Walter T Haswell

US Patent:

46095268, Sep 2, 1986

Filed:

May 14, 1984

Appl. No.:

6/609959

Inventors:

Walter T. Haswell - Jamesville NY
Charles F. Yolton - Coraopolis PA

Assignee:

Crucible Materials Corporation - Pittsburgh PA

International Classification:

B22F 100

US Classification:

419 23

Abstract:

A method for producing high speed, tool and die steel articles from prealloyed powders. The method comprises placing particles of a prealloyed steel composition from which the article is to be made in a deformable container, heating the container and particles and then passing the heated container through a forging box having a plurality of hammers evenly spaced around the container and adapted to extend and retract radially to impart a radial forging action to the container. The forging action is of a magnitude and duration to compact the particles to an essentially fully dense article. Preferably, there are four hammers arranged in two pairs with the hammer of each pair being opposed and adapted to extend and retract in unison.

US Patent:

60997966, Aug 8, 2000

Filed:

Aug 13, 1999

Appl. No.:

9/374044

Inventors:

William B. Eisen - Pittsburgh PA
Walter Haswell - Jamesville NY
Kenneth J. Wojslaw - Syracuse NY
Jeryl K. Wright - Camillus NY

Assignee:

Crucible Materials Corp. - Syracuse NY

International Classification:

B22F 316

US Classification:

419 54

Abstract:

A method for producing compacted, fully dense articles from atomized tool steel alloy particles by placing the particles in a deformable container, and isostatically pressing the particles at an elevated temperature to produce a precompact having an intermediate density. The precompact is heated to a temperature above the elevated temperature used to produce the precompact. The precompact is isostatically pressed to produce the fully-dense article.

US Patent:

59764597, Nov 2, 1999

Filed:

Jan 6, 1998

Appl. No.:

9/003368

Inventors:

William B. Eisen - Pittsburgh PA
Walter Haswell - Jamesville NY
Kenneth J. Wojslaw - Syracuse NY
Jeryl K. Wright - Camillus NY

Assignee:

Crucible Materials Corporation - Syracuse NY

International Classification:

B22F 314
B22F 316

US Classification:

419 49

Abstract:

A method for producing compacted, fully dense articles from atomized tool steel alloy particles by placing the particles in an evacuated, deformable container, and isostatically pressing the particles at an elevated temperature to produce a precompact having an intermediate density. The precompact is heated to a temperature above the elevated temperature used to produce the precompact. The precompact is isostatically pressed to produce the fully-dense article.

US Patent:

49331426, Jun 12, 1990

Filed:

Feb 3, 1989

Appl. No.:

7/306216

Inventors:

Walter T. Haswell - Jamesville NY
Kenneth E. Pinnow - Pittsburgh PA
John J. Eckenrod - Coraopolis PA
Geoffrey O. Rhodes - Saxonburg PA

Assignee:

Crucible Materials Corporation - Pittsburgh PA

International Classification:

C22C 3840
C22C 3860

US Classification:

420 42

Abstract:

A low carbon plus nitrogen, free-machining, austenitic stainless steel having improved machinability and excellent corrosion resistance. The steel composition in weight percent is carbon plus nitrogen up to about 0. 06, chromium 16 to 20, nickel 6 to 14, manganese up to 0. 60, sulfur 0. 15 to 0. 50, silicon up to about 1, phosphorus up to about 0. 20, molybdenum up to about 1 and balance iron.

US Patent:

42760879, Jun 30, 1981

Filed:

May 3, 1979

Appl. No.:

6/035652

Inventors:

Walter T. Haswell - Jamesville NY
William Stasko - Munhall PA
F. Robert Dax - Pittsburgh PA

Assignee:

Crucible Inc. - Pittsburgh PA

International Classification:

C22C 104

US Classification:

75243

Abstract:

A powder-metallurgy produced, vanadium-containing, tungsten-type high-speed steel wherein hardness at elevated temperature is achieved without resorting to conventional, high cobalt contents. This is achieved by providing a critical amount of tungsten and/or molybdenum above that conventionally used in combination with vanadium and carbon in an amount sufficient to combine with the vanadium present and with an excess carbon to provide matrix strengthening. The high hardness and wear resistance at elevated temperature is imparted to the steel by the carbides of vanadium, tungsten and/or molybdenum. Columbium may be substituted for a portion of the vanadium.

US Patent:

46408142, Feb 3, 1987

Filed:

Oct 17, 1985

Appl. No.:

6/788413

Inventors:

Walter T. Haswell - Jamesville NY
Karl S. Brosius - Burgettstown PA
Scott B. Justus - Wexford PA
David A. Salvatora - Gibsonia PA

Assignee:

Crucible Materials Corporation - Pittsburgh PA

International Classification:

B22F 700

US Classification:

419 8

Abstract:

A powder-metallurgy method for producing tubular product having at least one surface and preferably an internal surface thereof clad with an alloy different from and preferably more resistant to destructive media than the material from which the remainder of the tubing is constructed. An assembly is constructed of a metal tubing having an internal surface to be clad and a tubular insert mounted generally axially within the tubing in spaced-apart relation to the internal surface thereof, which provides a generally annular cavity between the internal surface of the tubing and the tubular insert. This cavity is filled with metal particles of a composition to be clad on the tubing internal surface. The cavity is sealed and the assembly is heated to an elevated temperature at which it is forged to compact the metal particles introduced to the cavity to substantially full density and metallurgically bond the particles to the internal surface of the tubing to provide a desired destructive-media resistant cladding. The forging operation includes passing the assembly along a feed path having an axis through a forging box having a plurality of hammers evenly spaced around the assembly.

US Patent:

47692138, Sep 6, 1988

Filed:

Aug 21, 1986

Appl. No.:

6/898487

Inventors:

Walter T. Haswell - Jamesville NY
Kenneth E. Pinnow - Pittsburgh PA
Geoffrey O. Rhodes - Saxonburg PA
John J. Eckenrod - Coraopolis PA

Assignee:

Crucible Materials Corporation - Pittsburgh PA

International Classification:

C22C 3820

US Classification:

420 61

Abstract:

A chromium-nickel-copper, age-hardenable martensitic stainless steel having improved machinability in the solution-treated and also in the age-hardened condition. The steel has carbon plus nitrogen up to 0. 08%, preferably 0. 05 or 0. 035% for purposes of improved machinability.

US Patent:

42499453, Feb 10, 1981

Filed:

Sep 20, 1978

Appl. No.:

5/944514

Inventors:

Walter T. Haswell - Jamesville NY
August Kasak - Pittsburgh PA

Assignee:

Crucible Inc. - Pittsburgh PA

International Classification:

B22F 500

US Classification:

75241

Abstract:

A powder metallurgy tool steel article for use in applications requiring high wear resistance having a carbide content of 10 to 18 volume percent of substantially all MC-type vanadium carbides, which carbides are substantially spherical and uniformly dispersed; the carbon content of the article is balanced relative to the carbide formers vanadium, chromium and molybdenum to provide an amount of carbon in the matrix of the article sufficient to permit the article to be heat treated to a hardness of at least 56 R. sub. c.