Seamless steel pipe for steam injection and method for manufacturing the same
Номер патента: MY158405A
Опубликовано: 14-10-2016
Автор(ы): Hideki Takabe, Hisashi Amaya, Kunio Kondo, Taro Ohe, Yohei Otome
Принадлежит: Sumitomo Metal Ind
Опубликовано: 14-10-2016
Автор(ы): Hideki Takabe, Hisashi Amaya, Kunio Kondo, Taro Ohe, Yohei Otome
Принадлежит: Sumitomo Metal Ind
Реферат: THERE IS PROVIDED A HIGH-STRENGTH STAINLESS STEEL FOR OIL WELL HAVING CORROSION RESISTANCE EXCELLENT IN A HIGH-TEMPERATURE ENVIRONMENT, HAVING EXCELLENT SSC RESISTANCE AT NORMAL TEMPERATURE, AND HAVING BETTER WORKABILITY THAN 13% CR STEELS. THE HIGH-STRENGTH STAINLESS STEEL FOR OIL WELL ACCORDING TO THE PRESENT INVENTION HAS A CHEMICAL COMPOSITION CONTAINING, BY MASS PERCENT, C: AT MOST 0.05%, SI: AT MOST 1.0%, MN: AT MOST 0.3%, P: AT MOST 0.05%, S: LESS THAN 0.002%, CR: OVER 16% AND AT MOST 18%, MO: 1.5 TO 3.0%, CU: 1.0 TO 3.5%, NI: 3.5 TO 6.5%, AL: 0.001 TO 0.1%, N: AT MOST 0.025%, AND O: AT MOST 0.01%, THE BALANCE BEING FE AND IMPURITIES, A MICROSTRUCTURE CONTAINING A MARTENSITE PHASE, 10 TO 48.5%, BY VOLUME RATIO, OF A FERRITE PHASE AND AT MOST 10%, BY VOLUME RATIO, OF A RETAINED AUSTENITE PHASE, YIELD STRENGTH OF AT LEAST 758 MPA AND UNIFORM ELONGATION OF AT LEAST 10%.
Welding base metal for recycling railway wheel and method for recycling railway wheel using the same
Номер патента: US12104220B2. Автор: Young Jin Lee. Владелец: Asiatech Co Ltd. Дата публикации: 2024-10-01.