钢筋手工电弧焊技术交底.doc

交底内容：
钢筋手工电弧焊
本技术交底适用于工业与民用建筑的钢筋及埋件手工电弧焊。
1．材料要求
（1）钢筋：钢筋的级别、直径必须符合设计要求，有出厂证明书及复试报告单。进口钢筋还应有化学复试单，其化学成分应满足焊接要求，并应有可焊性试验。预埋件的锚爪应用I、Ⅱ级钢筋。钢筋应无老锈和油污。
（2）钢材：预埋件的钢材不得有裂缝、锈蚀、斑痕、变形，其断面尺寸和机械性能应符合设计要求。
（3）焊条：焊条的牌号应符合设计规定。如设计无规定时，应符合表2－49的要求。焊条质量应符合以下要求。
1）药皮应无裂缝、气孔、凹凸不平等缺陷，并不得有肉眼看得出的偏心度。
2）焊接过程中，电弧应燃烧稳定，药皮熔化均匀，无成块脱落现象。
3）焊条必须根据焊条说明书的要求烘干后才能使用。
4）焊条必须有出厂合格证。
2．主要机具
弧焊机、焊接电缆、电焊钳、面罩、堑子、钢丝刷、锉刀、榔头、钢字码等。
钢筋电弧焊使用的焊条牌号　
Cards on the table contents:
Steel manual metal arc welding
The technical disclosure for industrial and civil buildings of steel and embedded parts of manual arc welding.
1. Material requirements
(1) steel: steel grade, diameter and must meet the design requirements, with a factory certificate and re-testing report card. Imports of steel should have the chemical re-testing one of its chemical composition should meet the welding requirements, and should solderability test. Application of embedded parts fluke I, Ⅱ grade steel. There should be no old rust steel and oil.
(2) steel: steel embedded parts shall not have cracks, corrosion, scarring, deformation, the section size and the mechanical properties should be consistent with design requirements.
(3) electrode: electrode grade shall meet the design requirements. No provisions such as the design should be consistent with the requirements of Table 2-49. Welding quality should meet the following requirements.
1) Drug skin should be no cracks, holes, uneven surfaces and other defects, and not with the naked eye can see that the eccentricity.
2) welding process, the arc should be stable combustion, melting skin even medicine, without the piece off phenomenon.
3) welding electrode specification requirements must be dried before use.
4) The electrode must have factory certification.
2. Major equipment
Arc welding machine, welding cable, electrode holder, mask, cutting child, wire brush, rasp, hammer, steel character codes.
Electric arc welding electrodes used in steel grades