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While in the U.K. on metallurgical consulting assignments, the writer was presented with a problem of varying surface hardness due to inconsistent formations of retained austenite on repeated batches of carburized and hardened heat-treated components.
We often look to sophisticated tools for answers, but there is a simple, yet highly effective, method for quantifying our furnace’s performance – the Navy C-ring test.
We will address the reasons why retained austenite can be a problem, and we will conclude our discussion with the control and elimination of retained austenite.