High manganese steel pipe with step-out weld zone erosion-corrosion resistance and method of making the same

Patent metadata

Field	Value
Publication number	US-10493570-B2
Application number	US-201715584860-A
Country	US
Kind code	B2
Filing date	May 2, 2017
Priority date	May 2, 2016
Publication date	Dec 3, 2019
Grant date	Dec 3, 2019

Abstract

Improved steel welds, article for making the same, and methods of making the same are provided. The present disclosure provides advantageous erosion, corrosion and/or cracking resistant weld metal. More particularly, the present disclosure provides high manganese (Mn) weld metal compositions having enhanced erosion, corrosion and/or cracking resistance, articles for the production of the high manganese weld metal compositions having enhanced erosion, corrosion, and/or cracking resistance, and methods for fabricating high manganese weld metal compositions having enhanced erosion, corrosion and/or cracking resistance.

First claim

The invention claimed is:

1. A welding composition comprising:
carbon in a range of about 0.3 wt. % to about 1.2 wt. %;
silicon in a range of about 0.1 wt. % to about 3.0 wt. %;
manganese in a range of about 9.0 wt. % to about 30 wt. %; and
chromium in an amount less than or equal to about 8 wt. %;
nickel in an amount less than or equal to about 6 wt. %;
molybdenum in an amount less than or equal to about 6 wt. %;
tungsten in an amount less than or equal to about 5 wt. %;
copper in an amount less than or equal to about 4 wt. %;
niobium in an amount less than or equal to about 2 wt. %;
vanadium in an amount less than or equal to about 2 wt. %;
titanium in an amount of about 0.2 wt. % to about 2 wt. %;
nitrogen in an amount less than or equal to about 0.4 wt. %;
boron in an amount less than or equal to about 1 wt. %;
at least one of:
i. sulfur in an amount of less than or equal to about 0.3 wt. %;
ii. phosphorous in an amount of less than or equal to about 0.03 wt %; or
iii. a combination thereof; and the balance with iron.

2. The composition of claim 1 , wherein at least one of:
the chromium is in a range of about 2 to about 6 wt. %;
the nickel is in a range of about 0 to about 5 wt. %;
the molybdenum is in a range of about 0.5 to about 3 wt. %;
the tungsten is in a range of about 0.1 to about 2 wt. %;
the copper is an amount less than about 2 wt. %;
the niobium is an amount less than about 1 wt. %;
the vanadium is an amount less than about 1 weight %;
the titanium is an amount of about 0.2 wt. % about 1 wt. %;
the nitrogen is in a range of about 0.01 to about 0.3 wt. %;
the boron is in a range of about 0.01 to about 0.4 wt. %;
or a combination thereof.

3. The welding composition of claim 1 , wherein at least one of:
the carbon is in a range of about 0.45 to about 0.7 wt. %;
the silicon is in a range of about 0.2 to about 1.5 wt. %;
the manganese is in a range of about 12 to about 20 wt. %;
or a combination thereof.

4. The welding composition of claim 2 , wherein at least one of:
the carbon is in a range of about 0.45 to about 0.7 wt. %;
the silicon is in a range of about 0.2 to about 1.5 wt. %;
the manganese is in a range of about 12 to about 20 wt. %;
or a combination thereof.

5. The welding composition of claim 1 , wherein the welding composition is predominantly austenite phase.

6. The welding composition of claim 1 , wherein the welding composition provides a range of yield strength levels ranging from about 60 ksi to about 130 ksi in an as-deposited condition without cold deformation.

7. The welding composition of claim 1 , wherein the welding composition further comprises second phase particles selected of the group consisting of carbide, nitride, borides, oxides, and combinations thereof.

Assignees

• Exxonmobil Res & Eng Co
• Posco

Inventors

• Jin Hyunwoo
• Ma Ning
• Ozekcin Adnan
• Wasson Andrew J
• Fairchild Douglas P
• Han IlWook
• Lee Sangchul
• Lee Bongkeun
• Lee Jongsub

Classifications

• C22C38/26

  with niobium or tantalum · CPC title

• B23K35/0261

  Rods, electrodes or wires · CPC title

• B23K35/3073 Primary

  with Mn as next major constituent · CPC title

• C22C38/58

  with more than 1.5% by weight of manganese · CPC title

• C22C38/44

  with molybdenum or tungsten · CPC title