Patents Assigned to Dalmine S.p.A.
  • Patent number: 9657365
    Abstract: Disclosed herein are embodiments of a seamless quenched and tempered steel pipe which can have a wall thickness WT higher than or equal to 6 mm and lower than or equal to 35 mm. Some embodiments of the steel pipe can have a chemical composition comprising C, Mn, Si, Cr, Ni, Mo, Al, N, Ca, Nb, Ti, V, Zr, and Ta based on the composition weight, the remaining being iron and impurities. In some embodiments, wherein (V+Nb) content is lower than 0.07 wt %; defining a first parameter P1=(60×C)+Cr+[5×e(35×Mo/WT)]+50×(V+Nb), the chemical composition satisfies a first condition P1?14.5.
    Type: Grant
    Filed: April 8, 2014
    Date of Patent: May 23, 2017
    Assignee: DALMINE S.P.A.
    Inventors: Ettore Anelli, Emanuele Paravicini Bagliani, Stafano Fare, José Enrique Garcia Gonzalez, Victor Blancas Garcia, Héctor Manuel Quintanilla Carmona
  • Patent number: 9644248
    Abstract: Disclosed herein are embodiments of a seamless quenched and tempered steel pipe having a wall thickness (WT) higher than or equal to 35 mm and lower than or equal to 80 mm. Embodiments of the steel pipe can comprise C, Mn, Cr, Ni, Mo, Al, Ca, N, Nb, Ti, Zr, and Ta. Further, for some embodiments of the steel pipe wherein, defining a first parameter P1=50×C+Cr+10×Mo+70×V, the chemical composition can satisfy a first condition P1?8.0.
    Type: Grant
    Filed: April 8, 2014
    Date of Patent: May 9, 2017
    Assignee: DALMINE S.P.A.
    Inventors: Ettore Anelli, Emanuele Paravicini Bagliani, Stefano Fare
  • Patent number: 9598746
    Abstract: Low-alloy steels and methods of manufacturing pipes having a wall thickness greater than or equal to about 8 mm and less than or equal to about 35 mm therefrom are provided. In one embodiment, a steel composition is processed that yields an average prior austenite grain size greater than about 15 or 20 ?m and smaller than about 100 ?m. A quenching sequence has been determined that yields a microstructure of greater than or equal to about 60% martensite by volume, and less than or equal to about 40% by volume lower bainite, without substantial formation of ferrite, upper bainite, or granular bainite. The yield strength of the quenched and tempered pipes may be greater than about 70 ksi, 80 ksi, or 90 ksi. The quenched and tempered pipes are suitable for 70 ksi, 80 ksi, and 90 ksi grades and resistant to sulfide stress corrosion cracking.
    Type: Grant
    Filed: February 6, 2012
    Date of Patent: March 21, 2017
    Assignee: DALMINE S.P.A.
    Inventors: Ettore Anelli, Mariano Armengol, Paolo Novelli, Federico Tintori
  • Publication number: 20140299236
    Abstract: Disclosed herein are embodiments of a seamless quenched and tempered steel pipe which can have a wall thickness WT higher than or equal to 6 mm and lower than or equal to 35 mm. Some embodiments of the steel pipe can have a chemical composition comprising C, Mn, Si, Cr, Ni, Mo, Al, N, Ca, Nb, Ti, V, Zr, and Ta based on the composition weight, the remaining being iron and impurities. In some embodiments, wherein (V+Nb) content is lower than 0.07 wt %; defining a first parameter P1=(60×C)+Cr+[5×e(35×Mo/WT)]+50×(V+Nb), the chemical composition satisfies a first condition P1?14.5.
    Type: Application
    Filed: April 8, 2014
    Publication date: October 9, 2014
    Applicant: Dalmine S.p.A.
