Abstract:
An iron or copper based metal powder useful for plasma deposition of a coating that has a dry coefficient of friction .75 or less and readily conducts heat through the coating. The powder comprises (a) H2O atomised and annealed particles consisting essentially of (by weight) carbon .15-.85%, oxygen .1-.45%, an air hardening agent selected from manganese and nickel of .1-6.5%, and the remainder iron or copper, with at least 90% of the particles having oxygen and iron or copper combined in the lowest atomic oxygen form for an oxide of such metal. A method of making anti-friction iron powder that is economical, selectively produces FeO and promotes fine flowable particles. The method comprises (a) steam atomisation of a molten steel that excludes other oxygen, the steel containing carbon up to .4% by weight to produce a collection of comminuted particles, and (b) annealing the particles in an air atmosphere for a period of time of .25-2.0 hours in a temperature range of 427-760 DEG C (800 DEG -1400 DEG F) to reduce carbon in the particles to about .2% or sponge iron by reducing Fe3O4 or Fe2O3 in CO and (H2O steam) to attain nearly all iron with nearly all FeO and 0.1 to 0.85 C.
Abstract:
Alloy steel powders capable of obtaining high strength in a sintered state and having excellent compacting compressibility and methods of manufacturing a sintered body. The alloy steel powder comprises, by wt%, about 0.5 - 2% of Cr, not greater than about 0.08% of Mn, about 0.1 - 0.6% of Mo, about 0.05 - 0.5% of V, not greater than about 0.015 of S, not greater than about 0.2% of O, and the balance being Fe and incidental impurities. The alloy steel powder is compacted and sintered at a temperature at about 1100 - 1300°C and then cooled at a cooling rate no higher than about 1°C/s in a temperature range of from about 800°C to 400°C. The alloy steel powder can contain Nb and/or Ti and one or more of Co, W and B. Additionally, Ni powder and/or Cu powder may be adhered and dispersed onto the surface of the alloy steel powder.
Abstract:
The invention relates generally to aluminum containing iron-base alloys useful as electrical resistance heating elements. The aluminum containing iron-base alloys have an entirely ferritic microstructure and a room temperature electrical resistivity of 80 - 400 µΩ.cm. The alloy includes, in weight%, from 14-32% Al, up to 1% Cr and from 0.05 to 1.0% Zr, balance Fe. It can further also include up to 2% Mo, up to 2% Ti, up to 2% Si, up to 30% Ni, up to 0.5% Y, up to 0.1% B, up to1% Nb, up to 1% Ta, up to 3% Cu and up to 30% oxide dispersoid particles.
Title translation:PORÖSERMETALLISCHERKÖRPER麻省理工学院HÖHERSPEZIFISCHEROBERFLÄCHE,VERFAHREN ZU DESSEN HERSTELLUNG,PORÖSESMETALLISCHES材料UND ELEKTRODEFÜRALKALISCHESEKUNDÄRBATTERIE
Abstract:
A porous metallic body that has a three-dimensional reticular skeleton structure wholly constituted of a powdery metallic sinter with a porosity of 10-60 % and that has a total porosity of 80-99 %. The specific surface are thereof is as large as, for example, 300-11,000 cm2/cm3. This body can be reinforced with reinforcing plates and is suitable as an electrode of an alkaline secondary battery capable of attaining a long service life and a large capacity of active materials which can be contained. The metallic body is produced by molding a foamable slurry containing a metallic powder, drying the molded slurry preferably after foaming, and sintering the same.
Abstract translation:具有三维网状骨架结构的多孔金属体,其整体由孔隙率为10-60%的粉末状金属烧结体构成,总孔隙率为80-99%。 其比表面大到例如300-11,000cm 2 / cm 3。 该主体可以用增强板增强,并且适合作为能够获得长使用寿命和可容纳的大容量活性材料的碱性二次电池的电极。 金属体通过将含有金属粉末的发泡性浆料成型而制造,优选在发泡后干燥成型后的浆料并进行烧结。
Abstract:
The invention relates generally to aluminum containing iron-base alloys useful as electrical resistance heating elements. The aluminum containing iron-base alloys have a disordered body centered cubic structure and improved room temperature ductility, electrical resistivity, cyclic fatigue resistance, high temperature oxidation resistance, low and high temperature strength, and/or resistance to high temperature sagging. The alloy has an entirely ferritic microstructure which is free of austenite and includes, in weight%, 4 to 9.5% Al, 0.2-2.0% Ti, 0.5-2% Mo, 0.1 to 0.8% Zr, 0.01-0.5% C, balance Fe.