含铜耐候钢热轧开裂现象分析

doi:10.11902/1005.4537.2021.261

中国腐蚀与防护学报

2022, Vol. 42

Issue (5): 845-850 DOI: 10.11902/1005.4537.2021.261

海洋材料腐蚀与防护专栏

本期目录 | 过刊浏览

含铜耐候钢热轧开裂现象分析

王雷¹(

), 董俊华², 顾怀章¹, 柯伟³

^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

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

WANG Lei¹(

), DONG Junhua², GU Huaizhang¹, KE Wei³

^1.School of Life and Health Science, Kaili University, Kaili 556011, China
^2.Shenyang National Laboratory for Matericals Science, Institute of Metals Research, Chinese Academy of Sciences, Shenyang 110016, China
^3.Environmental Corrosion Research Center for Materials, Institute of Metals Research, Chinese Academy of Sciences, Shenyang 110016, China

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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。

关键词 ：含铜钢, 开裂, 富Cu相, 钢/氧化皮界面

Abstract：

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.

Key words： Cu-containing steel cracking Cu rich phase steel/scale interface

收稿日期: 2021-09-27

ZTFLH:

TG142

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

通讯作者: 王雷 E-mail: 2015163582@qq.com

Corresponding author: WANG Lei E-mail: 2015163582@qq.com

作者简介: 王雷,男,1970年生,博士,副教授

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引用本文:

王雷, 董俊华, 顾怀章, 柯伟. 含铜耐候钢热轧开裂现象分析[J]. 中国腐蚀与防护学报, 2022, 42(5): 845-850.
Lei WANG, Junhua DONG, Huaizhang GU, Wei KE. Analysis on Cracking Phenomenon of a Hot-rolling Cu-bearing Weathering Steel. Journal of Chinese Society for Corrosion and protection, 2022, 42(5): 845-850.

链接本文:

https://www.jcscp.org/CN/10.11902/1005.4537.2021.261 或 https://www.jcscp.org/CN/Y2022/V42/I5/845

图1 热轧后耐候钢边角部位开裂形貌

图2 含铜耐候钢中心部位和龟裂部位光学显微形貌及微观组织SEM形貌

图3 含铜耐候钢龟裂部位光学显微形貌

图4 含铜耐候钢龟裂部位光学显微形貌及SEM形貌

图5 含铜耐候钢龟裂部位及非龟裂部位背散射电子图像及Cu、Mn、S、O、Fe分布

图6 贯穿性裂纹中富铜相形貌图

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