论文部分内容阅读
对锻造的4Cr14Ni14W2Mo钢经相应热处理后的奥氏体晶粒度、孪晶及碳化物类型进行了研究。认为固溶处理后的奥氏体晶粒度主要取决于固溶加热温度,与锻造温度关系不大。固溶加热过程实质是再结晶过程的继续,即二次再结晶。奥氏体晶粒的大小只能通过控制再结晶温度的高低和时间长短来实现。该钢热处理后,碳化物类型为M_(23)C_6和M_7C_3两种,而以M_(23)C_6居多。其中M_(23)C_6为(Cr、Fe、W、Mo)_(23)C_6和(Fe、Ni)_(23)C_6两种结构,而M_7C_3为(Cr、Fe)_7C_3。
The forged 4Cr14Ni14W2Mo steel after the corresponding heat treatment of austenite grain size, twin and carbide types were studied. It is considered that the grain size of austenite after solution treatment mainly depends on the solution heating temperature, which has little to do with the forging temperature. The solution heating process is essentially the continuation of the recrystallization process, ie, secondary recrystallization. The size of austenite grains can only be achieved by controlling the recrystallization temperature and the length of time. After the steel was heat-treated, the carbide types were M_ (23) C_6 and M_7C_3, while M_ (23) C_6 was the most. Among them, M_ (23) C_6 is (Cr, Fe, W, Mo) _ (23) C_6 and (Fe, Ni) __ (23) C_6, while M_7C_3 is (Cr, Fe) _7C_3.