Low-alloy steel welding rod capable of achieving postweld heat treatment

A post-weld heat treatment, low-alloy steel technology, applied in welding media, welding equipment, metal processing equipment, etc., can solve the problems of poor arc stabilization effect and poor heat treatment performance, and achieve stable arc, stable mechanical properties, and production adaptability. good effect

Active Publication Date: 2017-08-25
725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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AI Technical Summary

Problems solved by technology

[0012] The purpose of the present invention is to solve the problems of poor post-weld heat treatment performance and poor arc stabilization effect of existing electrodes, and provide a post-weld heat-treatable low-alloy steel electrode. 2 E5515-E electrode has good all-position welding processability, uniform and stable weld seam mechanical properties, stable and excellent toughness of deposited metal at low temperature (-50°C), and good performance of deposited metal after post-weld heat treatment

Method used

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Embodiment Construction

[0040] The specific implementation is as follows:

[0041] According to the design component content of the present invention, three kinds of powders were prepared, and the experimental electrode was prepared according to the preparation process of the present invention. The specific proportions are shown in Table 1. It should be noted that the present invention is not limited to these examples.

[0042] Table 1 Example composition ratio (number of parts)

[0043] serial number Example 1 Example 2 Example 3 marble 43 47 50 fluorite 19 22 23 rutile 0.5 1 0.8 quartz 3.5 5 7 soda ash 0.5 0.5 0.5 CMC 0.5 0.5 0.5 graphite 0.3 0.3 0.3 Atomized ferrosilicon 4 4 6 manganese metal 4.5 4 3 alloy 5 7 12 water glass 20 22 24

[0044]The welding rod made of the above components is tested. Before the welding test, the welding rod is baked at 350~380°C for 1.5 hours, and then the depos...

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PUM

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Abstract

The invention provides a low-alloy steel welding rod capable of achieving postweld heat treatment. An H08E carbon steel welding core is used as a welding core. A flux cover comprises, by weight, 42-55 parts of marble, 18-24 parts of fluorite, 0,5-2 parts of rutile, 3-9 parts of quartz, 0.3-0.8 part of sodium carbonate, 0.3-0.8 part of CMC, 0.2-0.5 part of graphite, 3-9 parts of silicon iron, 3-9 parts of manganese, 9-18 parts of alloy, and 20-25 parts of water glass. Alloy powder comprises, by weight, 25-35 parts of nickel powder, 5-15 parts of ferromolybdenum, 5-15 parts of ferrotitanium and 90-110 parts of iron powder. Potassium-sodium water glass with the modulus M being 3.4 and the potassium-sodium ratio being 1/2-3/4 is adopted to serve as the water glass. According to the low-alloy steel welding rod capable of achieving postweld heat treatment, the manufacturability is good; and under the wide technological specification, electric arcs are stable, deslagging is easy, and weld beads are formed uniformly and are attractive.

Description

technical field [0001] The invention relates to the technical field of welding materials, in particular to a post-weld heat-treatable low-alloy steel electrode. Background technique [0002] With the development of our country's economy, some high-end container manufacturing and application markets are rising day by day, and the related base metal materials have basically realized localization. However, due to the relative lag in welding metallurgy, some welding materials for high-end container manufacturing still rely on imports. There are phenomena such as high price, long delivery cycle, and difficult quality control. Therefore, the localization of high-end special welding materials is an important task for current welding materials welding. It has been listed in "Made in China 2025" by China Machinery Association-Welding Branch Welding technology development route. [0003] Welding materials for high-end container manufacturing are getting more and more attention. In re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/362B23K35/40
CPCB23K35/362B23K35/40
Inventor 宋聚海韩龙昊聂建航朱官朋
Owner 725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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