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Stainless steel wire with flux core for welding zinc coated steel sheets

A technology of stainless steel wire and stainless steel, which is applied in the direction of welding/cutting medium/material, welding medium, welding equipment, etc., and can solve problems such as preventing zinc embrittlement cracks from being unstable

Active Publication Date: 2009-07-15
NIPPON STEEL CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] However, zinc embrittlement cracks still frequently occur when using the above-mentioned flux-cored wires, i.e. the prevention of zinc embrittlement cracks is not constant, depending on the welding conditions

Method used

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  • Stainless steel wire with flux core for welding zinc coated steel sheets
  • Stainless steel wire with flux core for welding zinc coated steel sheets
  • Stainless steel wire with flux core for welding zinc coated steel sheets

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[0083] All concentrations are mass percent based on the total mass of the filament unless otherwise stated. Samples of flux-cored wire for welding zinc-based alloy-coated steel sheets had the compositions shown in Tables 2 and 3. Table 1 shows the chemical composition of the outer metal sheath of the austenitic-based stainless steel.

[0084] Table 1

[0085] symbol C Si mn P S Ni Cr Mo N O W1 0.018 0.41 1.60 0.022 0.002 10.3 18.6 0.04 0.02 0.006 W2 0.021 0.57 0.98 0.027 0.005 9.1 18.3 0.16 0.05 0.004 W3 0.004 0.04 0.35 0.025 0.001 9.5 18.0 0.50 0.03 0.005

[0086] Table 2

[0087] * Indicates the impurity level

[0088]

[0089] table 3

[0090] * Indicates the impurity level

[0091]

[0092] As for the properties of the deposited metal (plated metal), a tensile test was performed according to JIS Z 3323. The impact test was performed according to JIS Z 3111. In the inspection of welded join...

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Abstract

A stainless steel wire having a flux core for welding zinc-based alloy coated steel sheet having an outer metal sheath coating a core of flux wherein in total having in mass (%) as percentage to the total mass of the wire: C: 0.01- 0.05 %, Si: 0.1- 1.5 %, Mn: 0.5- 3.0 %, Ni: 7.0- 10.0 %, Cr: 26.0- 30.0 %, wherein an F value defined as a function of the above components ranges from 30 to 50, the flux further having a slag formation agent in mass (%) as percentage to the total mass of the wire: TiO2: 0.6- 2.6 %, SiO2: 1.8- 3.8%, ZrO2: 1.0- 3.5%, and optionally Al2O3: 0.1- 1.0%, wherein the slagformation agent in total is less than 10%, and the wire further containing Fe and residual impurities.

Description

[0001] This application claims priority from Japanese Application No. 2006-185171 and No. 2007-172124 filed on July 5, 2006 and June 29, 2007, respectively, the entire contents of which are hereby incorporated by reference. technical field [0002] The present invention relates to a wire with a flux core or flux core for zinc-based alloy coated (plated) steel sheets. The wire with a flux core provides a welded portion that is free from weld cracks and is excellent in corrosion resistance without post-treatment such as touch-up, and in ductility Performance and weldability are excellent. Background technique [0003] Due to the improved corrosion resistance of structural members, galvanized steel sheets are widely used in fields such as construction and automotive industries. Conventionally, in order to improve corrosion resistance, a method is employed in which uncoated steel members are welded and then coated by immersing the welded steel members in a zinc-based alloy bath...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/30B23K9/23B23K35/362
CPCB23K35/362C22C38/60B23K35/304C23C2/06C23C2/26C23C2/30C23C2/40
Inventor 水本学儿玉真二浅井谦一
Owner NIPPON STEEL CORP
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