Invention Grant
- Patent Title: Preparing method of engine valve
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Application No.: US16806679Application Date: 2020-03-02
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Publication No.: US11597981B2Publication Date: 2023-03-07
- Inventor: Sung Hwan Park
- Applicant: Hyundai Motor Company , Kia Motors Corporation
- Applicant Address: KR Seoul; KR Seoul
- Assignee: Hyundai Motor Company,Kia Motors Corporation
- Current Assignee: Hyundai Motor Company,Kia Motors Corporation
- Current Assignee Address: KR Seoul; KR Seoul
- Agency: Fox Rothschild LLP
- Priority: KR10-2019-0161997 20191206
- Main IPC: C21D10/00
- IPC: C21D10/00 ; C21D8/00 ; B21D31/06 ; B21D53/10 ; F01L3/02
Abstract:
A method of preparing an engine valve is provided. The method includes hot forging a heat resistant steel at 1,150 to 1,250° C. to mold a valve, aging the molded valve and hollowed-out processing the aging valve. Additionally, the method includes nitride-heating the hollow valve and grinding a surface of a neck of the nitride-heated valve to remove a nitride layer.
Public/Granted literature
- US20210172034A1 PREPARING METHOD OF ENGINE VALVE Public/Granted day:2021-06-10
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