Performance Analysis of Surface Modification Layer of 18CrNiMo7-6 GearSteel Treated by Ultrasonic Rolling
[1]Liu Zhihua,Zhang Tianzeng,Yang Mengjian,et al.Performance Analysis of Surface Modification Layer of 18CrNiMo7-6 GearSteel Treated by Ultrasonic Rolling[J].Journal of Zhengzhou University (Engineering Science),2020,41(02):44-49.[doi:10.13705/j.issn.1671-6833.2020.03.016]
Copy
Journal of Zhengzhou University (Engineering Science)[ISSN
1671-6833/CN
41-1339/T] Volume:
41
Number of periods:
2020 02
Page number:
44-49
Column:
Public date:
2020-05-31
- Title:
- Performance Analysis of Surface Modification Layer of 18CrNiMo7-6 GearSteel Treated by Ultrasonic Rolling
- CLC:
- -
- DOI:
- 10.13705/j.issn.1671-6833.2020.03.016
- Abstract:
- The performance and processing technology of surface modification layer of 18CrNiMo7-6 gear steelafter ultrasonic rolling were studied. The measurement instructions, such as 3D surface topography measure-ment system , microhardness instrument , super depth of field 3D microscopy system and high power X-ray dif-fractometer were used respectively, to observe the variation of surface modification layer of the sample. Theeffects of ultrasonic rolling process parameters on surface modification layer were studied by single factor test.The results showed that after ultrasonic rolling, the surface roughness of the specimen is decreased from theuntreated 3. 003um to 0. 468um. Significant work hardening formed on the surface of the material after ultra-sonic rolling. Surface microhardness increased by 22. T% from 360. 9 HV to442. 9 HV , and the high hardness layer reached 300 um. Flat surface appeared after ultrasonic rolling. The maximum residual compressive stressoccured at a distance of 40 um from the surface, which was about -790. 97 MPa. Ultrasonic rolling technology significantly improveed the properties of the modification layer.
- References:
- -
- Similar References:
Memo
-
Last Update:
2020-05-30