Active flux for marine steel tungsten inert gas argon arc welding and its preparation method and use method

A tungsten inert gas and active flux technology, applied in welding equipment, manufacturing tools, welding media, etc., can solve blank problems and achieve the effect of no pores, good forming, and improved weld penetration.

Active Publication Date: 2022-01-11
BEIBU GULF UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 flux for marine steel tungsten inert gas argon arc welding and its preparation method and use method
  • Active flux for marine steel tungsten inert gas argon arc welding and its preparation method and use method
  • Active flux for marine steel tungsten inert gas argon arc welding and its preparation method and use method

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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 flux for marine steel tungsten inert gas argon arc welding, a preparation method and a use method thereof. Among them, the active flux for marine steel tungsten inert gas argon arc welding includes: including 27%-33% chromium oxide, 20%-30% zinc oxide, 15%-25% silicon dioxide, 24%-28% Calcium oxide plus titanium oxide and 5%‑10% dimethyl ketone. The active flux of the marine steel tungsten inert gas argon arc welding of the present invention contains silicon dioxide and various oxides, so it can greatly improve the weld penetration and depth-to-width ratio of the target workpiece when welding low-alloy steel , and the welding efficiency has been improved. At the same time, after welding with the active flux of tungsten inert gas argon arc welding for marine steel, the welding surface of the target workpiece has a good shape, no slag inclusions, no pores, reasonable reinforcement and fusion width. At the same time, the invention can increase the hardness of the weld seam, the heat-affected zone, and the base material near the weld seam to a certain extent. The tensile test proves that the tensile strength of the welding seam using the present invention is higher than that of the parent 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 Patents(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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