钢筋电渣压力焊工艺标准(415-1996)（Technical standard for electroslag welding of steel bars (415-1996)）.docVIP

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钢筋电渣压力焊工艺标准(415-1996)（Technical standard for electroslag welding of steel bars (415-1996)）.doc

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钢筋电渣压力焊工艺标准(415-1996)（Technical standard for electroslag welding of steel bars (415-1996)） Range The process standard is applicable to the connection of steel bars in the vertical or oblique (4 to 1 range) of the diameter from 14 to 40mm in the cast-in-place reinforced concrete structures in industrial and civil buildings. Construction preparation 2.1 materials and main equipment: 2.1.1 reinforcement: the grade and diameter of the reinforcement must comply with the design requirements. There is a factory certificate and a re examination report. There shall also be chemical re examination sheets for the imported steel bars. The chemical composition shall meet the requirements of welding and shall be tested for weldability. 2.1.2 solder. The performance of 2.2.2.1 flux shall comply with the requirements for welding flux of GB5293 carbon steel submerged arc welding. Flux model is HJ401, commonly used for smelting type of high manganese, high silicon, low fluorine flux or medium manganese, high silicon, low fluorine flux. 2.1.2.2 flux shall be stored in a dry warehouse to prevent moisture from being affected. In case of moisture, bake 2H at 250~300 degrees centigrade before use. 2.1.2.3 fluxes recovered from use shall be removed from slag and impurities and shall be used in combination with new flux. 2.1.2.4 flux shall have factory certificate. 2.1.3 main tools: 2.1.3.1 manual electroslag pressure welding equipment includes: welding power supply, control box, welding fixture, solder pot, etc.. 2.1.3.2 automatic electroslag pressure welding equipment (should be preferred), including: welding power supply, control box, operating box, welding head, etc.. 2.1.3.3 welding power supply. For steel electroslag pressure welding, it is better to use AC or DC welding power source with higher secondary load voltage (above TSV). (generally 32mm diameter and below the reinforcement welding, can use the capacity of 600A welding power; 32mm diameter and above the reinforcement welding,