Q345BH型钢动态断裂韧性研究  

Study on Dynamic Fracture Toughness of H-shaped Steel

作　　者：张明如[1] 张峰[2] 顾海澄[1] 

机构地区：[1]西安交通大学材料学院,西安710049 [2]马鞍山钢铁股份有限公司,安徽马鞍山243000

出　　处：《建筑钢结构进展》2005年第6期57-60,共4页Progress in Steel Building Structures

摘　　要：采用Awick Amsler/Roell RKP450仪器化冲击试验机,研究了型钢在-60℃~20℃的冲击韧性和动态断裂韧性。结果表明:在型钢下平台温度范围内,缺口试样冲击能量的绝大部分用于裂纹萌生;在韧脆转变区及上平台范围内,裂纹扩展消耗大量的能量,型钢动态断裂韧性韧脆转变温度约在-40℃^-20℃之间。Impact resistance and dynamic fracture toughness of H shaped steel is investigated using Zwick Amsler/Roell RKP 450 instrumented impact machine over a broad range of temperatures from 60℃ to 20℃. Results show that nearly all of the impact energy is consumed for crack initiation in the lower shelf range, In the ductile- to- brittle transition region and upper shelf range,the energy consumed during crack propagation is much higher than that during initiation. It is illustrated that ductile- to- brittle transition temperature of H-shaped steel is between-40℃ and -20℃.

关 键 词：型钢 冲击韧性 动态断裂韧性 韧脆转变温度 

分 类 号：TU502[建筑科学—建筑技术科学]