Special self-protection flux-cored wire for resurfacing rail

A flux-cored welding wire and rail welding repair technology, applied in the direction of rails, rails, welding media, etc., can solve the problems of high price and complex components, and achieve the effects of high production efficiency, small spatter, and easy operation by welders

Inactive Publication Date: 2010-12-15
TIANJIN YONGCHANG WELDING WIRES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, such welding materials are complicated in composition and expensive

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A special self-shielding flux-cored welding wire for rail welding repair, using ordinary commercially available SPCC-SD cold-rolled low-carbon steel strips as raw materials, and adopting conventional flux-cored transition alloy methods, general powder specifications and flux-cored wire production processes. The weight percentage formula of welding wire flux core is calcium carbonate CaCO 3 34%, calcium fluoride CaF 2 13%, barium fluoride BaF 2 15%, aluminum oxide Al 2 o 3 4%, 12% aluminum-magnesium alloy with a mass percentage of 1:1, 4% iron powder, 5% high-carbon ferromanganese, 8% metallic nickel, 3% metallic chromium, and 2% metallic molybdenum. The special self-shielding flux-cored welding wire for rail welding made by this formula is tested by the mechanical properties of the deposited metal: Rm835 ​​(N / mm2), Rel / Rp0.2 715 (N / mm2), A13%, KU2 normal temperature 70J , 65J, 67J, Brinell hardness (HB) 315, 324, 320. The practice of using the welding wire for r...

Embodiment 2

[0017] A special self-shielding flux-cored welding wire for rail welding repair, which is made of ordinary commercially available SPCC-SD cold-rolled low-carbon steel strip as raw material, and is manufactured by conventional flux-cored transition alloy method, general powder specifications and flux-cored wire production process. The weight percentage formula of welding wire flux core is calcium carbonate CaCO 3 36%, calcium fluoride CaF 2 12%, barium fluoride BaF 2 14%, aluminum oxide Al 2 o 3 4%, 10% aluminum-magnesium alloy with a mass percentage of 1:1, 3% iron powder, 6% high-carbon ferromanganese, 9% metallic nickel, 4% metallic chromium, and 2% metallic molybdenum. The special self-shielding flux-cored welding wire for rail welding made by this formula is tested by the mechanical properties of the deposited metal: Rm890 (N / mm2), Rel / Rp0.2 755 (N / mm2), A8%, KU2 normal temperature 54J , 63J, 58J, Brinell hardness (HB) 356, 364, 348. The practice of using the weldi...

Embodiment 3

[0019] A special self-shielding flux-cored welding wire for rail welding repair, which is made of ordinary commercially available SPCC-SD cold-rolled low-carbon steel strip as raw material, and is manufactured by conventional flux-cored transition alloy method, general powder specifications and flux-cored wire production process. The weight percentage formula of welding wire flux core is calcium carbonate CaCO 3 32%, calcium fluoride CaF 2 14%, barium fluoride BaF 2 16%, aluminum oxide Al 2 o 3 4%, 12% aluminum-magnesium alloy with a mass percentage of 1:1, 3% iron powder, 5% high-carbon ferromanganese, 9% metallic nickel, 3% metallic chromium, and 2% metallic molybdenum. The special self-shielding flux-cored welding wire for rail welding made by this formula is tested by the mechanical properties of the deposited metal: Rm865 (N / mm2), Rel / Rp0.2 735 (N / mm2), A17%, KU2 normal temperature 93J , 90J, 95J, Brinell hardness (HB) 329, 331, 325. The practice of using the weld...

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PUM

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Abstract

The invention relates to a special self-protection flux-cored wire for resurfacing a rail, which is manufactured by using cold-rolled low-carbon steel strip as a raw material and adopting a conventional flux-cored transition alloy mode , a universal powder specification and a flux-cored wire production process. The flux-cored wire comprises the following components of 12-15 percent of calcium fluoride, 10-20 percent of barium fluoride, 4-5 percent of aluminium oxide, 10-20 percent of aluminium magnesium alloy, 3-5 percent of iron powder, 5-6 percent of high carbon ferromanganese, 8-10 percent of metallic nickel, 3-5 percent of chrome, 1-3 percent of molybdenum and the balance of calcium carbonate. The flux-cored wire is used for semi-automatic welding or fully-automatic welding, can be continuously conveyed without gas shielding, and has the advantages of strong wind resistance, low cost, good welding quality, easy operation, excellent process and mechanical properties, stable electric arc, small sputtering and attractive formation.

Description

(1) Technical field: [0001] The invention belongs to the field of welding materials, in particular to a self-shielding flux-cored welding wire for rail welding repair. (two) background technology: [0002] With the rapid development of my country's railway construction, the demand for rails is also increasing rapidly, and the contradiction between supply and demand will become increasingly prominent. Therefore, rational use of old rails and prolonging the service life of rails not only has great technical and economic value, but also has a positive impact on improving line quality and operating safety. [0003] The purpose of the research and development of automatic welding repair is to use the development of current science and technology under the new situation to realize the automation of the welding repair process with new programmable control and computer technology, and to achieve the goal of eliminating the influence of human factors in the operation. The quality of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/24B23K35/36B23K9/00B23K101/26
Inventor 侯杰昌
Owner TIANJIN YONGCHANG WELDING WIRES
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