[특허]Process for carbonitriding steel

[미국특허] Process for carbonitriding steel 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	C22C-038/12
출원번호	US-0247315 (1994-05-23)
우선권정보	NL-0000901 (1993-05-26)
발명자 / 주소	Beswick Johan M. (Montfoort NLX) Kerrigan Adian M. (Utrecht NLX) Slycke Jan T. (Bilthoven NLX) Vollmer Terence T. (Vianen NLX)
출원인 / 주소	SKF Industrial Trading & Development Company, B.V. (Nieuwegein NLX 03)
인용정보	피인용 횟수 : 25 인용 특허 : 0

초록 ▼

Process for carbonitriding a steel comprising: 0.75-1.1% by weight of C; up to 1.0% by weight of Si; less than 0.015% by weight of P; up to 0.5% by weight of Mo; up to 1.2% by weight of Mn; 0.5-2% by weight of Cr, the remainder being Fe, by exposing it at elevated temperatures to an atmosphere comprising at least carbon monoxide, hydrogen, nitrogen and added ammonia. This is carried out by exposing it, between 780°and 900°C., for from 1 to 10 hours, to an atmosphere comprising at least carbon monoxide, hydrogen and ammonia with a carbon activity between 0.90 and 1.10 and a nitrogen potential between 0.10 and 0.60% N.

대표청구항 ▼

A process for carbonitriding a steel comprising: 0.75-1.1% by weight of C; up to 1.0% by weight of Si; less than 0.015% by weight of P; up to 0.5% by weight of Mo; up to 1.2% by weight of Mn; 0.5-2% by weight of Cr; the remainder being Fe, by exposing it to an atmosphere comprising 17-25% by volume of carbon monoxide, 30-45% by volume of hydrogen, 1-10% by volume of ammonia, for from 1 to 10 hours, at a temperature between 780°and 900°C., wherein the composition of the atmosphere is such that the carbon activity (%) is between 0.90 and 1.10 and that a nitrogen potential Npot in balance with the atmosphere results, measured directly on the surface, of 0.1-0.6% by weight of N.

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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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[미국특허] Process for carbonitriding steel 원문보기