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Recent content by fc60

  1. fc60

    Austempering With Molten Lead

    Greetings Carburize22, Many thanks for the post. Since you are currently using the salts, do they have a tendency to bloom and creep? I have used water soluble salts to Black Oxide tools and I store the tank outside within a double plastic bag. Handling Lead does not bother me as I wash...
  2. fc60

    Austempering With Molten Lead

    Greetings, A great start. Learning a lot. Does molten Lead remove the heat from the steel part as quickly as molten salt? I got into Austempering after reading the heat treat specifications on an old blueprint. It said to Austenize 4150 steel at 1550F and quench in salt 650F-675F for 30...
  3. fc60

    Austempering With Molten Lead

    Greetings, New to the forum and I have lots of questions. I am working at Austempering 4140 Steel to a final hardness of 40-42 HRC. Material is 0.75" diameter with a 0.313" hole through 6" in length. I heat the part to 1600F and hold for 30 minutes. Next, the part gets quenched in a bath...

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