Method for improving wear resistance and impact resistance of laser additive manufacturing alloy steel component

Abstract

The invention belongs to the field of metal laser additive manufacturing, and particularly relates to a method for improving wear resistance and impact resistance of a laser additive manufacturing alloy steel component. The method is suitable for obviously improving the wear resistance and impact resistance of various alloy steel component laser additive materials. First, one, two or more powdersof Mo, TiC, B, Si, V, Cr, Ni and the like which have the same particle size as an alloy steel powder are adopted, are uniformly mixed for a certain proportion in the alloy steel powder through a ballmill, a laser deposition substrate is preheated, then laser deposition is performed in a vacuum glove box by using a synchronous powder feeding method, a laser deposition active area is covered with argon with a certain flow rate in the deposition process, and the substrate is heated and maintained by using induction, so that the compact deposited layer and timely controllable wear resistance andimpact resistance laser additive manufacturing can be realized. According to the method, an efficient and reliable novel technological method for improving the wear resistance and impact resistance ofthe laser additive manufacturing of the alloy steel component is provided, and the method has important significance for manufacturing the alloy steel component and the laser surface modification ofthe alloy steel component.

Description

technical field [0001] The invention belongs to the field of metal laser additive manufacturing, and specifically relates to a method for improving the wear resistance and impact resistance of alloy steel components manufactured by laser additive manufacturing. Background technique [0002] Laser deposition additive manufacturing is a new manufacturing technology that uses high-power lasers as heat sources to achieve additive manufacturing by melting and accumulating layers of raw materials such as powder and wire that are transported synchronously through laser fusion, and realizes metal parts with arbitrary complex shapes. Molding manufacturing. The wear resistance and impact resistance of additively manufactured alloy steel components is generally poor, and it is usually achieved by surface carburizing and nitriding and corresponding heat treatment processes, but the carburizing and nitriding layer is thin, only tens to hundreds of microns, and in harsher environments Un...

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Problems solved by technology

[0005] In order to solve the problem of low wear resistance and impact resistance of alloy steel components manufactured by laser additive manufacturing, the purpose of the present invention is to provide a method for improving the wear resistance and impact resistance of alloy steel components manufactured by laser additive manufacturing, by mixing the same particle size of Mo, One or more powders such as TiC, B, Si, V, Cr, Ni, etc. are deposited by laser. During the deposition process, induction heating is used to heat the insulation substrate to achieve good wear resistance and impact resistance on the surface of laser deposited alloy structural steel components, and Obtain dense and controllable timely wear and impact resistance of alloy steel laser deposition structure, effectively improve the reliability and economy of the additive manufacturing process of steel structural parts, while reducing energy consumption and pollution

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