High strength austenitic stainless steel having excellent galling resistance
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C22C-038/34
C22C-038/46
출원번호
US-0036790
(1993-03-25)
발명자
/ 주소
Cordea James N. (West Chester OH) Scumacher William J. (Monroe OH) Sheth Harshad V. (Rancho Palos Verdes CA) Gore Mark J. (West Chester OH)
출원인 / 주소
Armco Inc. (Middletown OH 02)
인용정보
피인용 횟수 :
6인용 특허 :
0
초록▼
A nonmagnetic austenitic stainless steel and articles produced therefrom, such as drill collars, having a 0.2% yield strength of at least 690 N/mm2 (100 ksi), excellent resistance to intergranular stress corrosion, good ductility, good corrosion resistance, very low magnetic permeability (less than
A nonmagnetic austenitic stainless steel and articles produced therefrom, such as drill collars, having a 0.2% yield strength of at least 690 N/mm2 (100 ksi), excellent resistance to intergranular stress corrosion, good ductility, good corrosion resistance, very low magnetic permeability (less than 1.004) and resistance to galling and wear which is typically at least 50% better than found in previous drill collars, the steel and articles consisting essentially of, in weight percent, from greater than 0.05% to about 0.10% carbon, greater than 18% to about 22% manganese, about 12.5% to about 17% chromium, about 1.5% to about 5% nickel, about 0.2% to about 0.4% nitrogen, about 0.2% to about 0.7% vanadium, about 1% maximum copper, about 1% maximum molybdenum, about 2% to about 4% silicon, about 0.05% maximum phosphorus, about 0.03% maximum sulfur and balance essentially iron.
대표청구항▼
An austenitic stainless steel having a 0.2% yield strength of at least 690 N/mm2 (100 ksi), a magnetic permeability not greater than 1.004 at 500 oersteds, acceptable intergranular corrosion resistance as measured by ASTM A-262 Practice E and a resistance to galling up to a stress level of at least
An austenitic stainless steel having a 0.2% yield strength of at least 690 N/mm2 (100 ksi), a magnetic permeability not greater than 1.004 at 500 oersteds, acceptable intergranular corrosion resistance as measured by ASTM A-262 Practice E and a resistance to galling up to a stress level of at least 138 N/mm2 (20 ksi) when self mated, said steel consisting essentially of, in weight percent, from greater than 0.05% to about 0.10% carbon, greater than 16% to about 22% manganese, about 12.5% to about 17% chromium, about 1.5% to about 5% nickel, about 0.2% to about 0.4% nitrogen, about 0.2% to about 0.7% vanadium, about 1% maximum copper, about 1% maximum molybdenum, greater than 2% to about 4% silicon, about 0.5% maximum phosphorus, about 0.03% maximum sulfur and balance essentially iron.
Forbes Jones, Robin M.; Evans, C. Kevin; Lippard, Henry E.; Mills, Adrian R.; Riley, John C.; Dunn, John J., High strength, corrosion resistant austenitic alloys.
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