A method for continuously applying hardbanding to an oil and gas tubular or building up a worn oil and gas tubular that includes low heat input welding without compromising the mechanical properties of the tubular. The method includes preparation of the surface of the oil and gas tubular and applying a consumable wire to the surface. The consumable wire may be hardbanding or buildup material with a hardness that is similar to the hardness of the oil and gas tubular.

Processes and methods related to processing and hot working alloy ingots are disclosed. A metallic material layer is deposited onto at least a region of a surface of an alloy ingot before hot working the alloy ingot. The processes and methods are characterized by a reduction in the incidence of surface cracking of the alloy ingot during hot working.

A carriage for inspecting the integrity of a spiral weld in a tubular is arranged to be driven axially within the tubular by the weld as the tubular is rotated. The carriage includes one or more transducers for transmitting to and receiving data from the weld.

A hardfacing metal composition and method of restoring worn work string tubing by application of a hardfacing metal to the worn regions of the work string tubing.

The invention relates weldments useful as heat transfer tubes in pyrolysis furnaces. The invention relates to tubes that are useful in pyrolysis furnaces. The weldments include a tubular member and at least one mixing element. The tubular member comprises an aluminum-containing alloy. The mixing element comprises an aluminum-containing alloy. The mixing element's aluminum-containing alloy can be the same as or different from the tubular member's aluminum-containing alloy. Other aspects of the invention relate to pyrolysis furnaces which include such weldments, and the use of such pyrolysis furnaces for hydrocarbon conversion processes such as steam cracking.

A system and a method of forming a wear surface of a wheel of a rail vehicle include depositing one or more alloy powders onto a main body of the wheel, and plasma transfer arc welding the one or more powders to form one or more alloy layers secured to the main body.

The invention relates weldments useful as heat transfer tubes in pyrolysis furnaces. The invention relates to tubes that are useful in pyrolysis furnaces. The weldments include a tubular member and at least one mixing element. The tubular member comprises an aluminum-containing alloy. The mixing element comprises an aluminum-containing alloy. The mixing element's aluminum-containing alloy can be the same as or different from the tubular member's aluminum-containing alloy. Other aspects of the invention relate to pyrolysis furnaces which include such weldments, and the use of such pyrolysis furnaces for hydrocarbon conversion processes such as steam cracking.

Various methods of hardbanding an apparatus are described. In one aspect of the invention an improved method of re-applying a hardbanding alloy to worn tool joints of a previously hardbanded drill pipe results in preservation of the metallurgical properties of the drill pipe and preservation of the internal polymer coating that lines the drill pipe. A method for applying hardbanding includes arc welding a consumable metal welding wire to a tool joint having a surface temperature that ranges from about 50 F. to about 170 F. and the arc welding power supply utilizes DC current. The method herein produces a hardbanded tool joint comprising a heat affected zone (HAZ) of a based metal having a Rockwell hardness of 40 Rc or less.

Various methods of hardbanding an apparatus are described. In one aspect of the invention an improved method of re-applying a hardbanding alloy to worn tool joints of a previously hardbanded drill pipe results in preservation of the metallurgical properties of the drill pipe and preservation of the internal polymer coating that lines the drill pipe. A method for applying hardbanding includes arc welding a consumable metal welding wire to a tool joint having a surface temperature that ranges from about 50 F. to about 170 F. and the arc welding power supply utilizes DC current. The method herein produces a hardbanded tool joint comprising a heat affected zone (HAZ) of a based metal having a Rockwell hardness of 40 Rc or less.

A build-up welding method (100) is disclosed in which a welding torch (1) is guided along a metallic workpiece (2) and at least one melting wire (5) serving as a build-up material (6) is fed at an infeed speed (9) into the arc (4) between at least one non-melting electrode (3) of the welding torch (1) and the workpiece (2). In order to achieve a build-up welding method (100) with higher build-up speeds in comparison to the prior art, it is proposed for the non-melting electrode (3) positioned normal to the workpiece (2) to be guided along the workpiece (2) and for the fed wire (5) to also be moved back and forth along its infeed direction (9).