Abstract: A mechanically alloyed composition of matter or alloy containing 30-40% chromium, 5-25% cobalt, 0.5-10% iron, 0.2-0.6% aluminum, 0.3-1.2% titanium, up to 0.15% carbon, about 0.2-1% yttria, up to about 0.3% nitrogen, the % titanium being at least about 1.4 times the % nitrogen, minor amounts of optional elements, the balance being essentially nickel. The consolidated and hot worked alloy with coarse grains produced by heat treatment at about 1300.degree. C. is useful in service requiring hot strength along with extraordinary resistance to oxidation, sulfidation and hot corrosive media. Specific utilization of the alloy of the invention is contemplated in handling molten glass and in utensils adapted to be used in contact with molten glass, e.g. spinners.

Abstract: The present invention is directed to maraging steels, and particularly to a maraging steel of the cobalt-free type possessing such a combination of strength and fracture toughness that it is suitable for use in respect of demanding applications requiring product forms of very substantial section size.

Abstract: A bit basket mounted on a drilling rig for making and breaking drill string connections. A movable "Y"-like shaped cam is swivelly mounted within a body. Drill string components, such as drill bits and hammers, extend into the basket. The cam has an arcuate engaging face with two tip ends. The cam is thrown so as to engage and hold the component stationary. The connection is then made or broken by the requisite rotation of the drill string by the drilling rig.

Abstract: A method for pickling and consolidating water atomized metallic powders to reduce surface oxides. The technique includes introducing the powder into an acid bath--preferably nitric acid and hydrofluoric acid, rinsing the powder, introducing the powder into an alkaline bath, rinsing the powder and then consolidating the powder into a workpiece. Alternatively, the powder can be additionally introduced into a second acid bath and/or placed into a finishing boric acid bath before consolidation.

Abstract: An austenitic, age-hardenable nickel-iron-chromium alloy exhibiting high-strength, good corrosion and polythionic acid resistance and having a low work hardening rate. The economic alloy is useful for industrial vessels such as heat exchangers, chemical and petrochemical equipment and, more particularly, tubes. The alloy includes about 25-29.5% nickel, about 14.5-17.5% chromium, about 2-3.5% molybdenum, about 2-5.5% copper, about 1-5% titanium plus aluminum, up to about 1.5% manganese, up to about 0.1% cerium, and the balance mostly iron.

Abstract: A pipe cutting tool especially adapted to cut the interior of in-the-hole (I-T-H) drill pipe to allow subsequent removal of the pipe above the cut. Due to blasting damage, long sections of I-T-H pipe, otherwise in good condition, cannot be removed because the damaged section prevents the removal of the entire drill string. The tool is adapted to receive power from an external source and includes a frame, a pivoted motor and cutter, and an actuator for pivoting the motor.

Abstract: A rotary batch-type grinding mill for processing powder is provided with an improved system for discharging material under seal from the atmosphere. The discharge system comprises a sealable collection chute having a banana-like configuration secured on the mill shell at an outlet port in the shell and extending substantially parallel to the circumference of the shell, a grate which prevents discharge of the grinding media from the mill during unloading of material from the mill and an elastomeric faced sealing plate which covers the grate during operation of the mill. The sealing plate is operated from outside the sealed system so that discharge from the mill can be effected without breaking the seal and the sealing plate is so disposed that in the open position it does not interfere with the flow of powder out of the mill.

Abstract: A technique for rendering toxic metals (chromium, lead, cadmium and arsenic) contained in steel plant furnace dust innocuous and suitable for burial with minimal adverse environmental impact. Pelletized iron oxide containing dust is introduced into a rotary hearth furnace under a reducing atmosphere in excess of 600.degree. C. The higher iron oxides are reduced to FeO which in turn complexes with the toxic metals to form relatively benign products.

Abstract: A rock bolt system (10) including a mechanical rock bolt (12) having an interior channel (24) therein and a feeder attachment (14). An anchor may be affixed to the distal end of the rock bolt (12). An aperture (22) extends from the rock bolt (12). The feeder attachment (14), capable of being demountably affixed to the proximal end of the rock bolt (12), supplies hardenable material to the interior channel (24) where it courses through the interior of the rock bolt (12) and exits into the bore hole (16) through the aperture (22). A breather tube (38) extending from the feeder apparatus and into the interior channel (24) permits entrapped air to escape.

