Abstract: A filler wire weld composition is set forth which provides high yield strength characteristics comparable to a base substrate made from a high performance Ni--Cr steel alloy. The filler wire weld composition is useful for repair welding substrate alloys used commercially in contexts such as turbine components such as rotors and discs.

Abstract: This invention provides alloys having optimum high and low temperature mechanical properties for use of both the high and low pressure ends of turbine rotors in a single row power generation turbine with a service temperature profile from about 75.degree.-1200.degree. F. (24.degree.-649.degree. C.). The alloys include about 8.00-9.5 wt. % Cr and about 0.85-1.05 wt. % Mo and are heat treated at 1225.degree.-1350.degree. F. (663.degree.-732.degree. C.) for at least about one hour. The alloys and the components manufactured from these alloys preferably include a room temperature 0.2% yield strength of about 80-110 ksi (551-758 MPa).

Abstract: A method for repairing a rotor includes severing the rotor into two or more rotor segments. After removing a portion of material including the crack from the rotor, weld metal is deposited onto the rotor until the removed portion is replaced with weld metal. A built-up portion is welded onto a surface positioned adjacent a bore of each of the rotor segments. One of the built-up portions is machined into a female spigot and the other build-up portion is machined into a male spigot for engagement of the rotor segments. The female and the male spigots are engaged for alignment of the rotor segments. The rotor segments are welded together with weld metal, which is deposited in a welding groove formed between the rotor segments and the spigots. After the rotor segments are joined together, the male spigot, the female spigot, and a portion of the weld metal positioned near the root fusion area are removed to restore the bore of the rotor to its original diameter.

Abstract: A turbine rotor is formed from two rotor segments that are composed of different low alloy steels, one a high temperature alloy and the other a low temperature alloy. The rotor segments have cavities in confronting faces that form an annular flange at the outer surface, with the segments welded together across the flange. A clad layer is first welded on one of the flanges and a filler material welds the clad layer to the other flange to form a composite turbine rotor.

Abstract: A more creep resistant turbine rotor and novel methods for repairing worn surfaces of Cr-Mo-V steam turbine components are disclosed. These methods include specified alloy compositions and welding procedures that minimize weld stresses and cracking. These alloys exhibit improved creep and fatigue properties and are preferably deposited using a gas tungsten arc welding procedure. Bead sequencing, cooling side plates and the use of run-off tabs are also disclosed for minimizing welding defects in turbine rotors and discs.

Abstract: System for repairing worn surfaces of steam turbine components and especially high pressure turbine rotors, are disclosed. These systems include depositing a first layer of weld metal on a worn surface of the component, whereby a heat-affected zone is created. A second layer of weld metal is then deposited over the first layer using a greater amount of heat to temper at least a portion of the heat-affected zone produced by the first layer. The preferred embodiments include the use of gas tungsten arc welding for providing fine-grain size and more creep resistance, especially in the weld and heat-affected zone. The resulting build-up can be machined, for example into a blade fastening to produce a component having properties equal to or better than the base-metal alloy. The invention also provides a longer lasting turbine system, including rotors which have serrated steeples that are more resistant to failure.

Abstract: Novel methods for repairing worn surfaces of turbine rotors, are disclosed. These methods include depositing a first layer of weld metal on a worn surface of the component, whereby a heat-affected zone is created. A second layer of weld metal is then deposited over the first layer using a greater amount of heat to temper at least a portion of the heat-affected zone produced by the first layer. The preferred embodiments include the use of gas tungsten arc welding for producing fine-grain size and more creep resistance, especially in the weld and heat-affected zone. The resulting build-up can be machined, for example into a blade fastening to produce a component having properties equal to or better than the base-metal alloy. The invention also provides a longer lasting turbine system, including rotors which have serrated steeples that are more resistant to failure.

Abstract: A more creep resistant turbine rotor and novel methods for repairing worn surfaces of Cr-Mo-V steam turbine components are disclosed. These methods include specified alloy compositions and welding procedures that minimize weld stresses and cracking. These alloys exhibit improved creep and fatigue properties and are preferably deposited using a gas tungsten arc welding procedure. Bead sequencing, cooling side plates and the use of run-off tabs are also disclosed for minimizing welding defects in turbine rotors and discs.

Abstract: A method for modifying an original blade supporting disc (8) which is integral with a turbine rotor (2), and which has an original outline, in order to create a modified disc (8) which has an outline different from the original outline and which provides a blade-supporting region (10) of increased size, including the steps of:machining away portions (14,16) of the original disc (8) which protrude beyond the outline of the modified disc (8);building up the original disc (8) with weld metal past the outline of the modified disc (8) at all locations (14,20) where the outline of the original disc (8), after the machining step, is enclosed by the outline of the modified disc (8); andmachining away parts of the weld metal to the outline of the modified disc (8).

