一种焊缝质量和均匀性的评价方法

By performing heat oxidation treatment on the weld and testing the oxidation depth and hardness, the problem of difficulty in assessing weld uniformity in existing technologies has been solved, enabling quantitative evaluation of weld quality and uniformity. This method is applicable to weld quality analysis for various welding methods and materials.

CN117491410BActive Publication Date: 2026-07-17BAOSHAN IRON & STEEL CO LTD

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
BAOSHAN IRON & STEEL CO LTD
Filing Date
2022-07-25
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Existing weld quality evaluation methods mainly rely on qualitative analysis, which makes it difficult to effectively detect weld uniformity and defects such as porosity and stress concentration. Moreover, conventional methods are mostly non-destructive or destructive testing, which cannot comprehensively assess the weld uniformity and potential defects.

Method used

By heating and oxidizing the weld, combined with oxidation depth and hardness testing, stress concentration is released, crack-like defects are characterized, and weld uniformity is judged by the difference in oxidation depth and weld hardness changes, thus achieving the evaluation of weld composition uniformity.

Benefits of technology

This paper presents a simple and quantitative method for evaluating weld quality, which can more easily detect defects such as delayed cracks, improve the accuracy and comprehensiveness of weld uniformity assessment, and is applicable to weld quality analysis of various welding methods and materials.

✦ Generated by Eureka AI based on patent content.

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Abstract

一种焊缝质量和均匀性评价方法。其主要是使焊缝发生氧化反应,通过观察焊缝表观差异(包括裂纹、气孔等缺陷)和检测焊缝不同氧化深度和硬度来表征焊缝均匀性指标。包括:对焊缝进行外观观察,并记录焊缝截面特征;将焊缝制样放入具有氧化气氛的加热炉加热至950~1200度,保温10~100min;加热后根据不同焊缝特性进行缓冷、空冷及水淬等处理;处理后试样按不同深度的方式研磨,得到焊缝氧化深度的分布情况。本发明的方法实验简单,适用广泛,可用以分析各种焊接方式的碳钢与碳钢、碳钢与不锈钢及不锈钢与不锈钢焊缝的质量情况。对焊缝疏松、气孔、裂纹等焊接缺陷有较高的辨识度,可表征焊缝化学成分分布的差异,评价焊接工艺的优劣。
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