Method of manufacturing a hollow stabilizer
US4533402A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 16, 1984 |
| Grant date | Aug 6, 1985 |
| Priority date | — |
| Expiry date | Feb 16, 2004 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC21D9/02
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A hollow stabilizer manufactured from a material obtained by adding a minute amount (0.001-0.01% by weight) of boron to either a carbon steel tubing having a relatively low carbon concentration of 0.20-0.35% for mechanical and structural purposes or to a carbon steel tubing for general structural purposes. The carbon steel tubing thus provided is bent in a prescribed stabilizer form. The bent tubing is water quenched, for example, to a greater hardness than HRC 43. The water-hardened bent tubing is later tempered to a hardness HRC, ranging between 36 and 43, at a temperature of, for example, 300.degree.-380.degree. C. for a proper length of time. The hollow stabilizer obtained by the aforementioned heat-treating steps has a much greater fatigue strength.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.