Method for improving resistant property of ferrite/martensite heat resistant steel for high-temperature water vapour oxidation

Method for improving resistant property of ferrite/martensite heat resistant steel for high-temperature water vapour oxidation

  • CN 101,225,464 B
  • Filed: 01/31/2008
  • Issued: 06/27/2012
  • Est. Priority Date: 01/31/2008
  • Status: Active Grant
First Claim
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1. a method that improves the anti-steam oxidation performance of martensite high temperature steel is characterized in that:

  • the laser surface heat of phase transformation is carried out on martensite high temperature steel surface handle, make martensite high temperature steel top layer with 10 3

    10 7

    /speed of s is warming up to the austenitic area, and austenite phase transformation takes place, moment with 10 3

    /the above speed of cooling of s carries out self-quench hardening and forms grain-size less than 25 μ

    m fine grained regions, and the mass percent of the Cr of described martensite type refractory steel is 9-12%.

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