Effect of over-aging process on microstructure and properties of low-carbon cold-rolled steel for enameling

被引：0
|
作者：
Xue F. [1 ]
Dong F. [2 ]
Du L. [3 ]
Liu X. [3 ]
机构：
[1] College of Electrical Engineering, North China University of Science and Technology, Tangshan
[2] College of Metallurgy and Energy, North China University of Science and Technology, Tangshan
[3] State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang
来源：
Cailiao Yanjiu Xuebao | / 11卷 / 834-840期
基金：
中国国家自然科学基金;
关键词：
Cementite; Enamel steel; Fish-scale resistance; Metallic materials; Over-aging;
D O I：
10.11901/1005.3093.2015.483
中图分类号：
学科分类号：
摘要：
The effect of over-aging process on mechanical properties and hydrogen permeation behavior of a cold-rolled model low carbon steel sheet for enameling was investigated by means of a continuous annealing simulator, which aims to simulate the over-aging process in continuous annealing line in steel works. It was found that the cementite precipitates within grains became finer but possessed large volume fraction in the steel sheet annealed with the slow cooling over-aging process, in the contrast to the conventional isothermal over-aging process. The strength of sheets annealed with the slow cooling over-aging was slightly lower but with significantly enhanced elongation. With the increasing effect of hydrogen traps due to the higher amount of finer precipitates of cementite within ferrite grains, the hydrogen diffusion in the steel was hindered. The hydrogen diffusion coefficient, DL for the sheet annealed with using slow cooling over-aging process was reduced by approx. 18% in comparison with those with the conventional isothermal over-aging process. Therewith, the mechanical property and fish-scaling resistance of the low- carbon cold- rolled steel sheet for enameling can be significantly improved by this improved over-aging process. © All right reserved.
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页码：834 / 840
页数：6
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