An adjustable spacer with hardened end portions and a non-hardened intermediate portion therebetween is mountable between a pair of roller bearings also mounted on a shaft such an axle or spindle or the like. The hardened material contacts the faces of the roller bearings but helps prevent wear therebetween and unwanted movement of the bearings on the shaft. The unhardened material allows the spacer to collapse in the axial direction to maintain desired axial loads on the bearings.

Niobium chromium low allow carbon steel for automotive chain link plates has improved wear resistance. In one preferred embodiment, the steel composition includes niobium, chromium, carbon, iron, and any impurities. One preferred composition including these components includes, by weight percentage, approximately 0.25% to 0.75% carbon, approximately 0.20% to 2.0% chromium, approximately 0.26% to 1.5% niobium, and the remaining component of the composition is iron. Trace amounts of impurities may also be present. In another embodiment, a steel composition includes, by weight percentage, approximately 0.25% to 0.75% carbon, approximately 0.2% to 1.0% manganese, approximately 0.05% to 0.60% silicon, approximately 0.26% to 1.5% niobium, approximately 0.20% to 2.0% chromium, up to approximately 0.30% aluminum, up to approximately 0.03% phosphorus, up to approximately 0.03% sulfur, and a remainder of the composition being iron and any other impurities.

A formed sandwich structure manufactured by a pressure-based forming method that includes steps of (1) positioning a sandwich structure into a cavity of a die assembly, the sandwich structure including a core positioned between a first liner sheet and a second liner sheet, the core including a honeycomb structure having a plurality of cells, and (2) after the positioning, pressurizing the core to expand the sandwich structure into engagement with the die assembly.

A sucker rod for use in a subterranean well can include a martensitic stainless steel material with a chromium content in the range of 11.5 to 13%, and a carbon content in the range of 0.08 to 0.15%, and a length of the sucker rod being at least 60 meters. A method of producing a sucker rod for use in a subterranean well can include producing a martensitic stainless steel material of the sucker rod, the material including chromium in the range of 11.5 to 13%, and carbon in the range of 0.08 to 0.15%, heat treating the material, and winding the material for storage.

A sucker rod for use in a subterranean well and a method of producing same, in which the method can include air quenching a martensitic stainless steel material of the sucker rod. An artificial lift system and a method of flowing a fluid from a well, in which the method can include connecting multiple air quenched and tempered sucker rods in a rod string connected to a downhole pump, and operating the downhole pump, thereby flowing the fluid from the well. A sucker rod can include a stainless steel sucker rod composition in which a carbon content is restricted to the range of 0.08% to 0.15%, and in which the sucker rod composition includes up to 0.20% vanadium content, up to 0.10% niobium content, up to 0.05% titanium content, up to 0.99% nickel content and/or up to 1.0% molybdenum content.

A sucker rod for use in a subterranean well and a method of producing same, in which the method can include air quenching a martensitic stainless steel material of the sucker rod. An artificial lift system and a method of flowing a fluid from a well, in which the method can include connecting multiple air quenched and tempered sucker rods in a rod string connected to a downhole pump, and operating the downhole pump, thereby flowing the fluid from the well. A sucker rod can include a stainless steel sucker rod composition in which a carbon content is restricted to the range of 0.08% to 0.15%, and in which the sucker rod composition includes up to 0.20% vanadium content, up to 0.10% niobium content, up to 0.05% titanium content, up to 0.99% nickel content and/or up to 1.0% molybdenum content.

A furnace for thermal treatment with gaseous atmosphere quenching having a bell inside which there are provided a rotor regulating the gas atmosphere flow, a heat exchanger regulating the temperature of the gas atmosphere and a thermal chamber configured for thermal treatment and the following gaseous atmosphere quenching. The thermal chamber has at least a surface positioned on a side adjacent to the heat exchanger and at least a surface positioned on an opposed side to the adjacent one to the heat exchanger and wherein at least a surface has a plurality of screens which connect the inside of the thermal chamber with the inside of the bell to allow the passage of the gas atmosphere from the thermal chamber to the bell, wherein the screens are adjustable to modify the passage section and so the flow of the gas atmosphere in function of the temperature required by the thermal treatment.

A high-strength seamless stainless steel pipe for oil country tubular goods that is excellent in terms of hot workability, sulfide stress cracking resistance, and corrosion resistance, and a method for manufacturing the steel pipe. The steel pipe has a chemical composition containing Cr and Ni so that the relationship Cr/Ni5.3 is satisfied. A microstructure of the steel pipe includes mainly a tempered martensite phase. Additionally, a surface layer microstructure of the steel pipe includes a phase which looks white when subjected to etching with a Vilella etching solution, the phase having a thickness in the wall thickness direction from the outer surface of the pipe of 10 m or more and 100 m or less and dispersing in the outer surface of the pipe in an amount of 50% or more in terms of area fraction.

A method of forming a golf club head assembly includes aligning a faceplate with a recess of a club head; welding the faceplate to the club head; then, after welding the faceplate, heating the club head and the faceplate to at least a solvus temperature of the faceplate for a predetermined amount of time; and then, after heating the club head and the faceplate, allowing the club head and the faceplate to air cool.

The invention relates to a charging apparatus for the dimensionally stable heat treatment of workpieces (1), in particular those of a disk or ring shape, having a charging rack (10) for horizontally mounting the workpiece (1), wherein at least s three screw-type mandrels or ball joint mandrels (2) are arranged on the charging rack (10), the ball joint mandrels (2) having a base plate (3) with a female thread (7), a screw element (4) with a male thread (7) matched to the female thread (7) and a head that has a spherical segment surface, as well as a pressure piece (5) matched precisely to the spherical segment surface of the head and arranged movably thereon.