Abstract: Implementations of a portable racetrack are provided. In some implementations, the portable racetrack comprises a foldable board comprising a plurality of holes configured to secure accessories to the board. In some implementations, the portable racetrack further comprises detachable guard rails operatively attached to the foldable board using the holes. In some implementations, the portable racetrack includes no mechanism on the foldable board to guide a remote control car that is operated on the racetrack except the guard rails so that the remote control car may freely travel on the racetrack.

Abstract: Implementations of a modular chassis adapter are provided. In some implementations, a toy remote control vehicle having a plurality of modular chassis adapters according to the present disclosure are provided. In some implementations, the remote control vehicle comprising a set of front wheels, a set of back wheels and a toy car chassis having a front end, a back end, a right side, and a left side wherein the front wheels and back wheels are operatively connected to the toy car chassis. In some implementations, a first modular chassis adapter according to the present disclosure is attached to the front end of the toy car chassis such that the first modular chassis adapter is positioned in front of the front wheels of the remote control vehicle and wherein the first modular chassis adapter is sized such that if an object obstructs the toy remote control vehicle while in motion, the wheels of the toy remote control vehicle do not touch the object.

Abstract: A molybdenum article is disclosed in which the substrate thereof has adherently bonded thereto a thermally self-healing plasma-sprayed coating consisting essentially of a composite of molybdenum and a refractory oxide material capable of reacting with molybdenum oxide under oxidizing conditions to form a substantially thermally stable refractory compound of molybdenum. The plasma-sprayed coating is formed of a plurality of interbonded plasma-sprayed layers of a composite of molybdenum/refractory oxide material produced from a particulate mixture thereof. The coating comprises a first layer of molybdenum plasma-sprayed bonded to the substrate of said molybdenum element and a second layer of plasma-sprayed mixture of particulate molybdenum/refractory oxide consisting essentially of predominantly molybdenum bonded to the first layer.

Abstract: A molybdenum article is disclosed in which the substrate thereof has adherently bonded thereto a thermally self-healing plasma-sprayed coating consisting essentially of a composite of molybdenum and a refractory oxide material capable of reacting with molybdenum oxide under oxidizing conditions to form a substantially thermally stable refractory compound of molybdenum. The plasma-sprayed coating is formed of a plurality of interbonded plasma-sprayed layers of a composite of molybdenum/refractory oxide material produced from a particulate mixture thereof. The coating comprises a first layer of molybdenum plasma-sprayed bonded to the substrate of said molybdenum element and a second layer of plasma-sprayed mixture of particulate molybdenum/refractory oxide consisting essentially of predominantly molybdenum bonded to the first layer.

Abstract: A process for producing homogeneous binary alloys comprised of a first element present in a major amount having a melting point below the liquidus of the binary alloy and a second element present in a minor amount having a melting point above the liquidus of the binary alloy, whereby the second element is formed into a semi-consumable electrode and is employed to melt the first element progressively fed into a crucible or mold. The power for forming the high energy electric arc is controlled to maintain a molten pool in the crucible and to effect a progressive melting of the semi-consumable electrode, whereby liquid droplets of the higher melting alloy enter and become substantially completely dissolved in the molten pool at a controlled rate in consideration of the rate of feed of the first element to provide a resultant binary alloy having the desired proportion of the two alloying elements. The process is particularly applicable for producing homogeneous ingots of titanium-molybdenum binary alloys.

Abstract: An improved tubular product and method of producing tubular products comprised of a low-alloy high-strength steel which are possessed of improved resistance to sulfide stress-cracking as a result of exposure to sour crude oils and natural gases containing hydrogen sulfide while subjected to high tensile stresses. The improved tubular product is characterized as incorporating a residual compressive stress in the stratum adjacent its inner surface, which is produced by rapidly quenching the inner side of the tubular product from an elevated tempering temperature ranging from above about 1000.degree. F to a temperature below the transformation temperature of the steel structure.