Abstract: An Fe-Ni alloy sheet for a shadow mask excellent in etching pierceability, preventing sticking during annealing, and inhibiting production of gases, which consists essentially of:______________________________________ nickel (Ni) from 34 to 38 wt. %, silicon (Si) from 0.01 to 0.09 wt. %, aluminum (Al) from 0.002 to 0.020 wt. %, calcium (Ca) from 0.0002 to 0.0020 wt. %, magnesium (Mg) from 0.0003 to 0.0020 wt. %, where, Ca + 1/2 Mg from 0.0005 to 0.0025 wt. %, ______________________________________andthe balance being iron and incidental impurities,where, the contents of carbon (C), nitrogen (N), sulfur (S), oxygen (O) and phosphorus (P) as the incidental impurities being respectively:up to 0.0050 wt.% for carbon,up to 0.0020 wt.% for nitrogen,up to 0.0020 wt.% for sulfur,up to 0.0040 wt.% for oxygen, andup to 0.0040 wt.% for phosphorus,where, 1/10 C+1/10 N+S+1/5 O+1/2P:up to 0.0045 wt.%, andCa+1/2 Mg.gtoreq.

Abstract: A high strength martensitic stainless steel having superior anti-fatigue characteristics when used in a corrosive or erosive environment. The steel has a proof strength of 80 to 110 kg/mm.sup.2 and a composition containing specified amounts of carbon, silicon, manganese, chromium, nickel, molybdenum, vanadium, and nitrogen, the balance being substantially iron and incidental inclusions. The contents of the additives are such that a nickel equivalent Nieq given by the following Formula (1) ranges between 10.5 and 12.9 wt. %:Nieq=[Ni]+[Mn]+0.5[Cr]+0.3 [Si]+[Mo] (1)where, [Ni], [Mn], [Cr], [Si], and [Mo], respectively represent the contents of Ni, Mn, Cr, Si, and Mo, respectively. The steel may also contain niobium or copper. The steel is produced by a process which includes a hot work and a subsequent cooling at a specific cooling rate to a specific temperature range.

Abstract: Improved aluminum master alloys containing strontium and boron are provided for simultaneously modifying and grain refining Al alloys, and in particular, hypoeutectic Al-Si alloys. The improved master alloy contains, by weight percent, about 0.20-20% Sr, 0.10-10% B, and the balance Al with impurities. The master alloy may also contain about 0.20 to about 20% Si by weight percent. The master alloys have a high degree of ductility for purposes of forming continuously rolled master alloy rod stock.

Abstract: A protective layer for a metal substrate is metallurgically bonded to the substrate and contains (as a percentage by mass) 35 to 50% chromium, up to 10% of which can be replaced by molybdenium, and at least iron, the proportion of iron being at least 25%. The minimum hardness is 800 HVO.1, obtained by a structure having a minimum content of 5% by volume as sigma phase. The sigma phase is obtained by heat-treatment of the coated substrate. The protective layer is particularly resistant to corrosion and also has good resistance to erosion and wear.

Abstract: A metal alloy for cast prosthetic frames in dentistry, consisting of (in % by weight)______________________________________ 0.1 to 0.3 % C up to 1.5 % Si up to 3 % Mn 25 to 35 % Cr 3 to 6.5 % Mo 0.5 to 5 % Ta 0.15 to 0.40 % N ______________________________________remainder cobalt and residual impurities.

Abstract: A method of forming a wear-resistant coating for internal combustion engine component parts which allows the part to remain dimensionally stable under severe engine operating conditions is provided. The coating is formed by a two step method. First, the engine part is coated with chromium to form a chromium base layer. Second, the chromium coated part is subjected to a reactive gas plasma in a reaction chamber at an elevated temperature and under an applied electrical potential. The gas of the plasma reacts with the chromium to form the wear-resistant layer. Preferably, the reactive gas is nitrogen which reacts with the chromium to form a chromium nitride surface layer on the chromium base layer.

