Patents Assigned to Acieries Aubert & Duval
  • Process for the low pressure carburization of metal alloy parts
    Patent number: 5205873
    Abstract: A low pressure carburization process for metal alloy parts uses a fuel mixture consisting of hydrogen with 2 to 60% by volume ethylene. The fuel mixture is heated to a temperature between 820.degree. and 1100.degree. C. A furnace installation for carrying out the process includes a double vacuum tank or vessel arrangement with internal carburizing gas distribution, an annular space surrounding the vessel, a cover, thermocouples and a microcomputer control arrangement.
    Type: Grant
    Filed: July 1, 1991
    Date of Patent: April 27, 1993
    Assignee: Acieries Aubert & Duval
    Inventors: Andre Faure, Jacques Frey