Metal treatment – Process of modifying or maintaining internal physical... – Carburizing or nitriding using externally supplied carbon or...
Reexamination Certificate
2007-01-30
2007-01-30
King, Roy (Department: 1742)
Metal treatment
Process of modifying or maintaining internal physical...
Carburizing or nitriding using externally supplied carbon or...
Reexamination Certificate
active
10745107
ABSTRACT:
An article and method for forming an article having a hard-finished surface including a predetermined density of carbides to improve pitting and wear resistance and to significantly increase the overall life of the article. This method comprises selecting a carburizing grade material to form an article, carburizing the article to form a microstructure on at least one portion of the article having a predetermined density of carbides dispersed in the microstructure to a predetermined depth, quenching the article to form a hardened matrix dispersed with carbides and hard finishing the article to form the surface, the surface having at least approximately 20% by volume fraction carbides dispersed in the hardened matrix.
REFERENCES:
patent: 3398444 (1968-08-01), Nemy
patent: 3895972 (1975-07-01), Woodilla, Jr. et al.
patent: 4202710 (1980-05-01), Naito et al.
patent: 4373973 (1983-02-01), Cellitti et al.
patent: 4761867 (1988-08-01), Vollmer et al.
patent: 4921025 (1990-05-01), Tipton et al.
patent: 5181375 (1993-01-01), Thurman et al.
patent: 5536335 (1996-07-01), Burris et al.
patent: 5595613 (1997-01-01), Hatano et al.
patent: 5656106 (1997-08-01), Amateau et al.
patent: 5910223 (1999-06-01), Tipton et al.
patent: 6019857 (2000-02-01), Mutagami
patent: 6059898 (2000-05-01), Fisher et al.
patent: 6258179 (2001-07-01), Takayama et al.
patent: 6488788 (2002-12-01), Ito et al.
patent: 6537390 (2003-03-01), Goto
patent: 6589363 (2003-07-01), Rohde et al.
patent: 2002/0179205 (2002-12-01), Ohbayashi et al.
patent: 0033403 (1981-08-01), None
patent: 0950723 (1999-10-01), None
patent: 1070760 (2001-01-01), None
patent: 1099869 (2001-05-01), None
patent: 57-177864 (1982-11-01), None
patent: 04-032548 (1992-02-01), None
patent: 11-300528 (1999-11-01), None
patent: WO 89/05865 (1989-06-01), None
patent: WO 00/77265 (2000-12-01), None
Davis et al., ASM Handbook, 1995, ASM International, vol. 4, p. 376.
Patent Abst of JP vol. 1995 #03, Apr. 28, 1995 & JP 06340921; Kawasaki Heavy Ind Ltd.
Patent Abst of JP vol. 8 #122 (C-227), Jun. 8, 1984 & JP 59035630 Komatsu, Feb. 27, 1984.
Patent Abst of JP vol. 13 #504 (C-653), Nov. 12, 1989 & JP 01201459 Daido Steel Co Ltd.
Patent Abst of JP vol. 14 #314 (C-0737) Jul. 5, 1990 & JP 02107755 Koyo Seiko Co Ltd Apr. 19, 1990.
Patent Abst of JP vol. 15 #68 (C-0807) Feb. 18, 1991 & JP 02294462 Mazda Motor Corp Dec. 5, 1990.
Patent Abst of JP vol. 1996 #09 Sep. 30, 1996 & JP 08134623 Kobe Steel; Nippon Koshuha Kogyo KK May 28, 1996.
Patent Abst of JP vol. 010 #287 (C-375) Sep. 30, 1986 & JP 61104065 Daido Steel Co Ltd May 22, 1986.
Patent Abst of JP vol. 1999 #12 Oct. 29, 1999 & JP 11199983 Nissan Motor Co Ltd; Daido Steel Co Ltd Jul. 27, 1999.
Patent Abst of JP vol. 16 #310 (C-0960) Jul. 8, 1992 & JP 04088148 Kobe Steel Ltd Mar. 23, 1992.
Patent Abst of JP May 30, 1990 & JP 04032548 Nissan Motor Co Feb. 4, 2002.
Patent Abst of JP vol. 16 #244 (C-0947) Jun. 4, 1992 & JP 04052265 Daido Steel Co Ltd Feb. 20, 1992.
“Application of Super Carburizing to Hydraulic Lash Adjuster”, Namiki et al., Copyright 1988 Society of Automotive Engineers, Inc.
“Development of Supercarburized Tappet Shim to Improve Fuel Economy”, Ahn et al., Copyright 2000 Society of Automotive Engineers, Inc.
“Heat Treatments to Improve the Rolling-Contact Fatigue Life for Crank Pin of Motorcycles”, Yamagata et al., Copyright 2003 SAE International.
Berndt Charles F.
Clements Thomas E.
Cross Steven M.
Hoefft Timothy M.
Keil Gary D.
Alexander Michael P.
Caterpillar Inc
Earle Kevin C.
King Roy
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