Abstract
The present investigation has been carried out to ascertain the effect of nitrogen on so-called Hadfield steel for saving manganese by addition of nitrogen. From these investigations the authors conclude as follows: (A) It became clear that the grain size of steels at the steps of casting, forging and quenching, became finer as nitrogen increases. (B) The grain growth at high temperature can be suppressed by addition of nitrogen. (C) The austenite structure becomes stable and the rate of crystallizing out of carbide becomes slower as nitrogen increases.
