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Patent Searching and Data


Title:
DEEPLY CARBURIZED LOW OR MEDIUM CARBONS STEELS
Document Type and Number:
WIPO Patent Application WO/2011/022463
Kind Code:
A3
Abstract:
A new process for forming deeply carburized, case-hardened low- to medium-carbon steel for use in high wear, high toughness applications. The process involves subjecting the steel to a carburizing heat treatment, then subjecting the carburized steel to a deep hardening stage to produce a hard case. Carburizing such steels in the past has led to surface cracking, but here, the deep hard case creates compressive stresses at the surface and prevents cracking.

Inventors:
MEYER ROBERT L (US)
KEIL GARY D (US)
JOHNSTON SCOTT A (US)
RAGER STEVE A (US)
JOHNSON MICHAEL L (US)
Application Number:
PCT/US2010/045862
Publication Date:
June 09, 2011
Filing Date:
August 18, 2010
Export Citation:
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Assignee:
CATERPILLAR INC (US)
MEYER ROBERT L (US)
KEIL GARY D (US)
JOHNSTON SCOTT A (US)
RAGER STEVE A (US)
JOHNSON MICHAEL L (US)
International Classes:
C23C8/46; C21D1/06; C21D9/00; C23C8/22; C23C8/66
Foreign References:
JP2544160B21996-10-16
JP2006097096A2006-04-13
US20080006347A12008-01-10
US20050133120A12005-06-23
Attorney, Agent or Firm:
ROBERTS, David, E. et al. (Peoria, IL, US)
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