Effects of Cooling Paths on Through-Thickness Microstructure and Mechanical Properties of Heavy Gauge X80 Pipeline Steel

被引：0
|
作者：
Xu-Dong Li [1 ]
Cheng-Ning Li [1 ]
Guo Yuan [1 ]
Guo-Dong Wang [1 ]
机构：
[1] State Key Laboratory of Rolling and Automation,Northeastern University
来源：
Acta Metallurgica Sinica(English Letters) | 2017年 / 30卷 / 05期
基金：
中国国家自然科学基金; 中央高校基本科研业务费专项资金资助;
关键词：
X80 pipeline steel; Ultra-fast cooling; Cooling path; Finite difference method; Microstructure; Mechanical properties;
D O I：
暂无
中图分类号：
TG142.1 [钢的组织与性能];
学科分类号：
080502 ;
摘要：
The effects of various cooling paths on uniformity of through-thickness microstructure and mechanical properties of X80 pipeline steel of 22.0 mm in thickness were studied. The finite difference method was employed to calculate the temperature field during cooling. It was confirmed by the experimental result and temperature field calculation that the optimizing process was achieved by the ultra-fast cooling with medium cooling capacity(cooling rate of *23 K/s)followed by ultimate cooling capacity(cooling rate of *50 K/s). After optimization, the experimental steel displayed much uniform microstructure and the deviation of through-thickness hardness was controlled within 20 HV. In addition,the yield strength, tensile strength and elongation of the experimental steel were 621, 728 MPa and 21.5%, respectively,meeting the requirements of the API standard for X80 pipeline steels.
引用
收藏
页码：483 / 492
页数：10
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