Invention Grant
- Patent Title: Secondary-hardening gear steel
- Patent Title (中): 二次硬化齿轮钢
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Application No.: US12194964Application Date: 2008-08-20
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Publication No.: US08801872B2Publication Date: 2014-08-12
- Inventor: James A. Wright , Jason Sebastian
- Applicant: James A. Wright , Jason Sebastian
- Applicant Address: US IL Evanston
- Assignee: QuesTek Innovations, LLC
- Current Assignee: QuesTek Innovations, LLC
- Current Assignee Address: US IL Evanston
- Agency: Banner & Witcoff, Ltd.
- Main IPC: C23C8/22
- IPC: C23C8/22 ; C22C5/02 ; C22C38/08 ; C22C38/00 ; C23C8/32 ; C23C8/20 ; C22C38/12 ; C22C38/14 ; C22C38/22 ; C22C38/50 ; C22C38/46 ; C22C38/40 ; C22C38/30 ; C22C38/18 ; C21D1/22 ; C21D6/00 ; C22C38/52 ; C22C38/44 ; C21D6/02 ; C21D6/04 ; C21D9/32 ; C21D1/25
Abstract:
A case hardened gear steel having enhanced core fracture toughness includes by weight percent about 16.3Co, 7.5Ni, 3.5Cr, 1.75Mo, 0.2W, 0.11C, 0.03Ti, and 0.02V and the balance Fe, characterized as a predominantly lath martensitic microstructure essentially free of topologically close-packed (TCP) phases and carburized to include fine M2C carbides to provide a case hardness of at least about 62 HRC and a core toughness of at least about 50 ksi√in.
Public/Granted literature
- US20090199930A1 SECONDARY-HARDENING GEAR STEEL Public/Granted day:2009-08-13
Information query
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