HIGH-STRENGTH SEAMLESS STAINLESS STEEL TUBE FOR OIL COUNTRY TUBULAR GOODS AND METHOD FOR MANUFACTURING THE SAME

    公开(公告)号:CA2872342C

    公开(公告)日:2018-07-17

    申请号:CA2872342

    申请日:2013-05-30

    Applicant: JFE STEEL CORP

    Abstract: Provided is a high-strength stainless steel tube for oil country tubular goods having a wall thickness of more than 25.4 mm and a high strength of a 110 ksi (758 MPa) grade yield stress or more with excellent toughness and excellent corrosion resistance. A steel material having a chemical composition containing, by mass%, C: 0.005% or more and 0.06% or less, Si: 0.05% or more and 0.5% or less, Mn: 0.2% or more and 1.8% or less, Cr: 15.5% or more and 18.0% or less, Ni: 1.5% or more and 5.0% or less, V: 0.02% or more and 0.2% or less, Al: 0.002% or more and 0.05% or less, N: 0.01% or more and 0.15% or less, 0: 0.006% or less, and further containing one or more of Mo: 1.0% or more and 3.5% or less, W: 3.0% or less and Cu: 3.5% or less, in which the relational expressions Cr+0.65Ni+0.60Mo+0.30W+0.55Cu-20C>=19.5 and Cr+Mo+0.50W+0.30Si-43.5C-0.4Mn-Ni-0.3Cu-9N>=11.5 are satisfied, is made into a seamless steel tube by performing heating and hot rolling. The hot rolling is performed under conditions such that the total rolling reduction in a temperature range of 1100°C to 900°C is 30% or more. After the hot rolling has been performed, cooling is performed at a cooling rate equal to or more than an air-cooling rate, and, further, quenching-tempering is performed. With this method, a high-strength and high-toughness seamless steel tube having a strength of 110 ksi (758 MPa) or more and a toughness of 40 J or more in terms of vE-10 despite having a thick wall and excellent corrosion resistance even in a high-temperature corrosion environment having a temperature of 230°C and containing CO2 and Cl- can be stably manufactured.

    HIGH-STRENGTH STAINLESS STEEL SEAMLESS PIPE FOR USE AS OIL WELL PIPING, AND MANUFACTURING METHOD THEREFOR

    公开(公告)号:IN2395KON2014A

    公开(公告)日:2015-05-01

    申请号:IN2395KON2014

    申请日:2014-10-28

    Applicant: JFE STEEL CORP

    Abstract: Provided is a high-strength stainless steel seamless pipe for use as oil well piping that has a wall thickness surpassing 25.4 mm, that is rated at 110 ksi (758 MPa) or higher, that exhibits a vE-10 of 40J or higher, and that exhibits excellent corrosion resistance in a high-temperature corrosive environment. The steel seamless pipe is obtained by heating and hot rolling a steel material of which the composition includes, in terms of mass%, 0.005-0.06% of C, 0.05-0.5% of Si, 0.2-1.8% of Mn, 15.5-18.0% of Cr, 1.5-5.0% of Ni, 0.02-0.2% of V, 0.002-0.05% of Al, 0.01-0.15% of N, and 0.006% or less of O, and additionally includes 1.0-3.5% of Mo and/or 3.0% or less of W and/or 3.5% or less of Cu so as to satisfy [Cr + 0.65Ni + 0.60Mo + 0.30W + 0.55Cu - 20C ≧ 19.5] and [Cr + Mo + 0.50W + 0.30Si - 43.5C - 0.4Mn - Ni - 0.3Cu - 9N ≧ 11.5]. On this occasion, hot rolling is carried out so as to achieve a total rolling reduction rate of 30% or more in the temperature range of 1100-900° C. After completion of hot rolling, cooling is carried out at a cooling rate faster than that of air cooling, and a hardening-tempering treatment is performed.

    HIGH-STRENGTH SEAMLESS STAINLESS STEEL TUBE FOR OIL COUNTRY TUBULAR GOODS AND METHOD FOR MANUFACTURING THE SAME

    公开(公告)号:CA2872342A1

    公开(公告)日:2013-12-05

    申请号:CA2872342

    申请日:2013-05-30

    Applicant: JFE STEEL CORP

    Abstract: Provided is a high-strength stainless steel seamless pipe for use as oil well piping that has a wall thickness surpassing 25.4 mm, that is rated at 110 ksi (758 MPa) or higher, that exhibits a vE-10 of 40J or higher, and that exhibits excellent corrosion resistance in a high-temperature corrosive environment. The steel seamless pipe is obtained by heating and hot rolling a steel material of which the composition includes, in terms of mass%, 0.005-0.06% of C, 0.05-0.5% of Si, 0.2-1.8% of Mn, 15.5-18.0% of Cr, 1.5-5.0% of Ni, 0.02-0.2% of V, 0.002-0.05% of Al, 0.01-0.15% of N, and 0.006% or less of O, and additionally includes 1.0-3.5% of Mo and/or 3.0% or less of W and/or 3.5% or less of Cu so as to satisfy [Cr + 0.65Ni + 0.60Mo + 0.30W + 0.55Cu - 20C ? 19.5] and [Cr + Mo + 0.50W + 0.30Si - 43.5C - 0.4Mn - Ni - 0.3Cu - 9N ? 11.5]. On this occasion, hot rolling is carried out so as to achieve a total rolling reduction rate of 30% or more in the temperature range of 1100-900° C. After completion of hot rolling, cooling is carried out at a cooling rate faster than that of air cooling, and a hardening-tempering treatment is performed.

