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Gas-shielded flux-cored wire for maritime engineering

A technology of flux-cored welding wire and marine engineering, applied in welding medium, manufacturing tools, welding equipment, etc., can solve the problems of high production cost of flux-cored welding wire and insufficient production technology of flux-cored welding wire.

Inactive Publication Date: 2014-04-02
TIANJIN SAINTEAGLE WELDING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the problem that the existing flux-cored wire production technology is insufficient and the production cost of the flux-cored wire is too high, and to provide gas-shielded flux-cored wire for marine engineering

Method used

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  • Gas-shielded flux-cored wire for maritime engineering
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  • Gas-shielded flux-cored wire for maritime engineering

Examples

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Embodiment Construction

[0018] The present invention will be described in detail below in conjunction with specific embodiments. The following examples are for those skilled in the art to better understand the present invention, but do not limit the present invention in any way.

[0019] Table 2 shows the flux core composition of the gas-shielded flux-cored welding wire for marine engineering in Examples 1-16. The chemical composition of the low-carbon steel cold-rolled steel strip used is C≤0.07%, Si≤0.05%, Mn is 0.25%-0.5%, S≤0.025%, P≤0.025% (just for example, not as a limitation). Wherein S-1 represents embodiment 1, S-2 represents embodiment 2, and so on, S-16 represents embodiment 16.

[0020] In Table 2:

[0021]

[0022] S′-1: The outer diameter of the flux-cored wire containing the S-1 flux core is The flux core accounts for 10% of the mass of the flux cored wire;

[0023] S′-2: The outer diameter of the flux-cored wire containing S-2 flux core is The flux core accounts for 10% of ...

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Abstract

The invention discloses a gas-shielded flux-cored wire for maritime engineering. The flux-cored wire consists of a low-carbon steel outer skin and a flux core, wherein the flux core comprises the following components in percentage by mass: 40 to 65 percent of rutile, 0.3 to 5 percent of fluoride, 8 to 30 percent of other slag forming constituent, 2 to 7 percent of strong deoxidizer, 15 to 22 percent of weak deoxidizer, 3 to 12 percent of alloying agent and the balance of iron powder, and the alloying agent at least contains nickel powder which accounts for 2 to 5 percent of the total mass of the flux core. The flux-cored wire disclosed by the invention is good in manufacturability and mechanical property which reach the standard level of the titanium type flux-cored wire of which the main flux powder raw material is rutile, the yield strength Rel is greater than or equal to 375Mpa, the tensile strength Rm is 495 to 660Mpa, the elongation percentage A is greater than or equal to 22 percent, and the impact absorbing energy Akv(20 DEG C below zero) under the condition of 20 DEG C below zero is greater than or equal to 100J.

Description

technical field [0001] The invention belongs to the field of welding in material processing engineering, and relates to a flux-cored welding wire for welding metals, in particular to a gas-shielded flux-cored welding wire for ocean engineering. Background technique [0002] Flux-cored welding wire, as a new generation of "high-efficiency and environmentally friendly" welding materials, has been widely promoted in China since the 1990s. It has grown from scratch in more than ten years. It is one of the fastest-growing welding materials. Its development It marks the improvement of welding automation level. However, it should be noted that although China's flux-cored wire production has reached more than 500,000 tons, more than 98% of them are general-purpose products E501T1, and the technical threshold is relatively low. At present, the production capacity and newly-built production capacity of more than 70 enterprises in the country are over 700,000 tons. The production capa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/32B23K35/362
CPCB23K35/0266B23K35/3073B23K35/3608
Inventor 胡铁牛白英华
Owner TIANJIN SAINTEAGLE WELDING CO LTD
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