    Inventors: Ettore Anelli, Emanuele Paravicini Bagliani, Stefano Fare, José Enrique Garcia Gonzales, Victor Blancas Garcia, Héctor Manuel Quintanilla Carmona
  • Publication number: 20140299235
    Abstract: Disclosed herein are embodiments of a seamless quenched and tempered steel pipe having a wall thickness (WT) higher than or equal to 35 mm and lower than or equal to 80 mm. Embodiments of the steel pipe can comprise C, Mn, Cr, Ni, Mo, Al, Ca, N, Nb, Ti, Zr, and Ta. Further, for some embodiments of the steel pipe wherein, defining a first parameter P1=50×C+Cr+10×Mo+70×V, the chemical composition can satisfy a first condition P1?8.0.
    Type: Application
    Filed: April 8, 2014
    Publication date: October 9, 2014
    Applicant: Dalmine S.p.A.
    Inventors: Ettore Anelli, Emanuele Paravicini Bagliani, Stefano Fare
  • Patent number: 8821653
    Abstract: Embodiments of the present disclosure comprise carbon steels and methods of manufacturing thick walled pipes (wall thickness greater than or equal to about 35 mm) there from. In one embodiment, a steel composition is processed that yields an average prior austenite grain size greater than about 15 or 20 ?m and smaller than about 100 ?m. Using this composition, a quenching sequence is provided that yields a microstructure of greater than or equal to about 50% by volume, and less than or equal to about 50% by volume, lower bainite, without substantial ferrite, upper bainite, or granular bainite. After quenching, pipes may be tempered. The quenched and tempered pipes may exhibit yield strengths greater than about 450 MPa (65 ksi) or 485 (70 ksi). Mechanical property measurements find the quenched and tempered pipes suitable for 450 MPa grade and 485 MPa grade, and resistance to sulfide stress corrosion cracking.
    Type: Grant
    Filed: February 6, 2012
    Date of Patent: September 2, 2014
    Assignee: Dalmine S.p.A.
    Inventors: Ettore Anelli, Mariano Armengol, Paolo Novelli, Federico Tintori
  • Publication number: 20120204994
    Abstract: Embodiments of the present disclosure comprise carbon steels and methods of manufacturing thick walled pipes (wall thickness greater than or equal to about 35 mm) there from. In one embodiment, a steel composition is processed that yields an average prior austenite grain size greater than about 15 or 20 ?m and smaller than about 100 ?m. Using this composition, a quenching sequence is provided that yields a microstructure of greater than or equal to about 50% by volume, and less than or equal to about 50% by volume, lower bainite, without substantial ferrite, upper bainite, or granular bainite. After quenching, pipes may be tempered. The quenched and tempered pipes may exhibit yield strengths greater than about 450 MPa (65 ksi) or 485 (70 ksi). Mechanical property measurements find the quenched and tempered pipes suitable for 450 MPa grade and 485 MPa grade, and resistance to sulfide stress corrosion cracking.
    Type: Application
    Filed: February 6, 2012
    Publication date: August 16, 2012
    Applicant: Dalmine S.P.A.
    Inventors: Ettore Anelli, Mariano Armengol, Paolo Novelli, Federico Tintori
  • Publication number: 20120199255
    Abstract: Low-alloy steels and methods of manufacturing pipes having a wall thickness greater than or equal to about 8 mm and less than or equal to about 35 mm therefrom are provided. In one embodiment, a steel composition is processed that yields an average prior austenite grain size greater than about 15 or 20 ?m and smaller than about 100 ?m. A quenching sequence has been determined that yields a microstructure of greater than or equal to about 60% martensite by volume, and less than or equal to about 40% by volume lower bainite, without substantial formation of ferrite, upper bainite, or granular bainite. The yield strength of the quenched and tempered pipes may be greater than about 70 ksi, 80 ksi, or 90 ksi. The quenched and tempered pipes are suitable for 70 ksi, 80 ksi, and 90 ksi grades and resistant to sulfide stress corrosion cracking.