    Procedimiento para la fabricación de tubos sin soldadura de acero inoxidable de alta resistencia para utilizarse en tuberías de pozos petrolíferos

    公开(公告)号:ES2708275T3

    公开(公告)日:2019-04-09

    申请号:ES13796392

    申请日:2013-05-30

    Applicant: JFE STEEL CORP

    Abstract: Procedimiento para fabricar un tubo sin soldadura de acero inoxidable de alta resistencia para productos tubulares de países petrolíferos con un grosor de pared de más de 25,4 mm, comprendiendo el procedimiento el calentamiento de un material de acero; laminado en caliente, incluyendo laminado con perforación del material de acero en un tubo de acero sin soldadura; y enfriado del tubo de acero sin soldadura a temperatura ambiente a una velocidad de enfriamiento igual o superior a la velocidad de enfriamiento por aire, presentando el material de acero una composición química que contiene, en % en masa, C: 0,005% o más y 0,06% o menos, Si: 0,05% o más y 0,5% o menos, Mn: 0,2% o más y 1,8% o menos, P: 0,03% o menos, S: 0,005% o menos, Cr: 15,5% o más y 18,0% o menos, Ni: 1,5% o más y 4,5% o menos, V: 0,02% o más y 0,2% o menos, Al: 0,002% o más y 0,05% o menos, N: 0,01% o más y 0,15% o menos, O: 0,006% o menos, y que consiste, además, en uno, dos o más seleccionados de entre Mo: 1,0% o más y 3,5 % o menos, W: 3,0% o menos y Cu: 3,5% o menos, opcionalmente, además, uno o más seleccionados de entre Nb: 0,2% o menos, Ti: 0,3% o menos, Zr: 0,2% o menos y B: 0,01% o menos, y Ca: 0,01% menos, y siendo el resto Fe e impurezas inevitables, en el que se cumplen las siguientes expresiones relacionales (1) y (2), el laminado en caliente, incluyendo laminado con perforación, se realiza bajo unas condiciones de manera que la reducción total de laminado en un rango de temperaturas de 1100 ºC a 900 ºC es de un 30% o más y, después de que el tubo de acero laminado se enfríe a temperatura ambiente, se realiza un temple-revenido o revenido: Cr + 0,65Ni + 0,60Mo + 0,30W + 0,55Cu - 20C >= 19,5 ... (1), Cr + Mo + 0,50W + 0,30Si-43,5C-0,4Mn-Ni-0,3Cu-9N >=11,5 ··· (2), donde Cr, Mo, W, Si, C, Mn, Ni, Cu y N: contenido (% en masa) de elementos químicos respectivamente representados por los símbolos atómicos correspondientes.

    METODO PARA LA FABRICACION DE UN TUBO DE ACERO DE PARED GRUESA.

    公开(公告)号:MX2015003780A

    公开(公告)日:2015-07-14

    申请号:MX2015003780

    申请日:2013-10-03

    Applicant: JFE STEEL CORP

    Abstract: En la técnica convencional, es difícil ajustar de forma estable la resistencia de un tubo de acero de pared gruesa a una resistencia objetivo de 95 a 140 ksi (= TS: 655 a 965 MPa) mediante una operación de Q-T. Específicamente, un método para la fabricación de un tubo de acero de pared gruesa incluye una etapa de enfriamiento en la cual un tubo de acero, con un espesor de pared de 1/2 pulgada o más, que se ha calentado al intervalo gamma (es decir, región austenítica) se sumerge en agua mientras se soporta y se hace girar el tubo de acero alrededor del eje de tubo, una corriente axial la cual es un flujo de agua en la dirección del eje de tubo se aplica a la superficie interior del tubo de acero bajo rotación en el agua, y una corriente de impacto la cual es un flujo de agua que choca sobre la superficie exterior del tubo se aplica a la superficie exterior del tubo de acero bajo rotación en el agua. La rotación se realiza a una velocidad circunferencial de tubo de 4 m/s o más, la aplicación de la corriente axial y la corriente de impacto se inicia dentro de 1.1 s después de que todo el tubo de acero se sumerge, y se continúa hasta que la temperatura del tubo de acero se reduce a 150 °C o inferior, la velocidad de flujo de tubo de la corriente axial se establece en 7 m/s o más, y la velocidad de flujo de descarga de la corriente de impacto se establece en 9 m/s o más.

    EXPANDED METAL TUBE MANUFACTURING METHOD
    10.
    发明公开
    EXPANDED METAL TUBE MANUFACTURING METHOD 有权
    轨道金属管的制造方法

    公开(公告)号:EP2857119A4

    公开(公告)日:2015-12-16

    申请号:EP12877718

    申请日:2012-05-29

    Applicant: JFE STEEL CORP

    CPC classification number: B21D39/20 B21C1/24 B21C3/16 B21D41/026 G06F17/5018

    Abstract: In Tube expanding manufacturing using only an internal tool, it conventionally takes a long time and is expensive to determine manufacturing conditions. Thus specifically, through a tube expanding processing simulation, a workpiece shape in a state where a tip of a workpiece 10 has advanced by 1.0 m or more after passing through a shoulder portion 3 of a tool 1 is evaluated. A hollow piece shape and a tool shape such that the external diameter is within ±1% of the target, the thickness is within ±7.5% of the target, and the internal gap between the hollow piece and the tool is 1.0 mm or less are obtained by repeated calculation, and thereby actual tube expanding manufacturing conditions are determined.

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