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A kind of manufacturing method of special welding rod for corrosion-resistant steel welding

A production method and technology of corrosion-resistant steel, applied in welding media, welding equipment, welding/cutting media/materials, etc., can solve the problems of insufficient impact toughness, poor corrosion resistance of hydrogen sulfide, etc. Good resistance to hydrogen sulfide corrosion

Active Publication Date: 2018-06-01
浙江申嘉焊材科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Electrode is an important welding material for steel plate welding. In the process of matching corrosion-resistant steel welding, it is required that the weld metal not only has the characteristics of high strength and high toughness, but also has good resistance to hydrogen sulfide corrosion and seawater corrosion. , and the current matching electrodes have defects such as poor hydrogen sulfide corrosion resistance and insufficient impact toughness.

Method used

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Experimental program
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Embodiment Construction

[0024] The present invention will be further described below in conjunction with the embodiments.

[0025] The invention discloses a method for manufacturing a special electrode for welding corrosion-resistant steel, comprising the steps of: 1) preparation of a binder; 2) pretreatment of a coating; 3) preparation of an electrode.

[0026] In the preparation step of the binder, specifically, the attapulgite powder is added to hydrochloric acid with a mass concentration of 1% to 20% at a mass volume ratio of 1:50, soaked in hydrochloric acid, mechanically stirred for 2h to 8h, centrifuged and cleaned to obtain Modified attapulgite: mixing the prepared modified attapulgite with sodium carboxymethyl cellulose, water glass, and sodium stearate in proportion, the mixing temperature is 20-40°C, and the mixing time is 2-3 hours. See Table 1 for the specific proportions of the prepared binder.

[0027] Table 1

[0028] raw material

Example 1

Example 2

Example 3 ...

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Abstract

The invention belongs to the technical field of welding materials, and in particular discloses a manufacturing method of a welding rod special for corrosion-resisting steel welding. The manufacturing method comprises the following steps: (1) preparation of an adhesive; (2) pretreatment of a coating; (3) preparation of the welding rod. The manufacturing method has the following technical advantages that due to reasonable formula design, the chromium content of a core wire of the welding rod is optimized; a small number of rare earth elements are added, and impurity elements are controlled; on the basis of ensuring that welding metal has certain intensity and low-temperature impact toughness, the welding rod is high in hydrogen sulfide corrosion and seawater corrosion resistance. The adopted adhesive is better in low and high-temperature resistance; core powder is difficult to slide off in a welding process; meanwhile, the melting speed of the core powder can be increased, and normal welding construction can be effectively guaranteed.

Description

technical field [0001] The invention belongs to the technical field of welding material preparation, and specifically discloses a method for manufacturing a special welding rod for corrosion-resistant steel welding. Background technique [0002] There are both hydrogen sulfide corrosion and seawater corrosion in oil and gas transportation, so the steel plate is required to have good sulfur corrosion resistance and good seawater corrosion resistance. Electrode is an important welding material for steel plate welding. In the process of matching corrosion-resistant steel welding, it is required that the weld metal not only has the characteristics of high strength and high toughness, but also has good resistance to hydrogen sulfide corrosion and seawater corrosion. , and the current matching electrodes have defects such as poor hydrogen sulfide corrosion resistance and insufficient impact toughness. [0003] Therefore, the development of a special electrode for corrosion-resist...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/40
CPCB23K35/40
Inventor 孙宁
Owner 浙江申嘉焊材科技有限公司