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Abstract

Isothermal spheroidising annealing treatment is a vital step for hot-rolled 100Cr6 bearing ring to transform the lamellar pearlite into granular pearlite, which can improve the structure and cutability of the bearing ring. In this study, the effect of spheroidising annealing parameters on the microstructure of a hot-rolled 100Cr6 bearing ring was studied. The results show that annealing temperature and holding time have a great effect on the size and roundness of carbide particles, while the annealing cooling rate just has a significant effect on the carbide particles’ size. A series of mechanical tests indicate that all annealing parameters have a great influence on the tensile strength, plasticity and hardness, but make no difference on the elasticity. Considering the machinability and working performance, the rational annealing temperature, holding time and rapid cooling rate should be chosen.

This paper is part of a Themed Issue on Recent developments in bearing steels.

Keywords

100Cr6 bearing ring Spheroidising annealing Carbide particles Mechanical property

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References

Hua

and Han

: ‘The application of ring cold rolling technology in the bearing industry’, Hot Work. Tech., 2008, 37, (7), 17–19.

Gol

A. K.

and Amiri

M. S.

: ‘Spheroidizing kinetics and optimization of heat treatment parameters in CK60 steel using Taguchi robust Design’, J. Iron Steel Res., 2010, 17, (4), 45–52. doi: 10.1016/S1006-706X(10)60085-4

Tian

Y. L.

and Kraft

R. W.

: ‘Mechanisms of pearlite spheroidization’, Metall. Trans. A, 1987, 18, (8), 1403–1414. doi: 10.1007/BF02646654

Baranova

V. A.

and Sukhomlin

G. D.

: ‘Spheroidization of cementite in steel’, Met. Sci. Heat Treat., 1981, 23, (11), 798–802. doi: 10.1007/BF00712544

Chattopadhyay

and Sellars

C. M.

: ‘Kinetics of pearlite spheroidisation during static annealing and during hot deformation’, Acta Metall., 1982, 30, (1), 157–170. doi: 10.1016/0001-6160(82)90055-4

Atasoy

Ö. E.

and Özbilen

: ‘Pearlite spheroidization’, J. Mater. Sci., 1989, 24, (1), 281–287. doi: 10.1007/BF00660968

Lian

and Liu

: ‘Spheroidization process in large-deformed high-carbon steel’, Baosteel. Tech. Research, 2014, 8, 24–28.

Karadeniz

: ‘Influence of different initial microstructure on the process of spheroidization in cold forging’, Mater. Des., 2008, 29, (1), 251–256. doi: 10.1016/j.matdes.2006.11.015

Yang

, Wang

and Zhu

: ‘Spheroidizing growth mechanism of cementite in 100Cr6 bearing steel’, Trans. Mater. Heat Treat., 2012, 33, (8), 79–83.

10.

, Hua

and Shao

: ‘Influence of the annealing cooling rate on the microstructure evolution and deformation behaviours in the cold ring rolling of medium steel’, Mater. Des., 2011, 32, 2292–2300. doi: 10.1016/j.matdes.2010.11.007

11.

Wei

and Wu

: ‘Effect of annealing cooling rate on microstructure and mechanical property of 100Cr6 steel ring manufactured by cold ring rolling process’, J. Cent. South Univ. Tech., 2014, 21, (1), 14–19. doi: 10.1007/s11771-014-1909-4

12.

Wei

, Robert

, Xu

and Li

: ‘On the critical radius in generalized Ostwald ripening’, J. Zhejiang. Univ. Sci. B, 2005, 6, (8), 705–707.

13.

Baldan

: ‘Progress in Ostwald ripening theories and their applications to nickel-base superalloys. Part 1: Ostwald ripening theories’, J. Mater. Sci., 2002, 37, (11), 2171–2202. doi: 10.1023/A:1015388912729

14.

Voorhees

P. W.

: ‘The theory of Ostwald ripening’, J. Stat. Phys., 1985, 38, 231–253, doi: 10.1007/BF01017860

15.

Yang

, Ma

, Zu

and Liu

: ‘Effect of cyclic spheroidizing annealing on microstructure and mechanical properties of 100Cr6 bearing steel’, Heat Treat. Met., 2009, 34, (1), 33–36.

16.

Dai

: ‘100Cr6 steel spheroidizing annealing design’, J. Wuhan. Univ. Tech., 2002, 26, (1), 138–140.

17.

Guo

, Huo

and Dong

: ‘Effect of austenitizing time on spheroidized microstructure of 100Cr6 bearing steel’, Iron Steel. Van. Ti, 2013, 34, (1), 99–103.

18.

Zhang

and Wu

: ‘Materials of iron and steel’, 1992, Beijing, Metallurgy Industry Press.

19.

Brien

, James

and Hosford

W. F.

: ‘Spheroidization cycles for medium carbon steels’, Metal. Mater. Trans. A, 2002, 33, (4), 1255–1261. doi: 10.1007/s11661-002-0226-y

20.

Yong

: ‘The second phase of steel materials’, 2006, Beijing, Metallurgy Industry Press.

21.

Cui

: ‘Principle of metallography and heat treatment’, 2006, Beijing, Harbin Institute of Technology Press.

22.

Chang

, Liu

, Wang

and Yu

: ‘Spheroidization and Ostwald growth of carbide in isothermal process of hot-deformed high carbon chromium cast steel’, J. Iron Steel Res., 2003, 10, (1), 36–39.

23.

Liu

: ‘The pearlite transformation and annealing’, 2007, Beijing, Chemical Industry Press.

Effect of annealing parameters on microstructure and mechanical property of hot-rolled 100Cr6 bearing ring

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