EN ISO 2560:2020由欧洲标准化委员会 IX-CEN 发布于 2020-09-16,并于 2020-12-31 实施,于 2021-03-31 废止。
EN ISO 2560:2020在国际标准分类中归属于: 25.160.20 焊接消耗品。
This document specifies requirements for the classification of covered electrodes and deposited metal in the as-welded condition and in the post-weld heat-treated condition for manual metal arc welding of non-alloy and fine grain steels with a minimum yield strength of up to 500 MPa or a minimum tensile strength of up to 570 MPa. This document is a combined specification providing for classification utilizing a system based on the yield strength and the average impact energy of 47 J of all-weld metal, or utilizing a system based on the tensile strength and the average impact energy of 27 J of all-weld metal. a) Clauses, subclauses and tables which carry the suffix letter "A" are applicable only to covered electrodes classified to the system based on the yield strength and the average impact energy of 47 J of all weld metal in this document. b) Clauses, subclauses and tables which carry the suffix letter "B" are applicable only to covered electrodes classified to the system based on the tensile strength and the average impact energy of 27 J of all weld metal in this document. c) Clauses, subclauses and tables which do not have either the suffix letter "A" or the suffix letter "B" are applicable to all covered electrodes classified in this document.
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结晶裂纹最常见的情况是沿焊缝中心长度方向开裂,为纵向裂纹,有时也发生在焊缝内部两个柱状晶之间,为横向裂纹。弧坑裂纹是另一种形态的,常见的热裂纹。 热裂纹都是沿晶界开裂,通常发生在杂质较多的碳钢、低合金钢、奥氏体不锈钢等材料气焊缝中 (2)影响结晶裂纹的因素 A、合金元素和杂质的影响碳元素以及硫、磷等杂质元素的增加,会扩大敏感温度区,使结晶裂纹的产生机会增多。 ...
表1 铝合金常用焊接方法的特点及适用范围焊接方法特点适用范围气焊热功率低,焊件变形大,生产率低,易产生夹渣、裂纹等缺陷用于非重要场合的薄板对接焊及补焊等手工电弧焊接头质量差用于铸铝件补焊及一般修理钨极氩弧焊焊缝金属致密,接头强度高、塑性好,可获得优质接头应用广泛,可焊接板厚1~20㎜钨极脉冲氩弧焊焊接过程稳定,热输入精确可调,焊件变形量小,接头质量高用于薄板、全位置焊接、装配焊接及对热敏感性强的锻铝...
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