Sintered flux for use in submerged-arc welding of nickel-based alloy and preparation method

A nickel-based alloy and sintered flux technology, which is applied in arc welding equipment, welding equipment, welding equipment, etc., can solve the problems of low mechanical properties of deposited metal, high impurity content, and unclean slag removal, and achieve stable welding specifications. The effect of low impurity content and smooth transition

Inactive Publication Date: 2013-12-18
725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no domestic patent on nickel-based alloy submerged arc welding sintering flux. The nickel-based alloy submerged arc welding flux samples from several domestic welding consumable manufacturers that can be found all have dirty slag removal, high impurity content, and poor mechanical properties of the deposited metal. Low and other problems, at present, there is an urgent need to develop a nickel-based alloy submerged arc welding sintered flux with good welding process performance, low oxidation, less impurity elements, and good mechanical properties of deposited metal.

Method used

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  • Sintered flux for use in submerged-arc welding of nickel-based alloy and preparation method
  • Sintered flux for use in submerged-arc welding of nickel-based alloy and preparation method
  • Sintered flux for use in submerged-arc welding of nickel-based alloy and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Put the weight percentage as: CaF 2 40%, Al 2 o 3 47%, CaCO 3 7%, metal aluminum powder 3%, sodium fluoroaluminate 3% flux dry powder composition, put into a mixer and fully dry mix, then add 20% potassium sodium 1:1 water glass with a viscosity of about 800MPa·S and fully wet mix, and then mix The wet material is put into a granulator for granulation, and the prepared flux granules are sent to a 350°C rotary drying furnace for 40min low-temperature drying, and then sent to a rotary sintering furnace for high-temperature sintering at a sintering temperature of 800°C. The sintering time is 40 minutes, cooled after coming out of the furnace, sieved out 20-mesh flux particles, packaged, and put into storage after passing the inspection, and the flux preparation is completed.

Embodiment 2

[0027] Put the weight percentage as: CaF 2 52%, Al 2 o 3 38%, CaCO 3 6%, metal aluminum powder 3%, sodium fluoroaluminate 1% flux dry powder composition, put it into a mixer and fully dry mix it, then add 30% potassium sodium 1:1 water glass with a viscosity of about 800MPa·S and fully wet mix it, and then mix it The wet material is put into a granulator for granulation, and the prepared flux granules are sent to a 350°C rotary drying furnace for 60 minutes of low-temperature drying. After drying, they are sent to a rotary sintering furnace for high-temperature sintering. The sintering temperature is 850°C. The sintering time is 30 minutes, cooled after coming out of the furnace, 40-mesh flux particles are screened out, packaged, and put into storage after passing the inspection, and the preparation of the flux is completed.

Embodiment 3

[0029] Put the weight percentage as: CaF 2 46%, Al 2 o 3 45%, CaCO 38%, 0.5% metal aluminum powder, 0.5% sodium fluoroaluminate flux dry powder composition, put it into a mixer and fully dry mix, then add 28% potassium sodium 1:1 water glass with a viscosity of about 800MPa·S and fully wet mix, and then mix The wet material is put into a granulator for granulation, and the finished flux granules are sent to a 370°C rotary drying furnace for 50 minutes of low-temperature drying. After drying, they are sent to a rotary sintering furnace for high-temperature sintering. The sintering temperature is 830°C. The sintering time is 40 minutes, cooled after coming out of the furnace, screened out 60-mesh flux particles, packaged, and put into storage after passing the inspection, and the flux preparation is completed.

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Abstract

The invention discloses a sintered flux for use in submerged-arc welding. The sintered flux comprises a dry powder combination and a bonding agent, wherein the dry powder combination consists of the following components in percentage by weight: 40-52 percent of CaF2, 38-47 percent of Al2O3, 4-8 percent of CaCO3, 0.5-3 percent of metal aluminum powder and 0.5-3 percent of sodium fluoroaluminate, wherein the bonding agent consists of 1:1 potassium sodium water glass; the using amount of the bonding agent is 20-32 percent of the weight of the dry powder in the welded flux. The sintered flux for use in submerged-arc welding is matched with an ERNiCrMo-3 welding wire, has the advantages of standard and stable welding, excellent slag detachability, uniform width of a welding bead, appropriate pile height, smooth transition with parent metal and no defects of gas indentations, crystallization lines, cracks, bonded slag and the like on the surface of a welding line.

Description

technical field [0001] The invention belongs to the technical field of welding materials, and in particular relates to a sintered flux for nickel-based alloy submerged arc welding and a preparation method thereof. Background technique [0002] Nickel-based alloys are often used in equipment with harsh operating conditions and high safety requirements due to their excellent corrosion resistance and oxidation resistance. With the continuous and rapid development of my country's economy, the equipment manufacturing industry has become a pillar industry of the national economy. The prominent features of the development of the equipment manufacturing industry are: the parameters of stand-alone equipment are getting higher and higher, the conditions of use are becoming more and more harsh, and the requirements for safety are getting higher and higher. These technical characteristics have contributed to the continuous expansion of the application of nickel-based alloys. In rec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/362B23K9/18
Inventor 王效莲易传宝刘瞿
Owner 725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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