Carpenter Technology Corporation

Crs Holdings, Inc.

Crs Holding Inc.

L. Klein Ag

Gregory J Del Corso

James W Martin

Pierre Marechal

David Esposito

Olivier Schiess

Robert S Brown

David L Strobel

Robert E Carnes

Theodore Kosa

Ning Ma

David E Wert

Michael L Schmidt

Leslie L Harner

Alberto O Polar-Rosas

Harrison A Garner, Jr

Patrick C Ray

David T Marlowe

E Lance Buck

William J Burns, Ii

Edward F Holland

Raymond A Reiter

Alberto Polar-Rosas

Pierre H Maréchal

A method of making a small diameter elongated steel article such as wire or strip is disclosed. The method includes the step of melting a steel alloy having the following weight percent composition and the balance is iron and usual impurities. The method includes melting the alloy, atomizing the molten alloy to make a pre-alloyed metal powder, consolidating the metal powder to substantially full density, and then hot working the consolidated metal powder to form an intermediate elongated article. The method further includes a multi-step heat treating process. A small diameter, elongated steel article having enhanced machinability is also disclosed.

Free-machining powder metallurgy steel articles and method of making same

A corrosion resistant, neutron absorbing, austenitic alloy powder is disclosed having the following composition in weight percent.  The alloy contains at least about 0.25% B, at least about 0.05% Gd, and the balance of the alloy composition is iron and usual impurities. Bis defined as % B+4.35&#xd7;(% Gd). An article of manufacture made from consolidated alloy powder is also disclosed which is characterized by a plurality of boride and gadolinide particles dispersed within a matrix. The boride and gadolinide particles are predominantly MB, MB, MX, and MX in form, where X is gadolinium or a combination of gadolinium and boron and M is one or more of the elements silicon, chromium, nickel, molybdenum, iron.

Processable high thermal neutron absorbing Fe-base alloy powder

A small diameter, elongated steel article, comprising fully consolidated, prealloyed metal powder is disclosed. The consolidated metal powder has a microstructure that has a substantially uniform distribution of fine grains having a grain size of not larger than about 9 when determined in accordance with ASTM Standard Specification E 112. The microstructure of the consolidated metal powder is further characterized by having a plurality of substantially spheroidal carbides uniformly distributed throughout the consolidated metal powder that are not greater than about 6 microns in major dimension and a plurality of sulfides uniformly distributed throughout the consolidated metal powder wherein the sulfides are not greater than about 2 microns in major dimension. A process for making the elongated steel article is also disclosed.

A tool steel alloy having a unique combination of hardness and toughness is disclosed. The alloy contains, in weight percent, about: wt. % C 1.85-2.30, Mn 0.15-1.0, Si 0.15-1.0, P 0.030 max., S 0-0.30, Cr 3.7-5.0, Ni&plus;Cu 0.75 max., Mo 1.0 max., Co 6-12, W 12.0-13.5, V 4.5-7.5. The balance is essentially iron and usual impurities. The elements C, Cr, Mo, W, and V are balanced in this alloy such that &minus;0.05&lE;&Dgr;C&lE;&minus;0.42 where &Dgr;C&equals;((0.033W)&plus;(0.063Mo)&plus;(0.06Cr)&plus;(0.2V))&minus;C. A powder metallurgy tool steel article made from consolidated alloy powder having the aforesaid weight percent composition provides a Rockwell C hardness of at least about 69.5 when heat treated.

