Laser additive manufacturing technology for K465 nickel-base high-temperature alloy structure piece

Abstract

The invention discloses a laser additive manufacturing technology for a K465 nickel-base high-temperature alloy structure piece, and belongs to the technical field of high-temperature alloy laser additive manufacturing. According to the technology forming technology parameters, the laser power ranges from 1,300 W to 1,600 W, the scanning speed ranges from 3 mm / s to 6 mm / s, the powder feeding rate ranges from 1 g / min to 2 g / min, the scanning manner is linear scanning or staggered scanning, and the overlap rate ranges from 40% to 50%. In the forming process, crack forming and expanding are controlled through a laminated structure, and the laminated structure is a structure piece formed through alternated arrangement of a layer of K465 high-temperature alloy and two layers of Stellite 6 high-temperature alloys. According to the technology, crack-free forming manufacturing of the K465 alloy structure piece is achieved.

Description

Technical field [0001] The invention relates to the technical field of laser additive manufacturing of high-temperature alloy structural parts, in particular to a laser additive manufacturing process of K465 nickel-based high-temperature alloy structural parts. Background technique [0002] High-temperature alloys are widely used in aerospace, gas turbines and other fields. K465 alloy is a precipitation-strengthened and solid-solution-strengthened cast nickel-based superalloy. This alloy has high thermal strength, high temperature oxidation resistance, and is suitable for Manufacturing turbine blades for aircraft engines. Due to the variety and high content of alloying elements in the alloy, the forming performance of the alloy is poor. At present, such alloy components are mainly formed by casting process. For structural parts with very complex structures, the casting cannot be demoulded and cannot be formed at one time, which presents major manufacturing difficulties. [0003] ...

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Problems solved by technology

[0004] In order to overcome the problem that the large and complex structural parts of K465 nickel-based superalloy are difficult to prepare in the prior art, the object of the present invention is to provide a laser additive manufacturing process for structural parts of K465 nickel-based superalloy, which realizes the K465 alloy structural parts crack-free forming

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