Study on the Control of Rare Earth Metals and Their Behaviors in the Industrial Practical Production of Q420q Structural Bridge Steel Plate
Rare earth (RE) addition can refine and change the shape/distribution of inclusions in steel to improve its strength and toughness. In this paper, the control of RE, specifically Ce and La, and their behaviors in the practical industrial production of high-strength structural steel with 420 MPa yiel...
Main Authors: | , , , , , |
---|---|
Format: | Article |
Language: | English |
Published: |
MDPI AG
2018-04-01
|
Series: | Metals |
Subjects: | |
Online Access: | http://www.mdpi.com/2075-4701/8/4/240 |
id |
doaj-2d8f056931814e90b700ece8073e4de0 |
---|---|
record_format |
Article |
spelling |
doaj-2d8f056931814e90b700ece8073e4de02020-11-24T20:51:46ZengMDPI AGMetals2075-47012018-04-018424010.3390/met8040240met8040240Study on the Control of Rare Earth Metals and Their Behaviors in the Industrial Practical Production of Q420q Structural Bridge Steel PlateRensheng Chu0Yong Fan1Zhanjun Li2Jingang Liu3Na Yin4Ning Hao5Shougang Research Institute of Technology, Beijing 100043, ChinaDepartment of Materials Engineering, KU Leuven, Kasteelpark Arenberg 44, B-3001 Heverlee, BelgiumShougang Research Institute of Technology, Beijing 100043, ChinaShougang Research Institute of Technology, Beijing 100043, ChinaShougang Research Institute of Technology, Beijing 100043, ChinaShougang Research Institute of Technology, Beijing 100043, ChinaRare earth (RE) addition can refine and change the shape/distribution of inclusions in steel to improve its strength and toughness. In this paper, the control of RE, specifically Ce and La, and their behaviors in the practical industrial production of high-strength structural steel with 420 MPa yield strength were studied. In particular, the interactions between RE and Al, Nb, S, O were investigated, with the aim of improving the steel toughness and welding performance. The impact energy of the plate with RE is approximately 50 J higher than the regular plate without RE. The toughness of the plate from ladle furnace (LF) refining with RE addition is better than the one from Ruhrstahl and Hereaeus (RH) refining. The RE inclusions could induce the intragranular ferrite and refine the grain size to the preferred size. After welding at the heat input of 200 kJ/cm, the grain size at the heat affected zone was found to be the finest in the plate from the LF process with RE addition. Notably, the microstructure of ferrite was quasi-polygonal.http://www.mdpi.com/2075-4701/8/4/240structural steel platenonmetallic inclusionsrare earth control |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Rensheng Chu Yong Fan Zhanjun Li Jingang Liu Na Yin Ning Hao |
spellingShingle |
Rensheng Chu Yong Fan Zhanjun Li Jingang Liu Na Yin Ning Hao Study on the Control of Rare Earth Metals and Their Behaviors in the Industrial Practical Production of Q420q Structural Bridge Steel Plate Metals structural steel plate nonmetallic inclusions rare earth control |
author_facet |
Rensheng Chu Yong Fan Zhanjun Li Jingang Liu Na Yin Ning Hao |
author_sort |
Rensheng Chu |
title |
Study on the Control of Rare Earth Metals and Their Behaviors in the Industrial Practical Production of Q420q Structural Bridge Steel Plate |
title_short |
Study on the Control of Rare Earth Metals and Their Behaviors in the Industrial Practical Production of Q420q Structural Bridge Steel Plate |
title_full |
Study on the Control of Rare Earth Metals and Their Behaviors in the Industrial Practical Production of Q420q Structural Bridge Steel Plate |
title_fullStr |
Study on the Control of Rare Earth Metals and Their Behaviors in the Industrial Practical Production of Q420q Structural Bridge Steel Plate |
title_full_unstemmed |
Study on the Control of Rare Earth Metals and Their Behaviors in the Industrial Practical Production of Q420q Structural Bridge Steel Plate |
title_sort |
study on the control of rare earth metals and their behaviors in the industrial practical production of q420q structural bridge steel plate |
publisher |
MDPI AG |
series |
Metals |
issn |
2075-4701 |
publishDate |
2018-04-01 |
description |
Rare earth (RE) addition can refine and change the shape/distribution of inclusions in steel to improve its strength and toughness. In this paper, the control of RE, specifically Ce and La, and their behaviors in the practical industrial production of high-strength structural steel with 420 MPa yield strength were studied. In particular, the interactions between RE and Al, Nb, S, O were investigated, with the aim of improving the steel toughness and welding performance. The impact energy of the plate with RE is approximately 50 J higher than the regular plate without RE. The toughness of the plate from ladle furnace (LF) refining with RE addition is better than the one from Ruhrstahl and Hereaeus (RH) refining. The RE inclusions could induce the intragranular ferrite and refine the grain size to the preferred size. After welding at the heat input of 200 kJ/cm, the grain size at the heat affected zone was found to be the finest in the plate from the LF process with RE addition. Notably, the microstructure of ferrite was quasi-polygonal. |
topic |
structural steel plate nonmetallic inclusions rare earth control |
url |
http://www.mdpi.com/2075-4701/8/4/240 |
work_keys_str_mv |
AT renshengchu studyonthecontrolofrareearthmetalsandtheirbehaviorsintheindustrialpracticalproductionofq420qstructuralbridgesteelplate AT yongfan studyonthecontrolofrareearthmetalsandtheirbehaviorsintheindustrialpracticalproductionofq420qstructuralbridgesteelplate AT zhanjunli studyonthecontrolofrareearthmetalsandtheirbehaviorsintheindustrialpracticalproductionofq420qstructuralbridgesteelplate AT jingangliu studyonthecontrolofrareearthmetalsandtheirbehaviorsintheindustrialpracticalproductionofq420qstructuralbridgesteelplate AT nayin studyonthecontrolofrareearthmetalsandtheirbehaviorsintheindustrialpracticalproductionofq420qstructuralbridgesteelplate AT ninghao studyonthecontrolofrareearthmetalsandtheirbehaviorsintheindustrialpracticalproductionofq420qstructuralbridgesteelplate |
_version_ |
1716801301985099776 |