含铜耐候钢热轧开裂现象分析  

Analysis on Cracking Phenomenon of a Hot-rolling Cu-bearing Weathering Steel

作　　者：王雷 董俊华[2] 顾怀章 柯伟[3] WANG Lei;DONG Junhua;GU Huaizhang;KE Wei(School of Life and Health Science,Kaili University,Kaili 556011,China;Shenyang National Laboratory for Matericals Science,Institute of Metals Research,Chinese Academy of Sciences,Shenyang 110016,China;Environmental Corrosion Research Center for Materials,Institute of Metals Research,Chinese Academy of Sciences,Shenyang 110016,China)

机构地区：[1]凯里学院理学院,凯里556011 [2]中国科学院金属研究所沈阳材料科学国家研究中心,沈阳110016 [3]中国科学院金属研究所材料环境腐蚀研究中心,沈阳110016

出　　处：《中国腐蚀与防护学报》2022年第5期845-850,共6页Journal of Chinese Society For Corrosion and Protection

基　　金：凯里学院博士启动项目(BS201814);国家自然科学基金(31760191)。

摘　　要：通过微观形貌观察及EPMA面扫描对钢中元素分布情况的观察分析,对热轧含铜耐候钢开裂部位进行了研究。对Mn、S在热轧含铜钢及氧化皮中的分布特征进行了初步讨论,对比分析了富Cu相在热轧和未轧制含铜钢中不同的富集特征,提出了热轧含Cu耐候钢裂纹开裂的三种模式,在热轧应力的作用下,钢晶界氧化、晶界处钢的内氧化与富Cu相在裂纹中的富集都会促使钢进一步发生较严重的开裂。The cracking phenomenon of a hot-rolled Cu-bearing weathering steel was analyzed by means of micromorphology observation and EPMA surface examination.The distribution characteristics of Mn and S in the hot-rolled Cu-bearing steel and the formed oxide scale are preliminarily assessed,the different enrichment characteristics of Cu-rich phase in copper-bearing steels before and after hot-rolling are comparatively analyzed,and three modes of cracking of hot-rolled Cu bearing weathering steel are put forward.With the synergistic action of hot rolling stress,the grain boundary oxidation,internal oxidation of steel at grain boundary and the enrichment of Cu rich phase in the crack will promote the further serious cracking of the steel.

关 键 词：含铜钢 开裂 富Cu相 钢/氧化皮界面 

分 类 号：TG142[一般工业技术—材料科学与工程]