Selective laser melting (SLM) of  316L stainless steel powder  is a rapid prototyping technique that uses a laser to melt layers of metal powder and build them up to form three-dimensional objects. 

The following is the possible content of the research on the rapid prototyping process of 316L stainless steel powder selective laser melting:

Material properties and pretreatment: Perform performance analysis on 316L stainless steel powder, including powder shape, particle size distribution, fluidity and oxidation degree, etc. According to the analysis results, select the appropriate powder characteristics, and carry out the necessary pretreatment, such as screening, deoxidation, etc., to ensure the quality and performance of the material.

Process parameter optimization: study the influence of process parameters such as laser power, scanning speed, scanning strategy, and layer thickness on melting quality and molding speed. Through experiments and simulation analysis, the optimal combination of process parameters is determined to achieve high-quality molded parts.

Quality evaluation of formed parts: quality evaluation of 316L stainless steel samples after laser melting and forming. Including detection and analysis of surface quality, dimensional accuracy, compactness, defect detection, etc. The microstructure and surface properties of formed parts are observed and evaluated by optical microscope, scanning electron microscope and other tools.

Microstructure and performance research: The microstructure and mechanical properties of 316L stainless steel laser melting formed parts were studied by metallographic microscope, tensile test, hardness test and other methods. Evaluate the grain size, phase composition, strength, plasticity and other properties of materials, and compare and analyze them with materials prepared by traditional methods.

Heat treatment and post-treatment: The effects of heat treatment and post-treatment on the properties of 316L stainless steel laser melting formed parts were investigated. Optimize the heat treatment parameters such as annealing temperature and holding time to improve the mechanical properties and stability of the material. Research post-treatment methods such as residual stress relief, polishing and surface treatment to improve the surface quality and performance of formed parts.

Process optimization and defect control: For possible defects, such as pores, cracks, residual stress, etc., conduct process optimization and defect control research. Reduce or eliminate molding defects by adjusting process parameters, optimizing scanning path, controlling energy density, etc.

Application performance evaluation: For specific application fields, perform performance evaluation on 316L stainless steel laser melting molded parts. Including tests on corrosion resistance, fatigue life, high temperature performance, etc. to verify its reliability and durability in practical applications.

The above is the content that may be covered in the research of 316L stainless steel powder selective laser melting rapid prototyping process. Through systematic research and optimization, the rapid manufacture of high-quality and complex-shaped 316L stainless steel parts can be realized, and its broad application prospects can be explored.