A kind of sintering flux for nickel-based alloy submerged arc welding and preparation method thereof

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

Inactive Publication Date: 2016-08-10
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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  • A kind of sintering flux for nickel-based alloy submerged arc welding and preparation method thereof
  • A kind of sintering flux for nickel-based alloy submerged arc welding and preparation method thereof
  • A kind of sintering flux for nickel-based alloy submerged arc welding and preparation method thereof

Examples

Experimental program
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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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PUM

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Abstract

A sintered flux for nickel-based alloy submerged arc welding, including dry powder composition and binder, the weight percentage of each component in the dry powder composition is: CaF 2 40-52%, Al 2 o 3 38~47%, CaCO 3 4 to 8%, metal aluminum powder 0.5 to 3%, sodium fluoroaluminate 0.5 to 3%; the binder uses potassium sodium 1:1 water glass, and the dosage accounts for 20 to 32% of the weight of the dry powder of the flux. The sintered flux for nickel-based alloy submerged arc welding according to the invention is matched with ERNiCrMo-3 welding wire, and has stable welding specifications, excellent slag removal performance, uniform weld bead width, moderate pile height, smooth transition with base metal, and no gas pressure pit on the weld surface , crystal lines, cracks and sticky slag and other defects.

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 recent ...

Claims

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Application Information

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Patent Type & Authority Patents(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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