Preparation method for graphene-316L stainless steel based on selective laser melting

Abstract

The invention discloses a preparation method for graphene-316L stainless steel based on selective laser melting. The preparation method comprises the following steps that graphene powder and 316L powder are mixed to obtain 316L and graphene mixed powder; then, the mixed powder is subjected to selective laser melting block forming, the optimal technological parameters are obtained through analysisof density, mechanical properties, electrochemical corrosion and metallographic and microcosmic appearance, the exposure time is 100 microseconds, the dot pitch is 50 micrometers, the power is 210 W,the laser energy density is 49.35 J / mm < 3 >, and compared with pure 316L stainless steel, the graphene / 316 L stainless steel sample under the optimal technological parameters has the advantages thatthe yield strength is improved by 28%, the tensile strength is improved by 26%, and the corrosion resistance is improved.

Description

technical field [0001] The invention belongs to the technical field of additive manufacturing, and specifically relates to a method for optimizing the preparation process of 316L stainless steel based on selective laser melting graphene strengthening. The optimal process parameter range is obtained through density analysis, and combined with mechanical performance analysis and corrosion performance analysis, Supplemented by microscopic morphology analysis, the method of obtaining the optimal process parameters. Background technique [0002] Additive manufacturing technology (commonly known as "3D printing" technology) is a technology developed in the past 30 years that uses CAD, SolidWorks and other digital models to design data and accumulate materials layer by layer to manufacture solid parts. It has fast forming speed, short production cycle, It has the advantages of high material utilization rate, good material adaptability, no need for drawings and tooling equipment, an...

AI Technical Summary

Problems solved by technology

In the process of smelting and production of traditional stainless steel products, the utilization rate of raw materials is low, and the precision of processing dimensions is low, which cannot meet the requirements for the shape, mechanical strength and corrosion resistance of special-shaped and complex parts. The parts formed by selective laser melting have complex shapes, high precision and good mechanical properties.

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