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公开(公告)号：WO2020106319A1
公开(公告)日：2020-05-28
申请号：PCT/US2019/027343
申请日：2019-04-12
Applicant: THE TIMKEN COMPANY
Inventor： PALADUGU, Mohan, Chand
Abstract: A heat treatment process for through hardening results in high surface compressive stresses. The method includes heating a steel component to a first temperature, quenching the steel component to a second temperature, maintaining the steel component at the second temperature for a first duration of time, heating the steel component to a third temperature, maintaining the steel component at the third temperature for a second duration of time, and quenching the steel component to a fourth temperature when austenite to martensite+bainite or bainite transformation is at least 10% but less than 85% complete.
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2.发明申请
公开(公告)号：WO2022154807A1
公开(公告)日：2022-07-21
申请号：PCT/US2021/013797
申请日：2021-01-18
Applicant: THE TIMKEN COMPANY
Inventor： PALADUGU, Mohan, Chand
Abstract: A heat treatment process for through hardening results in improved rolling contact fatigue (RCF) resistance. The method includes austenitizing a steel component, quenching the steel component to a first quench temperature below the martensite start temperature (Ms), holding the steel component at the first quench temperature for a duration of 0.5 hours to 8 hours, and quenching the steel component to a second quench temperature below 100 degrees C. The resulting component has a through hardness of at least 50 HRC, a retained austenite content of at least 10% to a depth of at least 1 mm from a surface of the steel component, residual tensile stresses to a depth of at least 1 mm from the surface of the steel component, and a microstructure of 5-30% bainite, 10-35% retained austenite, less than 7% carbides, and a remainder of martensite throughout a cross-section of the steel component.
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公开(公告)号：EP3884073A1
公开(公告)日：2021-09-29
申请号：EP19721456.2
申请日：2019-04-12
Applicant: The Timken Company
Inventor： PALADUGU, Mohan, Chand
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