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High-strength austenitic stainless steel submerged-arc welding wire

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

Inactive Publication Date: 2014-01-22
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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  • High-strength austenitic stainless steel submerged-arc welding wire
  • High-strength austenitic stainless steel submerged-arc welding wire

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Embodiment Construction

[0032] The present invention will be further described below through embodiment.

[0033] The chemical composition of the welding wire of the present invention and the tensile strength of the welded joint are listed in Table 1 and Table 2 respectively. The welded joint of the austenitic stainless steel welding material of the present invention has excellent high temperature strength and can be used for welding of pressure vessel equipment under high temperature or fix.

[0034] The test uses four kinds of welding wires to be prepared by the same production process. The diameter of the welding wire is 2.5mm, the supporting welding is SJ601H, the welding base metal is 316L (N), the welding process parameters are: arc voltage 28V, welding current 400A, welding speed 300mm / min, the mechanical properties and corrosion resistance of the deposited metal were measured after welding. Among them, the corrosion resistance is in accordance with the sulfuric acid-copper sulfate standard i...

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Abstract

The invention provides a high-strength austenitic stainless steel submerged-arc welding wire and belongs to the technical field of welding wires. Chemical components of the stainless steel welding wire comprise, by mass, C<=0.025%, Si<=1.00%, Mn<=2.50%, P<=0.020%, S<=0.010%, 12.00-14.00% of Ni, 18.00-20.00% of Cr, 2.00-3.00% of Mo, 0.05-0.10% of N, Nb<=0.150% and the balance iron. High-temperature ferrite delta in cast-condition austenitic stainless steel is 8-15%. By means of the welding wire, the problem that a device is poor in weld line mechanical property when the device runs at high temperature for a long time is solved. The welding wire can be mainly used for welding materials for energy industry, chemical industry and the like at high temperature and under high pressure.

Description

technical field [0001] The invention provides a high-strength austenitic stainless steel submerged arc welding wire, which belongs to the technical field of welding wire. The welding wire can solve the problem of insufficient mechanical properties of the weld seam under long-term operation of the equipment at high temperature. The welding wire of the invention can be mainly used for welding materials under high temperature and high pressure conditions such as energy and chemical industry. Background technique [0002] 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. For example, the construction of nuclear power plants requires a large amount of austenitic stainless steel. At present, most of the nuclear power plants under construction in China are pressurized water reactor nuclear power plants, and the tempe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/30
CPCB23K35/308
Inventor 淮凯文
Owner DANYANG HUALONG SUPERIOR STEEL
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