论文部分内容阅读
金相观察証明,1.4%C-1.4%Cr钢經1100℃奥氏体化(M_s点为112℃)和淬火后再上淬至100℃进行等温过程中,其等溫轉变产物为馬氏体。当鋼內残余奥氏体量較少(<40%)时,等溫馬氏体的形成以原有馬氏体的继續长大为主。当鋼內残余奥氏体量較大(>50%)时,等温馬氏体的形成以重新形核长大为主。等溫馬氏体也可能在原有馬氏体的某些边上形成,它的数量不大,且和残余奥氏体量无关。文中提出可能的解释。
Metallographic observation showed that the isothermal transformation products of 1.4% C-1.4% Cr steel were austenitized at 1100 ℃ (M_s point is 112 ℃) and then quenched to 100 ℃. body. When the amount of retained austenite in the steel is less (<40%), the formation of isothermal martensite is dominated by the growth of the original martensite. When the amount of retained austenite in steel is larger (> 50%), the formation of isothermal martensite mainly re-nucleates and grows. Isothermal martensite may also be formed on some of the original martensite, its small number, and the amount of retained austenite has nothing to do. The paper proposed a possible explanation.