ISO 21952:2007由国际标准化组织 IX-ISO 发布于 2007-11。
ISO 21952:2007 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。
ISO 21952:2007 焊接消耗品.抗蠕变钢的气体保护电弧焊用丝状电极、焊丝、焊条和沉渍物. 分类的最新版本是哪一版?
最新版本是 ISO 21952:2012 。
This International Standard specifies requirements for classification of wire electrodes, wires and rods for gas-shielded metal arc welding and tungsten inert-gas welding of creep-resisting steels, and for their deposits in the as-welded or post-weld heat-treated condition. One wire electrode can be tested and classified with different shielding gases. This International Standard is a combined specification providing for classification utilizing a system based upon the chemical composition of wire electrodes, wires and rods with requirements for yield strength and average impact energy of 47 J of all-weld metal, or utilizing a system based upon the tensile strength of the all-weld metal deposits and the chemical composition of wire electrodes, wires and rods. 1) Clauses, subclauses and tables which carry the suffix letter “A” are applicable only to wire electrodes, wires, rods and deposits classified in accordance with the system based upon the chemical composition with requirements for yield strength and the average impact energy of 47 J of all-weld metal deposits under this International Standard. 2) Clauses, subclauses and tables which carry the suffix letter “B” are applicable only to wire electrodes, wires, rods and deposits classified in accordance with the system based upon the tensile strength of all-weld metal deposits and the chemical composition of wire electrodes, wires and rods under this International Standard. 3) Clauses, subclauses and tables which do not have either the suffix letter “A” or the suffix letter “B” are applicable to all wire electrodes, wires, rods and deposits classified under this International Standard.
焊丝力学1、检测用于气体保护电弧焊用碳钢;2、低合金钢实心焊丝和填充丝的抗拉强度;3、屈服强度;4、伸长率等指标。...
二、氩弧焊接氩弧焊接是电弧焊的一种,主要是利用连续送进的焊丝与工件之间燃烧的电弧作热源,由焊炬喷嘴喷出的气体保护电弧来进行焊接的。目前氩弧焊接是常用的方法,可适用于大部分主要金属,包括碳钢、合金钢。熔化极惰性气体保护焊适用于不锈钢、铝、镁、铜、钛、锆及镍合金,由于价格低,被广泛用于模具修复焊,但焊接热影响面积大、焊点大等缺点,目前在精密模具修补方面已逐步补激光焊所代替。...
当用气体保护焊,保护气体中含氧量超过1%时,每道次焊后建议必须对焊缝表面进行适量打磨,表系三种焊接工艺的主要焊接参数,供参考。 手工电弧焊的焊接参数 电焊条直径/mm电压/V焊接电流/A?2.422~2455~75?2.422~2480~100?3.222~25115~150?...
焊条、焊剂烘干不够。 2. 焊接工艺不够稳定,电弧电压偏高,电弧过长,焊速过快和电流过小。 3. 填充金属和母材表面油、锈等未清除干净。 4. 未采用后退法熔化引弧点。 5. 预热温度过低。 6. 未将引弧和熄弧的位置错开。 7. 焊接区保护不良,熔池面积过大。 8. 交流电源易出现气孔,直流反接的气孔倾向最小。...
Copyright ©2007-2022 ANTPEDIA, All Rights Reserved
京ICP备07018254号 京公网安备1101085018 电信与信息服务业务经营许可证:京ICP证110310号