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Welding rod capable of improving low-temperature welding property of 9Cr1Mo heat resistant steel

A technology for low-temperature welding and heat-resistant steel, applied in the direction of welding medium, welding equipment, welding/cutting medium/material, etc., can solve the problems of low toughness of welded joints, easy cracks, poor weldability, etc., to improve low-temperature toughness, improve Effect of Low Temperature Solderability

Inactive Publication Date: 2012-08-22
JILIN PROVINCE ELECTRIC POWER RES INST OF JILIN ELECTRIC POWER CO LTD +4
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention provides an electrode that can improve the low-temperature welding performance of 9Cr1Mo heat-resistant steel, so as to solve the problems of poor weldability, low toughness of welded joints and easy occurrence of cracks in existing electrodes of this type

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] It consists of two parts, the welding core and the coating. The welding core is H08GX type welding core, and the coating is made of the following raw materials in weight percentage:

[0011] 40% marble, 20% fluorite, 0.5% synthetic mica, 0.5% titanium dioxide, 1% rutile, 1.5% microsilica, 1% ferromanganese, 7% ferrotitanium, 1% ferrosilicon, 0.5% ferrovanadium, niobium Iron 0.5%, Cr24.2%, Mo1%, nickel powder 1%, yttrium oxide 0.3%.

Embodiment 2

[0013] It consists of two parts, the welding core and the coating. The welding core is H08GX type welding core, and the coating is made of the following raw materials in weight percentage:

[0014] 30% marble, 15% fluorite, 1.25% synthetic mica, 1.25% titanium dioxide, 2% rutile, 2.75% silica fume, 2% ferromanganese, 9% ferrotitanium, 2% ferrosilicon, 1.25% ferrovanadium, niobium Iron 1%, Cr 27.1%, Mo 2%, nickel powder 2.5%, yttrium oxide 0.9%.

Embodiment 3

[0016] It consists of two parts, the welding core and the coating. The welding core is H08GX type welding core, and the coating is made of the following raw materials in weight percentage:

[0017] 30% marble, 10% fluorite, 2% synthetic mica, 2% titanium dioxide, 3% rutile, 4% silica fume, 3% ferromanganese, 11% ferrotitanium, 3% ferrosilicon, 2.0% ferrovanadium, niobium Iron 1.5%, Cr 20%, Mo 3%, nickel powder 4%, yttrium oxide 1.5%.

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PUM

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Abstract

The invention relates to a welding rod capable of improving a low-temperature welding property of 9Cr1Mo heat resistant steel, belonging to a welding rod. The welding rod comprises a welding core and a coating, wherein the welding rod is selected from an H08GX type welding rod, and the welding rod is characterized in that the coating is prepared by the following raw materials in percentages by weight: 30-40% of marble, 10-20% of fluorite, 0.5-2% of synthetic mica, 0.5-2% of titanium dioxide, 1-3% of rutile, 1.5-4% of silica fume, 1-3% of ferromanganese, 7-11% of ferrotitanium, 1-3% of silicon iron, 0.5-2.0% of ferrovanadium, 0.5-1.5% of ferroniobium, 20-30% of Cr, 1-3% of Mo, 1-4% of nickel powder and 0.3-1.5% of yttrium oxide. According to the invention, the low-temperature welding property of the steel is effectively improved, the low-temperature toughness of the welding joint is improved, the properties of the welding joint under the working parameters are ensured, and the welding rod is suitable for construction requirements under low-temperature environment in a northern area.

Description

technical field [0001] The invention belongs to a welding rod. Background technique [0002] Welding 9Cr1Mo steel in supercritical units with existing imported or domestic welding consumables in low temperature environment has poor weldability, low toughness of welded joints, and prone to defects such as cracks, especially not suitable for construction in low temperature environments in northern regions requirements. Contents of the invention [0003] The invention provides an electrode capable of improving the low-temperature welding performance of 9Cr1Mo heat-resistant steel to solve the problems of poor weldability of the existing electrode, low toughness of welded joints and easy cracks. [0004] The technical solution adopted by the present invention is: it consists of two parts, the welding core and the coating, wherein the welding core is selected from the H08GX type welding core, and the coating is made of the following raw materials in weight percentage: [0005...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/365
Inventor 杜好阳侯来昌杨坚王海国
Owner JILIN PROVINCE ELECTRIC POWER RES INST OF JILIN ELECTRIC POWER CO LTD