Low manganese welding electrodes

Patent metadata

Field	Value
Publication number	US-2016236302-A1
Application number	US-201615017574-A
Country	US
Kind code	A1
Filing date	Feb 5, 2016
Priority date	Feb 18, 2015
Publication date	Aug 18, 2016
Grant date	—

Abstract

Flux cored welding electrodes comprise a iron based metal sheath and either a flux or metal core within the sheath, enclosing core ingredients. The core ingredients and sheath together comprise, in weight percentages based on the total weight of the electrode, very low levels of manganese. While having low levels of manganese the electrodes satisfy the strength and safety requirements required of commercial electrodes. Embodiments contain manganese in the range of 0.09 to 0.19% by weight of the electrode, along with other components.

First claim

We claim:

1 . A flux cored electrode, comprising:
an iron based metal sheath; and a titanium dioxide based flux core, which is surrounded by said iron based metal sheath; wherein said electrode further comprises, by weight of the electrode:
manganese in the range of 0.09 to 0.19%;
boron in the range of 0.003 to 0.014%;
carbon in the range of 0.04 to 0.12%;
silicon in the range of 0.3 to 0.8%;
molybdenum in the range of 0 to 0.4%;
titanium in the range of 0.15 to 0.42%; and
aluminum in the range of 0.06 to 0.3%.

2 . The flux cored electrode of claim 1 , wherein said manganese is in the range of 0.11 to 0.17% by weight.

3 . The flux cored electrode of claim 1 , wherein said manganese is in the range of 0.14 to 0.16% by weight.

4 . The flux cored electrode of claim 1 , wherein said titanium dioxide is in the range of 30 to 45% by weight of said flux core.

5 . The flux cored electrode of claim 1 , wherein said titanium dioxide is in the range of 35 to 40% by weight of said flux core.

6 . The flux cored electrode of claim 1 , wherein:
said boron is in the range of 0.005 to 0.012%; said carbon is in the range of 0.05 to 0.11%; said silicon is in the range of 0.4 to 0.6%; said molybdenum is in the range of 0 to 0.4%; said titanium is in the range of 0.19 to 0.38%; and said aluminum is in the range of 0.10 to 0.23%.

7 . The flux cored electrode of claim 1 , wherein said sheath is in the range of 80 to 88% of the weight of said cored electrode.

8 . A flux cored electrode, comprising:
an iron based metal sheath; and a calcium fluoride based flux core, which is surrounded by said iron based metal sheath; wherein said electrode further comprises, by weight of the electrode:
manganese in the range of 0.09 to 0.19%;
carbon in the range of 0.05 to 0.11%;
silicon in the range of 0.5 to 1.1%;
titanium in the range of 0.02 to 0.03%; and
aluminum in the range of 0.06 to 0.16%.

9 . The flux cored electrode of claim 8 , wherein said manganese is in the range of 0.12 to 0.16% by weight.

10 . The flux cored electrode of claim 8 , wherein said manganese is in the range of 0.13 to 0.15% by weight.

11 . The flux cored electrode of claim 8 , wherein said calcium fluoride is in the range of 19 to 30% by weight of said flux core.

12 . The flux cored electrode of claim 8 , wherein said calcium fluoride is in the range of 20 to 28% by weight of said flux core.

13 . The flux cored electrode of claim 8 , wherein:
said carbon is in the range of 0.05 to 0.11%; said silicon is in the range of 0.58 to 1.12%; said titanium is in the range of 0.02 to 0.03%; and said aluminum is in the range of 0.07 to 0.15%.

14 . The flux cored electrode of claim 8 , wherein said sheath is in the range of 70 to 80% of the weight of said cored electrode.

15 . The flux cored electrode of claim 8 , wherein none of zirconium dioxide, boron or magnesium are intentionally present in said flux cored electrode.

16 . A metal cored electrode, comprising:
an iron based metal sheath; and an iron based core, which is surrounded by said iron based metal sheath; wherein said electrode further comprises, by weight of the electrode:
manganese in the range of 0.09 to 0.19%;
carbon in the range of 0.06 to 0.15%;
silicon in the range of 0.4 to 1.1%;
titanium in the range of 0.03 to 0.14%; and
aluminum in the range of 0.06 to 0.18%.

17 . The metal cored electrode of claim 16 , wherein said manganese is in the range of 0.12 to 0.18% by weight.

18 . The metal cored electrode of claim 16 , wherein said manganese is in the range of 0.14 to 0.16% by weight.

19 . The metal cored electrode of claim 16 , wherein said iron based core comprises nickel in the range of 1.7 to 2.3% by weight of said iron based core.

20 . The metal cored electrode of claim 16 , wherein:
said carbon is in the range of 0.07 to 0.15%; said silicon is in the range of 0.4 to 1%; said titanium is in the range of 0.04 to 0.11%; and said aluminum is in the range of 0.06 to 0.16%.

21 . The metal cored electrode of claim 16 , wherein said sheath is in the range of 74 to 84% of the weight of said cored electrode.

22 . The metal cored electrode of claim 16 , wherein none of silicon dioxide, zirconium dioxide, titanium dioxide, potassium oxide, calcium fluoride, boron or magnesium are intentionally present in said metal cored electrode.

Assignees

• Lincoln Global Inc

Inventors

• Ogborn Jonathan
• Langham Daniel
• Panday Radhika

Classifications

• B23K35/22

  characterised by the composition or nature of the material · CPC title

• B23K35/30

  with the principal constituent melting at less than 1550°C · CPC title

• B23K35/3053 Primary

  Fe as the principal constituent · CPC title