Influence of calcium treatment on cleanness and fatigue life of 60Si2MnA spring steel

被引：23

作者：

Hu, Y. ^{[1
]}

Chen, W. Q. ^{[1
]}

Han, H. B. ^{[2
]}

Bai, R. J. ^{[2
]}

机构：

[1] Univ Sci & Technol Beijing, State Key Lab Adv Met, Beijing 100083, Peoples R China

[2] Henan Jiyuan Iron & Steel Grp Co Ltd, Henan 459000, Peoples R China

来源：

IRONMAKING & STEELMAKING | 2017年 / 44卷 / 01期

关键词：

Spring steel; Calcium treatment; High basicity slag; T.[O; Inclusion; Void; Fatigue life; AL-KILLED STEEL; NONMETALLIC INCLUSIONS; SLAGS; MODEL;

D O I：

10.1080/03019233.2016.1153026

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

Contrasting experiments of Al killed 60Si2MnA spring steel were carried out between using and excluding calcium treatment under LF refining slags with low and high basicity ratios (R: CaO/SiO2 = 3.4, 5.0), respectively. Results showed the high basicity refining slag had a certain effect on controlling inclusions and improving the cleanness of spring steel similarly to calcium treatment. The T.[O] (total oxygen) content of steel without calcium treatment got to below 15 ppm and the fatigue life was long, up to 7.8 x 10(6) cycles. But in order to reduce the T.[O] below 10 ppm, as well as inclusion number and size in spring steel further, meanwhile, the appropriate calcium treatment should still be used. Besides, as the [Ca] content in the steel with calcium treatment increased, inclusions transformed from Al2O3-SiO2-CaO-MgO to Al2O3-SiO2-CaO-MgO-CaS completely, which reduced the formations of voids between inclusions and steel matrix, and voids decreased with the increase of CaO/Al2O3 value and CaS content of inclusions. Finally, the fatigue life of spring steel with high basicity slag and calcium treatment increased to 9.1 x 10(6) cycles.

引用

页码：28 / 35

页数：8

共 18 条

[1] Thermodynamic description of Al2O3-CaO-MnO and Al2O3-FeO-MnO melts -: a model approach [J].

Björkvall, J ;

Du, SC ;

Seetharaman, S .

CALPHAD-COMPUTER COUPLING OF PHASE DIAGRAMS AND THERMOCHEMISTRY, 2000, 24 (03) :353-376

[2]

Brooksbank D., 1970, TETSU TO HAGANE, V210, P246

[3] Thermodynamic Evaluation of Formation of Oxide-Sulfide Duplex Inclusions in Steel [J].

Choudhary, S. K. ;

Ghosh, A. .

ISIJ INTERNATIONAL, 2008, 48 (11) :1552-1559

[4] Observation of calcium aluminate inclusions at interfaces between Ca-treated, Al-killed steels and slags [J].

Coletti, B ;

Vantilt, S ;

Blanpain, B ;

Sridhar, S .

METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE, 2003, 34 (05) :533-538

[5] Modification of Al2O3 inclusions in medium carbon aluminium killed steels by AlCaFe additions [J].

Herrera, M ;

Castro, F ;

Castro, M ;

Méndez, M ;

Solís, H ;

Castellá, A ;

Barbaro, M .

IRONMAKING & STEELMAKING, 2006, 33 (01) :45-51

[6] Thermodynamic examination of inclusion modification and precipitation from calcium treatment to solidified steel [J].

Holappa, L ;

Hämäläinen, M ;

Liukkonen, M ;

Lind, M .

IRONMAKING & STEELMAKING, 2003, 30 (02) :111-115

[7]

Howard M., 1984, METALL T B, V15, P547

[8] Study on refining slags targeting high cleanliness and lower melting temperature inclusions in Al killed steel [J].

Jiang, M. ;

Wang, X. H. ;

Wang, W. J. .

IRONMAKING & STEELMAKING, 2012, 39 (01) :20-25

[9] Control of Non-metallic Inclusions by Slag-metal Reactions for High Strength Alloying Steels [J].

Jiang, M. ;

Wang, X. H. ;

Wang, W. J. .

STEEL RESEARCH INTERNATIONAL, 2010, 81 (09) :759-765

[10] OBSERVATION OF PRECIPITATES AND METALLOGRAPHIC GRAIN ORIENTATION IN STEEL BY A NON-AQUEOUS ELECTROLYTE-POTENTIOSTATIC ETCHING METHOD [J].

KUROSAWA, F ;

TAGUCHI, I ;

MATSUMOTO, R .

JOURNAL OF THE JAPAN INSTITUTE OF METALS, 1979, 43 (11) :1068-1077

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