Abstract: The present invention provides a process for making high strength, high ductility, low density rapidly solidified aluminum-base alloys, consisting essentially of the formula Al.sub.bal Zr.sub.a Li.sub.b X.sub.c, wherein X is at least one element selected from the group consisting of Cu, Mg, Si, Sc, Ti, U, Hf, Be, Cr, V, Mn, Fe, Co and Ni, "a" ranges from about 0.2-0.6 wt %, "b" ranges from about 2.5-5 wt %, "c" ranges from about 0-5 wt % and the balance is aluminum. The alloy is given multiple aging treatments after being solutionized. The microstructure of the alloy is characterized by the precipitation of a composite phase in the aluminum matrix thereof.

Abstract: The object of the present invention is to provide a method for the manufacturing of a cutting material possessing excellent toughness and a high strength. The composition by weight of the Nickel alloy ingot, is chromium (Cr )14-23%, molybdenum (Mo) 14-20%, tungsten (W) 0.2-5%, iron (Fe) 0.2-7%, cobalt (Co) 0.2-2.5% with the remaining portion being made up of Ni and unavoidable impurities. After undergoing a solution heat treatment process, the Ni ingot undergoes plastic working, at a product ratio above 80%, followed by heating at a temperature of 500.degree.-600.degree. C. for longer than 30 minutes. Heating the alloy of the aforementioned composition at the above mentioned temperature promotes the precipitation of an intermetallic compound possessing a hardness greater than 57 on the HRC. The resulting superior cutting material is resistant to corrosion even when exposed to sea water.

Abstract: A rapidly solidified zirconium containing aluminum lithium alloy powder consisting essentially of the formula Al.sub.bal Li.sub.a Cu.sub.b Mg.sub.c Zr.sub.d where "a" ranges from 2.1 to 3.4 wt %, "b" ranges from about 0.5 to 2.0 wt %, "c" ranges from 0.2 to 2.0 wt % and "d" ranges from greater than about 0.6 to 1.8 wt %, the balance being aluminum. The powder is degassed in a vacuum at a temperature of at least about 450.degree. C. Components consolidated from the powder exhibit high tensile strength and elongation together with excellent notched impact toughness.

Abstract: The wear-resistant compound roll is constituted by a shell portion made of an iron-base alloy having the composition consisting essentially of 1.0-3.5 weight % of C, 3.0 weight % or less of Si, 1.5 weight % or less of Mn, 2-10 weight % of Cr, 9 weight % or less of Mo, 20 weight % or less of W, 2-15 weight % of V, 0.08 weight % or less of P, 0.06 weight % or less of S, 300 ppm or less of B, the balance being substantially Fe and inevitable impurities, and a shaft portion made of steel. The iron-base alloy of the shell portion has a structure containing by an area ratio 5-30 % of granular carbides and 5 % or less of non-granular carbides, an alloy matrix of the shell portion having a Vickers hardness (Hv) of 550 or more. This compound roll has excellent wear resistance and resistance to surface roughening.

Abstract: A method treating a surface of rotors in a screw-type rotary fluid machine, with the method comprising the steps of: conducting a non-electrolytic Ni plating on the surface of each rotor so as to form a first layer of non-electrolytic Ni plating layer; heating the rotor having the first layer at a temperature not lower than 500.degree. C.; and forming, at least, a second layer of an organic resin so as to cover the first layer.

Abstract: An Al-Li alloy consists essentially of the formula Al.sub.bal Li.sub.a Cu.sub.b Mg.sub.c Zr.sub.d wherein "a" ranges from about 1.9 to 3.4 wt %, "b" ranges from about 0.5 to 2.0 wt %, "c" ranges from 0.2 to 2.0 wt % and "d" ranges from about 0.3 to 1.2 wt %, the balance being aluminum. The alloy is solidified at a cooling rate of about 10.sup.3 .degree.-10.sup.4 .degree. C./sec by spray forming, and is characterized by a substantial absence of prior particle boundaries.

Abstract: A process for producing multipiece complementary tooling castings is disclosed in which hollow internal surfaces are cast in a mold having a soft, low strength sand core piece to define such hollow portions and external surfaces are cast against hard, resin-bonded sand mold surfaces. The castings are removed from their respective molds while still warm and nested and pressed together to bring their working surfaces into conformance with each other. The result of this practice is a set of tool pieces that require little machining and display high accuracy in their as-cast condition.

