Chromium-molybdenum-seel flux welding wire for gas shielded arc welding

A technology of gas shielded welding and flux-cored welding wire, which is used in welding medium, welding equipment, welding/cutting medium/material, etc., and can solve the problems of inability to meet the requirements of high-grade heat-resistant steel weld manufacturability and all-position welding performance requirements. , to achieve good arc stability, reduce oxidation and burning loss, and smooth the weld.

Inactive Publication Date: 2008-08-20
WUHAN TEMO WELDING CONSUMABLES CO LTD
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  • Abstract
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  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the defects and deficiencies in the prior art that cannot meet the manufacturability and all-position

Method used

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  • Chromium-molybdenum-seel flux welding wire for gas shielded arc welding
  • Chromium-molybdenum-seel flux welding wire for gas shielded arc welding
  • Chromium-molybdenum-seel flux welding wire for gas shielded arc welding

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Embodiment Construction

[0014] Below in conjunction with specific embodiment the present invention is described in further detail:

[0015] A chromium-molybdenum steel flux-cored welding wire for gas shielded welding, including a carbon steel sheath and a flux core, the composition mass % is 78-86% of the low-carbon steel sheath, and 14-22% flux core, and the composition and content of the flux core account for the total of the welding wire. The mass % is as follows: TiO 2 4-6, Si 0.2-0.5, Mn 1-2.2, SiO 2 0.1-1, ZrO 2 0.1-0.5, Cr 2-2.8, Mo 0.9-1.5, Ni 0-5, B 0.002-0.01, Ti0.02-0.3, Fe 2-6, Al+Mg 0.4-0.75, K, Na, Li alkali metal oxidation The content of K, Na and Li equivalent to fluoride and / or fluoride is 0.1-0.35, wherein K is 0.02-0.07, the sum of Na or Li or both is 0.08-0.3, and the equivalent of fluoride is F0.1-0.35. The carbon steel The sum of S, P, Sn and Bi in the outer skin and drug core powder is not greater than 0.035.

[0016] The steel sheath of the flux-cored welding wire of th...

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Abstract

The invention discloses a Cr-Mo steel flux-cored wire applying to gas shielded welding. The content proportion of the core wire accounting for the weight of the welding wire is as following: TiO2: 4 to 6%, Si: 0.2 to 0.5%, Mn: 1 to 2.2%, SiO2: 0.1 to 1%, ZrO2: 0.1 to 0.5%, Cr: 2 to 2.8%, Mo: 0.9 to 1.5%, Ni: 0 to 5%, B: 0.002 to 0.01%, Ti: 0.02 to 0.3%, Fe: 2 to 6%, Al+Mg: 0.4 to 0.75%, K, Na and Li: 0.1 to 0.35 which is converted from K, Na and Li alkali oxide and/or fluoride, wherein k: 0.02 to 0.07%, Na/Li/ Na+Li: 0.08 to 0.3%, F: 0.1 to 0.35% converted from fluoride. The proportion of S, P, Sn and Bi is less than 0.035% in the carbon steel and the core wire powders. The welding wire has the advantages that: the intensity and heat-resistant of the weld joint can be insured, at same time, the invention still has good low-temperature impact toughness and global welding performance; the stability of the electric arc and the welding operation processing property are both good; the weld joint is smooth; the weld joint metal is of good low-temperature impact toughness and crack resistance; the invention is suitable for welding heat-resistant steel such as the 2.25-Cr-1-Mo steel.

Description

technical field [0001] The invention relates to a welding material for metal welding, in particular to a chromium-molybdenum steel flux-cored welding wire for gas shielded welding. It is suitable for welding heat-resistant steel such as 2.25 chromium 1 molybdenum steel with Ar+CO2 mixed gas. Background technique [0002] Gas-shielded flux-cored wire welding is compatible with the advantages of manual electrodes and gas-shielded welding solid wire welding, with high production efficiency and good welding process performance. It has been widely used in the welding of carbon steel, low-alloy steel and high-alloy steel. However, when welding heat-resistant steel, especially 2.25Cr1Mo heat-resistant steel, the commonly used titanium-type flux-cored wire still has the defect of low low-temperature impact toughness. Crack resistance also needs to be improved. [0003] Chinese patent publication number: CN 101041214A, publication date: September 26, 2007, the title of the inventio...

Claims

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Application Information

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IPC IPC(8): B23K35/36
Inventor 杜晓琪卢济培刘玉双
Owner WUHAN TEMO WELDING CONSUMABLES CO LTD
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