Patents Assigned to ECM Technologies
  • 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
  • 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