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A special ultra-low hydrogen electrode for welding e911 steel high-pressure steam pipelines and its preparation method

A technology of high-pressure steam and E911, which is applied in the direction of welding equipment, welding medium, welding/cutting medium/material, etc., to achieve the effect of uniform melting of the coating, good operability, and increased hardenability

Active Publication Date: 2022-02-11
HARBIN WELL WELDING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] With the continuous construction of ultra-supercritical units, garbage power generation and biomass power generation units, E911 steel will definitely become the material of choice for high-pressure steam pipes due to its excellent comprehensive mechanical properties. and organizational stability can meet the design and use requirements

Method used

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  • A special ultra-low hydrogen electrode for welding e911 steel high-pressure steam pipelines and its preparation method
  • A special ultra-low hydrogen electrode for welding e911 steel high-pressure steam pipelines and its preparation method
  • A special ultra-low hydrogen electrode for welding e911 steel high-pressure steam pipelines and its preparation method

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Effect test

specific Embodiment approach 1

[0039] Embodiment 1: A special ultra-low hydrogen electrode for welding E911 steel high-pressure steam pipelines in this embodiment is characterized in that the electrode is prepared from a welding core and a coating, and the coating is made of a coating The powder is mixed with potassium sodium water glass, and the coating powder is composed of 20-40 parts of calcite, 2-10 parts of barium carbonate, 17-28 parts of fluorite, 1-8 parts of quartz, and 1 part of rutile in parts by mass. ~7 parts, 0.5~2 parts of soda ash, 1~6 parts of ferrosilicon, 1~5 parts of electrolytic manganese, 0.5~5 parts of metal chromium powder, 0.5~4 parts of medium carbon ferrochromium, 0.5~4 parts of metal molybdenum powder, iron 2 to 15 parts of powder, 0.5 to 2 parts of aluminum-magnesium alloy, 2 to 5 parts of metal tungsten and 0.5 to 3 parts of titanium boron iron; the mass ratio of the coating to the welding core is 1: (2.0 to 5.0) , the mass ratio of the skin powder and potassium sodium water g...

Embodiment 1

[0043]Embodiment 1. A special ultra-low hydrogen electrode for welding E911 steel high-pressure steam pipelines in this embodiment is characterized in that the electrode is prepared from a welding core and a coating, and the coating is made of coating powder Material and potassium sodium water glass are mixed, and described coating powder is made of 36 parts of calcite, 7 parts of barium carbonate, 22 parts of fluorite, 3 parts of quartz, 7 parts of rutile, 0.5 part of soda ash, 45# silicon 3 parts of iron, 4 parts of electrolytic manganese, 1.5 parts of metal chromium powder, 3 parts of medium carbon ferrochrome, 1.3 parts of metal molybdenum powder, 13 parts of iron powder, 2 parts of aluminum-magnesium alloy, 4.4 parts of metal tungsten and 2 parts of ferro-titanium boron made;

[0044] The chemical composition and mass percentage of the welding core are C: 0.07%, Si: 0.1%, Mn: 0.35%, S: 0.002%, P: 0.003%, Cr: 8.0%, Ni: 0.3%, Mo: 0.85%, Nb: 0.06%, V: 0.2%, Cu: 0.03%, Ti: 0...

Embodiment 2

[0058] Embodiment 2, a special ultra-low hydrogen electrode for welding E911 steel high-pressure steam pipelines according to this embodiment is characterized in that the electrode is prepared from a welding core and a coating, and the coating is made of coating powder Material and potassium sodium water glass are mixed, and described coating powder is made of 38 parts of calcite, 5 parts of barium carbonate, 24 parts of fluorite, 4 parts of quartz, 6 parts of rutile, 1 part of soda ash, 45# silicon 3.2 parts of iron, 3.5 parts of electrolytic manganese, 1.8 parts of metal chromium powder, 2.8 parts of medium-carbon ferrochrome, 1 part of metal molybdenum powder, 10 parts of iron powder, 1.5 parts of aluminum-magnesium alloy, 4.8 parts of metal tungsten and 1 part of ferro-titanium boron made;

[0059] The chemical composition and mass percentage of the welding core are C: 0.07%, Si: 0.1%, Mn: 0.35%, S: 0.002%, P: 0.003%, Cr: 8.0%, Ni: 0.3%, Mo: 0.85%, Nb: 0.06%, V: 0.2%, Cu:...

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Abstract

A special ultra-low hydrogen electrode for welding E911 steel high-pressure steam pipelines and a preparation method thereof. The invention belongs to the technical field of welding materials. The purpose of the invention is to ensure the uniform distribution of alloy elements in the welding seam of the E911 steel high-pressure steam pipeline, and to ensure the stability of the mechanical properties of long-term operation. The electrode of the present invention is prepared from a welding core and a coating, the coating is formed by mixing coating powder and potassium sodium water glass, and the coating powder is composed of 20 to 40 parts of calcite, carbonic acid 2-10 parts of barium, 17-28 parts of fluorite, 1-8 parts of quartz, 1-7 parts of rutile, 0.5-2 parts of soda ash, 1-6 parts of ferrosilicon, 1-5 parts of electrolytic manganese, 0.5-5 parts of metal chromium powder 5 parts, 0.5-4 parts of medium-carbon ferrochromium, 0.5-4 parts of metal molybdenum powder, 2-15 parts of iron powder, 0.5-2 parts of aluminum-magnesium alloy, 2-5 parts of metal tungsten and 0.5-3 parts of ferro-titanium boron made. Method: uniformly mix the coating powder with potassium sodium water glass, then press-coat it on the welding core, then dry it at room temperature, dry it at low temperature and dry it at high temperature in sequence to obtain the welding rod.

Description

technical field [0001] The invention belongs to the technical field of welding materials, and in particular relates to a special ultra-low hydrogen electrode for welding E911 steel high-pressure steam pipelines and a preparation method thereof. Background technique [0002] With the rapid development of my country's national economy, the demand for energy is increasing, and the demand for electricity is increasing year by year. In order to reduce harmful and greenhouse gas emissions, the development trend of the thermal power industry is to adopt ultra-supercritical coal-fired power generation technology to improve high-temperature steam. The design parameters of the thermal power unit are improved to improve the thermal efficiency of the thermal power unit. The high-pressure steam pipeline of the thermal power unit works under the condition of high temperature and high pressure all the year round, which is one of the most critical equipment of the unit. E911 steel is added 1...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/30B23K35/36B23K35/365B23K35/40
CPCB23K35/3086B23K35/3602B23K35/365B23K35/40
Inventor 王庆江徐锴陈波陈佩寅霍树斌张学刚孙婷婷王猛胡鹏亮陈燕郭枭刘满雨胡晓波王纯吉荣亮
Owner HARBIN WELL WELDING CO LTD
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