic modulus between tungsten carbide and nickel-based alloys, the coatings prepared by flame spraying and explosive spraying are prone to cracking or even peeling off due to the weak bonding force between the coating and the substrate during use; The residual stress of the coating prepared by surfacing welding technology is large, and the amount of machining is large; when the laser cladding process is used, tungsten carbide particles are easy to deposit on the bottom of the coating, which is difficult to strengthen the surface of the coating. Stress concentration occurs at the bottom, causing defects