Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Zirconium-based material surface in-situ ceramization composite treatment method

A composite treatment and ceramization technology, applied in metal material coating process, coating, solid-state diffusion coating, etc., can solve the problem that the quality of ceramization cannot be guaranteed, the surface functional properties that do not fully resist environmental effects, and the hidden danger of pitting corrosion, etc. It can eliminate uncontrollable external pollution factors, eliminate hidden dangers of stress corrosion cracking, and improve corrosion resistance and wear resistance.

Pending Publication Date: 2021-05-28
XIAN UNITED PRESSURE VESSEL CO LTD
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the direct shot-peening nano-treatment on the surface of zirconium alloy is limited by the characteristics of the metal substrate itself. When the surface composition of the material does not change, the nano-layer formed on the surface does not have the ability to completely resist environmental effects and some Special surface functional properties, and lack of engineering service verification guidance and valuable quantitative optimization process data lead to relatively large roughness and local micro-area damage on the zirconium alloy surface, which easily induces stress concentration, stress corrosion cracking and pitting corrosion hidden dangers; At the same time, the nano-layer does not significantly improve the surface hardness of the rare metal zirconium alloy, which cannot meet the long-term use requirements
Since the welds on the inner and outer surfaces of zirconium alloy equipment are distributed in different positions, the surface conditions of each position are very different. When directly performing high-temperature ceramic treatment on the surface of zirconium alloy, it is necessary to perform mechanical grinding and polishing on the inner and outer surfaces of the equipment, which is easy to introduce impurities. Elements are difficult to operate in engineering, and the workload is large and the labor intensity is high. The key is that the color uniformity, compactness, bonding strength, abrasion resistance and fatigue resistance of the surface ceramic film layer are too different and unstable. , it is difficult to promote in engineering applications, and the quality of ceramicization cannot be guaranteed. If the surface pretreatment is carried out, the pickling process will be increased, causing environmental pollution. At the same time, waste acid treatment is also a big problem, resulting in an increase in cost. Or ban the pickling process
[0005] So far, there is no report on the research or engineering application of zirconium-based materials to improve the comprehensive performance of ceramic layers through the surface nanometerization-high temperature ceramicization composite process

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Zirconium-based material surface in-situ ceramization composite treatment method
  • Zirconium-based material surface in-situ ceramization composite treatment method
  • Zirconium-based material surface in-situ ceramization composite treatment method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] This embodiment includes the following steps:

[0041] Step 1. Fe pollution detection in the surface nano-treatment environment: put the filter paper glass patch dipped in the detection reagent in the surface nano-treatment environment for 10 hours for Fe pollution detection. The number of measurement points is 20. When dipped in the detection reagent If the filter paper does not change color and the test result is qualified, the Fe pollution in the surface nano-treatment environment is ruled out. When the filter paper dipped in the detection reagent turns orange and the test result is unqualified, the surface nano-treatment environment should be further cleaned until the test result Qualified; the detection reagent is composed of sodium acetate trihydrate, glacial acetic acid, ammonium hydrochloride, o-phenanthroline and distilled water, wherein the concentration of sodium acetate trihydrate is 0.15g / mL, and the concentration of glacial acetic acid is 0.15g / mL, The con...

Embodiment 2

[0055] This embodiment includes the following steps:

[0056] Step 1. Fe pollution detection in the surface nano-treatment environment: put the filter paper glass patch dipped in the detection reagent in the surface nano-treatment environment for 8 hours to detect Fe pollution. The number of measurement points is 30. When dipped in the detection reagent If the filter paper does not change color and the test result is qualified, the Fe pollution in the surface nano-treatment environment is ruled out. When the filter paper dipped in the detection reagent turns yellow, blue-green or reddish-brown, the test result is unqualified, and the surface nano-treatment should be further cleaned. environment, until the test result is qualified; the detection reagent is composed of hydrated sodium phenanthroline disulfonate, hydrochloric acid and distilled water, wherein the concentration of hydrated hydrated sodium phenanthroline disulfonate is 2.5×10 -4 mol / L, the concentration of hydrochl...

Embodiment 3

[0069] This embodiment includes the following steps:

[0070] Step 1. Fe pollution detection in the surface nano-treatment environment: put the filter paper glass patch dipped in the detection reagent in the surface nano-treatment environment for 12 hours for Fe pollution detection. The number of measurement points is 35. When dipped in the detection reagent If the filter paper of the reagent does not change color and the test result is qualified, then the Fe pollution in the surface nano-treatment environment is ruled out. Treat the environment until the test result is qualified; the detection reagent is composed of hydrated sodium phenanthroline disulfonate, hydrochloric acid and distilled water, wherein the concentration of hydrated hydrated sodium phenanthroline disulfonate is 2.5×10 -4 mol / L, the concentration of hydrochloric acid is 0.1×10 -4 mol / L;

[0071] Step 2. Surface pretreatment of zirconium-based materials: After the Zr alloy surface is degreased and degreased...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
diameteraaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention discloses a zirconium-based material surface in-situ ceramization composite treatment method. The method comprises the following steps: 1, detecting Fe pollution in a surface nanocrystallization treatment environment; 2, pretreating the surface of a zirconium-based material; 3, carrying out surface nanocrystallization treatment on the zirconium-based material; 4, detecting Fe pollution of the zirconium-based material subjected to nanocrystallization treatment; 5, detecting Fe pollution in a heating equipment environment; and 6, performing high-temperature ceramic treatment. The smooth and uniform zirconium-based material processing surface is obtained through nanocrystallization treatment, the stress distribution state of the surface of the zirconium-based material is improved, grain refinement of the surface of the zirconium-based material is promoted, then a complete and compact in-situ ceramic composite treatment layer is formed in combination with high-temperature ceramic treatment, the corrosion resistance and the wear resistance of the surface of the zirconium-based material are improved, the comprehensive service performance of the metal material is greatly improved, and structural function integration of the metal material is effectively achieved.

Description

technical field [0001] The invention belongs to the technical field of surface modification of metal materials, and in particular relates to an in-situ ceramic composite treatment method for the surface of zirconium-based materials. Background technique [0002] Zirconium alloys have the advantages of small thermal neutron absorption cross-section, good radiation stability, and good corrosion resistance in high-temperature water. They are widely used as fuel cladding materials and core structural materials, and are key materials for water-cooled reactor nuclear power plants. During service, the zirconium alloy reacts with high-temperature and high-pressure water, resulting in the formation of an uneven boil-like corroded, white, loose and easy-to-fall oxide film on the surface of the fuel element cladding, resulting in premature damage to the fuel element and seriously affecting its service life. The development of new zirconium alloys also requires a long test and verificat...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C23C8/02C22F1/18C23C8/10
CPCC23C8/02C22F1/186C23C8/10
Inventor 李宁叶建林郗大来
Owner XIAN UNITED PRESSURE VESSEL CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com