Three-dimensional printing method of metal sample containing built-in inclusion

Abstract

The invention discloses a three-dimensional printing method of a metal sample containing a built-in inclusion. The method comprises the following steps that a three-dimensional model of the metal sample is built, and layer contour data of the model is obtained; by means of a laser cladding forming method, a molten bath is formed on a metal plate through a high-energy laser beam; powder of the metal sample serves as a base material, the powder is conveyed into the molten bath to be molten through a powder feeding device and a powder nozzle, a current layer is printed, and cladding is conducted layer by layer to reach the specified location where the inclusion is located; the inclusion with known morphology and composition is fixed at the specified location, and layer-by-layer cladding forming is conducted continuously till the metal sample reaches the required height. According to the three-dimensional printing method of the metal sample containing the built-in inclusion, the laser cladding forming technology is adopted, and the inclusion with the known morphology and composition is put into a metal substrate during cladding; on one hand, metal samples with various complex shapes can be prepared; on the other hand, it is guaranteed that on the premise that the continuity of the metal substrate is not destroyed, the specific location and original morphology of the inclusion are positioned accurately, and the precision and accuracy of research on the inclusions in metal are improved.

Description

technical field [0001] The invention relates to the field of rapid prototyping of powder materials, in particular to a method for 3D printing and forming of metal samples containing built-in inclusions, which is applied to the field of material forming. Background technique [0002] With the rapid development of science and technology, my country's steelmaking technology has also made great progress, but the inclusions in the steel are still difficult to eliminate, and the inclusions have a great impact on the performance and quality of forgings, which often make forgings due to flaw detection. Therefore, it is of great significance to study the deformation behavior of inclusions in the forging process of steel ingots. To study inclusions in steel requires a forming method that produces metal samples with built-in inclusions. [0003] For the preparation of metal samples containing built-in inclusions, scholars at home and abroad generally use two methods: one is to prepare ...

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of inclusions in metal samples for experimental research, and propose a 3D printing forming method for metal samples containing built-in inclusions, which overcomes the defect that only regular-shaped samples can be prepared in the prior art At the same time, it also ensures that the continuity of the metal matrix is ​​not destroyed, the specific position and original shape of the inclusion can be accurately located, and the metallurgical combination of the metal matrix and the inclusion is guaranteed, which greatly improves the accuracy of the experimental study of the inclusion in the metal sample. with accuracy

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