Exxonmobil Research and Engineering Company

Exxonmobil Upstream Research Company

Posco

Posco Co., Ltd

Poseo

Jfe Steel Corporation

Exxonmobil Technology and Engineering Company

Douglas Paul Fairchild

Raghavan Ayer

Hyunwoo Jin

Andrew J Wasson

Jongsub Lee

Bongkeun Lee

Sangchul Lee

Steven Jeffrey Ford

Adnan Ozekcin

Ning Ma

Hyun-Woo Jin

Neeraj Srinivas Thirumalai

Daniel B Lillig

IlWook Han

Narasimha-Rao Venkata Bangaru

Jayoung Koo

Mario Luis Macia

Xin Yue

Timothy D Anderson

Danny Lee Beeson

IIWook Han

Nathan Eugene Nissley

Nathan E Nissley

Mario L Macia

Iiwook Han

Shigeru Endo

Mitsuhiro Okatsu

Amit Kumar

Ronald R Bowen

James Ronald Rigby

Glen A Vaughn

Moriyasu Nagae

Shinichi Kakihara

Robert M Woodall

James B LeBleu, Jr

Douglas S Hoyt

Mark Biegler

Ali M Farah

Nicholas E Biery

Narasimha V Bangaru

Danny L Beeson

Welding compositions for high manganese steel base metals, the composition comprising: carbon in a range of about 0.4 wt % to about 0.8 wt %; manganese in a range of about 18 wt % to about 24 wt %; chromium in an amount of about 6 wt %; molybdenum in an amount of about <4 wt %; nickel in an amount of about <5 wt %; silicon in an amount of about 0.4 wt % to about 1.0 wt %; sulfur in an amount of about <200 ppm; phosphorus in an amount of about <200 ppm; and the balance comprising iron.

Field girth welding technology for high manganese steel slurry pipelines

Methods of welding high manganese steel, the methods comprising: supplying at least one piece of high manganese steel; supplying the metal cored wire comprising a steel sheath with a core comprising powders of certain metal and carbon percentages and at least one of: i: sulfur in an amount less than 0.3 wt. %; or ii. phosphorous in an amount less than 0.03 wt. %; or a combination thereof; and the balance with iron; submerging the at least one piece of high manganese steel in a slag and arc stabilizer; and applying a current to the metal cored wire to produce a liquid alloy steel composition on the at least one piece of high manganese steel.

Methods of welding high manganese steel with step-out weld zone erosion-corrosion resistance

A metal cored wire for submerged arc welding, the wire comprising a steel sheath with a core comprising powders of: 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. %; chromium in an amount less than about 8 wt. %; nickel in an amount less than about 6 wt. %; molybdenum in an amount less than about 6 wt. %; tungsten in an amount less than about 5 wt. %; copper in an amount less than about 4 wt. %; niobium in an amount less than about 2 wt. %; vanadium in an amount less than about 2 wt. %; titanium in an amount less than about 2 wt. %; nitrogen in an amount less than about 0.4 wt. %; boron in an amount less than about 1 wt. %; at least one of: (i) sulfur in an amount less than about 0.3 wt. %; (ii) phosphorous in an amount less than about 0.03 wt. %; or a combination thereof; and the balance with iron.

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

The present disclosure relates to a welding composition for joining high manganese steel base metals to low carbon steel base metals, as well as systems and methods for the same. The composition includes: carbon in a range of about 0.1 wt % to about 0.4 wt %; manganese in a range of about 15 wt % to about 25 wt %; chromium in a range of about 2.0 wt % to about 8.0 wt %; molybdenum in an amount of &#x2264; about 2.0 wt %; nickel in an amount of &#x2264; about 10 wt %; silicon in an amount of &#x2264; about 0.7 wt %; sulfur in an amount of &#x2264; about 100 ppm; phosphorus in an amount of &#x2264; about 200 ppm; and a balance comprising iron. In an embodiment, the composition has an austenitic microstructure.

