Metal powder core type heat resistant steel submerged arc welding wire and welding flux for 650 DEG C supercritical thermal power plant

A technology for metal powder cores and thermal power units, applied in metal processing equipment, welding media, welding equipment, etc., to achieve good physical and chemical properties, good welding process performance, and easy adjustment

Active Publication Date: 2018-06-29
KUSN GINTUNE WELDING
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  • Application Information

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  • Metal powder core type heat resistant steel submerged arc welding wire and welding flux for 650 DEG C supercritical thermal power plant
  • Metal powder core type heat resistant steel submerged arc welding wire and welding flux for 650 DEG C supercritical thermal power plant
  • Metal powder core type heat resistant steel submerged arc welding wire and welding flux for 650 DEG C supercritical thermal power plant

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[0040] The technical solutions of the present invention will be further described below in conjunction with specific examples, but the present invention is not limited to these examples.

[0041] A metal powder-cored heat-resistant steel submerged arc welding wire and flux for ultra-supercritical thermal power units at 650°C, using fluorine-alkali flux and metal powder-cored welding wire;

[0042] In terms of weight percentage, the metal powder cored wire composition content is: ferrochromium: 4-11%; metal manganese: 0.5-3%; ferrosilicon ≤ 4%; metal chromium: 35-40%; cobalt powder: 12- 16%; Tungsten powder: 12-16%; Niobium powder: 0.08-0.36%; Vanadium iron: 0.9-1.5%; Metal copper: 2.5-5.5%; Boron iron: 1-3%; Compound ≤ 1%; the balance is metallic iron;

[0043] In terms of weight percentage, the composition content of the fluorine-alkali type flux is: CaF 2 :20-35; Al 2 o 3 : 10-30; SiO 2 : 5-20; CaO: 25-40; ZrO 2 : 0.5-2; Na 2 O: 0.5-3; K 2 O: 1-5;

[0044] In terms ...

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Abstract

The invention provides a metal powder core type heat resistant steel submerged arc welding wire and a welding flux for a 650 DEG C supercritical thermal power plant. Mainly relying on the ratio of metal powder core welding wire welding flux, a fluorine-alkaline system welding flux formula is matched, a tiny quantity of alloy elements are added, the main component of deposition metal is 9% Cr-3% W-3% Co, the welding technological performance is good, under thermal treatment conditions of 100 DEG C*1 h and 780 DEG C*3 h, the tensile strength Rm of the deposition metal is larger than or equal to680 MPa, common temperature KV2 is larger than or equal to 50 J, the welding contactor tensile strength Rm of the deposition metal is larger than or equal to 680 MPa, the common temperature KV2 is larger than or equal to 50 J, at the temperature of 700 DEG C or above, the mechanical performance like the yield strength, the tensile strength and the ductility is good, and the metal powder core typeheat resistant steel submerged arc welding wire and the welding flux are suitable for welding steel for a 650 DEG C and 700 DEG C supercritical thermal power plant.

Description

technical field [0001] The invention belongs to the field of welding materials, and in particular relates to a metal powder-cored heat-resistant steel submerged arc welding wire and flux for a 650°C ultra-supercritical thermal power unit. Background technique [0002] With the development of large-scale and large-scale electric power industry, as well as the requirements of energy saving and emission reduction in the process of industrialization, energy saving and emission reduction and strengthening of environmental protection have attracted great attention at home and abroad. The use of high-efficiency ultra-supercritical units is one of the effective ways to prevent environmental pollution. For thermal power units, increasing the operating temperature can greatly improve the efficiency of use, thereby achieving the goal of energy saving and emission reduction. Therefore, increasing the temperature of ultra-supercritical power plants plays a decisive role in realizing my ...

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Application Information

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IPC IPC(8): B23K35/30B23K35/36
CPCB23K35/3086B23K35/3605
Inventor 蔡鸿祥郑伊洛周峙宏
Owner KUSN GINTUNE WELDING
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