Abstract: A coating composition comprises a slurry consisting essentially of an aluminum neutralized phosphate bonding solution and aluminum powder. The bonding solution advantageously contains a relatively small but essential amount of vanadium pentoxide and, preferably, magnesium. A process for forming the bonding solution component of the coating slurry includes equilibrating an aqueous phosphate solution with a small but controlled and necessary amount of solute aluminum prior to adding aluminum powder to form the slurry. The present invention overcomes the problem of bonding solutions which require environmentally disadvantageous chromates or molybdates.

Abstract: A flowable slurry comprising powder matrix particles and reinforcing particles is pumped, under pressure, through an atomizing nozzle to form discrete droplets containing reinforcing particles coated with the powder matrix particles The discrete droplets are suspended in an elevated temperature environment for a sufficient time to evaporate the water from the droplets and form nonreacted reinforced powder particles. The reinforced powder particles are nonagglomerated and are suitable for immediate use as powder for thermal spray coatings or for dry processed compacted structural components.

Abstract: A coating composition for ferrous metal alloy surfaces comprises a slurry consisting essentially of an aluminum neutralized phosphate bonding solution and aluminum powder. A process for forming the bonding solution component of the coating slurry includes equilibrating an aqueous phosphate solution with a small but controlled and necessary amount of solute aluminum prior to adding aluminum powder to form the slurry. The bonding solution preferably also contains magnesium. The present invention overcomes the problem of bonding solutions which require environmentally disadvantageous chromates or molybdates to neutralize the bonding solution prior to formation of the slurry.

Abstract: A coating for a metallic substrate has a metallic bond coat, a metallic seal coat and a centrally disposed layer of ceramic material. Transition layers comprising a controllably positioned mixture of metallic and ceramic materials are interposed, respectively, between the bond coat and the central layer of ceramic material, and between the seal coat and the central layer of ceramic material. The coating provides a desirable thermal barrier for internal engine components. Further, the coating is graded to avoid harmful internal thermal stress between dissimilar materials in the coating, and has a sealed external surface that is resistant to corrosion, erosion, hot gas infiltration, and wear during operation in an internal combustion engine.

Abstract: A paving material distribution system for uniformly distributing a layer of paving material includes a containment member that is slidably mounted on the rear frame of a paving machine. A first means for conveying paving material laterally with respect to the direction of travel of the paving machine is positioned at a preselected distance from the containment member. Power means are also included to controllably, simultaneously move the containment member and the first means in a substantially vertical direction.

Abstract: In accordance with one aspect of the present invention, a modular screed assembly attachment for an asphalt paving machine having a main screed unit, includes a support assembly that is detachably connectable to the main screed unit, a movable carriage slidably mounted on the support assembly, and a platform assembly movably connected to the movable carriage. The modular screed assembly attachment also includes means for moving the carriage between a position adjacent the main screed unit and a position spaced from the main screed unit, and means for selectively positioning the platform assembly elevationally with respect to the carriage.

Abstract: A method for painting an engine by the electrocoating process includes coating preselected components of the engine with an electrically nonconductive ceramic material prior to assembly, and pressurizing the engine prior to immersion in an electrically charged paint bath.The method is particularly useful for avoiding paint deposition on preselected components, such as the hot exhaust elements, of an engine. A thermal insulating and corrosion resistant coating for the preselected components is thus provided, and undesirable paint burnoff during subsequent engine operation is avoided.

Abstract: An apparatus 400 and a method are provided for increasing the density of a compactible material 10 while continuously evaluating the density of the material. The evaluation of material density is carried out by calculating the total of the static, dynamic and centrifugal forces applied by a vibrating tool 102 l to the compactible material 10. The total applied force calculation includes measuring the vertical acceleration of the material contacting member 102 and the position of an eccentric mass 206 mounted on the material contacting member 102. The acquisition of these parameters is carried out simultaneously, and the calculation of the dynamic and centrifugal forces is made when the material contacting member 102 is at its lowest position.

Abstract: An apparatus and a method are provided for controlling the frequency of vibration of a compacting machine. The frequency control is carried out by the apparatus which determines the actual time at which a ground contacting member of the compacting machine is at its true vertically lowest position. This is determined by measuring the time at which the vertical acceleration of the ground contacting member has a maximum value during one rotation of an eccentrically mounted, vibration inducing mass. The time difference between the time at which the vibration inducing eccentric mass is at predetermined position and the time at which the acceleration of the ground contacting member is at the maximum value is used to calculate a phase angle relationship (.phi.) between the ground contacting member and the eccentrically attached member. This method of determining the phase angle relationship (.phi.

Abstract: A composite ceramic and metal article having a thermal insulating component formed of single phase magnesium stabilized aluminum titanate and an in situ cast structural component formed of a high melting temperature metallic material. The composite article is particularly useful as exhaust port and manifold structures in internal combustion engines.