Field dissimilar metal welding technology for enhanced wear resistant high manganese steel

The present disclosure relates to a welding composition for joining high manganese steel base metals and methods of applying the same. The composition includes: carbon in a range of about 0.4 wt % to about 0.8 wt %; manganese in a range of about 18 wt % to about 24 wt %; chromium in an amount of &#x2264; about 6 wt %; molybdenum in an amount of &#x2264; about 4 wt %; nickel in an amount of &#x2264; about 5 wt %; silicon in an amount of about 0.4 wt % to about 1.0 wt %; sulfur in an amount of &#x2264; about 200 ppm; phosphorus in an amount of &#x2264; about 200 ppm; and a balance including iron. In an embodiment, the composition has an austenitic phase.

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.

A steel composition and method from making a dual phase steel therefrom. The dual phase steel may have carbon of about 0.05% by weight to about 0.12 wt %; niobium of about 0.005 wt % to about 0.03 wt %; titanium of about 0.005 wt % to about 0.02 wt %; nitrogen of about 0.001 wt % to about 0.01 wt %; silicon of about 0.01 wt % to about 0.5 wt %; manganese of about 0.5 wt % to about 2.0 wt %; and a total of molybdenum, chromium, vanadium and copper less than about 0.15 wt %. The steel may have a first phase consisting of ferrite and a second phase having one or more of carbide, pearlite, martensite, lower bainite, granular bainite, upper bainite, and degenerate upper bainite. A solute carbon content in the first phase may be about 0.01 wt % or less.

Low yield ratio dual phase steel linepipe with superior strain aging resistance

Weld metals and methods for welding ferritic steels are provided. The weld metals have high strength and high ductile tearing resistance and are suitable for use in strain based pipelines. The weld metal contains retained austenite and has a cellular microstructure with cell walls containing lath martensite and cell interiors containing degenerate upper bainite. The weld metals are comprised of between 0.02 and 0.12 wt % carbon, between 7.50 and 14.50 wt % nickel, not greater than about 1.00 wt % manganese, not greater than about 0.30 wt % silicon, not greater than about 150 ppm oxygen, not greater than about 100 ppm sulfur, not greater than about 75 ppm phosphorus, and the balance essentially iron. Other elements may be added to enhance the properties of the weld metal. The weld metals are applied using a power source with current waveform control which produces a smooth, controlled welding arc and weld pool in the absence of COor oxygen in the shielding gas.

High toughness weld metals with superior ductile tearing resistance

Provided are strain hardened high strength nickel based alloy welds that yield improved properties and performance in joining high strength metals. The advantageous weldments include two or more segments of ferrous or non-ferrous components, and fusion welds, friction stir welds, electron beam welds, laser beam welds, or a combination thereof bonding adjacent segments of the components together, wherein the welds comprise a strain hardened nickel based alloy weld metal composition including greater than or equal to 10 wt % Mo based on the total weight of the nickel based alloy weld metal composition. Also provided are methods for forming the welds from the nickel based alloy weld compositions. The strain hardened high strength nickel based alloy welds are useful in the oil, gas and petrochemical industry in applications for natural gas transportation and storage, oil and gas well completion and production, and oil and gas refinery and chemical plants.

High strength nickel alloy welds through strain hardening

Provided are precipitation hardened high strength nickel based alloy welds that yield improved properties and performance in joining high strength metals. The advantageous weldments include two or more segments of ferrous or non-ferrous components, and fusion welds, friction stir welds, electron beam welds, laser beam welds, or a combination thereof bonding adjacent segments of the components together, wherein the welds comprise a precipitation hardened nickel based alloy weld metal composition including greater than or equal to 1.4 wt % of combined aluminum and titanium based on the total weight of the nickel based alloy weld metal composition. Also provided are methods for forming the welds from the nickel based alloy weld compositions, wherein the precipitation hardening occurs in the as-welded condition. The nickel based welds do not require a separate heat treatment step after welding to produce advantageous strength properties.

