A heterogeneous material laser repair shape-synergy regulation process method

By optimizing the composition and preparation process of nickel-based alloy powder, and combining electromagnetic-assisted online strengthening technology and laser scanning remelting, the problems of thermal stress and microstructure inhomogeneity in laser additive repair were solved, and high-quality repair of ultra-high strength steel components was achieved.

CN117773144BActive Publication Date: 2026-06-02WUHU STATE-OWNED FACTORY OF MACHINING
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
WUHU STATE-OWNED FACTORY OF MACHINING
Filing Date
2023-12-22
Publication Date
2026-06-02

AI Technical Summary

Technical Problem

Existing laser additive repair technology for repairing ultra-high strength steel components suffers from problems such as complex thermal stress, uneven microstructure, and deformation cracking, resulting in poor repair effects and a lack of effective methods for synergistic control of shape and properties.

Method used

A heterogeneous material laser repair synergistic control process is adopted. By optimizing the composition and preparation process of nickel-based alloy powder, combined with electromagnetic-assisted online enhancement technology and laser scanning remelting, the scanning strategy and parameters are optimized to achieve thermal stress control and microstructure uniformity improvement.

Benefits of technology

It effectively reduces residual stress and deformation during the repair process, improves the performance and service life of the repaired parts, and ensures high-quality repair results.

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Abstract

The present application relates to the technical field of laser additive repair, in particular to a heterogeneous material laser repair shape-property synergistic regulation process method, comprising the following steps: (1) nickel-based laser additive repair powder composition optimization design; (2) nickel-based laser additive repair powder preparation; (3) laser repair process parameter and path scanning strategy optimization; (4) electromagnetic auxiliary online enhanced laser repair; (5) laser scanning remelting; (6) performance evaluation of the designed powder prepared by the designed repair process. The present application improves the physicochemical properties and thermodynamic parameters of the repaired layer, solves the control of temperature gradient distribution and expansion and shrinkage behavior in the laser additive repair process, thereby realizing the thermal stress regulation problem, reducing the residual stress and deformation in the repair forming process, controlling the stress accumulation process, reducing the deformation cracking tendency, and providing a reliable guarantee for high-quality repair.
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