    Type: Application
    Filed: February 6, 2012
    Publication date: August 9, 2012
    Applicant: DALMINE S.P.A.
    Inventors: Ettore Anelli, Mariano Armengol, Paolo Novelli, Federico Tintori
  • Patent number: 8002910
    Abstract: The present invention pertains to steel with high mechanical resistance at room temperature and up to 130° C., good toughness and good corrosion resistance in the metal base as well as good resistance to cracking in the heat affected zones (HAZ) once the tubing is welded together, and more specifically to heavy gauge seamless steel tubing with high mechanical resistance, good toughness and good corrosion resistance called catenary conduit. The advantages of the present invention with respect to those of an the state of technology reside in providing a chemical composition for steel used to manufacture heavy gauge seamless steel tubing with high mechanical resistance, good toughness, good fissure resistance in the HAZ and good corrosion resistance and a process for manufacturing this product. These advantages are obtained by using a composition made up basically of Fe and a specific chemical composition.
    Type: Grant
    Filed: April 25, 2003
    Date of Patent: August 23, 2011
    Assignees: Tubos De Acero De Mexico S.A., Dalmine S.p.A.
    Inventors: Marco Mario Tivelli, Alfonso Izquierdo Garcia, Dionino Colleluori, Guiseppe Cumino
  • Publication number: 20070089813
    Abstract: The present invention pertains to steel with high mechanical resistance at room temperature and up to 130° C., good toughness and good corrosion resistance in the metal base as well as good resistance to cracking in the heat affected zones (HAZ) once the tubing is welded together, and more specifically to heavy gauge seamless steel tubing with high mechanical resistance, good toughness and good corrosion resistance called catenary conduit. The advantages of the present invention with respect to those of an the state of technology reside in providing a chemical composition for steel used to manufacture heavy gauge seamless steel tubing with high mechanical resistance, good toughness, good fissure resistance in the HAZ and good corrosion resistance and a process for manufacturing this product. These advantages are obtained by using a composition made up basically of Fe and a specific chemical composition.
    Type: Application
    Filed: April 25, 2003
    Publication date: April 26, 2007
    Applicants: Tubos De Acero Mexico S.A., Dalmine S.P.A.
    Inventors: Marco Tivelli, Alfonso Izquierdo Garcia, Dionino Colleluori, Guiseppe Cumino
  • Patent number: 7066499
    Abstract: Pipe integral threaded joint formed by a male element (1) and a female element (2) respectively placed on the external surface and on the internal surface of two truncated cone-shaped parts of the threading (6, 7, 8, 9) having the same conicity value and being radially spaced, both being respectively divided by annular shoulders (5, 5?) which are parallel and orthogonal with respect to the pipe axis. They are provided two sealing surfaces (12, 12?, 13, 13?), one of them being cone-shaped and the other being spherical. After the screwing of the two elements (1, 2) said two annular shoulders (5, 5?) are in contact. Each male (1) and female (2) element comprises, respectively along its external and internal surface, a circumference cavity (14, 15) placed between a part of the threading and the annular shoulder (5, 5?) in order to allow the expansion of the lubricating fat.
    Type: Grant
    Filed: July 16, 2001
    Date of Patent: June 27, 2006
    Assignee: Dalmine S.p.A.
    Inventors: Giuseppe Della Pina, Giuseppe Rotini, Angelo Signorelli
  • Patent number: 7014223
    Abstract: A flush-type integral threaded joint with truncated-cone threads, with two scaling surfaces 11?, 12?, 11?, 12?) set at the end of the threaded portions (7, 8), and with two annular scaling shoulders (5?, 6?, 5?, 6?). The two threaded portions (7, 8) of the male element (1) and female element (2), respectively, have the same value of conicity, and the two sealing surfaces (11?, 12?, 11?, 12?) are, in one case, conical or cylindrical, and in the other spherical. The threaded portion of each male and female element may have an end area with a thread that is not perfect.
