超高强度抗震钢筋反弯断裂研究与改进  

Research and Improvement on Backbending Fracture of Ultra-high Strength Seismic Rebar

作　　者：卢春光 张泽宇 林生秀 李博 王小东 史永刚 姜新岩 Lu Chunguang;Zhang Zeyu;Lin Shengxiu;Li Bo;Wang Xiaodong;Shi Yonggang;Jiang Xinyan(Shaanxi Iron and Steel Group Industrial Innovation Research Institute Co.,Ltd.,Hanzhong Shaanxi 723000)

机构地区：[1]陕钢集团产业创新研究院有限公司,陕西汉中723000

出　　处：《山西冶金》2022年第6期13-14,共2页Shanxi Metallurgy

摘　　要：针对某钢铁企业在开发超高强度抗震钢筋时产品检验中存在反弯断裂的情况,通过对比分析超高强度抗震钢筋反弯断裂试样和合格试样的化学成分、气体含量、性能、非金属夹杂、金相组织和断口等,查找反弯断裂的原因。结果表明,冷速过快,组织由奥氏体转变为网状铁素体+大块状珠光体,钢材韧性变差,是导致超高强度抗震钢筋反弯断裂的主要原因。In view of the fact that there is reverse bending fracture in the product inspection during the development of ultra-high strength seismic reinforcement in an iron and steel enterprise,the causes of reverse bending fracture are found by comparing and analyzing the chemical composition,gas content,performance,non-metallic inclusions,metallographic organization and fracture of the ultra-high strength seismic reinforcement reverse bending fracture specimen and the qualified specimen.The results show that if the cooling rate is too fast,the microstructure changes from austenite to reticulated ferrite+bulk pearlite,which leads to the deterioration of steel toughness,which is the main reason for the reverse bending fracture of ultra-high-strength seismic-resistant steel bars.

关 键 词：超高强度抗震钢筋 反弯断裂 气体含量 铁素体 珠光体 冷速 

分 类 号：TG142[一般工业技术—材料科学与工程]