1 School of Materials Science and Engineering, Shenyang University of Technology, Shenyang 110870, China 2 Nuclear Power Pump Industry Co., Ltd., Shenyang Blower Works Group Corporation, Shenyang 110869, China
The surface treatment was carried out on the surface of materials of A473M martensitic stainless steel axle sleeve by rolling technology, aiming to investigate the effect on its mechanical properties. The surface morphology and roughness, residual stress, microhardness, tensile and fatigue property were systematically studied using the SEM, white light interferometer, X-ray diffractometer, microhardness tester, EBSD, tensile tester and fatigue tester. The results show that the surface roughness of rolling specimen reduces significantly, which is about 1/5 of that of turning surface. The residual compression stress is induced near surface by rolling processing, the maximum value can reach up to 946 MPa and the residual compression stress decreases along with the depth. The thickness of the residual compression stress layer is about 200 μm. In addition, the rolling surface microhardness can be improved by 30% compared with that of turning surface and the hardened layer can be about 200 μm. As for mechanical properties, the tensile strength, yield strength and elongation of rolling specimens increase about 40%, 22% and 8% respectively compared with that of turning specimens. The fatigue life increases from 5.4×104 cycles to 1×107 cycles after rolling processing. The mechanical properties of the rolled material significantly improve, and the fatigue life significantly increases.
MA T Y , WANG P F , XU Z B , et al. Flow distribution of heat exchanger tubes in a steam generator and its effect on flow field at entrance of reactor coolant pump[J]. Nuclear Power Engineering, 2018, 39 (4): 58- 62.
ZHANG L P , CAI L . Nuclear main pump technology for domestic small pressurized water reactor nuclear power plant[J]. Pump Technology, 2018, (5): 1- 4.
HU Q X , ZHAO X M , MAO X Y , et al. Cold rolling process on MFT8 non quenched and tempered steel surface for fasteners[J]. Heat Treatment of Metals, 2016, 41 (4): 137- 141.
4
MISHRA V D , RAO B C , MURTHY H . Enhancement of mechanical properties by cold-rolling of Al6061[J]. Materials Today Proceedings, 2018, 5 (2): 8263- 8270.
REN X C , CHEN L Q , LIU X G , et al. Effects of surface ultrasonic rolling processing on fatigue properties of axle steel used on high speed train[J]. Journal of Materials Engineering, 2015, 43 (12): 1- 5.
6
NAGARAJAN B , KUMAR D , FAN Z , et al. Effect of deep cold rolling on mechanical properties and microstructure of nickel-based superalloys[J]. Materials Science and Engineering:A, 2018, 728, 196- 207.
YE H , LAI L S , LI J , et al. Surface properties of 7075 aluminum alloy workpieces after ultrasonic burnishing processing[J]. Surface Technology, 2018, 47 (2): 8- 13.
ZHENG J X , JIANG S X . Residual stress field in the process of 2D ultrasonic rolling 7050 aluminum alloy[J]. Surface Technology, 2017, 46 (12): 265- 269.
BA D M , SUN X F , QIU J , et al. Tribological behavior of low temperature ion sulphurizing layer based on nanocrystalline under oil lubrication[J]. China Surface Engineering, 2017, 30 (6): 140- 148.
11
NAKATA T , XU C , UEHARA Y , et al. Origin of texture weakening in a rolled ZEX4101 alloy sheet and its effect on room temperature formability and tensile property[J]. Journal of Alloys and Compounds, 2019, 782, 304- 314.
LIU Y , WANG D P , DENG C Y , et al. Microstructure and properties of Al2O3 films on Ti-6Al-4V using ultrasonic surface rolling processing[J]. Journal of Materials Engineering, 2015, 43 (7): 8- 13.
13
KONG X , DING S , YANG H , et al. Effects of sizes and mechanical properties of fuel coupon on the rolling simulation results of monolithic fuel plate blanks[J]. Nuclear Engineering and Technology, 2018, 50 (8): 1330- 1338.
CHEN L Q , XIANG B , REN X C , et al. Influences of surface ultrasonic rolling processing parameters on surface condition of axle steel used in high speed trains[J]. China Surface Engineering, 2014, 27 (5): 96- 101.
15
EI-HADDAD M H , POOK L P , TOPPER K J . Metal fatigue[M]. London: Oxford University, 1974: 130- 195.
ZHANG F , ZHAO Y C . Research on surface characteristics and fatigue properties of 45# steel by ultrasonic surface rolling[J]. Surface Technology, 2017, 46 (9): 185- 190.
WU S S , SUN H L , YANG Q . Fatigue life analysis of harmonic reducer flexspline based on cold rolling process[J]. Journal of Mechanical Transmission, 2019, 43 (1): 131- 135.
YU Z M.Research on key technologies of cold rolling for flexspline of harmonic reducer[D].Guangzhou: South China University of Technology, 2017: 66-67.
YU B Q , LI W , XUE J H , et al. Prediction of bending fatigue life for gears based on dynamic load spectra[J]. Journal of University of Science and Technology Beijing, 2013, 35 (6): 813- 817.
SHAO C W , CHEN S L , ZHAO X L , et al. High-cycle fatigue property of high vanadium medium-carbon microalloyed steel[J]. Heat Treatment of Metals, 2014, 39 (2): 19- 22.
ZHANG S Y , ZHOU Z M , WU X S , et al. Trace rolling strengthening technology of steep-pitch nonstandard thread[J]. Surface and Coatings Technology, 2015, 40 (4): 135- 138.
22
SUN J , JIANG T , WANG Y , et al. Effect of grain refinement on high-carbon martensite transformation and its mechanical properties[J]. Materials Science and Engineering:A, 2018, 726, 342- 349.
ZHANG F , SHANGGUAN X C . Effect of surface ultrasonic rolling processing on fatigue properties of AISI304 austenite stainless steel[J]. Hot Working Technology, 2017, 46 (16): 144- 148.
2020, Vol. 48 
), 谭俊哲2, 关锰2, 陶邵佳2, 张春华1
