HQ785C钢示波冲击特性的缺口效应研究  

Instrumented Impact Behavior of HQ785C Steel With Different Notches

作　　者：李存剑[1] 李少华[1] 翁宇庆[1] 

机构地区：[1]冶金部钢铁研究总院

出　　处：《材料开发与应用》1998年第3期8-10,14,共4页Development and Application of Materials

摘　　要：采用示波冲击试验方法，研究了ＨＱ７８５Ｃ钢的夏比Ｖ型缺口、线切割缺口和预疲劳裂纹３种类型试样在冲击断裂过程中各部分能量与温度的关系。分析了各部分能量随温度变化的规律。试验结果表明，预疲劳裂纹试样的脆性转变温度比线切割缺口试样和夏比Ｖ型缺口试样分别提高约２０℃和４０℃。By an instrumented impact test, relationships of the energies, absorbed by Charpy Vnotch specicmens, sparknotching specimens and precracked specimens of HQ785C steel at various stages during impact test, vs temperature were studied. The results show that nilductility transition temperature of the precraked specimen is 20℃ higher than that of the notching spark specimen and 40℃ higher than that of the Charpy Vnotch specimen. 

关 键 词：高强度钢 示波冲击 缺口效应 HQ785C钢 

分 类 号：TG142.7[一般工业技术—材料科学与工程]