Method for heat treating a serviced turbine part

Method for heat treating a serviced turbine part

  • CN 101,003,849 B
  • Filed: 01/05/2007
  • Issued: 11/26/2014
  • Est. Priority Date: 01/05/2006
  • Status: Active Grant
First Claim
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1. for a method for turbine components (10) processing of thermal treatment complete mechanical, maintenance, described turbine components is made up of nickel-base alloy, and described method comprises:

  • This turbine components is placed in a vacuum melting furnace that is designed to limiting surface oxidation;

    Controllably heat this turbine components to prevent distortion, comprise this turbine components is stabilized in and comprises 1000 of to 1100 othe first holding temperature and 1500 of F of to 1600 othe a series of middle holding temperature of the second holding temperature of F;

    Heat this turbine components to 1750 of to 1900 othe thermal spike of F and stablize this turbine components at this thermal spike;

    Controllably cooling this turbine components, to prevent distortion, comprises and stablizes this turbine components 1500 of to 1600 othe third dimension of F is held temperature;

    Heat this turbine components to 1300 of to 1350 othe aging temperature of F and stablize this turbine components at this aging temperature;

    Cooling this turbine components comprises makes this turbine components be stabilized in 1125 of to 1175 othe fourth dimension of F is held temperature;

    And Cooling this turbine part is to room temperature;

    Recrystallize surface damage layer thus, makes it to become and has at least fine grained structure of the grain size of ASTM grain fineness number 6, to prevent fatigue cracking.

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