Influence of Nb on the Structure and High Temperature Performance of Billet for High-Rise Structural Steel

Reasonable control of the niobium (Nb) content in steel slabs is of great significance for improving the surface quality of the slabs. In this study, a Gleeble-3500 thermal simulation testing machine was used to test the high-temperature mechanical properties of steel slabs with four different Nb co...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Jingyi Zhou, Liguang Zhu, Ligen Sun, Bo Wang, Pengcheng Xiao
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	high-rise structural steel high-temperature mechanical property second phase particle precipitation behavior Mining engineering. Metallurgy TN1-997
Acceso en línea:	https://doaj.org/article/2991e24198264fd0818e0f2c5c53ab5d
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:2991e24198264fd0818e0f2c5c53ab5d
record_format	dspace
spelling	oai:doaj.org-article:2991e24198264fd0818e0f2c5c53ab5d2021-11-25T18:21:28ZInfluence of Nb on the Structure and High Temperature Performance of Billet for High-Rise Structural Steel10.3390/met111117212075-4701https://doaj.org/article/2991e24198264fd0818e0f2c5c53ab5d2021-10-01T00:00:00Zhttps://www.mdpi.com/2075-4701/11/11/1721https://doaj.org/toc/2075-4701Reasonable control of the niobium (Nb) content in steel slabs is of great significance for improving the surface quality of the slabs. In this study, a Gleeble-3500 thermal simulation testing machine was used to test the high-temperature mechanical properties of steel slabs with four different Nb contents (A: 0.006%, B: 0.031%, C: 0.050%, D: 0.065%) and to analyze the effect of Nb on the high-temperature performance of the steel slabs. Optical microscopy and transmission electron microscopy (TEM) were used to study the microstructure of the casting slabs with different Nb contents and the precipitation in the samples after heat treatment at different temperatures. The results of the study show that the microstructure of the cast slab is mainly composed of ferrite and pearlite. The distribution of each of the two structures was found to become more uniform and a significant improvement in yield strength was observed with increasing Nb content. After heat treatment, the precipitates in the high-rise structural steel were mainly square and star shaped Nb(C,N) precipitates. Increasing the Nb content was found to increase the amount of precipitates in steel. Beyond a threshold, increasing the Nb content did not increase the amount of precipitates. However, the size of the precipitates increased.Jingyi ZhouLiguang ZhuLigen SunBo WangPengcheng XiaoMDPI AGarticlehigh-rise structural steelhigh-temperature mechanical propertysecond phase particleprecipitation behaviorMining engineering. MetallurgyTN1-997ENMetals, Vol 11, Iss 1721, p 1721 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	high-rise structural steel high-temperature mechanical property second phase particle precipitation behavior Mining engineering. Metallurgy TN1-997
spellingShingle	high-rise structural steel high-temperature mechanical property second phase particle precipitation behavior Mining engineering. Metallurgy TN1-997 Jingyi Zhou Liguang Zhu Ligen Sun Bo Wang Pengcheng Xiao Influence of Nb on the Structure and High Temperature Performance of Billet for High-Rise Structural Steel
description	Reasonable control of the niobium (Nb) content in steel slabs is of great significance for improving the surface quality of the slabs. In this study, a Gleeble-3500 thermal simulation testing machine was used to test the high-temperature mechanical properties of steel slabs with four different Nb contents (A: 0.006%, B: 0.031%, C: 0.050%, D: 0.065%) and to analyze the effect of Nb on the high-temperature performance of the steel slabs. Optical microscopy and transmission electron microscopy (TEM) were used to study the microstructure of the casting slabs with different Nb contents and the precipitation in the samples after heat treatment at different temperatures. The results of the study show that the microstructure of the cast slab is mainly composed of ferrite and pearlite. The distribution of each of the two structures was found to become more uniform and a significant improvement in yield strength was observed with increasing Nb content. After heat treatment, the precipitates in the high-rise structural steel were mainly square and star shaped Nb(C,N) precipitates. Increasing the Nb content was found to increase the amount of precipitates in steel. Beyond a threshold, increasing the Nb content did not increase the amount of precipitates. However, the size of the precipitates increased.
format	article
author	Jingyi Zhou Liguang Zhu Ligen Sun Bo Wang Pengcheng Xiao
author_facet	Jingyi Zhou Liguang Zhu Ligen Sun Bo Wang Pengcheng Xiao
author_sort	Jingyi Zhou
title	Influence of Nb on the Structure and High Temperature Performance of Billet for High-Rise Structural Steel
title_short	Influence of Nb on the Structure and High Temperature Performance of Billet for High-Rise Structural Steel
title_full	Influence of Nb on the Structure and High Temperature Performance of Billet for High-Rise Structural Steel
title_fullStr	Influence of Nb on the Structure and High Temperature Performance of Billet for High-Rise Structural Steel
title_full_unstemmed	Influence of Nb on the Structure and High Temperature Performance of Billet for High-Rise Structural Steel
title_sort	influence of nb on the structure and high temperature performance of billet for high-rise structural steel
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/2991e24198264fd0818e0f2c5c53ab5d
work_keys_str_mv	AT jingyizhou influenceofnbonthestructureandhightemperatureperformanceofbilletforhighrisestructuralsteel AT liguangzhu influenceofnbonthestructureandhightemperatureperformanceofbilletforhighrisestructuralsteel AT ligensun influenceofnbonthestructureandhightemperatureperformanceofbilletforhighrisestructuralsteel AT bowang influenceofnbonthestructureandhightemperatureperformanceofbilletforhighrisestructuralsteel AT pengchengxiao influenceofnbonthestructureandhightemperatureperformanceofbilletforhighrisestructuralsteel
_version_	1718411246113390592

Influence of Nb on the Structure and High Temperature Performance of Billet for High-Rise Structural Steel

Ejemplares similares