Abstract: A method of manufacturing nickel-iron-chromium alloys for use with recuperators. A combination of intermediate annealing, cold working and final annealing results in an alloy having a greater yield strength than a corresponding solution annealed material. The resultant alloy exhibits an isotropic structure and has high corrosion resistance, a low coefficient of expansion and high levels of ductility and strength.

Abstract: An apparatus for continuously conveying ore and the like. A penetrator, rotatably disposed about a common coaxial horizontal axis shared by the forward section of a first conveyor, fluidizes a muck pile to continuously load material onto the first conveyor. Actuators for independently oscillating the penetrator and independently positioning the first conveyor are provided. An optional second conveyor may be employed to transport the material away from the first conveyor.

Abstract: An apparatus (10) and method for consolidating and sintering a tube preform (12) previously fabricated by powder metallurgical techniques. A plurality of forming dies (22, 24) and movable mandrels (30, 32) cooperate to form tube consolidation zone (58,60). One-way tube gripping means (42) permit the tube (12) to progress through the apparatus (10) by the retraction of the mandrels (30, 32) while preventing the tube (12) from retreating back into the zone (58) when the mandrel (30, 32) is advanced. Heating coils (18A, 18B and 18C) heat the tube (12) to sinter it and cause it to expand clear of the mandrels (30, 32). The tube (12) is reduced in diameter and consolidated to greater than 90% theoretical density.

Abstract: A method for utilizing a powder metallurgy ("P/M") slurry by employing water atomized metallic powders and subsequently reducing the oxide levels therein to acceptable levels. The slurry comprises a carbon containing binder. The slurry is consolidated and sintered under controlled conditions to reduce the oxide levels.

Abstract: A radiantly heated, travelling hearth furnace having a supplementary feed means positioned intermediate the initial loading point and the final take-off point to increase the capacity of the furnace for treating objects fed thereto. When the objects are pellets of iron oxide and carbonaceous reductant the provision of supplementary feed means about half-way along the travel path of the hearth promotes uniformity of product by inhibition of reoxidation of reduced iron by exposure to a fossil-fuel-fired furnace atmosphere.

Abstract: 1. An improved method for producing fine nickel powder having a substantially spherical form and size ranging from about 3 microns to about 7 microns, containing sulphur within a critical range of about 0.02% to about 0.

Abstract: A method for forming intermetallic and intermetallic-type precursor alloys for subsequent mechanical alloying applications. Elemental powders are blended in proportions approximately equal to their respective intermetallic compounds. Heating of the blend results in the formation of intermetallic compounds whereas lack of heating results in intermetallic-type powder without the intermetallic structure. The resultant powder is then blended to form a final alloy. Examples involving aluminum-titanium alloys are discussed.

Abstract: A method for forming intermetallic and intermetallic-type precursor alloys for subsequent mechanical alloying applications. Elemental powders are blended in proportions approximately equal to their respective intermetallic compounds. Heating of the blend results in the formation of intermetallic compounds whereas lack of heating results in intermetallic-type powder without the intermetallic structure. The resultant powder is then blended to form a final alloy. Examples involving aluminum-titanium alloys are discussed.

Abstract: A process for removing sulfur dioxide from industrial gas streams by scrubbing the gas with an aqueous slurry including 2CaO.Fe.sub.2 O.sub.3 (dicalcium ferrite). The 2CaO.Fe.sub.2 O.sub.3 is present in lime slags or flotation tailings derived from non-ferrous smelting operations.

Abstract: An apparatus and method for continuously conveying ore and the like. A penetrator, rotatably disposed about a common coaxial axis shared by the forward section of an endless conveyor, fluidizes a muck pile to continuously load material onto the conveyor. The conveyor, hinged approximately amidships, is mounted above a movable frame. Actuators for independently oscillating the penetrator is provided.

Abstract: A consumable electrode including a core wire and a coating adapted for welding clad steel products. The resulting weld deposit overcomes the problem of iron dilution which tends to degrade the weld when available electrodes are utilized. Such clad products are often exposed to sulfur and acidified chloride environments.