Victor Yu Levin

US Patent:

6635128, Oct 21, 2003

Filed:

Nov 28, 1994

Appl. No.:

08/345206

Inventors:

William Neumann - Lakewood OH
Roger R. Wills - Solon OH
Mohan Kurup - Richmond Hts. OH
Victor Levin - South Euclid OH

Assignee:

TRW Inc. - Lyndhurst OH

International Classification:

C22C 3844

US Classification:

148325, 148605

Abstract:

A work-hardened poppet exhaust valve for internal combustion engines is obtained from a solutioned work-hardenable austenitic stainless steel coil or bar stock in which chromium is present in the range of 13%-25% by weight, nickel is present in the range of 4%-16% by weight, manganese is present in the range of 0. 25%-8% by weight, copper is present in the range of 0. 5%-7% by weight, the interstitial elements carbon plus nitrogen are present in a total amount less than 0. 45% by nitrogen are present in a total amount less than 0. 45% by weight, and at least one refractory metal selected from the group consisting of molybdenum, niobium, vanadium, tungsten and tantalum is present in the range of 1%-5% by weight. The coil or bar stock is extruded to a poppet valve preform configuration at a temperature in the range of room temperature to 1,000Â F. , and at a true strain of more than 0. 8.

US Patent:

7682471, Mar 23, 2010

Filed:

Jul 10, 2006

Appl. No.:

11/483882

Inventors:

Victor D. Levin - Highland Heights OH, US

Assignee:

TRW Automotive U.S. LLC - Livonia MI

International Classification:

B32B 15/01
C22C 38/00
C22C 38/18
B23K 9/00
B23K 9/02
C22C 38/58

US Classification:

148516, 148325, 148327, 21912146, 420 56, 420 64

Abstract:

The method of forming hard facing on an engine valve comprising providing an engine valve, providing an austenitic iron-based alloy, the austenitic iron-based alloy including, by weight, about 0. 25% to about 0. 9% carbon, about 1. 5% to about 3. 5% boron, about 1% to about 2% silicon, at least 20% chromium, an amount of manganese effective to provide the iron-based alloy with an austenitic structure, and the balance including iron and incidental impurities, and welding the austenitic iron-based alloy to at least a portion of the engine valve.

US Patent:

58231587, Oct 20, 1998

Filed:

Oct 16, 1997

Appl. No.:

8/950103

Inventors:

Rudy J. Heimann - Brunswick OH
Victor D. Levin - Highland Heights OH
William Neumann - Lakewood OH
Joseph L. Palko - Strongsville OH
Robert E. Southam - Hudson OH

Assignee:

TRW Inc. - Lyndhurst OH

International Classification:

F02M 300

US Classification:

1231883

Abstract:

A first part of an engine valve (10) is centered on an axis (A) and comprises a hollow metal member (100) having an outwardly flared first end portion (102) and a second end portion (104). The hollow metal member (100) has a chamber (106) extending axially throughout the member. The chamber (106) is open at the first end portion (102). A second part of the engine valve (10) is centered on the axis (A) and comprises a metal piece (130) coaxial with the hollow metal member (100). The metal piece (130) has first and second ends (132 and 134). The first end (132) has a first weld connection to the second end portion (104) of the hollow metal member (100). The metal piece (130) has a solid cross-section portion between the first and second ends (132 and 134). The metal piece (130) has a circumferential groove (150) in the solid cross-section portion. A metal cap (160) has a periphery (166) and a second weld connection (172) at the periphery to the outwardly flared first end portion (104) of the hollow metal member (100).

US Patent:

52574539, Nov 2, 1993

Filed:

Jul 8, 1992

Appl. No.:

7/910681

Inventors:

William Neumann - Lakewood OH
Roger R. Wills - Solon OH
Mohan Kurup - Richmond Hts. OH
Victor Levin - South Euclid OH

Assignee:

TRW Inc. - Lyndhurst OH

International Classification:

B21D 5300

US Classification:

298884

Abstract:

A method of making work-hardened poppet exhaust valves for internal combustion engines comprises the steps of: providing a solutioned work-hardenable austenitic stainless steel coil or bar stock in which chromium is present in the range of 13%-25% by weight, nickel is present in the range of 4%-16% by weight, manganese is present in the range of 0. 25%-8% by weight, copper is present in the range of 0. 5%-7% by weight, the interstitial elements carbon plus nitrogen are present in a total amount less than 0. 45% by weight, and at least one refractory metal selected from the group consisting of molybdenum, niobium, vanadium, tungsten and tantalum is present in the range of 1%-5% by weight; extruding the coil stock to a poppet valve preform configuration at a speed in the range of 60 to 100 strokes per minute and at a temperature in the range of room temperature to 1,000. degree. F. ; and heading the preform at the same speed while maintaining the head of the preform at a temperature in the range of room temperature to 2,200. degree. ; the parameters of extrusion providing the work-hardened poppet valve with a stem hardness more than R. sub. c =25.