Magnetic analysis of precipitation and coarsening of carbides in steels
Magnetic analysis of precipitation and coarsening of carbides in steels
复制标题
钢中碳化物析出和粗化的磁力分析
DOI：
10.2355/isijinternational.37.65
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发表时间：
1997
影响因子：
1.8
通讯作者：
H. Hildebrand
中科院分区：
文献类型：
--
作者：
H. Hildebrand
碳、铬、锰合金钢中弥散组织是马氏体初始状态下碳化物颗粒析出和粗化的结果。在时效温度T=500，600，通过测量矫顽场强度Hc，在650和700 ℃，时间t=1至4290分钟的条件下，对钢中M_3C和高铝钢中M_6C（+ MC）碳化物颗粒的扫描电镜照片进行了粒度分析。X80WM06.5钢的屈服与Hc有一定的关系，因此Hc可以作为间接的组织特征量，而不是直接观察到的组织数据。据发现，成核，生长和占主导地位的粗化的颗粒永久发生在所谓的代。随着时间的增加，颗粒尺寸在一个又一个的后续世代变得更小，因为参与元素的沉淀基体贫化。奥斯特瓦尔德成熟定律将分别适用于每一代。所有的过程和关系，这是连接到Hc。可以用数学来表示。
Dispersion microstructures in C-, Cr- and Mn-alloyed steels result from the precipitation and coarsening of carbide particles from the martensitic initial condition. The changes in the microstructure were observed at aging temperatures T=500, 600, 650 and 700'C and for the time t=1 to 4290min by measuring the coercive field strength Hc• The particle size analysis on scanning electron micrographs of M3C in the steels and of M6C ( + MC) carbide particles in the case of the high-al]oyed steel X80WM06.5 yielded to a certain connection with Hc• Thus Hc can be taken as an indirect microstructural characteristic quantity instead of directly observed microstructure data. It was found that nucleation, growth and the dominating coarsening of the particles take place permanently in so-called generations. With increasing time the particle sizes in the one after another following generations become smaller because of the matrix depletion of the participated elements by precipitation. The Ostwald-ripening law is to apply separately to each generation. All the processes and relationships, which are connected with Hc. can be written mathematically.