CONSTITUTIONAL DIAGRAM OF Fe-Mn-C ALLOYS AFTER SOLUTION TREATMENT AT 1000℃

On the basis of experimental results of 76 points of composition and previous relevant conclu-sions,a relatively complete constitutional diagram of solid solution treating Fe-Mn-C sys-tem alloy at 1000℃ has been constructed with austenite zones of different stabilities.Thechemical composition range and structure change of steels with various Mn have also beendiscussed.Thus,the reasonable selection of composition and structure may be available forthe manganese steel with commercial purposes.