    Type: Grant
    Filed: August 8, 2001
    Date of Patent: March 21, 2006
    Assignee: Dalmine S.p.A. (Italian Joint Stock Company)
    Inventors: Giuseppe Della Pina, Giuseppe Rotini, Angelo Signorelli
  • Patent number: 5944921
    Abstract: A supermartensitic stainless steel having high mechanical strength and corrosion resistance showing the following percentage composition C.ltoreq.0.05; Cr 12-15; Ni 4-7; Mo 1.5-2; N 0.06-0.12; Mn 0.5-1; Cu<0.3; P<0.02; S.ltoreq.0.005; Al<0.02; Si.ltoreq.1; the rest being iron and minor impurities, with the further requirement that the percentages of Cr, Mo and N satisfy the following formula: (Cr+3.3 Mo+16 N).gtoreq.19. Said steel allows to obtain manufactured articles having excellent mechanical strength and corrosion resistance characteristics.
    Type: Grant
    Filed: November 11, 1997
    Date of Patent: August 31, 1999
    Assignee: Dalmine S.p.A.
    Inventors: Giuseppe Cumino, Massimo Barteri
  • Patent number: 5538226
    Abstract: A pushing machine is described, which is capable of running to opposite directions, upon remote control, along a length of rail provided in front of the mouth or slag hole of an electric furnace (10) for the smelting of iron products. It shows, at the end of an arm (5, 5a) telescopically extensible and preferably pivoting to be able to swing also in the vertical plane, a head or front shield (6) mounted on a frame (1) which can be anchored to the ground and is slidable on rails by means of wheels (2, 2' . . . ), at least two of which are driving wheels. Said shield (6), having a size slightly smaller than the slag hole, has the function of keeping the scrap at the inside of the furnace during the charging operation and keeping the threshold free of the slag without any operator's intervention.
    Type: Grant
    Filed: March 17, 1995
    Date of Patent: July 23, 1996
    Assignee: Dalmine S.p.A.
    Inventor: Ugo della Foglia
  • Patent number: 5352406
    Abstract: A properly balanced chemical composition and the choice of a heat treatment (annealing and quenching) under controlled conditions allow to obtain uperduplex stainless steel manufactures which, in the hot-worked form, are excellent in resistance to corrosion and have unit tensile yield strength at room temperature of 90 ksi min.
    Type: Grant
    Filed: April 23, 1993
    Date of Patent: October 4, 1994
    Assignees: Centro Sviluppo Materiali S.p.A., Dalmine S.p.A.
    Inventors: Massimo Barteri, Ivan Nembrini
  • Patent number: 5109689
    Abstract: In an improved process for hot-rolling of seamless tubes with preliminary diameter reduction of the semifinished products (axially pierced round blanks), the coreless reduction step (without mandrel) occurs immediately before the step of continuous rolling on a mandrel and practically at the same time of driving the mandrel into the pierced blank, without interferences therebetween. The apparatus carrying out this operation is positioned immediately upstream of the continuous mill with mandrel, so as to form with this a single unit on the same line, thus reducing the need for room, the operation time and consequently the blank cooling before rolling, whereby the last stand of the rolling mill is reached at a sufficient temperature for rolling without any need of intermediate heating steps.
    Type: Grant
    Filed: November 27, 1990
    Date of Patent: May 5, 1992
    Assignee: Dalmine S.p.A.
    Inventor: Raimondo D'Avanzo
  • Patent number: 3993482
    Abstract: A zinc based coating material useful for protecting ferrous surfaces against corrosion, also including magnesium, aluminum and chromium, wherein the percentage rato Mg/Al is between 1.5 and 5, the percentage ratio Cr/Mg is comprised between 0.03 and 0.2 and the amount of magnesium is between 1% and 5% by weight.
    Type: Grant
    Filed: January 8, 1975
    Date of Patent: November 23, 1976
    Assignee: Dalmine S.p.A.
    Inventor: Roberto Brunno