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High tenacity coating material for low-alloy steel covered arc-welding electrode

A low-alloy steel and high-toughness technology, applied in the field of coatings for high-toughness low-alloy steel electrodes, can solve problems such as the limitations of electrode applications

Active Publication Date: 2007-12-26
上海焊接器材有限公司
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0003] The problem to be solved by the present invention is that the application of welding rods for large steel parts and pressure vessels is limited, and a coating for high toughness low alloy steel welding rods is provided

Method used

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Embodiment Construction

[0008] The present invention is achieved in this way: a kind of coating for high-toughness low-alloy steel electrode, the basic composition of this coating for electrode is: CaO: 58-60%; CaF 2 : 25-27%; SiO 2 : 5-8%; TiO 2 : 3-5%; Al 2 o 3 +Na 2 O+K 2 O: 3-5%, the percentages are weight percentages; the powders of the above-mentioned components are uniformly mixed to prepare the coating for the low-alloy steel welding rod.

[0009] When above-mentioned coating composition is applied to low-alloy steel welding rod, its coating composition is (weight ratio) CaO: 59.2%; CaF 2 : 26.3%; SiO 2 : 6.58%; TiO 2 : 3.96%; Al 2 o 3 +Na 2 O+K 2 O: 3.96%; Stir the drug powder of the above components for 20 minutes to mix evenly, then add water glass with 20% of the total weight of the drug powder as a binder, and press-coat it on the low-carbon steel welding core after stirring for 10 minutes to make a high Ductile low alloy steel electrodes.

[0010] Electrode of the present i...

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Abstract

The invention relates to the field of structural steel welding material, especially relating to a high-flexibility, low-alloy welding rod coating whose basic composition includes: CaO:58-60wt%; CaF2:25-27wt%; SiO2:5-8wt%; TiO2:3-5wt%; Al2O3+Na2O+K2O: 3-5wt%; uniformly mixing their powders and making it; adding water glass to the above powders and blending uniformly and then press-coating the mixture on the welding rods made of low-carbon steel core wire, and the metals coated with it have considerably excellent mechanical property and low-temperature shock flexibility.

Description

technical field [0001] The invention relates to the field of structural steel welding materials, in particular to a coating for high-toughness low-alloy steel welding rods. Background technique [0002] In the construction of large steel bridges, ships, pressure vessels and marine engineering, there are many places that need to be welded. These places are all low-alloy structural steels, which always require extremely high welding strength; Welding of pipes also requires that the weld has reasonably good high temperature performance. For a long time, we have used expensive imported electrodes. Recently, there are some electrodes that can be used in these occasions in China. However, whether it is imported electrodes or domestic electrodes, there are some problems, such as low strength at high temperature or brittleness at low temperature. Large, the application is limited. Contents of the invention [0003] The problem to be solved by the present invention is that the ex...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/365
Inventor 区天仁张述伦王桂芝刘春生
Owner 上海焊接器材有限公司
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