A 3D printing method for metal samples containing built-in inclusions

Abstract

The invention discloses a 3D printing forming method of a metal sample containing built-in inclusions, which comprises the following steps: modeling the three-dimensional model of the metal sample and obtaining its layer profile data; using a laser cladding forming method with the help of a high-energy laser beam A molten pool is formed on the metal plate; the powder of the metal sample is used as the base material, which is transported into the molten pool through the powder feeding device and the powder nozzle for melting, and the current layer is printed out, and clad layer by layer to the designated position of the inclusion; The inclusions whose shape and composition are known are fixed at the designated position, and continue to be clad and formed layer by layer to the height required by the metal sample. The invention adopts the laser cladding forming technology, and puts the inclusions with known shapes into the metal matrix during cladding. The method of the present invention can not only prepare metal samples of various complex shapes, but also ensure that the specific position and original shape of the inclusions can be accurately located without destroying the continuity of the metal matrix, which improves the research efficiency of the inclusions in the metal. Precision and accuracy.

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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