Effect of pretreated microstructure on the morphology and mechanical properties of low-carbon steel with IQ&P treatment
The effects of pretreated microstructure on the multiphase microstructure features at room temperature and the mechanical properties of low-carbon steel were studied by the treatment of water cooling after hot-rolling in the γ phase region or in the γ + α phase region followed by the treatment of in...
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Science Press
2016-02-01
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| Series: | 工程科学学报 |
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| Online Access: | http://cje.ustb.edu.cn/article/doi/10.13374/j.issn2095-9389.2016.02.010 |
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| author | CHEN Lian-sheng ZHANG Jian-yang TIAN Ya-qiang SONG Jin-ying XU Yong ZHANG Shi-hong |
| author_facet | CHEN Lian-sheng ZHANG Jian-yang TIAN Ya-qiang SONG Jin-ying XU Yong ZHANG Shi-hong |
| author_sort | CHEN Lian-sheng |
| collection | DOAJ |
| description | The effects of pretreated microstructure on the multiphase microstructure features at room temperature and the mechanical properties of low-carbon steel were studied by the treatment of water cooling after hot-rolling in the γ phase region or in the γ + α phase region followed by the treatment of intercritical reheating-quenching-partitioning (IQ&P). Two different pretreated microstructures, which are martensite and martensite + ferrite, are obtained by the two different hot-rolling and quenching processes. After IQ&P, the steel with martensite as pretreated microstructure, in which the volume fraction of retained austenite is 8. 2%, is turned into a multi-phase structure composed of lath intercritical ferrite, block tempered martensite, needle-like untempered martensite, and retained austenite. While the steel with martensite + ferrite as pretreated microstructure, in which the volume fraction of retained austenite is 14. 3%, is turned into a multi-phase structure composed of lath intercritical ferrite, block or needle-like untempered martensite, and short needle-like or block retained austenite. With the same IQ&P process parameters, the tensile strength of the steel with martensite as pretreated microstructure is 770 MPa, the elongation is 28%, and the product of strength and elongation is 21560 MPa·%. While the tensile strength of the steel with martensite + ferrite as pretreated microstructure is 834 MPa, the elongation increases to 36. 2%, and the product of strength and elongation reaches to 30190 MPa·%. In other words, the steel has obtained a good combination of strength and ductility. |
| format | Article |
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| institution | OA Journals |
| issn | 2095-9389 |
| language | zho |
| publishDate | 2016-02-01 |
| publisher | Science Press |
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| series | 工程科学学报 |
| spelling | doaj-art-c9f7af7dd3f7497e9da6f7982d6b80852025-08-20T01:47:51ZzhoScience Press工程科学学报2095-93892016-02-0138222322910.13374/j.issn2095-9389.2016.02.010Effect of pretreated microstructure on the morphology and mechanical properties of low-carbon steel with IQ&P treatmentCHEN Lian-sheng0ZHANG Jian-yang1TIAN Ya-qiang2SONG Jin-ying3XU YongZHANG Shi-hong41. School of Metallurgy and Energy Engineering, Hebei United University, Tangshan 063009, China;1. School of Metallurgy and Energy Engineering, Hebei United University, Tangshan 063009, China;1. School of Metallurgy and Energy Engineering, Hebei United University, Tangshan 063009, China;1. School of Metallurgy and Energy Engineering, Hebei United University, Tangshan 063009, China;2. Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, ChinaThe effects of pretreated microstructure on the multiphase microstructure features at room temperature and the mechanical properties of low-carbon steel were studied by the treatment of water cooling after hot-rolling in the γ phase region or in the γ + α phase region followed by the treatment of intercritical reheating-quenching-partitioning (IQ&P). Two different pretreated microstructures, which are martensite and martensite + ferrite, are obtained by the two different hot-rolling and quenching processes. After IQ&P, the steel with martensite as pretreated microstructure, in which the volume fraction of retained austenite is 8. 2%, is turned into a multi-phase structure composed of lath intercritical ferrite, block tempered martensite, needle-like untempered martensite, and retained austenite. While the steel with martensite + ferrite as pretreated microstructure, in which the volume fraction of retained austenite is 14. 3%, is turned into a multi-phase structure composed of lath intercritical ferrite, block or needle-like untempered martensite, and short needle-like or block retained austenite. With the same IQ&P process parameters, the tensile strength of the steel with martensite as pretreated microstructure is 770 MPa, the elongation is 28%, and the product of strength and elongation is 21560 MPa·%. While the tensile strength of the steel with martensite + ferrite as pretreated microstructure is 834 MPa, the elongation increases to 36. 2%, and the product of strength and elongation reaches to 30190 MPa·%. In other words, the steel has obtained a good combination of strength and ductility.http://cje.ustb.edu.cn/article/doi/10.13374/j.issn2095-9389.2016.02.010low-carbon steelmultiphase steelpretreated microstructuremorphologymechanical properties |
| spellingShingle | CHEN Lian-sheng ZHANG Jian-yang TIAN Ya-qiang SONG Jin-ying XU Yong ZHANG Shi-hong Effect of pretreated microstructure on the morphology and mechanical properties of low-carbon steel with IQ&P treatment 工程科学学报 low-carbon steel multiphase steel pretreated microstructure morphology mechanical properties |
| title | Effect of pretreated microstructure on the morphology and mechanical properties of low-carbon steel with IQ&P treatment |
| title_full | Effect of pretreated microstructure on the morphology and mechanical properties of low-carbon steel with IQ&P treatment |
| title_fullStr | Effect of pretreated microstructure on the morphology and mechanical properties of low-carbon steel with IQ&P treatment |
| title_full_unstemmed | Effect of pretreated microstructure on the morphology and mechanical properties of low-carbon steel with IQ&P treatment |
| title_short | Effect of pretreated microstructure on the morphology and mechanical properties of low-carbon steel with IQ&P treatment |
| title_sort | effect of pretreated microstructure on the morphology and mechanical properties of low carbon steel with iq p treatment |
| topic | low-carbon steel multiphase steel pretreated microstructure morphology mechanical properties |
| url | http://cje.ustb.edu.cn/article/doi/10.13374/j.issn2095-9389.2016.02.010 |
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