Flux-cored arc welding material having remarkable impact resistance and abrasion resistance

Patent metadata

Field	Value
Publication number	US-10279436-B2
Application number	US-201415034326-A
Country	US
Kind code	B2
Filing date	Oct 2, 2014
Priority date	Dec 6, 2013
Publication date	May 7, 2019
Grant date	May 7, 2019

Abstract

Provided is a flux-cored arc welding material having remarkable impact resistance and abrasion resistance. The flux-cored arc welding material having remarkable impact resistance and abrasion resistance comprises: 0.1-0.75 wt % of C; 0.2-1.2 wt % of Si; 15-27 wt % of Mn; 2-7 wt % of Cr; 0.01 wt % or less of S; 0.018 wt % or less of P; 4.3-15 wt % of TiO2; 0.01-9 wt % of at least one selected from the group consisting of SiO2, ZrO2 and Al2O3; and the balance of Fe and other inevitable impurities. Further provided are a welding joint capable of all-position welding and having remarkable weldability, low temperature impact toughness and abrasion resistance, and thus a welding material very preferably applied to the manufacture of pipes used in the oil sand industry field and the like.

First claim

The invention claimed is:

1. A flux-cored arc welding material, the welding material comprising: by wt %, carbon (C): 0.1% to 0.75%, silicon (Si): 0.2% to 1.2%, manganese (Mn): 15% to 27%, chromium (Cr): 2% to 7%, sulfur (S): 0.01% or less, phosphorus (P): 0.018% or less, TiO 2 : 4.3% to 15%, at least one selected from the group consisting of SiO 2 , ZrO 2 , and Al 2 O 3 : 0.01% to 9%, and a balance of iron (Fe) and inevitable impurities, thereby being able to form a welding joint having an improved impact resistance and an improved abrasion resistance.

2. The flux-cored arc welding material of claim 1 , further comprising: nitrogen (N) in an amount of 0.5% or less.

3. The flux-cored arc welding material of claim 1 , further comprising: nickel (Ni) in an amount of 10% or less.

4. The flux-cored arc welding material of claim 1 , further comprising: at least one selected from the group consisting of vanadium (V): 5% or less, niobium (Nb): 5% or less, molybdenum (Mo): 7% or less, and tungsten (W): 6% or less.

5. The flux-cored arc welding material of claim 1 , further comprising: at least one selected from the group consisting of potassium (K), sodium (Na), and lithium (Li) in a total amount of 0.01% to 1.7%.

6. The flux-cored arc welding material of claim 1 , further comprising: at least one of fluorine (F) and calcium (Ca) in a total amount of 0.01% to 1.5%.

Assignees

• Posco

Inventors

• Lee Bong-Keun
• Han Il-Wook
• Kim Jeong-Kil
• Lee Sang-Chul
• Lee Dong-Ryeol
• Kim Geug

Classifications

• B23K35/362

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

• B23K35/361

  Alumina or aluminates · CPC title

• B23K35/0266

  flux-cored · CPC title

• C22C38/04

  containing manganese · CPC title

• B23K35/3607

  Silica or silicates · CPC title