Novel stainless steel submerged-arc welding wire for improving tensile strength after heat treatment

A tensile strength, stainless steel technology, used in welding equipment, welding media, welding/cutting media/materials, etc., can solve problems such as inability to meet technical requirements, and achieve the effect of improving tensile strength

Active Publication Date: 2011-04-20
HARBIN WELL WELDING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The comparative column welding wire welding test shows that the tensile strength of the deposited metal after heat treatment is 480Mpa, which cannot meet the technical requirements for welding of the above-mentioned EPR nuclear power unit

Method used

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  • Novel stainless steel submerged-arc welding wire for improving tensile strength after heat treatment
  • Novel stainless steel submerged-arc welding wire for improving tensile strength after heat treatment

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Embodiment Construction

[0013] In order to better illustrate the advantages of the welding wire of the present invention, a comparative example and two examples of the invention are used to do a comparative test, the chemical composition and mechanical properties of the comparative example welding wire are basically the same as the existing three welding wires used for nuclear power units, and The welding wires of the two invention examples can meet the chemical composition and corresponding mechanical properties specified by the present invention.

[0014] The diameters of the three welding wires used in the test are all 4mm, and the supporting flux is SJ601H sintering flux. The welding process parameters are: welding current 550A, arc voltage 30V, welding speed 580mm / min, interlayer temperature ≤ 110°C. The mechanical properties and corrosion resistance of the deposited metal after heat treatment were measured respectively. The heat treatment process is: heating temperature 1080°C, holding time 20...

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Abstract

The invention provides a novel stainless steel submerged-arc welding wire for improving tensile strength after heat treatment, belonging to the technical field of stainless steel welding wires for submerged-arc welding. The stainless steel welding wire provided by the invention comprises the following chemical components in percentage by weight: not more than 0.025 percent of C, not more than 0.60 percent of Si, 1.00-2.50 percent of Mn, not more than 0.02 percent of S, not more than 0.02 percent of P, 19.00-22.00 percent of Cr, 0.00-11.00 percent of Ni, not more than 0.50 percent of Mo, not more than 0.20 percent of Co, 0.07-0.20 percent of N and the balance of Fe. The welding wire benefits the solution to the technical problem that the tensile strength of the deposited metal, generated after tailor-welding heat treatment is carried out on a reactor end socket, is not in accordance to design requirements. The welding wire in the invention is mainly used for the tailor welding of end socket materials of an EPR (Electron Paramagnetic Resonance) nuclear power machine set and the welding of other materials.

Description

technical field [0001] The invention proposes a new type of stainless steel submerged arc welding wire with improved tensile strength after heat treatment. The welding wire belongs to the field of welding stainless steel materials, and particularly relates to a nuclear power unit material whose tensile strength can still meet the technical requirements of nuclear power products after high temperature heat treatment stainless steel submerged arc welding wire. Background technique [0002] Many new requirements are put forward for welding technology in the manufacture of EPR nuclear power units. For example, the heads of large stainless steel vessels used in nuclear secondary equipment are made of Z2 CN 19-10 nitrogen-resistant stainless steel. Due to the insufficient size of the steel plate, tailor welding is required. The welding method is submerged arc welding. Tests have shown that the weakest part of this type of steel welded joint is the weld metal, that is, the deposit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/30
Inventor 徐锴陈波陈佩寅廖永平邹力维张学刚郑庆铭
Owner HARBIN WELL WELDING CO LTD
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