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A stainless steel strip submerged arc surfacing flux

A technology of stainless steel strip and flux, applied in the direction of welding equipment, welding medium, welding/cutting medium/material, etc., to achieve the effect of excellent intergranular corrosion performance, smooth lap joint, and excellent comprehensive welding process

Active Publication Date: 2018-10-09
725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

None of the above patents involves welding with EQ309LMo and EQ316L, post-weld heat treatment and lateral bending

Method used

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  • A stainless steel strip submerged arc surfacing flux
  • A stainless steel strip submerged arc surfacing flux
  • A stainless steel strip submerged arc surfacing flux

Examples

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Effect test

Embodiment 1

[0033] A stainless steel strip submerged arc surfacing flux that can carry out post-weld heat treatment. According to the weight percentage, the flux consists of 31% magnesia, 6% fluorite, 15% alumina, 3% metal chromium, 4% It is made of metal molybdenum, 12% quartz, 3% sodium fluoroaluminate, 4% calcium aluminate, 1% carboxymethyl cellulose and 21% pure sodium water glass.

Embodiment 2

[0035] A stainless steel strip submerged arc surfacing flux that can carry out post-weld heat treatment. According to the weight percentage, the flux consists of 31% magnesia, 4% fluorite, 13% alumina, 2% metal chromium, 3% It is made of metal molybdenum, 14% quartz, 4% sodium fluoroaluminate, 3% calcium aluminate, 2% carboxymethyl cellulose and 24% pure sodium water glass.

Embodiment 3

[0037] A stainless steel strip submerged arc surfacing flux that can carry out post-weld heat treatment. According to the weight percentage, the flux consists of 33% magnesia, 3% fluorite, 12% alumina, 3% metal chromium, 4% It is made of metal molybdenum, 13% quartz, 5% sodium fluoroaluminate, 2% calcium aluminate, 3% carboxymethyl cellulose and 22% pure sodium water glass.

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Abstract

The invention discloses stainless steel band electrode submerged arc surfacing flux allowing postweld heat treatment, and belongs to flux used in the metal welding field. The flux is formed by mixing, by weight ratio, 31-33% of magnesite, 3-6% of fluorite, 12-15% of aluminium oxide, 2-3% of metal chromium, 3-4% of metal molybdenum, 10-14% of quartz, 3-5% of sodium fluoroaluminate, 2-4% of calcium aluminate, 1-3% of carboxymethylcellulose and 21-24% of pure sodium silicate. When the flux is matched with an EQ309LMo and EQ316L solder strip, postweld heat treatment can be carried out, and the bending performance (especially lateral bending with t is equal to 3mm) and intergranular corrosion resistance are good, and the steel band electrode submerged arc surfacing flux allowing postweld heat treatment can be applied to inner wall surfacing welding of high-temperature containers such as hydrogenation reactors and coal gasifiers.

Description

technical field [0001] The invention relates to a flux used in the field of metal welding, in particular to a stainless steel strip submerged arc surfacing flux capable of heat treatment after welding. Background technique [0002] 316L (022Cr17Ni12Mo2) stainless steel has good corrosion resistance and high temperature performance, and is widely used in high temperature equipment such as hydrogenation reactors and coal gasifiers. The shells of high-temperature equipment such as hydrogenation reactors are mostly chrome-molybdenum heat-resistant steel, and most of them are large thick plates. The corrosion-resistant layer of 316L stainless steel is not suitable for direct compounding (explosive compounding or rolling compounding), and it should be done in the form of surfacing welding. combined. The dilution rate of strip submerged arc surfacing welding is relatively high, so EQ309LMo welding strip should be used as the transition layer, and EQ316L welding strip should be use...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/362
CPCB23K35/3602B23K35/362
Inventor 孔红雨王青云张文军
Owner 725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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