贝壳状断口

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

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

铸钢中贝壳状断口形成机理研究

Study of Forming Mechanism of Conchoidal Fracture in Casting Steel

采用高温扩散退火及随后的热处理可改善或消除贝壳状断口，并可提高机械性能。

It 's improve or eliminate conchoidal and raise mechanica behavior fracture , if introduce high temperture diffuse annealing and heat treatment .

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 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 .

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。

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 .

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；

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 ;

蒸汽吞吐稠油储层矿物溶蚀量和沉淀量的计算其中以贝壳状断口、不规则断块、溶蚀孔、硅质沉淀等形态为主。

CALCULATION OF THE AMOUNT OF MINERAL SPECIES DISSOLVED AND PRECIPITATED IN STEAM HUFF PUFF WELLS Of them conchoidal fractures , solution holes , irregular fractures and siliceous coating are more prominent in the Zhejiang coast zone .