论文部分内容阅读
目前最常用于测定钢的恒温转变曲线(以下简称为C-曲线)的方法有:金相硬度法、电阻法、磁性法和热膨胀方法等。不久前,内耗方法也被用来研究过冷奥氏体的恒温分解过程。金相方法可以对组织和转变产物进行直接的观察,这是其最大的优点,其缺点是工作量相当巨大。电阻法,磁性法和热膨胀方法可以对恒温转变过程进行连续测定,所需试样不多,工作量也较小,但是不能直接了解组织转变的具体情况。因此常常是以金相观测配合上述方法来进行研究。
At present, the most commonly used method for the determination of constant temperature transformation curve of steel (hereinafter referred to as C-curve) are: metallographic hardness method, electrical resistance method, magnetic method and thermal expansion method. Not long ago, the internal friction method was also used to study the thermostatic decomposition of subcooled austenite. Metallurgical method can be directly observed on the organization and the transformation of the product, which is its biggest advantage, the disadvantage is the workload is huge. Resistance method, magnetic method and thermal expansion method can be continuous determination of the constant temperature transformation process, the required sample is small, the workload is also small, but can not directly understand the specific circumstances of organizational changes. Therefore, it is often to metallographic observation with the above method to study.