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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 5171958 B1

PDFFull Text
Date of Patent:
Dec. 15, 1992

Filed:

Aug. 13, 1991

High-efficiency fillet welding method for steel plate

Applicant:
Inventors:

Tadamasa Yamaguchi, Chiba, JP;

Yoshimitsu Meguro, Tokyo, JP;

Saburo Hayashi, Tokyo, JP;

Matsushige Nakajima, Kagawa, JP;

Assignee:

Kawasaki Steel Corporation, , JP;

Attorney:

Miller; Austin R.

Primary Examiner:

Clifford C Shaw

Int. Cl.
CPC ...
B23K / ;
U.S. Cl.
CPC ...
219 73 ; 2191 / ;
Abstract

A high-efficiency fillet welding method for conducting, without edge preparation, T-shape fillet welding of thick steel webs having a C content not more than 0.21 wt %. The welding is conducted by using a leading electrode (L) and a trailing electrode (T) composed of wires of about 4.8 to 6.4 mm diameter and containing C in an amount which meets the condition of formula (1), as well as 1.50 to 2.50 wt % of Mn. The welding is executed in such a manner that the ratio I.sub.T /I.sub.L of the current I.sub.T supplied to the trailing electrode (T) to the current I.sub.L supplied to the leading electrode (L) ranges from 0.75 to 1.00. The flux used in the welding is a bonded flux containing 60 to 91 wt % in total of SiO.sub.2, MgO and CaO, 5 to 30 wt % in total of TiO.sub.2, Al.sub.2 O.sub.3 and CaF.sub.2, 2 to 8 wt % of metal powder, said flux containing a carbonate gas-forming component in an amount to generate 2 to 10 wt % of gases by thermal decomposition of said carbonate during welding, and the balance incidental impurities, the flux having a bulk specific gravity of 0.80 to 1.20 g/cm.sup.3 :

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Yamaguchi, Tadamasa. (1992). High-efficiency fillet welding method for steel plate (U.S. Patent No. 5171958). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5171958

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