Q345B钢鱼尾板锻件断裂原因  

Fracture reason of Q345Bsteel fishtail forging

作　　者：闫利军 高拯铎 王宝强 YAN Lijun;GAO Zhengduo;WANG Baoqiang(Fushun Yongmao Construction Machinery Co.,Ltd.,Fushun 113006,China)

机构地区：[1]抚顺永茂建筑机械有限公司,抚顺113006

出　　处：《理化检验（物理分册）》2022年第10期58-60,共3页Physical Testing and Chemical Analysis(Part A:Physical Testing)

摘　　要：某Q345B钢鱼尾板锻件发生横向断裂,采用宏观观察、化学成分分析、扫描电镜分析、力学性能测试、金相检验等方法对鱼尾板的断裂原因进行分析。结果表明:Q345B钢中存在较多且较大的非金属夹杂物,导致鱼尾板锻件的冲击能量显著降低,严重影响了材料的韧性,当受到外力撞击时鱼尾板发生脆性断裂。The transverse fracture reason of a Q345Bsteel fishtail forging was analyzed by macroscopic observation,chemical composition analysis,scanning electron microscope analysis,mechanical property test and metallographic examination.The results show that there were many and large non-metallic inclusions in Q345B steel,resulting in a significantly reduced impact energy of fishtail forging,which seriously affected the toughness of the material.When the fishtail was impacted by external force,brittle fracture occured.

关 键 词：鱼尾板锻件 非金属夹杂物 冲击能量 脆性断裂 

分 类 号：TG115.5[金属学及工艺—物理冶金]