Abstract: A detachable or separable scraper bar attachment for various types of trad vehicles includes first, second, and third generally planar rectangular bar elements which when fixedly interconnected and attached to a vehicle's body frame form a generally U-shape or .mu.-shape configuration, of which the first and third bar elements constitute generally parallel legs of the u-shape or .mu.-shape portion. It is mounted with the legs generally also parallel to the vehicle's cylindrical drive sprocket hub subassembly. One leg is in close proximity to the hub to facilitate the scraping of collected mud or debris, and the other leg is adapted to be operatively rigidly attached to the vehicle frame; and the second bar element which constitutes a bight portion connecting the legs of the u-shape or .mu.-shape portion is notably canted at an angle of between about 45.degree. and 60.degree. to laterally deflect the scraped-off mud or debris away from the track paths.

Abstract: Forgings fabricated from 9 Chromium - 1 Molybdenum, modified alloys are subjected to tempering at a temperature less than the ASTM specified minimum tempering temperature in the range from about 1275.degree. F. to about 1300.degree. F. for a period of time in the range of from about 5 to about 20 hours to cause the forging to have a room temperature yield strength in the range from about 85 to about 100 ksi. Such room temperature yield strengths permit the use of the alloy in the fabrication of high-pressure steam turbine rotors. Forgings fabricated from such alloys possess excellent high-temperature properties and the same are also weldable to facilitate repair of rotors fabricated therefrom and to facilitate the fabrication of the rotor in the first instance by forming the rotor from smaller sections which may be welded together and subsequently tempered at a temperature in the range from about 1275.degree. F. to about 1300.degree. F.

Abstract: This is a method for repairing low alloy steel steam turbine (both high pressure and low pressure sections) or generator rotors. The defective section of the original rotor is removed and a replacement end is used, with mating attachments machined on the replacement end and the original rotor. The inner portion of the weld joining the replacement end to the original rotor is provided by a narrow gap weld, either by gas metal or by submerged arc welding. The outer 1/2-2 inches of the weld is provided by gas tungsten arc welding. The mating attachment and at least the inside 1/4 inch of the weld is bored out to remove possible crack initiation sites and to provide a smooth inspectable bore. In this manner, a fast and reliable technique is provided which provides accurate alignment, fast, essentially distortion free welding, and the superior mechanical properties of gas tungsten arc welding in the outer, more highly stressed zones.

Abstract: Method and apparatus for rebuilding advance weights of a distributor assembly. The apparatus includes a drilling fixture having a hole and a weight-engaging balance pin positioned to one side of the hole, and a stepped pin having a large diameter shank accommodated by the hole in the drilling fixture and a small diameter shank accommodating deformed oblong holes of the advance weights. The method includes positioning the deformed oblong hole of the advance weight on the small diameter shank of the stepped pin establishing the original axis of the original hole, balancing the advance weights against the balance pin, removing the stepped pin, and drilling the deformed oblong holes in the advance weights out to an oversized round hole. Subsequently, the advance weights are reinstalled with a nylon bushing in the bored oversized hole on the pins of the distributor assembly. The apparatus of the drilling fixture and stepped pin can be sold in an over-the-counter kit at auto part stores and repair facilities.

Abstract: A specific gravity tester for antifreeze solutions including a transparent tube, a bulb on one end, and a sample-collecting hose on the other end; the transparent tube being of molded plastic and defining an interior guideway with broad, flat surfaces having projecting ribs to maintain the floats in spaced relation to the surfaces, the sidewalls of the tube having flat inner surfaces defining the guideway and rounded convex exterior surfaces to provide the sidewalls of the transparent tube with a magnifying lens characteristic.

Abstract: A spark plug cover removing tool having a pair of lever arms which are very short and have hook-shaped gripping portions and jaws which are circular to embrace and grip the boot covering a spark plug, the jaws extending substantially less than semicircularly to define longitudinal edges to bite into the resilient spark plug boot and end lips or flanges extending transversely of the end of the jaws to bear against the end of the boot.

Abstract: A V-belt manipulating tool including an elongate rubber-like base having a V-shaped clip at one end to stabilize the tool in the pulley groove, there being upstanding rigid ears on the metal clip for manipulating the V-belt, the tool also having an upstanding lug at the opposite end with an oblique camming face at one side to guide and direct the V-belt off to the side of the pulley in removing the belt from the pulley.

Abstract: An improved mercury vapor lamp construction as described which includes an ultraviolet reflecting underlayer of alumina particles for the phosphor coating to enable reduction in the phosphor coating weight without accompanying reduction in the lamp lumen output. The alumina underlayer comprises spherical alumina particles that have been vapor-deposited in a certain particle size range to provide selective reflection of the ultraviolet radiation being emitted from the overlying phosphor coating. The alumina underlayer is deposited upon the interior surface of the lamp glass envelope and has been found generally useful in otherwise conventional high-pressure and low-pressure mercury vapor lamps.