DONG Zheng,YANG Cong,GU Bangping,et al. Effects of ultrasonic impact treatment on surface residual stress and electrochemical properties of 42CrMo4 steel[J]. Journal of Mechanical Strength,2026,48(1):93-99.
To solve the problems that 42CrMo4 steel (commonly used in mechanical components bearing dynamic loads) has reduced service life due to residual tensile stress and is susceptible to corrosion in harsh environments
the regulatory effect of ultrasonic impact treatment on its surface residual stress and electrochemical properties was investigated.
Methods
2
Firstly
42CrMo4 steel samples were treated with ultrasonic impact for 0
4
and 8 minutes (current 2.0 A
frequency 40 kHz). Secondly
their microstructures were characterized by a ultra-depth-of-field 3D digital microscope
and their microhardness was tested by a microhardness tester. Then
their residual stress was measured by the small hole method. Finally
their electrochemical properties (polarization curves
impedance spectra) were tested using a three-electrode system (3.5% NaCl solution).
Results
2
The results showed that ultrasonic impact caused plastic deformation and grain refinement on the surface of the samples;at 8 minutes
the average surface hardness reached 262.9 HV (14.3% higher than the initial value)
the residual tensile stress was converted to compressive stress and increased with treatment time
and the maximum residual compressive stresses in the
x
and
y
axes at 8 minutes were -204.2 MPa and -121.5 MPa
respectively;at 8 minutes
the corrosion current density was reduced to 12% of that of the untreated sample
showing the best corrosion resistance. The synergistic effect of grain refinement
plastic deformation and residual compressive stress was the key mechanism for performance improvement.
关键词
Keywords
references
CHAOUCH D , GUESSASMA S , SADOK A . Finite element simulation coupled to optimisation stochastic process to assess the effect of heat treatment on the mechanical properties of 42CrMo4 steel [J]. Materials & Design , 2012 , 34 : 679 - 684 .
JIANG B , ZHOU L Y , WEN X L , et al . Heat treatment properties of 42CrMo steel for bearing ring of varisized shield tunneling machine [J]. Acta Metallurgica Sinica (English Letters) , 2014 , 27 ( 3 ): 383 - 388 .
LIVERIC L , IIJKIĆ D , JURKOVIĆ Z , et al . Corrosion behaviour of annealed 42CrMo4 steel [J]. Materials and Technologies , 2023 , 57 ( 2 ): 111 - 117 .
HANZA S S , ŠTIC L , LIVERIĆ L , et al . Corrosion behaviour of tempered 42CrMo4 steel [J]. Materials and Technology , 2021 , 55 ( 3 ): 427 - 433 .
LUO Jiayuan , LI Xin , TAN Chao . Effect of welding residual stress on crack propagation and fatigue performance of high strength steel spot welding joint [J]. Journal of Mechanical Strength , 2024 , 46 ( 2 ): 439 - 445 . (In Chinese)
BURDZIK R , STANIK Z , WARCZEK J . Method of assessing the impact of material properties on the propagation of vibrations excited with a single force impulse [J]. Archives of Metallurgy and Materials , 2012 , 57 ( 2 ): 409 - 416 .
TARASIUK W , GORDIENKO A , WOLOCKO A , et al . The tribological properties of laser hardened steel 42CrMo4 [J]. Archives of Metallurgy and Materials , 2015 , 60 ( 4 ): 2939 - 2944 .
LIU Jie , LI Jiandong , LÜ Lei , et al . Evaluation on application of corrosion protection downhole tool in oil-wells [J]. Surface Technology , 2016 , 45 ( 8 ): 92 - 97 . (In Chinese)
ZHI Z , ZHOU X , ZENG D Z , et al . Evaluation on chloride cracking of S135 high-strength drill pipe [J]. Advanced Materials Research , 2012 ,430/ 431 / 432 : 636 - 639 .
CUI X Y , WANG C B , KANG J J , et al . Influence of the corrosion of saturated saltwater drilling fluid on the tribological behavior of HVOF WC-10Co 4 Cr coatings [J]. Engineering Failure Analysis , 2017 , 71 : 195 - 203 .
LI L , KIM M , LEE S , et al . Influence of multiple ultrasonic impact treatments on surface roughness and wear performance of SUS301 steel [J]. Surface and Coatings Technology , 2016 , 307 : 517 - 524 .
WANG Yongxiang , HE Bolin , LI Li . Improvement of corrosion fatigue performance of P355NL1 steel welded joint by ultrasonic impact [J]. Journal of Chinese Society for Corrosion and Protection , 2022 , 42 ( 1 ): 120 - 126 . (In Chinese)
National Technical Committee on Steel Standardization . Metallic material-Determination of residual stress-Hole drilling strain-gauge method : GB/T 31310—2014 [S]. Beijing : Standards Press of China , 2014 : 26 . (In Chinese)
LUO X , REN X , JIN Q , et al . Microstructural evolution and surface integrity of ultrasonic surface rolling in Ti 6 Al 4 V alloy [J]. Journal of Materials Research and Technology , 2021 , 13 : 1586 - 1598 .
HE Bolin , XIE Xuetao , DING Jianghao , et al . Mechanism of improving ultra-high cycle fatigue properties of MB8 magnesium alloy welded joint by ultrasonic impact treatment [J]. Rare Metal Materials and Engineering , 2019 , 48 ( 2 ): 650 - 655 . (In Chinese)
FARHAT Z N , DING Y , NORTHWOOD D O , et al . Effect of grain size on friction and wear of nanocrystalline aluminum [J]. Materials Science and Engineering:A , 1996 , 206 ( 2 ): 302 - 313 .
ZHOU Nanyang , HE Liang , CHENG Bing , et al . Research progress in improving mechanical properties of welded joints by ultrasonic impact treatment [J]. Development and Application of Materials , 2023 , 38 ( 5 ): 94 - 98 . (In Chinese)
XU Q Z , LIU Y , LU H Y , et al . Surface integrity and corrosion resistance of 42CrMo4 high-strength steel strengthened by hard turning [J]. Materials , 2021 , 14 ( 22 ): 6995 .
SU H , SHEN X H , XU C H , et al . Surface characteristics and corrosion behavior of TC11 titanium alloy strengthened by ultrasonic roller burnishing at room and medium temperature [J]. Journal of Materials Research and Technology , 2020 , 9 ( 4 ): 8172 - 8185 .
WANG Liangtian , HU Wenyu , HUANG Guobin , et al . Effects of Cl - on pitting corrosion of 304 stainless steel pipes in the presence of different residual stresses [J]. Journal of Xi'an Jiaotong University , 2022 , 56 ( 11 ): 104 - 114 . (In Chinese)