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Maintenance of welding materials
Release time:
2023-08-11 20:02
Source:
1, welding material warehouse should maintain appropriate temperature and humidity, temperature ≧ 5 ℃, relative humidity ≦ 60%, keep clean and dry indoors, and do not store harmful media. Every day after work, before work temperature and humidity inspection (not less than twice a day) and record. Welding materials shall be stored in a dry warehouse with good ventilation. In order to prevent the welding material from being affected with damp and deterioration, the welding material shall be kept away from the ground and 300mm above the wall. When stacking the original boxes of welding materials, the height of each pile shall not exceed 1.5m and the width shall not exceed 2m. Appropriate space shall be reserved between the piles to facilitate ventilation.
3 3, welding materials storage must be correct, neat, safe and stable, see the number, easy to check, material label complete, obvious identification.
4, according to the brand, batch number, specifications, storage time is different, and there are obvious differences in identification, so as not to mix.
5. The storage time of welding rod and welding wire should not be too long, and the storage time from the date of making products (according to the specific storage conditions of the warehouse) should not exceed 24 months. The welding wires that have been unpacked for inspection shall be rewrapped. The welding rods that have been unpacked and recycled shall be wrapped into bundles with paper and corresponding marks (model, brand, specification, etc.) and recycling records shall be made to avoid confusion and wrong delivery. The paint color, mark and filling coefficient of steel cylinders equipped with welding shielding gas shall conform to the provisions of Safety Supervision Regulations for Gas Cylinders. Carbon dioxide and argon gas cylinders should be dedicated, not filled with other gases.
7. The welding gas cylinder shall be placed vertically in a ventilated and dry place to avoid heat and sunlight exposure. According to different gases, gas composition ratio, purity (such as pure argon and high purity argon), empty bottles and solid bottles are stored separately and clearly marked.
8. Measures shall be taken to fix the gas cylinder for welding protective gas to prevent safety accidents caused by gas cylinder dumping. Gas cylinders used for field welding must also be fixed.
Key words:
Welding materials
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Considerations for Welding Materials (Electrodes, Wires and Submerged Arc Flux)
1. Welding rod (1) Stainless steel welding rod usually has two kinds of titanium calcium type and low hydrogen type. Welding current as far as possible the use of DC power supply, is conducive to overcome the welding rod redness and penetration. The electrode of titanium calcium type drug skin is not suitable for all-position welding, only suitable for flat welding and flat fillet welding. The electrode of low hydrogen type drug skin can be welded in all positions.
Considerations for Welding Materials (Electrodes, Wires and Submerged Arc Flux)
1. Welding rod (1) Stainless steel welding rod usually has two kinds of titanium calcium type and low hydrogen type. Welding current as far as possible the use of DC power supply, is conducive to overcome the welding rod redness and penetration. The electrode of titanium calcium type drug skin is not suitable for all-position welding, only suitable for flat welding and flat fillet welding. The electrode of low hydrogen type drug skin can be welded in all positions.
Maintenance of welding materials
1. The welding material warehouse shall be kept at a suitable temperature and humidity, with a temperature of ≧ 5 ℃ and a relative humidity of ≦ 60%. The room shall be kept clean and dry, and harmful media shall not be stored. Every day after work, before work temperature and humidity inspection (not less than twice a day) and record.
Principles for selection of welding materials
The welding materials shall be selected according to the chemical composition, mechanical properties and welding performance of the base metal and in combination with the structural characteristics, service conditions and welding methods of the pressure vessel, and shall be determined through tests if necessary.
Application of Welding Materials
Electrodes can be divided into two categories: acid electrode and alkaline electrode. The acid electrode commonly used in production is titanium calcium electrode, and the alkaline electrode is low hydrogen electrode mainly composed of carbonate and fluorite. Acid electrode arc is more stable, strong adaptability, AC and DC welding machine can be applied, but the mechanical properties of the weld is general, crack resistance is poor. Alkaline electrode arc ignition is more difficult, arc is not stable, poor adaptability, only suitable for DC arc welding machine, but the mechanical properties and crack resistance of the weld is better, suitable for medium carbon steel, high carbon steel welding.
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