Patents Assigned to ECM Technologies
  • Patent number: 10502488
    Abstract: A quenching cell including an enclosure containing at least one element for stirring a quenching gas at a pressure greater than 0.4 MPa and a synchronous electric motor capable of rotating the stirring element.
    Type: Grant
    Filed: January 22, 2014
    Date of Patent: December 10, 2019
    Assignee: ECM TECHNOLOGIES
    Inventors: Gérard Tissot, Francis Pelissier
  • Patent number: 9938615
    Abstract: A method for the low-pressure carbonitriding of steel parts, in particular parts used in the manufacture of automobiles comprises a heating step that includes a simple heating phase (M) followed by an initial nitridation phase (Ni) from a temperature between 700° C. to 750° C. to a temperature between 860° and 1000° C. carried out using a reduced temperature gradient relative to the simple heating phase. The method further includes alternate cementing (C1-Cn) and nitridation (N1-Nn) steps at constant temperature, wherein the final nitridation step is accompanied with a decrease in temperature immediately before quenching (T).
    Type: Grant
    Filed: October 8, 2012
    Date of Patent: April 10, 2018
    Assignee: ECM TECHNOLOGIES
    Inventors: Philippe Lapierre, Jerome Lardinois, Yves Giraud, Alfred Rallo
  • Publication number: 20170356077
    Abstract: A method for carbonitriding of a steel part arranged in a chamber comprises first steps and second steps, a carburizing gas being injected into the chamber during the first steps only and a nitriding gas being injected into the chamber during the second steps only, at least one of the second steps being situated between two first steps, the pressure in the chamber during at least one part of said two first steps being maintained at a first value and the pressure in the chamber during at least one part of said second step situated between said two first steps being at a second value that is strictly greater than the first value.
    Type: Application
    Filed: December 10, 2015
    Publication date: December 14, 2017
    Applicant: ECM TECHNOLOGIES
    Inventors: Yves GIRAUD, Hubert MULIN
  • Patent number: 9765422
    Abstract: A method for the low-pressure carbonitriding of steel parts, in particular parts used in the manufacture of automobiles comprises a heating step that includes a simple heating phase (M) followed by an initial nitridation phase (Ni) from a temperature between 700° C. to 750° C. to a temperature between 860° C. and 1000° C. and carried out using a reduced temperature gradient relative to the simple heating phase. Additionally, alternate cementing (C1-Cn) and nitridation (N1-Nn) steps are performed at constant temperature, wherein the final nitridation step is accompanied with a decrease in temperature immediately before quenching (T).
    Type: Grant
    Filed: October 8, 2012
    Date of Patent: September 19, 2017
    Assignee: ECM Technologies
    Inventors: Philippe Lapierre, Jerome Lardinois, Yves Giraud, Alfred Rallo
  • Publication number: 20170241008
    Abstract: A method for the low-pressure carbonitriding of steel parts, in particular parts used in the manufacture of automobiles comprises a heating step that includes a simple heating phase (M) followed by an initial nitridation phase (Ni) from a temperature between 700° C. to 750° C. to a temperature between 860° and 1000° C. and carried out using a reduced temperature gradient relative to the simple heating phase. Additionally, alternate cementing (C1-Cn) and nitridation (N1-Nn) steps are performed at constant temperature, wherein the final nitridation step is accompanied with a decrease in temperature immediately before quenching (T).
    Type: Application
    Filed: October 8, 2012
    Publication date: August 24, 2017
    Applicant: ECM Technologies
    Inventors: Philippe Lapierre, Jerome Lardinois, Yves Giraud, Alfred Rallo
  • Patent number: 9708704
    Abstract: A method for the low-pressure carbonitriding of steel parts, in particular parts used in the manufacture of automobiles, comprises a heating step that includes a simple heating phase (M) followed by an initial nitridation phase (Ni) from a temperature between 700° C. to 750° C. to a temperature between 860° and 1000° C. and carried out using a reduced temperature gradient relative to the simple heating phase. Additionally, alternate cementing (C1-Cn) and nitridation (N1-Nn) steps are performed at constant temperature, wherein the final nitridation step is accompanied with a decrease in temperature immediately before quenching (T).
