Method for eliminating helium bubble defect in nuclear power steel and product
The pulsed current treatment method eliminates helium bubble defects in nuclear power steel, solves the problem of material thermal aging caused by high-temperature annealing, and achieves low-cost and rapid dynamic self-healing effect.
CN121896437APending Publication Date: 2026-04-21UNIV OF SCI & TECH BEIJING
0 Cites 0 Cited by
Patent Information
- Application Number
- CN202610047609.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-01-14
- Publication Date
- 2026-04-21
AI Technical Summary
Technical Problem
Existing technologies are insufficient to effectively eliminate helium bubble defects in nuclear power steel, and high-temperature annealing leads to thermal aging of the material, resulting in high costs and difficulty in in-situ repair.
Method used
By employing a pulsed current processing method, and controlling the current density, frequency, pulse width, and temperature, the helium bubble is eliminated through the current bypass effect, thereby achieving dynamic self-repair.
Benefits of technology
It can rapidly eliminate helium bubbles at low temperatures, avoid thermal aging of materials, restore material hardness, and is suitable for in-situ repair of large nuclear power components.
✦ Generated by Eureka AI based on patent content.
Abstract
The invention relates to a method and a product for eliminating helium bubble defects in nuclear power steel, which comprises the following steps of: treating the nuclear power steel which is damaged by helium ion irradiation to generate helium bubble gathering and surface hardening by pulse current, eliminating the helium bubble defects, recovering the surface hardness of the nuclear power steel, and realizing dynamic self-repairing of irradiation damaged tissues of the nuclear power steel. The method is suitable for pulse current elimination of irradiation helium bubble defects of nuclear power steel such as austenitic stainless steel and austenite-ferrite duplex stainless steel, and is also suitable for pulse current elimination of irradiation helium bubble defects of any metal material. Experiments prove that helium bubbles induced by irradiation cause serious hardening of the surface of the material, and after the helium bubbles are eliminated through pulse current treatment, nanoindentation tests show that the hardness of the material is remarkably reduced and basically returns to the original level before irradiation. The method has the advantages of short treatment time and low energy consumption, and can effectively prolong the service life of key components such as nuclear-grade main pipelines.
Need to check novelty before this filing date? Find Prior Art