Nickel base alloy powder used for coating and preparing method of nickel base alloy powder used for coating

Abstract

The invention discloses nickel base alloy powder used for a coating. The nickel base alloy powder used for the coating comprises the following raw materials including, by weight, 1%-5% of magnesium, 35%-45% of cobalt, 7%-10% of chromium, 2%-5% of molybdenum, 2%-5% of boron, 3%-5% of silicon and 40%-50% of nickel. A preparing method of the nickel base alloy powder used for the coating includes thefollowing steps that the technological processes for preparing the base alloy powder include burdening, centrifuging, atomizing, screening, grinding, mixing, drying and screening; and in the burdeningprocess, hydrous magnesium sulfate, cobalt nitrate hexahydrate, chromic nitrate nonahydrate, erbium nitrate pentahydrate, boron powder, silicon dioxide and nickel nitrate hexahydrate with the corresponding proportions are taken, water is added for mixing, stirring is conducted for 2 min to 7 min through a stirring machine, and a mixture is obtained. By means of the nickel base alloy powder usedfor the coating and the preparing method of the nickel base alloy powder used for the coating, the anti-crack performance, the forming property, the technology stability and the component uniformity of the alloy powder in a laser cladding layer are fundamentally achieved and improved, and the requirements of urban pipelines and equipment for the comprehensive performance such as heat resistance, corrosion resistance, wear resistance and high strength of the cladding layer are met.

Description

technical field [0001] The invention relates to the technical field of nickel-based alloys, in particular to a nickel-based alloy powder for coating and a preparation method thereof. Background technique [0002] Nickel-based alloy powder is a widely used alloy powder on the market. It is mainly used for steel parts, wear-resistant, anti-corrosion, anti-rust, etc. The grades are divided into two types: high hardness and low hardness. High hardness is wear-resistant and anti-corrosion. Low-hardness restoration is being processed, and this powder is the most widely used type of self-fluxing alloy powder. It has excellent comprehensive performance, corrosion resistance, oxidation resistance, heat resistance, low stress abrasive wear resistance and good impact toughness. Low melting point, wide solid-liquid phase temperature range, strong wetting ability to various substrates and WC particles, etc., easy to operate. Excellent self-melting, wettability and spray-weldability. Th...

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Problems solved by technology

At present, some technologies can effectively treat sewage, sludge, acid and alkaline pollutants, etc., but because the equipment required by these technologies is carried out under a certain temperature and pressure, the thermal processing performance and durability of the materials of the equipment High temperature strength and corrosion resistance are required. Traditionally, nickel-based alloy layer is used for corrosion protection. However, the traditional nickel-based alloy layer has poor performance and cannot meet the overall needs.