[특허]Cost-effective ferritic stainless steel

Cost-effective ferritic stainless steel 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	C22C-038/20 C22C-038/42 C22C-038/44 C22C-038/50 C22C-038/00 C22C-038/02 C22C-038/04 C22C-038/48 C21D-006/00
출원번호	US-0855439 (2013-04-02)
등록번호	US-9816163 (2017-11-14)
발명자 / 주소	Douthett, Joseph A. Craycraft, Shannon K.
출원인 / 주소	AK Steel Properties, Inc.
대리인 / 주소	Frost Brown Todd LLC
인용정보	피인용 횟수 : 0 인용 특허 : 107

초록

A cost effective ferritic stainless steel exhibits improved corrosion resistance comparable to that observed on Type 304L steel. The ferritic stainless steel is substantially nickel-free, dual stabilized with titanium and columbium, and contains chromium, copper, and molybdenum.

대표청구항 ▼

1. A ferritic stainless steel consisting essentially of: about 0.020 or less percent by weight carbon;about 20.0-23.0 percent by weight chromium;about 0.020 or less percent by weight nitrogen;about 0.40-0.80 percent by weight copper;about 0.20-0.60 percent by weight molybdenum;about 0.10-0.25 percent by weight titanium;about 0.20-0.30 percent by weight columbium,optionally one or more members selected from the group consisting of 0.50 or less percent by weight manganese, 0.030 or less percent by weight phosphorus, 0.30-0.50 percent by weight silicon, and 0.040 or less percent by weight nickel, andthe balance consisting of iron and unavoidable impurities. 2. The ferritic stainless steel of claim 1 wherein the chromium is present in an amount of about 21.5-22 percent by weight. 3. The ferritic stainless steel of claim 1 wherein the copper is present in an amount of about 0.45-0.75 percent by weight. 4. The ferritic stainless steel of claim 1 wherein the molybdenum is present in an amount of about 0.30-0.50 percent by weight. 5. The ferritic stainless steel of claim 1 wherein the titanium is present in an amount of about 0.17-0.25 percent by weight. 6. The ferritic stainless steel of claim 1 wherein the chromium is present in an amount of about 21.75 percent by weight. 7. The ferritic stainless steel of claim 1 wherein the copper is present in an amount of about 0.60 percent by weight. 8. The ferritic stainless steel of claim 1 wherein the molybdenum is present in an amount of about 0.40 percent by weight. 9. The ferritic stainless steel of claim 1 wherein the titanium is present in an amount of about 0.21 percent by weight. 10. The ferritic stainless steel of claim 1 wherein the columbium is present in an amount of about 0.25 percent by weight. 11. The ferritic stainless steel of claim 1 further consisting essentially of about 0.30-0.50 percent by weight manganese. 12. The ferritic stainless steel of claim 1 further consisting essentially of one or more members selected from the group consisting of 0.40 or less percent by weight manganese, 0.030 or less percent by weight phosphorus, 0.30-0.50 percent by weight silicon, and 0.040 or less percent by weight nickel. 13. The ferritic stainless steel of claim 1, wherein the concentrations of chromium and molybdenum satisfy Equation 1: 20.5≦Cr+3.3Mo Equation 1:wherein Cr is the concentration of chromium by percent weight, and Mo is the concentration of molybdenum by percent weight. 14. The ferritic stainless steel of claim 1, wherein the concentrations of copper and molybdenum satisfy Equation 2: 0.6≦Cu+Mo≦1.4 when Cumax<0.80 Equation 2:wherein Cu is the concentration of copper by percent weight, wherein Mo is the concentration of molybdenum by percent weight, wherein Cumax is the maximum concentration of copper by percent weight. 15. The ferritic stainless steel of claim 1, wherein the concentration of titanium satisfies Equations 3 and 4: Timax=0.0044(N−1.027) Equation 3:wherein Timax is that maximum concentration of titanium by percent weight, wherein N is the concentration of nitrogen by percent weight; and Timin=0.0025/N Equation 4:wherein Timin is the minimum concentration of titanium by percent weight, wherein N is the concentration of nitrogen by percent weight. 16. A ferritic stainless steel comprising: about 0.020 or less percent by weight carbon;about 20.0-23.0 percent by weight chromium;about 0.020 or less percent by weight nitrogen;about 0.40-0.80 percent by weight copper;about 0.20-0.60 percent by weight molybdenum;about 0.10-0.25 percent by weight titanium; andabout 0.20-0.30 percent by weight columbium,wherein the concentrations of chromium and molybdenum satisfy Equation 1: 20.5≦Cr+3.3Mo Equation 1:wherein Cr is the concentration of chromium by percent weight, and Mo is the concentration of molybdenum by percent weight,wherein the concentrations of copper and molybdenum satisfy Equation 2: 0.6≦Cu+Mo≦1.4 when Cumax<0.80 Equation 2:wherein Cu is the concentration of copper by percent weight, wherein Mo is the concentration of molybdenum by percent weight, wherein Cumax is the maximum concentration of copper by percent weight,wherein the concentration of titanium satisfies Equations 3 and 4: Timax=0.0044(N-1.027) Equation 3:wherein Timax is that maximum concentration of titanium by percent weight, wherein N is the concentration of nitrogen by percent weight; and Timin=0.0025/N Equation 4:wherein Timin is the minimum concentration of titanium by percent weight, wherein N is the concentration of nitrogen by percent weight.

이 특허에 인용된 특허 (107)

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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

내보내기 구분	파일저장 인쇄 메일전송
구성항목	기본정보 상세정보 관리번호, 국가코드, 자료구분, 상태, 출원번호, 출원일자, 공개번호, 공개일자, 등록번호, 등록일자, 발명명칭(한글), 발명명칭(영문), 출원인(한글), 출원인(영문), 출원인코드, 대표IPC 관리번호, 국가코드, 자료구분, 상태, 출원번호, 출원일자, 공개번호, 공개일자, 공고번호, 공고일자, 등록번호, 등록일자, 발명명칭(한글), 발명명칭(영문), 출원인(한글), 출원인(영문), 출원인코드, 대표출원인, 출원인국적, 출원인주소, 발명자, 발명자E, 발명자코드, 발명자주소, 발명자 우편번호, 발명자국적, 대표IPC, IPC코드, 요약, 미국특허분류, 대리인주소, 대리인코드, 대리인(한글), 대리인(영문), 국제공개일자, 국제공개번호, 국제출원일자, 국제출원번호, 우선권, 우선권주장일, 우선권국가, 우선권출원번호, 원출원일자, 원출원번호, 지정국, Citing Patents, Cited Patents
저장형식	Text(ASCII format) Excel format PIAS분석(.xls)
메일정보	받는사람 (필수) @ 보내는사람 (선택) @ 제목 내용 KISTI 검색결과 이메일 서비스
안내	총 건의 자료가 검색되었습니다. 다운받으실 자료의 인덱스를 입력하세요. (1-10,000) 검색결과의 순서대로 최대 10,000건 까지 다운로드가 가능합니다. 데이타가 많을 경우 속도가 느려질 수 있습니다.(최대 2~3분 소요) 다운로드 파일은 UTF-8 형태로 저장됩니다. 파일의 내용이 제대로 보이지 않을실 때는 웹브라우저 상단의 보기 -> 인코딩 -> 자동선택 여부를 확인하십시오. ~ Text(ASCII format) Excel format

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Cost-effective ferritic stainless steel 원문보기

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Cost-effective ferritic stainless steel 원문보기

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