Ship-building steel small-groove submerged-arc welding agent and preparation method thereof

A technology for marine steel and grooves, applied in welding equipment, welding media, manufacturing tools, etc., can solve the problems of lack of weld mechanical properties, insufficient flux slag removal, and high requirements for flux particles, and achieve good slag removal. Welding process performance and mechanical properties, good effect of welding quality

Inactive Publication Date: 2017-05-31
SHANGHAI HULIN HEAVY IND +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is believed that the melting point, viscosity and surface tension of this invention have reached a relatively reasonable coordination and unity during the welding process, the welding arc is stable, and the appearance and quality of the weld seam are good. However, narrow gap welding requires small flux particles to ensure sufficient penetration into the root of the weld bead. However, the particles are small and easy to miss, the requirements for flux particles are high, the production cost is high, and the slag removal performance of the flux is still slightly insufficient
Due to no groove opening, the residual stress after welding is relatively large, and the mechanical properties of the weld are slightly lacking

Method used

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  • Ship-building steel small-groove submerged-arc welding agent and preparation method thereof

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Effect test

Embodiment 1

[0036] A marine steel small groove submerged arc welding flux, its mineral raw material components account for the following weight percentages: fluorite: 20%; magnesia: 20%; rutile: 14%; white corundum: 15%; wollastonite: 18%; manganese ore: 10%; ferrosilicon: 3%. The preparation method of the flux is first to dry mix the powder weighed by weight percentage in a dry mixer, put it into a wet mixer after dry mixing evenly, add water glass with a total weight of 24% of the ingredients for wet mixing, and wet mix evenly Send the wet powder to the granulation tray through the conveyor belt for granulation, bake at 250°C to 300°C for 1 hour, and sieve the flux after removing moisture, and sieve the flux within the standard particle range at 750°C to 800°C Sinter at high temperature for 1 hour, and pass through a 10-mesh to 40-mesh sieve after cooling in the furnace to obtain the finished sintered flux.

Embodiment 2

[0038] A kind of marine steel small-groove submerged arc welding flux, its mineral raw material components account for the following weight percentages: fluorite: 10%; magnesia: 28%; rutile: 20%; white corundum: 24%; wollastonite: 10%; manganese ore: 1%; 45 ferrosilicon 7%. The preparation method of the flux is first to dry mix the powder weighed by weight percentage in a dry mixer, put it into a wet mixer after dry mixing evenly, add water glass with a total weight of 24% of the ingredients for wet mixing, and wet mix evenly Send the wet powder to the granulation tray through the conveyor belt for granulation, bake at 250°C to 300°C for 1 hour, and sieve the flux after removing moisture, and sieve the flux within the standard particle range at 750°C to 800°C Sinter at high temperature for 1 hour, and pass through a 10-mesh to 40-mesh sieve after cooling in the furnace to obtain the finished sintered flux.

Embodiment 3

[0040]A kind of marine steel small-groove submerged arc welding flux, its mineral raw material components account for the following weight percentages: fluorite: 14%; magnesia: 15%; rutile: 10%; white corundum: 30%; wollastonite: 25%; manganese ore: 5%; 45 ferrosilicon: 1%. The preparation method of the flux is first to dry mix the powder weighed by weight percentage in a dry mixer, put it into a wet mixer after dry mixing evenly, add water glass with a total weight of 24% of the ingredients for wet mixing, and wet mix evenly Send the wet powder to the granulation tray through the conveyor belt for granulation, bake at 250°C to 300°C for 1 hour, and sieve the flux after removing moisture, and sieve the flux within the standard particle range at 750°C to 800°C Sinter at high temperature for 1 hour, and pass through a 10-mesh to 40-mesh sieve after cooling in the furnace to obtain the finished sintered flux.

[0041] Use the above flux with GB / T H10MnSi submerged arc welding wi...

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Abstract

The invention discloses a ship-building steel small-groove submerged-arc welding agent and a preparation method thereof. The ship-building steel small-groove submerged-arc welding agent comprises the following raw materials, by weight, of 15-28% of magnesite, 15-30% of white corundum, 10-25% of grammite, 10-20% of fluorite, 10-20% of rutile, 1-10% of manganese ores and 1-7% of silicon iron. The sum of the weight percentage of the components is 100%. The ship-building steel small-groove submerged-arc welding agent has low hygroscopicity; electric arc welding is stable; the slag detachability of the welding agent after welding is good; the appearance of a welded joint is attractive after forming; slag shells can automatic cock after welding; and no defects such as undercuts exist. The production efficiency is high, the comprehensive cost is low, the welding quality is good, and the welding agent is quite suitable for submerged arc welding under the condition of small grooves of ship-building steel.

Description

technical field [0001] The invention belongs to the technical field of welding materials, in particular to a small-groove submerged arc welding flux for marine steel and a preparation method thereof. Background technique [0002] With the rapid development of my country's heavy industry, submerged arc automatic welding is widely used in industrial production due to its advantages of convenient operation, simple use, and no arc light. Therefore, the demand for sintering flux in my country is also increasing, and domestic The research and development of sintered flux focuses on the development of sintered flux for different welding materials and special welding environments. With the development of modern industry, the thickness of the plates used in the welding process is increasing, and most of the butt welding of thick plates must be grooved according to the specifications. Reducing the size of the bevel when welding thick plates can reduce the influence of welding heat inp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/362B23K35/40
CPCB23K35/362B23K35/40
Inventor 周鸿翔吴兴祥冯师超吕文超周方明
Owner SHANGHAI HULIN HEAVY IND
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