- Patent Title: Method for low-pressure carburizing of a workpiece comprising steel
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Application No.: US15734542Application Date: 2019-06-05
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Publication No.: US11293087B2Publication Date: 2022-04-05
- Inventor: Bruno Petroix , André Marcarie
- Applicant: SAFRAN HELICOPTER ENGINES
- Applicant Address: FR Bordes
- Assignee: SAFRAN HELICOPTER ENGINES
- Current Assignee: SAFRAN HELICOPTER ENGINES
- Current Assignee Address: FR Bordes
- Agency: Christensen O'Connor Johnson Kindness PLLC
- Priority: FR1854876 20180605
- International Application: PCT/FR2019/051338 WO 20190605
- International Announcement: WO2019/234352 WO 20191212
- Main IPC: C23C8/22
- IPC: C23C8/22 ; C22C38/44 ; C22C38/46 ; C22C38/52 ; C23C8/80
Abstract:
A method for carburizing a steel workpiece includes implementing between 1 and 30 consecutive carburizing cycles, each carburizing cycle including injecting carburizing gas in such a way as to increase the surface carbon rate until a predetermined higher rate is reached, a step of injecting a neutral gas so as to decrease the surface carbon rate of the workpiece until it reaches a predetermined lower rate, followed by a second phase of injection of the neutral gas.
Public/Granted literature
- US20210230732A1 METHOD FOR LOW-PRESSURE CARBURIZING OF A WORKPIECE COMPRISING STEEL Public/Granted day:2021-07-29
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