Stainless steel flux-cored wire

Patent metadata

Field	Value
Publication number	US-10369666-B2
Application number	US-201213342461-A
Country	US
Kind code	B2
Filing date	Jan 3, 2012
Priority date	Mar 1, 2011
Publication date	Aug 6, 2019
Grant date	Aug 6, 2019

Abstract

It is an object to provide a stainless steel flux-cored wire in which the amount of hexavalent chromium in fume can be reduced while maintaining the weldability excellent. The stainless steel flux-cored wire contains, as percentage to the total mass of the wire: Cr: 11-30 mass %; metal Si, Si oxide and Si compound: 0.5-4.0 mass % in total in terms of Si [Si]; fluorine compound: 0.01-1.0 mass % in terms of F [F]; TiO 2 : 1.5 mass % or above; ZrO 2 +Al 2 O 3 : 3.2 mass % or below; Na compound, K compound and Li compound: 0.50 mass % or below in total of each of an amount in terms of Na [Na], an amount in terms of K [K] and an amount in terms of Li [Li]; and satisfies {([Na]+[K]+[Li])×[Cr] 2 }/([Si]+4.7×[F])≤10, where [Cr] represents Cr content.

First claim

What is claimed is:

1. A flux-cored wire for arc welding filled up with flux in an outer sheath made of stainless steel containing, as percentage to the total mass of the wire:
Cr: 11-30 mass %;
metal Si, Si oxide and Si compound: 1.1-4.0 mass % in total in terms of Si [Si];
fluorine compound: 0.01-1.0 mass % in terms of F [F];
TiO 2 : 1.5 mass % or above;
ZrO 2 +Al 2 O 3 : 3.2 mass % or below;
Na compound, K compound and Li compound: 0.50 mass % or below in total of each of an amount in terms of Na [Na], an amount in tell is of K [K] and an amount in terms of Li [Li]; wherein,

when [Cr] represents Cr content (mass %),
{([Na]+[K]+[Li])×[Cr] 2 }/([Si]+4.7×[F])≤10

is satisfied.

2. The flux-cored wire for arc welding filled up with flux in an outer sheath made of stainless steel according to claim 1 , wherein
{([Na]+[K]+[Li])×[Cr] 2 }/([Si]+4.7×[F])≤9.3

is satisfied.

3. The flux-cored wire for arc welding filled up with flux in an outer sheath made of stainless steel according to claim 1 , wherein
{([Na]+[K]+[Li])×[Cr] 2 }/([Si]+4.7×[F])≤9.1

is satisfied.

4. The flux-cored wire for arc welding filled up with flux in an outer sheath made of stainless steel according to claim 1 , wherein:
Cr: 11-24 mass %.

5. The flux-cored wire for arc welding filled up with flux in an outer sheath made of stainless steel according to claim 1 , wherein:
Cr: 11-22 mass %.

6. A flux-cored wire for arc welding filled up with flux in an outer sheath made of stainless steel containing, as percentage to the total mass of the wire:
Cr: 11-22 mass %;
metal Si, Si oxide and Si compound: 0.5-4.0 mass % in total in terms of Si [Si];
fluorine compound: 0.01-1.0 mass % in terms of F [F];
TiO 2 : 1.5 mass % or above;
ZrO 2 ÷Al 2 O 3: 3.2 mass % or below;
Na compound, K compound and Li compound: 0.50 mass % or below in total of each of an amount in terms of Na [Na], an amount in terms of K [K] and an amount in terms of Li [Li]; wherein, when [Cr] represents Cr content (mass %),
{([Na]+[K]+[Li])×[Cr] 2 }/([Si]+4.7×[F])≤10

is satisfied.

7. The flux-cored wire for arc welding filled up with flux in an outer sheath made of stainless steel according to claim 6 , wherein
{([Na]+[K]+[Li])×[Cr] 2 }/([Si]+4.7×[F])≤9.3
is satisfied.

8. The flux-cored wire for arc welding filled up with flux in an outer sheath made of stainless steel according to claim 6 , wherein
{([Na]+[K]+[Li])×[Cr] 2 }/([Si]+4.7×[F])≤9.1

is satisfied.

9. The flux-cored wire for arc welding filled up with flux in an outer sheath made of stainless steel according to claim 6 , wherein:
metal Si, Si oxide and Si compound: 1.0-4.0 mass % in total in terms of Si [Si].

Assignees

• Sugahara Hiroshi
• Ikeda Tetsunao
• Watanabe Hirohisa
• Kobe Steel Ltd

Inventors

• Sugahara Hiroshi
• Ikeda Tetsunao
• Watanabe Hirohisa

Classifications

• B23K35/3601

  with inorganic compounds as principal constituents · CPC title

• B23K35/362

  Selection of compositions of fluxes (B23K35/365, B23K35/368 take precedence) · CPC title

• B23K35/308

  with Cr as next major constituent · CPC title

• B23K35/0266 Primary

  flux-cored · CPC title