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Filler composition for high yield strength base metals

A composition and compound technology, applied in the direction of metal processing equipment, welding/cutting media/materials, welding equipment, etc., can solve problems such as failure to meet strength requirements

Inactive Publication Date: 2007-07-11
HOBART BROS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If cracks propagate through welding, the structures joined by such welding do not meet the desired strength requirements

Method used

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  • Filler composition for high yield strength base metals
  • Filler composition for high yield strength base metals
  • Filler composition for high yield strength base metals

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0025] The flux cored welding wire of the present invention comprises a metal sheath and a fluxing composition having preferably about 16% by weight filler. Other percentages are possible if preferred for a particular application using a different parent metal. A flux is characterized by a composition that results in a fine-grained morphology of acicular ferrite+bainite in the formed weld metal. The specific chemical and elemental compositions of the fluxing compositions of the welding wires of the present invention are shown in Table 1 of FIG. 3 .

[0026] The main function of Si in the fluxing composition is to deoxidize the weld pool during the soldering process. If oxygen is present during welding and remains in the resulting weld metal, it will cause porosity in the weld metal, which is an undesirable result. Si can also play a role in alternative reinforcement and increased hardness of the resulting weld. The present invention limits the concentration of Si in the wel...

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Abstract

A weld wire of the present invention comprises a steel sheath encapsulating a fluxed core having a combination of fluxing compounds and alloying elements. The fluxing compounds comprise up to 2%Wt of fluoride compounds and up to 49%Wt of oxide compounds. The alloying elements comprise Mn, Ni, Co, Ti and up to about 0.98%Wt of C. The amount of Co is sufficient to produce a ferrite-bainite weld metal morphology of a resulting weld. A yield strength of the resulting weld was measured from about 95 ksi to about 111 ksi.

Description

[0001] relevant paragraph [0002] This application claims priority from US Application No. 10 / 463,259, filed June 17, 2003, which is hereby incorporated by reference in its entirety. technical field [0003] The present invention relates to a method of preparing welds that meet the need for high yield strength. It is particularly concerned with Co-containing consumable flux-cored electrodes for controlling weld metal morphology during flux-cored arc welding. Background technique [0004] Flux-cored arc welding (FCAW) is a welding method in which heat is generated by an electric arc between a tubular electrode continuously entering a welding machine and a workpiece to be processed. Electrodes used in the FCAW process include a metal sheath and a compound, wherein the metal sheath surrounds a flux core and / or alloying elements. Typically, the arc and molten metal are shielded from the surrounding environment through the use of shielding gas. The chemical composition of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/02B23K9/173B23K35/30B23K35/36B23K35/362B23K35/38B23K35/40
CPCB23K35/3602B23K35/0266B23K9/173B23K35/3605B23K35/3073B23K35/406B23K35/362B23K35/22
Inventor 詹姆斯·基干
Owner HOBART BROS