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Low dust-raising rate fluorine-free metal-core steel welding wire

A metal core and structural steel technology, applied in the field of welding, can solve the problems of high dust generation rate, high toxicity, low dust generation rate, etc., and achieve the effect of minimal slag, easy slag removal, and stable arc

Inactive Publication Date: 2006-07-19
BEIJING UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] What the present invention aims to solve is the problem of high dust generation rate and high toxicity in the traditional structural steel powder cored welding wire, and provides a low dust generation rate and fluorine-free low-smoke structural steel metal cored welding wire

Method used

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  • Low dust-raising rate fluorine-free metal-core steel welding wire

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0027] The welding wires of all the examples are made by the "FCWM50 passive drawing type flux-cored welding wire machine" manufactured by Kunming Heavy Machinery Factory:

[0028] 1. Select 10×0.3 (width 10mm, thickness 0.3mm) SPCC cold-rolled steel strip. Roll it into a U shape first.

[0029] Get 20 grams of ferrotitanium, 80 grams of ferromanganese, 100 grams of ferrosilicon, 10 grams of aluminum, 200 grams of feldspar, 30 grams of zircon, 5 grams of alumina, 30 grams of magnesia, 525 grams of iron powder, 1000 grams ( The particle size of the powder taken is that it can pass through an 80-mesh sieve). The various powders taken were put into a powder mixer and mixed for 10 minutes, and then the mixed powders were added into a U-shaped SPCC cold-rolled steel strip groove, and the filling rate was 16%. Close the U-shaped groove so that the powder is wrapped in it. Then make it pass through drawing dies with diameters of 2.95mm, 2.7mm, 2.4mm, 2.2mm, 1.9mm, 1.8mm, 1.5mm, 1....

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Abstract

The invention provides a fluorine-free low-smoke soldering wire with metal core structure steel, wherein the metal core comprises the following substances (by mass percent): 2-6% ferrotitanium, 1-8% ferromanganese, 2-12% silicoferrite, 1-1.5% aluminium, 2-20% falspar, 1-3% zircon, 0.5-2.5% aluminum oxide, 0.5-3% magnesite, and 54-81% ferrous powder.

Description

technical field [0001] The invention belongs to the field of welding in material processing engineering, and the invention is mainly applied to the welding of ordinary steel structures, building steel structures, ship hulls and the like. Background technique [0002] Welder pneumoconiosis caused by welding fume accounts for about a quarter of the entire occupational disease field, and the fume that causes pneumoconiosis comes directly from welding materials. During the welding process, under the action of the welding arc, the welding material and the base metal, the liquid metal and the substance after the complex welding metallurgical reaction evaporate and condense to form smoke and dust that diffuses in the welding work area. Metal oxides in the smoke such as manganese oxide, Hexavalent chromium, potassium, and sodium oxides are inhaled by workers, causing severe irritation to the respiratory tract and lung mucous membranes; smoke and dust with particle sizes within the r...

Claims

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Application Information

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IPC IPC(8): B23K35/30
Inventor 蒋建敏李现兵贺定勇董娜
Owner BEIJING UNIV OF TECH