How to select welding rod in a targeted way-list of common points of welding rod
Release time:
2022-03-31
【Summary Description】 Under the structural safety requirements of welding workpieces, there are certain selection points for welding rods, mainly including various components, properties, and welding requirements, structural characteristics, stress conditions, operating environment and economic benefits, etc., to ensure that the above contents are combined under the condition of targeted selection of welding rods, and specific welding performance tests can be carried out when necessary.
Under the structural safety requirements of welded workpieces,Welding rodThere are certain selection points, mainly including various components, performance, and weld requirements, structural characteristics, stress and operating environment and economic benefits, etc., to ensure that the above contents are combined in the case of targeted selection of welding rod, if necessary, can carry out specific welding performance test.
1. Same kind of base materialWelding equipmentKey Points
Taking ordinary structural steel as an example, due to the need to consider the strength of the weld metal and the base metal, it is necessary to select the electrode with the tensile strength of the deposited metal equal to or slightly higher than the base metal. Under the requirements of performance and working conditions, for the weldments that need to bear the load and impact load, in addition to the strength requirements, it is necessary to ensure high impact toughness and plasticity. In addition, other corrosion-resistant materials, high temperature, bottom temperature and other different welding equipment, should choose the corresponding specialSolder bar.
2. Key points of welding equipment for dissimilar base materials
The strength level of carbon steel and low alloy steel is different. The processing strength of weld metal or joint is not less than the minimum strength of two kinds of weld metal. The selection of welding rod should ensure the strength, plasticity and impact toughness of weld and joint. Low alloy steel austenitic stainless steel needs to Cr25-Ni13 austenitic steel electrodes with high nickel content, good plasticity and crack resistance, and avoid cracks. According to the welding requirements of the base layer, the cladding layer and the transition layer, it is necessary to select the solder bar with different properties.
To sum up, a wide variety of electrodes, and have certain characteristics and uses, coupled with physical and chemical properties, workpiece conditions, construction conditions, as well as economic factors, is bound to bring difficulties to the selection of solder, reference to the above selection principles, can help manufacturers to reduce a lot of trouble.
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