A high-performance powder steel thermal spray deposition molding process

Abstract

The invention discloses a high-performance powder steel thermal spray deposition molding process, which belongs to the field of powder steel manufacturing technology. It is a high-performance powder steel thermal spray deposition molding process. The liquid block is injected into the mixing chamber, and the solid input pipe introduces the metal powder into the mixing chamber, so that the magnetized metal powder is mixed with the liquid metal. The filter plate guides the flow, so that the metal powder and part of the atomized metal liquid enter the inner guide column, and the other part of the atomized metal liquid flows through the outer guide column, so that the outer layer sprayed out of the guide tube is the atomized metal liquid. The inner layer is a double-layer jet fluid of a mixture of metal powder and atomized metal liquid, which can realize the spray deposition of powder steel through the double-layer jet fluid. The solid particles are evenly distributed.

Description

technical field [0001] The invention relates to the field of powder steel manufacturing process, more particularly, to a high-performance powder steel thermal spray deposition molding process. Background technique [0002] The principle of jet deposition technology is: the molten metal flowing out of the flow pipe is broken by the high-speed air flow at the atomization spray outlet, and atomized into a fine and dispersed droplet jet. The air flow conducts heat exchange. Among them, the droplets smaller than a certain critical size solidify into solid particles, the larger size droplets are still liquid, and the intermediate size droplets are semi-solidified particles containing a certain proportion of liquid phase. These solidification degrees are different After the molten droplets hit the deposition surface at high speed, they attach, spread, accumulate and fuse with the surface to form a thin semi-liquid layer, and then solidify and crystallize sequentially, gradually dep...

AI Technical Summary

Problems solved by technology

[0003] Spray deposition technology is used to prepare metal matrix composite ingots. In the current research and practice, most of the intubation method is used to directly spray the reinforced solid phase particles into the metal melt atomization cone, but this method is not easy to ensure the solid phase Uniform distribution of particles in the deposited body with low material utilization

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