Effect of the Cr Content and Coiling Temperature on the Properties of Hot Rolled High Strength Lower Bainitic Steel

Lieven BRACKE; Wei XU

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Effect of the Cr Content and Coiling Temperature on the Properties of Hot Rolled High Strength Lower Bainitic Steel

机译：Cr含量和卷取温度对热轧高强度下贝氏体钢性能的影响

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The effect of the Cr content and the coiling temperature on the tensile properties and the micostructure of an ultra high strength hot rolled lower bainitic steel has been evaluated by lab simulations. It was shown that an increase in Cr reduces the yield strength, but increases the tensile strength and the elongation. This observation was made for both coiling temperatures (425℃ and 500℃) tested. For coiling at 500℃, the effect was directly attributed to the presence of an increasing fraction of secondary phases, mainly martensite-austenite islands. At low coiling temperature (425℃), a banded structure of granular and lower bainite occured. The granular bainite bands contained more martensite-austenite islands for the high Cr level, explaining the low yield strength, high tensile strength and high elongation. It was shown that the lower bainite forms prior to coiling, whereas the granular bainite forms during slow coil cooling. The yield and the tensile strength is higher for coiling at 425℃ compared to 500℃ as a consequence of a higher lower bainite fraction.

机译：通过实验室模拟评估了Cr含量和卷取温度对超高强度热轧低贝氏体钢的拉伸性能和微观组织的影响。结果表明，Cr的增加降低了屈服强度，但增加了抗拉强度和伸长率。在测试的两个卷取温度（425℃和500℃）下进行了该观察。对于500℃的卷取，其影响直接归因于次生相的增加，主要是马氏体-奥氏体岛。在较低的卷取温度（425℃）下，出现了带状的颗粒状和较低贝氏体的组织。高Cr含量的粒状贝氏体带包含更多的马氏体-奥氏体岛，这说明了低屈服强度，高拉伸强度和高伸长率。结果表明，下部贝氏体在卷取之前形成，而粒状贝氏体在缓慢卷取冷却期间形成。由于较低的贝氏体含量较高，在425℃卷取的屈服强度和抗拉强度高于500℃。

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来源
《ISIJ international》 |2015年第10期|2206-2211|共6页
作者
Lieven BRACKE; Wei XU;
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作者单位

ArcelorMittal Global R&D Ghent, Pres. J.F. Kennedylaan 3, 9060 Zelzate, Belgium;

ArcelorMittal Global R&D Ghent, Pres. J.F. Kennedylaan 3, 9060 Zelzate, Belgium;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
原文格式 PDF
正文语种 eng
中图分类
关键词
hot rolled ultra high strength steel; bainite; Cr content; coiling temperature; tensile properties; microstructure; segregation;

机译：热轧超高强度钢;贝氏体铬含量;卷取温度;拉伸性能微观结构隔离;

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1. Effect of the Cr Content and Coiling Temperature on the Properties of Hot Rolled High Strength Lower Bainitic Steel [J] . Lieven Bracke, Wei Xu ISIJ international . 2015,第10期

机译：Cr含量和卷取温度对热轧高强度下贝氏体钢性能的影响
2. Effect of Coiling Temperature on the Microstructure and Mechanical Properties of Hot-Rolled Ti-Nb Microalloyed Ultra High Strength Steel [J] . Patra Pradip K., Sam Srimanta, Singhai Mrigandra, Transactions of the Indian Institute of Metals . 2017,第7期

机译：卷取温度对热轧Ti-Nb微合金超高强度钢组织和力学性能的影响
3. Effects of Coiling Temperature on Microstructure and Mechanical Properties of High-strength Hot-rolled Steel Plates Containing Cu, Cr and Ni [J] . Sung-Joon KIM, Chang Gil LEE, Tae-Ho LEE ISIJ international . 2000,第7期

机译：卷取温度对含Cu，Cr和Ni的高强度热轧钢板组织和力学性能的影响
4. Effects of Coiling Temperature on Strength, Yield Ratio and Precipitation Behaviors of Hot Rolled High Strength Microalloyed Steel for Cold Forming [C] . XU Jian-qiu, JIA Yue-cai, LI Hua-long The 6th international conference on high strength low alloy steels. . 2011

机译：卷取温度对冷弯热轧高强度微合金钢强度，屈服比和析出行为的影响
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机译：高强度管线钢和热轧微合金钢的流线型合金设计和热机械加工参数：工艺-结构-性能范式
6. Effect of Coiling Temperature on Microstructure Properties and Resistance to Fish-Scaling of Hot Rolled Enamel Steel [O] . Yang Zhao, Xueqi Huang, Bo Yu, 2017

机译：卷取温度对热轧搪瓷钢组织性能和耐水垢性能的影响
7. Mechanical properties of various concrete after high temperature exposure Mechanical property of various types of concrete after high temperature exposure is investigated. Considering compressive strength requirement for a vertical element in high rise building, concrete specimens with various design strengths of 35, 80, 100, and 150 MPa were tested. Particularly, the influence of incorporated steel fiber on fire resistance is of interest in this study. Experimental results show that the fire resistance depends on the design strength and steel fiber content. Normal strength concrete (NSC) of a design strength of 35 MPa or high performance concrete (HPC) of 80-100 MPa does not spall when exposed to 100-400 °C of temperature. However, an explosive spalling occurs at 300 °C when the HPCs contain 1 vol. of steel fiber. Ultra-high performance concrete (UHPC) of a design strength of 150 MPa and 1.5 vol. of steel fiber also shows dramatic spalling at 300 °C. The experimental results found in this study can contribute to a better understanding of the behaviors of HPC and UHPC under fire and the role of steel fiber on the fire resistance. [O] . 2017

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Effect of the Cr Content and Coiling Temperature on the Properties of Hot Rolled High Strength Lower Bainitic Steel

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