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Metal powder-cored flux-cored wire for welding chrome-molybdenum steel and its preparation and application

A technology of flux-cored welding wire and metal powder core, applied in welding equipment, metal processing equipment, welding media, etc., can solve the problems of poor impact toughness and crack resistance, achieve good cold crack resistance, improve room temperature impact toughness, and weld Good sewing effect

Active Publication Date: 2014-10-01
WUHAN TEMO WELDING CONSUMABLES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to solve the problem of poor impact toughness and crack resistance of the commonly used titanium-type flux-cored welding wire for welding chromium-molybdenum steel (such as 1.25Cr0.5Mo steel)

Method used

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  • Metal powder-cored flux-cored wire for welding chrome-molybdenum steel and its preparation and application
  • Metal powder-cored flux-cored wire for welding chrome-molybdenum steel and its preparation and application
  • Metal powder-cored flux-cored wire for welding chrome-molybdenum steel and its preparation and application

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Embodiment Construction

[0030] The present invention will be further described below in conjunction with specific examples, so that those skilled in the art can better understand the present invention and implement it, but the given examples are not intended to limit the present invention.

[0031] The metal powder-cored flux-cored welding wire for welding chromium-molybdenum steel of the present invention includes a carbon steel sheath and powder filled in the carbon steel sheath, wherein the medicine powder contains the following components and their percentages of the total weight of the welding wire (medicine powder + carbon steel sheath) The percentages are as follows: TiO 2 0.02~1%;Al 2 o 3 0.02~1.2%; Si 0.6~0.9%; Mn 0.5~1.8%; Cr 0.90~2.4%; NaF or CaF 2 One or its arbitrary ratio mixture 0.3~1%; Mg or Al one or its arbitrary ratio mixture 0.02~0.5%; Mo 0.5~2.5%; Ni 0~0.36%.

[0032] The weight of the powder is 14-20% of the total weight of the welding wire, and the balance is Fe.

[0033...

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Abstract

The invention discloses a metal powder-cored flux-cored welding wire for welding chrome-molybdenum steel, which comprises a carbon steel sheath and powder filled in the carbon steel sheath, and the composition mass % is 80-86 of the low-carbon steel sheath and 14-20 of the flux core , characterized in that: the powder contains the following components and their percentages in the total weight of the flux cored wire are: TiO20.02~1%; Al2O30.02~1.2%; Si0.6~0.9%; Mn0.5~ 1.8%; Cr0.90~2.4%; NaF or CaF2 or its mixture in any ratio 0.3~1%; Mg or Al or its mixture in any ratio 0.02~0.5%; Mo0.5~2.5%. When the welding wire is used for welding, the amount of slag on the surface of the weld is small, the deposition efficiency is high, the spatter is small, the smoke is small, the weld shape is good, and the welding efficiency is high. The weld has good impact toughness and crack resistance.

Description

technical field [0001] The invention relates to a welding material for metal welding, specifically a kind of argon-rich (80%Ar+20%CO 2 ) Metal powder cored flux cored wire for gas shielded welding of chromium molybdenum steel (such as 1.25Cr 0.5Mo steel) and its preparation. Background technique [0002] Flux-cored wire is a high-efficiency welding material, which has many advantages such as high welding efficiency, shortened welding cycle, good welding process performance, beautiful weld shape, easy adjustment of composition, and small welding deformation. Therefore, it is used in the welding of steel structures such as ships and bridges. be widely used. However, in the field of heat-resistant steel, the commonly used titanium-type flux-cored wire still has the problems of poor impact toughness and crack resistance. Contents of the invention [0003] The technical problem to be solved by the invention is to solve the problem that the titanium-type flux-cored welding wir...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/368B23K35/30B23K35/40
Inventor 田海成刘玉双韩海峰李磊张亚平
Owner WUHAN TEMO WELDING CONSUMABLES CO LTD
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