Abstract: A deep hardening steel has a composition comprising, by weight, about 0.26% to 0.37% carbon, about 0.5% to 1.0% manganese, about 1.0% to 3.0% silicon, about 1.5% to 2.5% chromium, about 0.3% to 1.0% molybdenum, from 0.05% to 0.2% vanadium, from 0.03% to 0.1% titanium, from 0.01% to 0.03% aluminum and at least 0.005% nitrogen. Also, the composition preferably contains less than about 0.025% each of phosphorus and sulfur. After quenching and tempering, articles made of this material are substantially free of aluminum nitrides, have a fine grained microstructure, and a combination of high hardness and fracture toughness.The deep hardening steel article embodying the present invention is particularly useful for ground engaging tools that are subject to breakage and abrasive wear at high temperature.

Abstract: A process for recovering paint overspray particles includes bringing the paint particles into contact with a plurality of hydrophobic fumed silica particles and encapsulating the paint particles within a plurality of the silica particles. The recovered encapsulated particles may be mixed with a suitable solvent, milled and blended with preselected additive materials, to form a desirable reconstituted paint material.

Abstract: A paint fixture, for supporting a workpiece during the electrostatic application of a spray paint, has an electrically conductive metallic body. The body has a first surface portion that is covered by the workpiece during the electrostatic paint spray application process, and a second surface portion that is covered by a heat resitant, electrically nonconductive material.

Abstract: An end closure for the cutter housing of a road planer in which a pair of self-opening and self-closing cover plates provide a protective cover over a shaft clearance opening in the end wall of the housing. The cover plates, pivotally mounted on an external wall surface of the housing, move between a closed position at which the cover plates cooperatively overlay the shaft clearance opening, and an open position at which clearance is provided for a rotatable shaft extending through the housing end wall, in response to moving the end wall vertically with respect to the frame on which the cutter is rotatably mounted.

Abstract: A control system for a road planer in which the mechanical drive components are selectively and sequentially controlled in response to operator inputs and to sensed operating conditions. The control also responds to the occurrence of predefined fault events and internal system failures by controlling the operation of one or more of the mechanical drive line components in a preselected order. Suitable time delays are provided between the execution of selected commands to prevent undesirable wear or loads on components of the drive train.

Abstract: A process for forming a carburized steel article includes carburizing a steel material containing not more than 0.10% silicon and less than 1.1% chromium to form an austenitic surface matrix having a high density of carbides dispersed therein. After quenching, the carburized steel article is characterized by an outer surface having a high ratio of carbides and is substantially free of intergranular oxides. As a result of preventing undesirable surface oxide formations and simultaneously providing a beneficial surface carbide structure, the bending fatigue strength, wear properties, and contact fatigue strength of articles such as gears, shafts, bearings and couplings are greatly enhanced.

Abstract: A chip conveyor moves material through a conduit using plates of substantially oval shape, the axis of symmetry of which coincides substantially with the axis of the drive chains. The plates consist of two identical half-plates joined together and mounted on the drive chain. The conveyor is especially useful for transporting chips from machine tools.

Abstract: A through hardening nitriding grade alloy steel includes aluminum in a range of 0.07% to 0.20% by weight and vanadium in a range of 0.03% to 0.10% by weight.Prior art nitriding grade alloy steel generally have relied on molybdenum, nickel and other expensive alloy additions to provide nitridability and core hardness. The present invention includes only essential amounts of carbon, manganese, and chromium, in addition to small, controlled amounts of aluminum and vanadium. The present invention is not only economical to produce due to the absence of significant amounts of costly alloying elements, but also has a unique combination of hardenability, resistance to loss of hardness during tempering, and excellent nitride response.Articles manufactured from the new alloy steel are desirably hardened, tempered, machined and nitrided, and are useful in applications requiring high wear resistance, toughness, and high stress loading.

Abstract: An automatic wrapping apparatus for wrapping an external tape support about a filter element includes an indexable turret assembly having a plurality of filter element clamps rotatably mounted at spaced radial positions on the indexable turret. Means are provided at one of the radial positions for rotating a filter element clamp about a longitudinal axis. The wrapping apparatus also includes means for selectively varying the position of the strand of tape along the longitudinal axis during rotation of the clamp. Further, the apparatus includes means for severing the strand of tape and wrapping the severed ends about a respective pleated filter assembly.

Abstract: A ceramic to metal joint particularly advantageous in a recuperator tube assembly, includes a ceramic tube and a spaced, circumferentially disposed metal sleeve. A bonding material is cast between the ceramic and metal members. A seal member has sufficient ductility within a predetermined thermal operating range to plastically deform and yet maintain an effective fluid seal between the ceramic and metal members. The present invention is particularly useful in the construction of a modular heat exchanger unit. Both individual tube assemblies and module units can be individually removed for cleaning, inspection, or replacement.