Impact of Hydrogen on Steel Rotor Machining
Author Information
Author(s): Balitskii Alexander I., Syrotyuk Andriy M., Kolesnikov Valerii O., Balitska Valentina O., Ivaskevych Ljubomyr M., Havrilyuk Maria R.
Primary Institution: Karpenko Physico-Mechanical Institute, National Academy of Sciences of Ukraine
Hypothesis
How does absorbed hydrogen affect the machining of steel rotor shafts?
Conclusion
The study found that hydrogen absorption during machining leads to finer chips and increased surface roughness, indicating degradation of the rotor shaft.
Supporting Evidence
- After 250,000 hours of operation, the average grain size of the rotor shaft decreased from 21.57 μm to 12.72 μm.
- The amount of hydrogen absorbed during operation increased from 2.27 ppm to 7.54 ppm.
- Chips produced at higher rotational speeds changed from rectangular to large spiral rings.
- Surface roughness increased with higher hydrogen content in the material.
Takeaway
When steel rotors are machined, hydrogen can make the chips smaller and the surface rougher, which shows that the rotor is getting damaged.
Methodology
The study involved machining rotor shafts made from 38KhN3MFA steel and analyzing the effects of hydrogen absorption on chip formation and surface roughness.
Limitations
The study did not specify the external funding or potential biases in the methodology.
Digital Object Identifier (DOI)
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