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Submerged arc welding flux and wire for welding ultra-low temperature high manganese steel and preparation methods

A welding method and high-manganese steel technology, applied in welding equipment, welding equipment, arc welding equipment, etc., can solve the problems of low tensile strength of joints, inapplicability, irregular welds, etc., and achieve good mechanical properties and good forming The effect of beautiful appearance and excellent mechanical properties

Active Publication Date: 2019-03-29
ATLANTIC CHINA WELDING CONSUMABLES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] As we all know, the higher the manganese content is, the more difficult it is for the process and mechanical properties of the welding material. The higher the Mn content of the base metal and welding material, the more obvious the degree of metallurgical reaction in the welding process. Higher, after recent years of development, in order to improve the creep strength, durable strength and structural stability of the steel, a small amount of chromium, nickel, molybdenum, copper and other elements have been added to the steel, but how to ensure that after welding, the welded joint It has the same performance as the base metal under various corrosive media conditions such as ultra-low temperature and high pressure, which is a test for welding materials. In the existing welding materials, although some submerged arc fluxes are disclosed, such as CN107206549A (flux for submerged arc welding ), but the flux disclosed by it is used for welding the high-manganese steel of the present invention (such as manganese-carbon ratio 20), after welding, there are pores, slag inclusions and cracks inside the weld, and the low-temperature impact toughness of the weld metal (-196°C) is lower than 90J, not suitable for welding in narrow gaps, the tensile strength of joints is low, and the welds are irregular

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] SiO 2 5kg, MgO 35kg, Al 2 o 3 35kg, CaF 2 15kg, TiO 2 5kg, Fe 2 o 3 3kg, S 0.015kg, P0.010kg powders are automatically added to the mixer (the order of addition is SiO 2 --Al 2 o 3 --CaF 2 --MgO--TiO 2 , after mixing evenly, add Fe which has been mixed evenly 2 o 3 , S, P mixture and continue to stir), stir for more than 15 minutes, then add 20kg of sodium water glass to mix and adjust the powder. Machine mixing and granulation, followed by pre-drying at 100°C, low-temperature baking at 200°C, high-temperature sintering at 800°C, and screening to obtain flux with an alkalinity of 2.0.

[0039] This flux is matched with welding wire (the welding wire composition is: carbon 0.15wt%, silicon 0.3wt%, manganese 17wt%, chromium 4wt%, nickel 6wt%, molybdenum 3wt%, copper 0.3wt%, nitrogen 0.12wt%, aluminum 0.05 wt%, sulfur 0.005wt%, phosphorus 0.007wt%, the balance is iron and essential impurities), using 20mm thick A1106-Mn25 steel for submerged arc welding, ...

Embodiment 2

[0041] SiO 2 3kg, MgO 40kg, Al 2 o 3 30kg, CaF 2 18kg, TiO 2 6kg, Fe 2 o 3 2kg, S 0.014kg, P0.010kg powders are automatically added to the mixer (the order of addition is SiO 2 --Al 2 o 3 --CaF 2 --MgO--TiO 2 , after mixing evenly, add Fe which has been mixed evenly 2 o 3 , S, P mixture and continue to stir), stir for more than 15 minutes, then add 20kg of sodium water glass to mix and granulate, then pre-dry at 100°C, bake at 200°C at low temperature, sinter at 800°C, and sieve to obtain alkalinity for 2.7 flux.

[0042] This welding flux is matched with welding wire (the welding wire component composition is: carbon 0.30wt%, silicon 0.4wt%, manganese 25wt%, chromium 3wt%, nickel 9wt%, molybdenum 4wt%, copper 0.5wt%, nitrogen 0.15wt%, aluminum 0.10wt% wt%, sulfur 0.005wt%, phosphorus 0.007wt%, the balance is iron and essential impurities), using 20mm thick A1106-Mn25 steel for submerged arc welding, the process performance is excellent, and the performance o...

Embodiment 3

[0044] SiO 2 6kg, MgO 30kg, Al 2 o 3 40kg, CaF 2 15kg, TiO 2 3kg, Fe 2 o 3 3kg, S 0.015kg, P0.010kg powders are automatically added to the mixer according to the specific gravity requirements (the order of addition is SiO 2 --Al 2 o 3 --CaF 2 --MgO--TiO 2 , after mixing evenly, add Fe which has been mixed evenly 2 o 3 , S, P mixture and continue to stir), stir for more than 15 minutes, then add 20kg of sodium water glass to mix and granulate, then pre-dry at 100°C, bake at 200°C at low temperature, sinter at 800°C, and sieve to obtain alkalinity for 1.7 flux.

[0045] This welding flux is matched with welding wire (the welding wire component composition is: carbon 0.50wt%, silicon 0.33wt%, manganese 21wt%, chromium 6wt%, nickel 10wt%, molybdenum 5wt%, copper 0.8wt%, nitrogen 0.20wt%, aluminum 0.01 wt%, sulfur 0.005wt%, phosphorus 0.007wt%, the balance is iron and essential impurities), using 20mm thick A1106-Mn25 steel for submerged arc welding, the process p...

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Abstract

The invention discloses a submerged arc welding flux for welding ultra-low temperature high manganese steel. The flux is prepared by the following components, by weight: 3-6 parts of SiO2, 30-50 partsof MgO, 30-40 parts of Al2O3, 10-20 parts of CaF2, 3-10 parts of TiO2, more than 0 and not more than 3.0 parts of Fe2O3, more than 0 and not more than 0.020 part of S and more than 0 and not more than 0.015 part of P. Compared with the prior art, the flux has the advantages of good welding processability, excellent slag removal, beautiful shape and better mechanical performance. The welding wireand flux of the invention can replace a nickel-based base material and welding material when welding ultra-low temperature high manganese having a manganese content of 13% or more and can meet the ultra-low temperature requirements of -196 DEG C.

Description

technical field [0001] The invention relates to the field of welding, in particular to a submerged arc welding flux, welding wire and a preparation method for welding ultra-low temperature high manganese steel. Background technique [0002] Due to problems such as the cost and resources of nickel-based materials, it is hoped that there will be a material that can replace nickel-based materials and have properties equivalent to those of nickel-based materials. For this reason, after research, high manganese steel is used to replace nickel-based materials. Due to the special composition of high manganese steel, in addition to good wear resistance, it also has good mechanical properties, and is often used in mining, excavation, and coal industries. , foundry and steel industries, etc. The manganese content of the commonly used high-manganese steel is low. This kind of steel is difficult to machine and is basically used in the form of cast iron. After being cold and deformed in...

Claims

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Application Information

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IPC IPC(8): B23K9/18B23K35/30B23K35/36B23K35/40
CPCB23K9/186B23K35/3073B23K35/3605B23K35/361B23K35/40
Inventor 毛兴贵杨飞蒋勇张晓柏明廷泽范银东彭祺珉贾兴旺廖芬
Owner ATLANTIC CHINA WELDING CONSUMABLES
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