Welding standard

1, welding quality GB64 16- 1986 technical factors affecting the quality of steel fusion welded joints.

2. Welding quality GB64 17- 1986 Classification and description of weld defects in metal fusion welding

3. TJ12.1-1981Construction Machinery Welding Quality Regulations

4. Welding quality JB/ZQ3679 Welding quality

5, welding quality JB/ZQ3680 weld appearance quality

6, welding quality CB999- 1982 hull weld surface quality inspection method

7. Welding Quality JB3223- 1983 covered electrode Quality Management Regulations

8. Requirements and defect classification of fusion welded joints of welding quality assurance steel GB/T 12469- 1990 abolished in 2005.

Extended data:

The sequence to be considered when selecting welding wires is as follows:

① Selection of welding wire For carbon steel and low-alloy high-strength steel, according to the steel type of welding structure, welding wires meeting the requirements of mechanical properties are mainly selected according to the principle of "equal strength matching". For heat-resistant steel and weather-resistant steel, the consistency and similarity of chemical composition between weld metal and base metal are mainly considered to meet the requirements of heat resistance and corrosion resistance.

(2) According to the quality requirements of weldments (especially impact toughness), the choice of welding wire is related to welding conditions, groove shape, shielding gas mixing ratio and other technological conditions. On the premise of ensuring the performance of welded joints, the welding materials that can achieve the maximum welding efficiency and reduce the welding cost should be selected.

(3) Select the welding wire diameter according to the thickness of the workpiece to be welded at the welding site, determine the current value used, and refer to the product introduction materials and experience of various manufacturers to select the welding wire brand suitable for welding position and current.

References:

Baidu encyclopedia-welding