Electrogas welding gas shield flux-cored wire for large heat input welding

A technology of high-energy welding and flux-cored welding wire, which is applied in welding medium, welding equipment, welding/cutting medium/material, etc., and can solve the problems of poor welding process performance and poor weld formation.

Active Publication Date: 2011-04-13
SHOUGANG CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the gas-electric vertical welding flux-cored wire supplied on the market has defects such as poor welding process performance and poor w

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0008] Example 1: Sodium fluoride 2%; quartz 5%; rutile 2%; low carbon ferromanganese powder 18%; molybdenum iron powder 3%; rare earth silicon 3%; titanium iron 4%; nickel powder 12%; aluminum magnesium powder 5%; iron powder 46%. The powder filling rate is 17%. The above raw materials are mixed uniformly according to the formula ratio, dried, and then added to the ∪-shaped groove of SPCC steel strip at a certain filling rate, and then rolled, closed, and drawn to produce Φ1. 6mm flux cored wire, the following welding process is used to weld the deposited metal test plate: welding current 350A, welding voltage 40V, welding gas 100% CO 2 , Extension length 35mm, welding speed 80mm / Min. The test results of the mechanical properties of the welded joint are as follows: σs525Mpa; σb650Mpa; -20°C Akv135J.

Example Embodiment

[0009] Example 2: Potassium fluorozirconate 3%; quartz 3%; zircon sand 4%; low-carbon ferromanganese powder 14%; molybdenum iron powder 3%; rare earth silicon 3%; silicon zirconium iron powder 3%; nickel powder 14 %; Aluminum powder 2%; Magnesium powder 3%; Iron powder 48%. The powder filling rate is 17%. The above raw materials are mixed uniformly according to the formula ratio, dried, and then added to the ∪-shaped groove of the SPCC steel strip at a certain filling rate, and then rolled, closed, and drawn to produce Φ1. 6mm flux-cored wire, using the following welding process to weld the test board: welding current 350A, welding voltage 40V, welding gas 100% CO 2 , Extension length 35mm, welding speed 80mm / Min. The test results of the mechanical properties of the welded joints are as follows: σs515Mpa; σb640Mpa; -20℃Akv145J.

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Abstract

The invention discloses an electrogas welding gas shield flux-cored wire for large heat input welding, belonging to the technical field of high-efficiency high heat input welding. An SPCC (steel plate cold rolled commercial) steel tape with the size of 0.9*14 mm is used for manufacturing the flux-cored wire, the fill rate of powder is controlled to be within a range of 17-23%, and a welding wire with the diameter of phi1.6mm is manufactured. The flux core comprises the following raw materials: 1-3% of potassium or sodium fluoride, 3-6% of SiO2, 1-3% of one or two of rutile and zircon sand, 1-5% of one, two or three of strong deoxidizer magnesium powder, aluminite powder or aluminum and magnesium powder, 2-5% of one, two or three of strong deoxidizer titanium iron powder, silicon zirconiumpowder and zirconium iron powder and the balance iron powder. In addition, according to the intensity requirement of the welded steel plate and the low-temperature mechanical property requirement of a welding joint, in the flux core formula, a proper amount of alloying agent metal powder can be added, such as molybdenum iron powder, nickel powder and the like so as to obtain the alloy ingredient with a proper proportion. The flux-cored wire provided by the invention has the advantages that the flux-cored wire has good welding technology performance, less welding splash, beautiful welding lineshaping and good mechanical property of the welding joint.

Description

technical field [0001] The invention belongs to the technical field of high-efficiency high-energy-input welding, and in particular provides a gas-electric vertical welding gas-shielded flux-cored welding wire for high-energy-input welding. Background technique [0002] With the development of modern smelting technology, microalloying and controlled rolling and controlled cooling technology are adopted to control the shape of inclusions inside the steel, effectively solve the problem of embrittlement in the heat-affected zone of high-energy-input welding, and greatly improve the ability of steel plates to withstand high-input energy welding energy . Due to the development of high-energy-input welding technology, the cost of welding projects has been greatly reduced, and the application range of steel plates suitable for high-energy-input welding has become wider and wider. The gas-electric vertical welding flux-cored wire is combined with gas-slag protection to obtain a wel...

Claims

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Application Information

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IPC IPC(8): B23K35/368
Inventor 张飞虎鞠建斌牟淑坤陈延清郭占山董现春
Owner SHOUGANG CORPORATION
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