Abstract: An alloy product having improved combinations of strength, density, toughness and corrosion resistance, said alloy product consisting essentially of about 7.6 to 8.4% zinc, about 1.8 to 2.2% magnesium, about 2 to 2.6% copper and at least one element selected from zirconium, vanadium and hafnium present in a total amount not exceeding about 0.5%, preferably about 0.05 to 0.25% zirconium, the balance aluminum and incidential elements and impurities. The alloy product, suitable for aerospace applications, exhibits high yield strength, at least about 10% greater yield strength than its 7X50-T6 counterpart, with good toughness and corrosion resistance properties typically comparable to or better than those of its 7X50-T76 counterpart. Upper wing members made from this alloy typically have a yield strength over 84 ksi, good fracture toughness and an EXCO exfoliation resistance level of "EC" or better, typically "EB".

Abstract: A yellow dental alloy is disclosed with high gold content for castings and ceramic veneers with an adjusted thermal expansion coefficient that does not produce any undesirable discoloration of the ceramic veneers and that is very hard. It contains 70 to 85% by weight gold, 5 to 13% by weight silver, 2 to 9% by weight platinum, 0 to 4.5% by weight palladium, 0.05 to 1% by weight iridium, rhenium, rhodium and/or ruthenium, 2 to 8% by weight copper, 0.1 to 6% by weight indium, zinc and/or germanium, and 0 to 4% by weight gallium, iron and/or tungsten.

Abstract: The present invention relates to an aluminum alloy for fins of heat exchangers such as of automobile radiators and evaporators comprising 0.3 to 1.0% by weight of silicon, 0.3 to 3.0% by weight of iron, and the balance of aluminum and unavoidable impurities, which is readily workable for a fin (or readily corrugated), and is less deformed by brazing heat, and yet has improved thermal conductivity after the brazing.

Abstract: A cast hypereutectic Al-Si alloy with from 12-15% Si, having excellent wear resistance and machinability, improved fatigue strength and good levels of ambient and elevated temperature properties is provided, as well as a method of producing such alloy. The alloy and a melt used in the method contains Sr in excess of 0.10% and Ti in excess of 0.005%, the alloy further comprising: Cu 1.5 to 5.5%, Ni 1.0 to 3.00%, Mg 0.1 to 1.0%, Fe 0.1 to 1.0%, Mn 0.1 to 0.8%, Zr 0.01 to 0.1%, Zn 0 to 3.0%, Sn 0 to 0.2%, Pb 0 to 0.2%, Cr 0 to 0.1%, Na 0 to 0.01%, B (elemental) 0.05% maximum, Ca 0.003% maximum, P 0.003% maximum. Others 0.05 maximum each, the balance, apart from incidental impurities, being Al. The level of Sr in excess of 0.10% and Ti in excess of 0.

Abstract: A beta phase nickel aluminide microalloyed with iron having improved ductility. Nickel aluminide intermetallics alloyed with no more than about 0.5 atomic percent iron have significantly improved room temperature ductility over conventional unalloyed beta phase nickel aluminides or beta phase nickel aluminides alloyed with higher percentages of iron.

Abstract: A method for preparing decorative lacquered Ti-based articles is disclosed, which method comprises the steps of: (a) heating to 900.degree. to 1300.degree. in vacuum a base of titanium or its alloy whose surface serves as a base material, to grow the crystal grains on the surface of the base while simultaneously thermally etching the surface, so as to make the base surface uneven; (b) cooling the base; (c) etching the surface of the base with an etchant to enlarge the unevenness of the surface; (d) anodizing the base; (e) applying an undercoat onto the surface of the base; (f) optionally heating the undercoat to cure the same; and (g) further applying a coating onto the undercoat and then drying it. The method makes it possible to prepare decorative lacquered Ti-based articles having a Raden-, Hyomon- or Heidatsu, Kyushitsu- or Makie-like appearance utilizing titanium or its alloy as a base material.

Abstract: A method for induction heating and quench hardening of helical gears provides a hardness pattern uniformly distributed to a controlled depth across and between the teeth surfaces by means of axial scanning of the workpiece and uniform quenching. Uniform quenching is achieved by directing jets of quench fluid at the workpiece toothed surface at angles horizontally offset from the radial direction.