High-hardness powder metallurgy tool steel and article made therefrom

High-strength, titanium-bearing, powder metallurgy stainless steel article with enhanced machinability

A powder metallurgy article formed from a Co--Cr--Mo alloy powder and a method for making the article are disclosed. The Co--Cr--Mo alloy powder contains, in weight percent, about 0.35% max. C, about 1.00% max. Mn, about 1.00% max. Si, about 26.0-30.0% Cr, about 5.0-7.0% Mo, about 3% max. Ni, about 0.25% max. N, about 1.00% max. Fe, about 0.01% max. of oxide forming metals, and the balance is essentially Co. Within their respective weight percent limits C and N are controlled such that they satisfy the relationship:

Co-Cr-Mo powder metallurgy articles and process for their manufacture

In a process for making a low thermal expansion, high thermal conductivity member or article suitable for bonding to a support member at a predetermined bonding temperature and for facilitating heat transfer therefrom, and in the member made thereby, first and second metal powders are combined in volumetric proportions to provide an approximation to desired thermal expansion and thermal conductivity characteristics. The powder mixture is then consolidated in a controlled manner to provide a shaped member having a thermal expansion characteristic curve that essentially matches that of the support member from about 30.degree. C. up to the bonding temperature. Consolidation of the metal powder mixture is controlled by selecting a density for the consolidated powder that results in the close expansion match over the temperature range and then consolidating the metal powder mixture to that density.

Method of making a low thermal expansion, high thermal conductivity,

A process for making a clad article of a densified metal powder core and a compatible metal cladding metallurgically bonded thereto results in a significantly reduced concentration of metal oxides in the core so as to prevent embrittlement of the core at and adjacent the core/cladding interface that results in rupture between the core and the cladding along the interface during working or forming. In carrying out the process, the temperature of the undensified metal powder and/or the temperature of the compatible metal container into which the metal powder is filled are closely controlled so as to avoid adsorption of moisture during the filling step.

Process for making clad articles and article made thereby

A workable, boron-containing, stainless steel alloy and an article formed therefrom are disclosed together with a process for manufacturing same. The alloy consists essentially of, in weight percent, about

Workable boron-containing stainless steel alloy article, a mechanically

A method of manufacturing a flat form from blended metallic powder including a major constituent by weight having a high melting point and a minor constituent by weiht having a substantially lower melting point includes selection of the powder to provide continuous and reproducible compacted flat forms. Powder is selected on the basis of compressibility and flowability. The selected powder is compacted to a flat green form and then liquid phase sintered. The flat form may be stacked to provide a flat article of a desired thickness which will result in a monolithic or composite cross section when subsequently sintered. Liquid phase sintering is carried out in a manner designed to avoid undesirable embrittlement and to provide a uniform microstructure in the fully consolidated article. The process is especially useful in the production of tungsten heavy alloy plate.

Method of manufacturing flat forms from metal powder and product formed

A powder metallurgy consolidation process and apparatus for carrying out said process produces integral metal bodies by heating metal powder of a predetermined composition to a temperature sufficient to cause solid state interparticle bonding, while simultaneously maintaining a reactive fluid in contact with the metal powder. The metal powder is compacted to a density greater than 90% of the full theoretical density of the composition after the reactive fluid has been removed. The reactive fluid is selected to modify the powder particle surface chemistry in order to improve bondability and to obtain other properties as desired. Metal bodies which have been consolidated by the process are sufficiently dense to be mechanically hot worked and exhibit exceptionally low retained gas content.

Process and apparatus to simultaneously consolidate and reduce metal

A nozzle assembly for atomizing a stream of molten metal includes a refractory metal-transmitting nozzle having a short metering orifice at its entrance end and a relatively long divergent discharge passage terminating at a flat annular land formed at the bottom end of the metal-transmitting nozzle. The metal-transmitting nozzle is seated in an opening in the bottom of a tundish or other source of molten metal with its upper end containing its metering orifice projecting into the molten metal reservoir. The lower-end portion projects from the bottom of the tundish and through the central portion of an atomizing fluid nozzle assembly in which it seats. The central portion of the atomizing fluid nozzle assembly projects below the bottom member of the atomizing fluid nozzle assembly and forms an atomizing fluid orifice therewith. The process of utilizing the apparatus for atomizing powder is described in which a molten metal film is formed around the outer bottom portion of the metal-transmitting nozzle which extends below the central portion and orifice of the atomizing fluid nozzle assembly.

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Reading, PA, United States of America

Gregory J Del Corso