A Plasma Spraying Method Applicable to Small Diameter Ring Parts

Abstract

The invention discloses a plasma spraying method suitable for small-diameter ring parts, which belongs to the field of thermal spraying processing, and comprises the following steps in sequence: using a grinding wheel to blast the surface roughness of the parts to be sprayed to 2 μm-3.5 μm, and using compressed air to Blow off the residual sand on the parts to be sprayed; clamp multiple parts to be sprayed on the spraying fixture in sequence, and only expose the area to be sprayed of the parts to be sprayed; put the nickel-chromium chromium carbide powder into the powder feeding mechanism of the plasma spray gun ; Set the spray gun to move in a "Z shape" along the vertical direction of the part's rotation axis for spraying; the invention makes the spraying flame cover more comprehensively on the part surface, improves the spraying processing efficiency, and lengthens the heating gap time of each part, and the part surface The temperature is not easy to overheat.

Description

technical field [0001] The invention relates to the field of thermal spraying processing, in particular to a plasma spraying method suitable for small-diameter rings. Background technique [0002] Thermal spraying refers to a method in which the coating material is heated and melted, atomized into extremely fine particles by high-speed airflow, and sprayed onto the surface of the workpiece at a high speed to form a coating. According to the needs, different coating materials can be selected to obtain one or more properties in terms of wear resistance, corrosion resistance, and oxidation resistance. The thermal spraying process has been widely used in aerospace aircraft, military and civil aircraft and ship engines. With the increasing application of sprayed parts, how to improve the processing efficiency of parts and reduce production costs has become one of the core competitiveness of enterprises to occupy the market. [0003] Generally, ring-shaped parts can be placed in...

AI Technical Summary

Problems solved by technology

For small-diameter ring parts, that is, ring parts with a diameter less than φ100mm (such as shafts, pipes, bushings, etc.), there are the following problems in spraying parts in this way: continuous spraying will cause the parts to overheat easily and burn out the parts; Processing a part, clamping, spraying start and stop, etc. will waste a lot of time, affect work efficiency, and increase production costs

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