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Austenitic stainless steel submerged-arc welding wire with excellent high-temperature strength

A technology of austenitic stainless steel and high-temperature strength, which is applied in the direction of welding medium, welding equipment, welding/cutting medium/material, etc., and can solve problems such as insufficient mechanical properties of welds

Inactive Publication Date: 2013-09-25
DANYANG HUALONG SUPERIOR STEEL
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Problems solved by technology

The welding wire can solve the problem of insufficient mechanical properties of the weld seam in the long-term operation of the material in the pressurized water reactor environment

Method used

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  • Austenitic stainless steel submerged-arc welding wire with excellent high-temperature strength
  • Austenitic stainless steel submerged-arc welding wire with excellent high-temperature strength

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Embodiment Construction

[0038] The present invention will be further described below through embodiment.

[0039] The chemical composition of the welding wire of the present invention and the tensile strength of the welded joint are respectively listed in Table 1 and Table 2. In order to compare the excellence of the welding wire of the present invention, a comparative test is also performed on the conventionally used ER308L welding wire and listed in the table. The ferrite δ content in Table 2 is calculated using the following formula: Cont(δ)=3*(Cr+Mo)+4.5*Si-2.8*Ni-1.4*Mn-84*(C+N)-19.8. It can be seen from Table 2 that, compared with common comparative example 1, the austenitic stainless steel welding consumable welding joint of the present invention has excellent high-temperature strength, and can be used for welding or repairing equipment in a nuclear island reactor at a temperature of 350°C .

[0040] The four kinds of welding wires used in the test were prepared by the same production proce...

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Abstract

The invention provides an austenitic stainless steel submerged-arc welding wire with excellent high-temperature strength and belongs to the technical field of welding wires. The stainless steel welding wire provided by the invention comprises the following chemical components by mass percent: 0 to 0.025% of C, 0 to 1.00% of Si, 0 to 2.50% of Mn, 0 to 0.020% of P, 0 to 0.020% of S, 9.00% to 12.00% of Ni, 18.00% to 20.00% of Cr, 0 to 0.50% of Mo, 0.06% to 0.12% of N, 0.05% to 0.30% of Nb, 0 to 0.018% of Co, 0-0.30% of one or more of the rare-earth elements Ce, Dy, Y and Nd, and Fe in balancing amount; the high temperature ferrite Delta in the austenitic stainless steel under cast condition is 1% to 3%. The welding wire can solve the problem that the mechanical property of a long-time running weld joint is insufficient in the environment of material pressurized water reactor. The welding wire provided by the invention is mainly applied to weld critical components in a pressurized water reactor nuclear island.

Description

[0001] technical field [0002] The invention provides an austenitic stainless steel submerged arc welding wire with excellent high-temperature strength, which belongs to the technical field of welding wires. The welding wire can solve the problem of insufficient mechanical properties of the long-term operation weld seam in the pressurized water reactor environment of the material. The welding wire of the invention can be mainly used for welding key parts in the nuclear island of the pressurized water reactor. [0003] Background technique [0004] Austenitic stainless steel is widely used in petroleum, chemical, aerospace and energy fields due to its good ductility, cold and hot workability and localized corrosion resistance at high and very low temperatures. Among them, the construction of nuclear power plants requires the use of a large amount of austenitic stainless steel. At present, most of the nuclear power plants under construction in China are pressurized water r...

Claims

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Application Information

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IPC IPC(8): B23K35/30
Inventor 淮凯文
Owner DANYANG HUALONG SUPERIOR STEEL
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