High strength nickel alloy welds through precipitation hardening

Provided are metal structures and methods of forming such structures for use in oil, gas and/or petrochemical applications that are joined with non-ferrous weld metal compositions or a high alloy weld metal compositions. The welded metal structures include two or more segments of ferrous or non-ferrous components, and fusion welds, friction stir welds or a combination thereof bonding adjacent segments of the components together, wherein the welds comprise a non-ferrous weld metal composition or a high alloy weld metal composition that is substantially different from the metal composition of the two or more components. The resultant welded structures exhibit improvements in fatigue resistance, toughness, strain capacity, strength, stress corrosion cracking resistance, and hydrogen embrittlement resistance compared to traditional iron-based weld compositions. The structures and methods of forming such structures are advantageous in joining metal components in applications for natural gas transportation and storage, oil and gas well completion and production, and oil and gas refinery and chemical plants.

Weld metal compositions for joining steel structures in the oil and gas industry

A method for welding and repairing cracks in metal parts is provided by subjecting the metal parts to be welded to friction stir welding and the cracks to be repaired to friction stir processing under conditions sufficient to provide a weld joint or crack repair having a preselected property or set of properties based upon the intended use of the weldment. The FSW and FSP methods are advantageous in joining and repairing metal structures and components in applications for natural gas transportation and storage, oil and gas well completion and production, and oil and gas refinery and chemical plants.

Application of high integrity welding and repair of metal components in oil and gas exploration, production and refining

Provided are butt welds and methods of making such butt welds using a combination of fusion root welding and friction stir welding to yield welds with decreased propensity for dropout during friction stir welding without the need for a back-up support plate. In one form of the present disclosure, the butt weld includes: two or more abutting structural steel components beveled on faying surfaces on one side of the components to form a suitably shaped fusion root weld groove and unbeveled on faying surfaces on the opposite side of the components and interconnected with a first fusion root weld on the beveled side of the components and a second friction stir weld on the unbeveled side of the components, wherein the first fusion root weld has a width ranging from 7 mm to 30 mm, a penetration depth ranging from 2 mm to 20 mm, and an overfill ranging from 2 mm to 5 mm, and wherein the stir zone of the second friction stir weld penetrates the first fusion root weld. The butt welds and methods of making find application in joining linepipe for oil and gas production.

Butt weld and method of making using fusion and friction stir welding

Methods of welding two pieces of metal to produce a weld joint having excellent fracture toughness are provided. Two pieces of metal are positioned for welding so as to form a narrow weld groove having two sidewalls with bevel angles of less than about 10&#xb0;. Two or more layers are applied to the weld groove to produce the weld joint such that the heat-affected-zone of the weld joint is substantially free of rogue grains.

Methods for producing weld joints having thermally enhanced heat-affected-zones with excellent fracture toughness

Weld metals suitable for joining high strength, low alloy steels are provided. These weld metals have microstructures of acicular ferrite interspersed in a hard constituent, such as lath martensite, yield strengths of at least about 690 MPa (100 ksi), and DBTTs lower than about &minus;50&deg; C. (&minus;58&deg; F.) as measured by a Charpy energy versus temperature curve. These weld metals include about 0.04 wt % to about 0.08 wt % carbon; about 1.0 wt % to about 2.0 wt % manganese; about 0.2 wt % to about 0.7 wt % silicon; about 0.30 wt % to 0.80 wt % molybdenum; about 2.3 wt % to about 3.5 wt % nickel; about 0.0175 wt % to about 0.0400 wt % oxygen, and at least one additive selected from the group consisting of (i) up to about 0.04 wt % zirconium, and (ii) up to about 0.02 wt % titanium.

Weld metals with superior low temperature toughness for joining high strength, low alloy steels

Growing community of inventors

Sugar Land, TX, United States of America

Douglas Paul Fairchild