Stress relieved grinding rod having hard outer shell
US5972135A · kind A · utility
2Cited by
2References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 3, 1998 |
| Grant date | Oct 26, 1999 |
| Priority date | — |
| Expiry date | Jun 3, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S148/902
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A grinding rod having a hardened outer shell of tempered martensite is adapted for use in heavy duty grinding environments. The rod is stress relieved to reduce internal compressive stresses in the tempered martensitic shell to less than 60 ksi and greater than 15 ksi. Such stress relieve stabilizes the rod against break-up as caused by the balancing tensile stresses in the pearlitic core exceeding tensile strength of the core.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.