conchoidal fracture

Study of Forming Mechanism of Conchoidal Fracture in Casting Steel

铸钢中贝壳状断口形成机理研究

The results indicate that the fracture defect of cast HSLA steel is the conchoidal fracture .

实验的结果认为：铬镍钼铜低合金高强度铸钢中的异常断口为贝壳状断口。

The results show that main cause of conchoidal fracture forming is that composition segregation in solidification grain boundary of casting steel reduces the resistance of crack propagation .

结果表明，沿一次晶晶界的成分偏析对裂纹扩展阻力的降低作用是铸钢中贝壳状断口形成的主要原因。

The modification of MnS inclusions and elimination of the conchoidal fracture are carried out by addition of RE and SiCa into the steel .

加入稀土和硅钙可以控制硫化物形态和消除贝壳状断口。

The conchoidal fracture in casting steel was studied by means of instrumented impact test , facture analysis and metallographic examination . The forming mechanism was also discussed from the fracture mechanics viewpoint .

采用示波冲击试验、断口分析和金相分析等方法，并结合断裂力学对铸钢中贝壳状断口的形成机理进行了研究。

In the fluvial deposit environment , the quartz superficial characteristic is primarily by the inferior circle , the conchoidal breakage fracture and the submarine hit pit , revealing the transformation of current to the quartz ;

在河流沉积环境，石英砂的表面特征以次圆、贝壳状断口和水下撞击坑为主，显示了水流对石英砂颗粒表面的改造；