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用37CrNi3钢研究了过热淬火组织在再次中速加热时所出现的断口遗传,试验表明,此时所出现的断口遗传与再次加热时所保留的原奥氏体晶粒边界有关,随再次加热时保温时间的延长及加热温度的提高,所形成的细小的奥氏体晶粒将通过聚集再结晶而长大,随新奥氏体晶粒的长大,原奥氏体晶界的消失,断口遗传也得到消除。
37CrNi3 steel was used to study the fracture inheritance of the superheated quenched microstructure when heated again at medium speed. The experimental results show that the fracture inheritance at this time is related to the original austenite grain boundary retained by reheating. With the reheating The prolongation of holding time and the increase of heating temperature, the small austenite grains formed will grow up by aggregation and recrystallization. With the growth of new austenite grains, the original austenite grain boundaries disappear and the fracture Heredity has also been eliminated.