Patents by Inventor Massimo Barteri

Massimo Barteri has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 6679957
    Abstract: In the thermal treatment of continuous-cast or hot-rolled steel strip, by using particular solutions regarding the choice of the strip rolling temperatures, the transfer times from the coiler to the furnace, as well as specific process steps in annealing, it is possible to treat any type of steel by sending the coils of strip, still at a high temperature, directly to the annealing furnace, at the same time maintaining the mechanical and microstructural characteristics obtainable in traditional cold-strip annealing.
    Type: Grant
    Filed: May 17, 2001
    Date of Patent: January 20, 2004
    Assignee: Acciai Speciali S.p.A.
    Inventors: Massimo Barteri, Sandro Fortunati, Gianni Songini
  • Patent number: 6568462
    Abstract: A process for the production of austenitic stainless steel strips having as case a good weldability, comprising the operations of: solidification in a mold of a continuous casting apparatus with twin counterrotatng rolls, a strip having a thickness comprised between 1 to 5 mm and having the following composition in percent by weight: Cr 17-20; Ni 6-11; c<0.04; n<0.04; s<0.01; Mn<1.5; Si<1.0; Mo 0-3; Al<0.03; and possibly, Ti, Nb, Ta so that: Ti+0.5(Nb+Ta)>6C-3S with proviso that Ti>6S, or NB+Ta>1C with the proviso that TI<6S; being in any case Nb+Ti+Ta<1.0; the remaining part being substantially Fe with a &dgr;-ferrite volume percentage comprised between 4 and 10% calculated with the formula: &dgr;-ferrite=(Creq/Nieq−0.728)×500/3 wherein: Creq/Nieq=[Cr+Mo+1.5Si+)0.5Nb+0.25Ta+2.5(Al+Ti)+18]/[Ni+30(C+N)+0.
    Type: Grant
    Filed: April 20, 2000
    Date of Patent: May 27, 2003
    Assignees: Acciai Speciali Terni S.p.A., Voest-Alpine Industrieanlagenbau GmbH
    Inventors: Massimo Barteri, Giorgio Porcu, Antonio Mascanzoni
  • 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: 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: 4118255
    Abstract: A process for inhibiting grain growth in the production of a single oriented continuously cast silicon steel strip with high magnetic characteristics, including the steps of continuously casting a silicon steel strip; solubilizing iron sulfide in the silicon steel strip by uniformly heating the strip to a temperature between and C; slowly cooling the silicon steel strip to a temperature below C to precipitate dissolved sulfur as manganese sulfide; and hot-rolling the continuously cast silicon steel strip at a temperature over C.
    Type: Grant
    Filed: July 28, 1976
    Date of Patent: October 3, 1978
    Assignees: Centro Sperimentale Metallurgico S.p.A, Terni Societa per 1'Industria e'Elettricita S.p.A.
    Inventors: Mario Barisoni, Massimo Barteri, Roberto Ricci-Bitti, Edmondo G. A. Marianeschi, Sandro C. Basevi, Carlo Borgianni, Carlo Santafe
  • Patent number: 4014717
    Abstract: A process for the production of oriented-grain high magnetic permeability steel sheet including the steps of continuously casting a steel slab haing a weight % composition within the range of 2.5-3.5 Si, 0.01-0.04 S, less than 0.07 C, less than 0.15 Mn, and an acid-soluble aluminum in an amount between 0.01 and 0.05, at a feed rate ranging from 700 to 1000 kg/minute, into an ingot mold of a length over 1200 mm and cooling it in said ingot mold with a quantity of water ranging from 2.8 to 4 m.sup.3 per ton of steel; heating the slab so obtained to C and immediately thereafter hot-rolling it to a thickness in the range between 2 and 3.1 mm, annealing the strip so obtained at a temperature in the range between and C, keeping it at this temperature for a duration between 5 and 30 seconds; cooling it at any desired cooling rate to
    Type: Grant
    Filed: September 16, 1975
    Date of Patent: March 29, 1977
    Assignees: Centro Sperimentale, Metallurgico S.p.A., Terni Societa per l'Industria e l'Elettricita S.p.A.
    Inventors: Mario Barisoni, Massimo Barteri, Roberto Ricci Bitti, Pietro Brozzo, Edmondo Marianeschi
  • Patent number: 3959033
    Abstract: Low carbon silicon-aluminum single-oriented steel sheet having high magnetic induction is produced by hot rolling at, annealing from 10 to 60 seconds at 1050 to, slow cooling to, quenching from, cold rolling with a reduction in thickness of 80 to 90%, recrystallization and decarburization annealing in wet hydrogen from to for 2 minutes, and final annealing at in a mixture of 10-50% hydrogen and 50-90% nitrogen. Cold rolling can be effected in two stages, the first stage to reduce the thickness by 20 to 50% followed by annealing at to, quenching and final cold rolling with a reduction in thickness of 80 to 90%. The preferred temperature range prior to quenching, for one-step cold rolling, is to; and for two-step cold rolling, the first quench is preferably from a temperature of to C.
    Type: Grant
    Filed: July 23, 1974
    Date of Patent: May 25, 1976
    Inventors: Mario Barisoni, Massimo Barteri, Pietro Brozzo, Edmondo Marianeschi, Roberto Ricci Bitti