All position welding low hydrogen type electrode excellent in low temperature impact toughness and for SA-508Gr.4N steel

A sa-508gr.4n, low-temperature impact toughness technology, applied in welding equipment, welding medium, welding/cutting medium/material, etc., can solve the problems of poor low-temperature impact toughness, not suitable for all-position welding, etc., and achieve arc stability, Excellent all-position welding process performance, uniform melting effect

Inactive Publication Date: 2019-10-25
HARBIN WELL WELDING CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problems of poor low-temperature impact toughness and unsuitability for all-position welding of the low-hydrogen type electrode for SA-508Gr. Low Hydrogen Electrode

Method used

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  • All position welding low hydrogen type electrode excellent in low temperature impact toughness and for SA-508Gr.4N steel
  • All position welding low hydrogen type electrode excellent in low temperature impact toughness and for SA-508Gr.4N steel
  • All position welding low hydrogen type electrode excellent in low temperature impact toughness and for SA-508Gr.4N steel

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specific Embodiment approach 1

[0016] Specific embodiment one: The SA-508Gr.4N steel all-position welding low-hydrogen type electrode with excellent low-temperature impact toughness of this embodiment includes a welding core and a coating; the welding core is composed of C≤0.04% by weight. Si≤0.015%, Mn≤0.50%, S≤0.004%, P≤0.008% and the balance Fe; the coating includes powder and binder; the powder is composed of 30% to 42% by weight % Marble, 20% to 30% fluorite, 4% to 10% strontium carbonate, 3% to 8% titanium dioxide, 2% to 7% quartz, 1% to 3% yttrium-based ferrosilicon, 4% to 8% ferro-titanium, 3% to 7% electrolytic manganese, 3% to 6% medium carbon ferromanganese, 3% to 10% nickel powder, 0.5% to 1% soda ash and 0.5% to 1 % Potassium alginate.

[0017] In this embodiment, the sum of the weight percentages of the components in the powder is 100%.

[0018] In this embodiment, the preparation of SA-508Gr.4N steel with excellent low-temperature impact toughness for all-position welding low-hydrogen electrode:...

specific Embodiment approach 2

[0025] Specific embodiment two: This embodiment is different from the specific embodiment one in that the amount of the binder is 25% of the powder weight. Others are the same as the first embodiment.

specific Embodiment approach 3

[0026] Specific embodiment three: this embodiment is different from specific embodiment one in that the binder is potassium sodium water glass. Others are the same as the first embodiment.

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Abstract

The invention discloses an all position welding low hydrogen type electrode excellent in low temperature impact toughness and for SA-508Gr.4N steel, and relates to the weld material technology field.The all position welding low hydrogen type electrode excellent in low temperature impact toughness and for the SA-508Gr.4N steel solves the problems that an existing low hydrogen type electrode for the SA-508Gr.4N steel is poor in low temperature impact toughness and unsuitable for all position welding. The all position welding low hydrogen type electrode excellent in low temperature impact toughness and for the SA-508Gr.4N steel comprises a core wire and a coating, wherein the core wire consists of C, Si, Mn, S, P and the balance Fe, the coating consists of a powder material and a binding agent, and the power material consists of marble, fluorite, strontium carbonate, titanium dioxide, quartz, yttrium-based silicon iron, ferrotitanium, electrolytic manganese, mid-carbon ferromanganese, nickel powder, sodium carbonate and potassium alginate. The all position welding low hydrogen type electrode excellent in low temperature impact toughness and for the SA-508Gr.4N steel has excellent allposition welding technology performance, and is stable in electric arc, small in splashing amount and moderate in sleeving especially in vertical welding and overhead welding, melts the coating evenly, enables a weld pass to be beautiful in shaping, achieves good operability for welding operators, and has ideal mechanical performance. The all position welding low hydrogen type electrode excellentin low temperature impact toughness and for the SA-508Gr.4N steel is suitable for the all position welding of the SA-508Gr.4N steel.

Description

Technical field [0001] The invention relates to the technical field of welding materials. Background technique [0002] With the development of reactor pressure vessels in the direction of large-scale and integrated, the third-generation SA-508Gr.3 steel is difficult to ensure the uniformity and performance stability of the extra-thick section. In view of this, it has higher hardenability and strength. The new generation material SA-508Gr.4N steel with plasticity and toughness has received extensive attention in engineering. [0003] The composition of SA-508Gr.4N steel increases the content of Ni and Cr and reduces the content of C and Mn on the basis of SA-508Gr.3 steel to achieve better mechanical properties. The reduction of Mn content can reduce material segregation and temper brittleness sensitivity; the increase of Ni and Cr content can increase the hardenability of the material, and the increase of Ni content can also effectively improve the strength and low temperature to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/30B23K35/365
CPCB23K35/0272B23K35/3073B23K35/3602B23K35/365
Inventor 陈佩寅张学刚孙婷婷霍树斌陈燕胡鹏亮王庆江郑庆铭刘满雨宋昌洪王国佛陈波
Owner HARBIN WELL WELDING CO LTD
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