Influence of non-metallic second phases on fatigue behaviour of high strength steel components

被引：7

作者：

González, L ^{[1
]}

Elvira, R ^{[1
]}

de Andoin, AG ^{[1
]}

Pizarro, R ^{[1
]}

Bertrand, C ^{[1
]}

机构：

[1] SIDENORI&D SA, Dept Prod, Basauri 48970, Spain

来源：

REVISTA DE METALURGIA | 2005年 / 41卷 / 01期

关键词：

fatigue; non-metallic inclusions; MnS; bearing steel; 100Cr6;

D O I：

10.3989/revmetalm.2005.v41.i1.185

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

To assess the real effect of the inclusion type on fatigue life of ultra clean high strength steels mechanical components made of 100Cr6 steel were fatigue tested and fracture surfaces analysed to determine the origin of fatigue cracks. Two heats proceeding from different steelmaking routes were taken for the tests. The material were forged into ring shape components which were fatigue tested under compression-compress ion loads. Failures were analysed by SFEM (Scanning Field Emission Microscopy), proving that most of failures at high loads were originated by manganese sulphides of small size (10-70 microns), while less than 40% of all fatigue cracks due to inclusions were caused by titanium carbonitrides and hard oxides. It has been demonstrated that once number and size of hard inclusions have been reduced, the hazardous effect of oxides and carbonitrides on the fatigue life decreases also. However, softer inclusions as manganese sulphides, currently considered as less hazardous, play a more relevant role as direct cause of fatigue failure and they Should be taken into account in a deeper way in order to balance both machinability and fatigue life requirements in high strength steel components.

引用

页码：45 / 52

页数：8

共 11 条

[1] BROOKSBANK D, 1970, J IRON STEEL I, V208, P495
[2] BROOKSBANK D, 1972, JISI, P186
[3] BROOKSBANK D, 1970, JISI, P584
[4] BROOKSBANK D, 1968, J IRON STEEL I JUN, P595
[5] Rolling bearing material quality fatigue testing - Material quality life factors
Gabelli, A
Ioannides, S
Beswick, J
de Wit, G
Krock, H
Korenhof, B
Kerrigan, A
[J]. BEARING STEEL TECHNOLOGY, 2002, 1419 : 509 - 526
[6] Kiessling R., 1978, Non-metallic Inclusions in Steel
[7] LYNE CM, 1968, T ASM, V61, P10
[8] Mechanical properties of chromium steels for back up rolling rolls
Mammeri, A
Belzunce, FJ
Rodríguez, C
Torre, M
Poveda, S
García, J
[J]. REVISTA DE METALURGIA, 2003, 39 (02) : 107 - 113
[9] MONNOT J, 1986, REV METALL-PARIS, V83, P761
[10] Treadgold CJ, 2002, SIXTH INTERNATIONAL CONFERENCE ON CLEAN STEEL, P154

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