    Type: Grant
    Filed: October 8, 2012
    Date of Patent: July 18, 2017
    Assignee: ECM Technologies
    Inventors: Philippe Lapierre, Jerome Lardinois, Yves Giraud, Alfred Rallo
  • Patent number: 9365909
    Abstract: A cell for quenching a charge under an atmosphere of gas comprises a centrifugal or helicon-centrifugal impeller comprising a gas intake opening and gas discharge openings. The impeller is rotated by a motor to cause a flow of the gas between the charge and a heat exchanger. The quenching cell comprises first and second mobile half-volutes. In a first position, the first half-volute guides the gas discharged by a first part of the discharge openings and the second half-volute closes off a first portion of the intake opening. In a second position, the second half-volute guides the gas discharged by a second part, different from the first part, of the discharge openings and the first half-volute shuts off a second portion of the intake opening.
    Type: Grant
    Filed: October 18, 2012
    Date of Patent: June 14, 2016
    Assignee: ECM TECHNOLOGIES
    Inventor: Gerard Tissot
  • Publication number: 20140284851
    Abstract: A cell for quenching a charge under an atmosphere of gas comprises a centrifugal or helicon-centrifugal impeller comprising a gas intake opening and gas discharge openings. The impeller is rotated by a motor to cause a flow of the gas between the charge and a heat exchanger. The quenching cell comprises first and second mobile half-scrolls. In a first position, the first half-scroll guides the gas discharged by a first part of the discharge openings and the second half-scroll closes off a first portion of the intake opening. In a second position, the second half-scroll guides the gas discharged by a second part, different from the first part, of the discharge openings and the first half-scroll shuts off a second portion of the intake opening.
    Type: Application
    Filed: October 18, 2012
    Publication date: September 25, 2014
    Applicant: ECM TECHNOLOGIES
    Inventor: Gerard Tissot
  • Publication number: 20140238549
    Abstract: A method for the low-pressure carbonitriding of steel parts, in particular parts used in the manufacture of automobiles comprises a heating step that includes a simple heating phase (M) followed by an initial nitridation phase (Ni) from a temperature between 700° C. to 750° C. to a temperature between 860° and 1000° C. and carried out using a reduced temperature gradient relative to the simple heating phase. Additionally, alternate cementing (C1-Cn) and nitridation (N1-Nn) steps are performed at constant temperature, wherein the final nitridation step is accompanied with a decrease in temperature immediately before quenching (T).
    Type: Application
    Filed: October 8, 2012
    Publication date: August 28, 2014
    Applicant: ECM Technologies
    Inventors: Philippe Lapierre, Jerome Lardinois, Yves Giraud, Alfred Rallo
  • Patent number: 8784575
    Abstract: A method for carbonitriding a steel part arranged in an enclosure maintained at a reduced internal pressure, the part being maintained at a temperature level, comprising an alternation of first and second steps, a carburizing gas being injected into the enclosure during the first steps only and a nitriding gas being injected into the enclosure only during at least part of at least two second steps.
    Type: Grant
    Filed: October 22, 2012
    Date of Patent: July 22, 2014
    Assignee: ECM Technologies
    Inventors: Jean Berlier, Aymeric Goldsteinas, Xavier Doussot
  • Publication number: 20130042947
    Abstract: A method for carbonitriding a steel part arranged in an enclosure maintained at a reduced internal pressure, the part being maintained at a temperature level, comprising an alternation of first and second steps, a carburizing gas being injected into the enclosure during the first steps only and a nitriding gas being injected into the enclosure only during at least part of at least two second steps.
    Type: Application
    Filed: October 22, 2012
    Publication date: February 21, 2013
    Applicant: ECM Technologies
    Inventor: ECM Technologies
  • Patent number: 8303731
    Abstract: A method for carbonitriding a steel part arranged in an enclosure maintained at a reduced internal pressure, the part being maintained at a temperature level, comprising an alternation of first and second steps, a carburizing gas being injected into the enclosure during the first steps only and a nitriding gas being injected into the enclosure only during at least part of at least two second steps.
    Type: Grant
    Filed: April 19, 2006
    Date of Patent: November 6, 2012
    Assignee: ECM Technologies
    Inventors: Jean Berlier, Aymeric Goldsteinas, Xavier Doussot