Technological parameter determining method of metal material 3D printing

Abstract

The invention discloses a technological parameter determining method of metal material 3D printing. The method comprises the steps that range values of the powder layer thickness, laser power and scanning speed parameters are determined; multiple point values are arranged within all parameter ranges in an arithmetic value progression mode; all the point values are in one-to-one correspondence to form multiple I type parameter groups, and metal sample blocks are printed for all the I type parameter groups; the obtained sample blocks are subjected to a hardness test, a I type parameter group value with the highest hardness is selected, upper and lower point values of laser power point values and scanning speed point values in the I type parameter group are determined, and the obtained point values are in one-to-one correspondence to form nine II type parameter groups; tensile test bars are printed for all the II type parameter groups; the obtained tensile test bars are subjected to a tensile test, a II type parameter group value with the best mechanical property is obtained, and then the technical parameter suitable for metal material 3D printing is obtained. Accordingly, by means of a regular parameter combination mode, the parameter range is narrowed through the hardness test, the most suitable parameter is obtained through the tensile test, and the method is simple, reliable, economical and practical.

Description

technical field [0001] The invention relates to the technical field of 3D printing, in particular to a method for determining process parameters of 3D printing of metal materials. Background technique [0002] Industrial-grade 3D printing technology uses metal powder as raw material, and the produced metal parts need to meet the performance requirements before they can be delivered. There are certain differences between 3D printers of different models and manufacturers, and there are also deviations in the output parameters. Even for the same 3D printing equipment, the parameters adopted between different metal materials are different. At present, the process parameters for metal materials are limited to several commonly used alloys (GH4169, GH3536, 316L, etc.), which cannot meet the differentiated needs of the market. At the same time, in the process of 3D printing, there are still many variables, such as laser power, laser scanning speed, powder layer thickness, etc. The...

AI Technical Summary

Problems solved by technology

At present, the process parameters for metal materials are limited to several commonly used alloys (GH4169, GH3536, 316L, etc.), which cannot meet the differentiated needs of the market

At the same time, in the process of 3D printing, there are still many variables, such as laser power, laser scanning speed, powder layer thickness, etc. These parameter variables will greatly affect the final performance of the printed parts. Blindly exploring the process parameters will lead to Waste a lot of human, material and financial resources

[0003] It can be seen that there is still no effective method for determining the process parameters of 3D printing of metal materials in this field, and innovation is urgently needed

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