This International Standard specifies requirements for classification of rods and wires in the as-welded condition and in the post-weld heat-treated condition for tungsten inert gas 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 International Standard is a combined specification providing classification utilizing a system based upon the yield strength and the average impact energy of 47 J of all-weld metal, or utilizing a system based upon the tensile strength and the average impact energy of 27 J of all-weld metal. 1) Paragraphs and tables which carry the suffix letter “A” are applicable only to rods and wires classified to the system based upon the yield strength and the average impact energy of 47 J of all-weld metal in accordance with this International Standard. 2) Paragraphs and tables which carry the suffix letter “B” are applicable only to rods and wires classified to the system based upon the tensile strength and the average impact energy of 27 J of all-weld metal in accordance with this International Standard. 3) Paragraphs and tables which have neither the suffix letter “A” nor the suffix letter “B” are applicable to all rods and wires classified in accordance with this International Standard.
ISO 636-2004由国际标准化组织 IX-ISO 发布于 2004-05。
ISO 636-2004 在中国标准分类中归属于: J33 焊接与切割,在国际标准分类中归属于: 25.160.20 焊接消耗品。
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答:用纯钨或活化钨(钍钨、铈钨、锆钨、镧钨)作为不熔化电极的惰性气体保护电弧焊,简称TIG焊。15.什么叫SMAW(焊条电弧焊)焊接? 答:用手工操纵焊条进行焊接的电弧焊方法。 16.什么叫碳弧气刨? 答:使用碳棒作为电极,与工件间产生电弧,用压缩空气(压力0.5~0.7MPa)将熔化金属吹除的一种表面加工的方法。常用来焊缝清根、刨坡口、返修缺陷等。 17.为什么CO2焊比焊条电弧焊效率高?...
D、焊前预热,减缓冷却速度。E、用偏强的规范施焊。 B、夹渣 夹渣是指焊后溶渣残存在焊缝中的现象。 (1)、夹渣的分类 A、金属夹渣:指钨、铜等金属颗粒残留在焊缝之中,习惯上称为夹钨、夹铜。B、非金属夹渣:指未熔的焊条药皮或焊剂、硫化物、氧化物、氮化物残留于焊缝之中。冶金反应不完全,脱渣性不好。 ...
不用考虑螺柱长度的焊接收缩量,这是因为溶池很小,而且接头是塑性连接。 接头没有外部可见的焊脚,不需要进行接头外观质量检查,不会有气孔、裂纹等缺陷。 TIG焊在惰性气体的保护下,利用电极与母材金属(工件)之间产生的电弧热熔化母材和填充焊丝的焊接过程。 优点: 惰性气体不与金属发生任何化学反应,也不溶于金属,为获得高质量的焊缝提供了良好条件。 ...
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