Chapter 18
The Effect of Surface Ultrasonic Rolling
Processing on the Rolling Contact
Fatigue Performance of Valve Train
Tappet Material
Zhijian Wang, Mengyang Ma, Chenyang Jiang, Lei Wang,
and Yupeng Wang
Abstract To improve the rolling contact fatigue performance (RCFP) of a kind of
tappet material GCr15 in valve train system of engine, surface ultrasonic rolling
processing (SURP) with different static rolling loads (600, 800, 1000, and 1200 N)
was introduced to reinforce its surface. A variety of experimental instruments were
applied to study various properties including surface morphology, surface roughness,
micro-hardness, surface residual stress and rolling contact fatigue of the samples.
Results point out that compared with the untreated samples, the properties of the
samples treated by SURP were significantly improved. With the static rolling load
of 1000 N, the samples obtain the best surface quality and fatigue life. On the other
hand, the samples with 1200 N gain the highest microhardness (842.3 HV0.3, which
is 12.8% higher than the untreated samples) and residual compressive stress. With
the static rolling load increase, the RCFP of the tappet material shows a trend of first
rising and then falling, and obtain the best RCFP with the static load of 1000 N.
Keywords Tappet material · Surface ultrasonic rolling processing · Surface
property · Rolling contact fatigue
18.1 Introduction
As the modern automobile industry develops significantly towards high speed and
load, the working performance of the core components, engine, is also improved.
At the same time, running speed of the valve train and pressure between the contact
Z. Wang · L. Wang · Y. Wang
State Key Laboratory of Engine Reliability, Weifang, Shandong 261061, China
Weichai Power Co. Ltd, Weifang, Shandong 261061, China
M. Ma (B) · C. Jiang
School of Mechanical and Automotive Engineering, South China University of Technology,
Guangzhou, Guangdong 510640, China
e-mail: mmy222210@163.com
© The Author(s), under exclusive license to Springer Nature Switzerland AG 2021
J. Xu and K. M. Pandey (eds.), Mechanical Engineering and Materials,
Mechanisms and Machine Science 100,
https://doi.org/10.1007/978-3-030-68303-0_18
221
The Effect of Surface Ultrasonic Rolling
Processing on the Rolling Contact
Fatigue Performance of Valve Train
Tappet Material
Zhijian Wang, Mengyang Ma, Chenyang Jiang, Lei Wang,
and Yupeng Wang
Abstract To improve the rolling contact fatigue performance (RCFP) of a kind of
tappet material GCr15 in valve train system of engine, surface ultrasonic rolling
processing (SURP) with different static rolling loads (600, 800, 1000, and 1200 N)
was introduced to reinforce its surface. A variety of experimental instruments were
applied to study various properties including surface morphology, surface roughness,
micro-hardness, surface residual stress and rolling contact fatigue of the samples.
Results point out that compared with the untreated samples, the properties of the
samples treated by SURP were significantly improved. With the static rolling load
of 1000 N, the samples obtain the best surface quality and fatigue life. On the other
hand, the samples with 1200 N gain the highest microhardness (842.3 HV0.3, which
is 12.8% higher than the untreated samples) and residual compressive stress. With
the static rolling load increase, the RCFP of the tappet material shows a trend of first
rising and then falling, and obtain the best RCFP with the static load of 1000 N.
Keywords Tappet material · Surface ultrasonic rolling processing · Surface
property · Rolling contact fatigue
18.1 Introduction
As the modern automobile industry develops significantly towards high speed and
load, the working performance of the core components, engine, is also improved.
At the same time, running speed of the valve train and pressure between the contact
Z. Wang · L. Wang · Y. Wang
State Key Laboratory of Engine Reliability, Weifang, Shandong 261061, China
Weichai Power Co. Ltd, Weifang, Shandong 261061, China
M. Ma (B) · C. Jiang
School of Mechanical and Automotive Engineering, South China University of Technology,
Guangzhou, Guangdong 510640, China
e-mail: mmy222210@163.com
© The Author(s), under exclusive license to Springer Nature Switzerland AG 2021
J. Xu and K. M. Pandey (eds.), Mechanical Engineering and Materials,
Mechanisms and Machine Science 100,
https://doi.org/10.1007/978-3-030-68303-0_18
221