Active welding flux for tungsten inert gas argon arc welding of hull steel and preparation method and use method thereof

A tungsten inert gas, active flux technology, applied in welding equipment, welding medium, manufacturing tools, etc., can solve problems such as blanks, and achieve the effect of no pores, improved efficiency, and good forming.

Active Publication Date: 2020-09-29
BEIBU GULF UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But for low-alloy steel, especially the active flux formula used in the field of ship welding EH36 marine steel, it is almost blank at present

Method used

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  • Active welding flux for tungsten inert gas argon arc welding of hull steel and preparation method and use method thereof
  • Active welding flux for tungsten inert gas argon arc welding of hull steel and preparation method and use method thereof
  • Active welding flux for tungsten inert gas argon arc welding of hull steel and preparation method and use method thereof

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preparation example Construction

[0028] See figure 1 The present invention also proposes a preparation method of active flux for marine steel tungsten inert gas argon arc welding, comprising the following steps:

[0029] S10: Grinding and pulverizing chromium trioxide, zinc oxide, silicon dioxide, titanium oxide, and calcium oxide, and then sieving to obtain a solid phase oxidation mixture.

[0030] S11: In this step, manual grinding or mechanical grinding can be used, for example: Weigh chromium trioxide, zinc oxide, silicon dioxide, titanium oxide, and calcium oxide according to the mass parts of the raw materials and put them into the mortar together Grinding into powder, and then using a sieve with a pore size of less than 74 microns to screen the ground powder, so that the particle size of the ground solid phase oxide is less than 74 microns.

[0031] S12： Put the solid-phase oxidation mixture into a drying room with a relative humidity of 40% for 2h-3h.

[0032] S20: After drying the solid-phase oxid...

Embodiment 1

[0036] Put 30% chromium trioxide, 25% zinc oxide, 15% silicon dioxide, 25% calcium oxide plus titanium oxide into a grinding vessel and grind to powder, and then use a sieve with a pore size of less than 74 microns to grind the ground The powder is screened so that the particle size of the ground solid phase oxide is less than 74 microns; the solid phase oxidation mixture is placed in a drying room with a relative humidity of 40% for 2 hours; the dried solid phase oxidation mixture is placed in a container , evenly add 5% dimethyl ketone, in the process of adding dimethyl ketone, constantly stir the solid phase oxidation mixture and dimethyl ketone, so that the mixture of the two is adjusted to a paste, and the marine steel tungsten of the present invention is obtained Active flux for argon arc welding with extremely inert gases.

Embodiment 2

[0038] Put 27% chromium trioxide, 27% zinc oxide, 16% silicon dioxide, 24% calcium oxide plus titanium oxide into a grinding vessel and grind them into powder, and then use a sieve with a pore size of less than 74 microns to grind Screen the powder so that the particle size of the ground solid phase oxide is less than 74 microns; put the solid phase oxidation mixture into a drying room with a relative humidity of 40% for 2.5 hours; put the dried solid phase oxidation mixture into In the container, add 6% dimethyl ketone evenly, and in the process of adding dimethyl ketone, constantly stir the solid-phase oxidation mixture and dimethyl ketone, so that the mixture of the two is adjusted to a paste, and the marine ketone of the present invention is obtained. Active flux for tungsten inert gas argon arc welding of steel.

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Abstract

The invention discloses an active welding flux for tungsten inert gas argon arc welding of hull steel and a preparation method and a use method thereof. The active welding flux for tungsten inert gasargon arc welding of hull steel comprises 27%-33% of chromic oxide, 20%-30% of zinc oxide, 15%-25% of silicon dioxide, 24%-28% of calcium oxide and titanium oxide and 5%-10% of dimethyl ketone. The active welding flux for tungsten inert gas argon arc welding of hull steel contains silicon dioxide and multiple oxides, so that a weld penetration depth and a depth-width ratio of a target work piece can be greatly improved during low alloy steel welding, and welding efficiency is increased. In addition, after welding with the active welding flux for tungsten inert gas argon arc welding of hull steel, the welding surface of the target work piece is shaped well without slag inclusion or air holes, and has rational excess weld reinforcement and a rational weld width. In addition, the active welding flux can to a certain extent increase the hardness of a base material at weld joints and thermal influence area and near the weld joints. As verified by a tensile experiment, after use of the active welding flux disclosed by the invention, tensile strengths at all the weld joints are higher than the strength of the base material

Description

technical field [0001] The invention relates to the technical field of ship welding, in particular to an active flux for marine steel tungsten inert gas argon arc welding and its preparation method and use method. Background technique [0002] TIGTungsten Inert Gas Welding (TIGTungsten Inert Gas Welding) welding technology was first proposed by Ukrainian Barton Research in the 1960s, and it has been extensively studied in China since the 1990s. But for low-alloy steels, especially the active flux formulations for EH36 marine steel used in the field of ship welding, there is almost no active flux formulation at present. Contents of the invention [0003] The main purpose of the invention is to provide an active flux for marine steel tungsten inert gas argon arc welding, aiming at improving the penetration depth and welding efficiency of low-alloy steel welds. [0004] In order to achieve the above object, the active flux of the marine steel tungsten inert gas argon arc wel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/36B23K35/362B23K35/40
CPCB23K35/36B23K35/362B23K35/40B23K35/3601
Inventor 张立志石南辉张蕾蕾黄贵朗张丽张世业朱丽萍
Owner BEIBU GULF UNIV
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