美利体育登录入口官网:UNE-EN ISO 5817:2014
焊接 钢、镍、钛及其合金的熔焊接头（不包括束焊） 缺陷质量等级（ISO 5817:2014）
Welding - Fusion-welded joints in steel, nickel, titanium and their alloys (beam welding excluded) - Quality levels for imperfections (ISO 5817:2014)
- 标准号
- UNE-EN ISO 5817:2014
- 发布
- 2014年
- 总页数
- 36页
- 发布单位
- 西班牙标准化协会
- 替代标准
- UNE-EN ISO 5817:2023
- 当前最新
- UNE-EN ISO 5817:2023
- 引用标准
- ISO 4063 ISO 6520-1:2007
- 本体
- 适用性
- 适用范围
- This International Standard provides quality levels of imperfections in fusion-welded joints (except for beam welding) in all types of steel, nickel, titanium and their alloys. It applies to material thickness >= 0,5 mm. It covers fully penetrated butt welds and all fillet welds. Its principles can also be applied to partial-penetration butt welds. Three quality levels are given in order to permit application to a wide range of welded fabrication. They are designated by symbols B, C and D. Quality level B corresponds to the highest requirement on the finished weld. Several types of loads are considered, e.g. static load, thermal load, corrosion load, pressure load. The quality levels refer to production and good workmanship. This International Standard is applicable to a) non-alloy and alloy steels, b) nickel and nickel alloys, c) titanium and titanium alloys, d) manual, mechanized and automatic welding, e) all welding positions, f) all types of welds, e.g. butt welds, fillet welds and branch connections, and g) the following welding processes and their sub-processes, as defined in ISO 4063: - 11 metal-arc welding without gas protection; - 12 submerged-arc welding; - 13 gas-shielded metal-arc welding; - 14 gas-shielded arc welding with non-consumable tungsten electrodes; - 15 plasma arc welding; - 31 oxy-fuel gas welding (for steel only). Metallurgical aspects, e.g. grain size, hardness, are not covered by this International Standard.
| 术语 | 描述 |
|---|---|
| 质量等级 quality level | description of the quality of a weld on the basis of type, size and amount of selected imperfections |
| 适用性 fitness-for-purpose | ability of a product, process or service to serve a defined purpose under specific conditions |
| 短缺陷 short imperfections | 缺陷总长度在100mm焊缝范围内不超过25mm（对于长度≥100mm的焊缝） |
| 系统性缺陷 systematic imperfections | 在焊缝长度范围内重复分布的缺陷，单个缺陷尺寸在规定限值内 |
| 投影面积 projected area | 沿焊缝体积分布的缺陷被二维成像的区域 |
| 横截面积 cross-sectional area | 断裂或切片后需要考虑的区域 |
| 平滑焊缝过渡 smooth weld transition | 焊缝金属与母材过渡处表面平滑，无不规则或尖锐处 |
| 疲劳等级 fatigue class | 疲劳S-N曲线的分类参考，其中x为2×10^6次循环下的应力范围（MPa） |
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