Method for controlling carbide network in a bearing steel wire rod by controlling cooling and controlling rolling
US12234522B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Nov 8, 2019 |
| Grant date | Feb 25, 2025 |
| Priority date | — |
| Expiry date | Feb 9, 2042 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16C2240/60
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method for controlling carbide network in a bearing steel wire rod by controlling cooling and rolling, comprises the following steps: rapidly rolling a bar to a wire rod and spinning it into a loose coil, controlling the rolling temperature at 780° C.-880° C.; and the spinning temperature at 750° C.-850° C.; carrying out on-line controlling cooling of continuous loose coils using EDC water bath austempering cooling process, controlling the cooling rate at 2.0° C./s-10° C./s, and controlling the final cooling temperature within 620-630° C.; after EDC water bath austempering cooling, using slow cooling under a cover, and the temperature is controlled to be 400° C.-500° C. when being removed out of the cover; after slow cooling, collecting coils, and cooling in air to the room temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.