Method of fabricating metal parts of different ductilities
Hardened metal articles such as slabs, plates or sheets or preformed metal articles which are to have regions of different ductility are subjected to heating to an austenization temperature and then to quenching of the region of greater ductility to form a start temperature lying above the gamma-alp...
Saved in:
| Main Authors | , |
|---|---|
| Format | Patent |
| Language | English |
| Published |
01.04.2004
|
| Online Access | Get full text |
Cover
Loading…
| Summary: | Hardened metal articles such as slabs, plates or sheets or preformed metal articles which are to have regions of different ductility are subjected to heating to an austenization temperature and then to quenching of the region of greater ductility to form a start temperature lying above the gamma-alpha transformation temperature of the workpiece structure. The quenching is terminated at a stop temperature lying above the martensitic temperature and prior to any substantial transformation into ferritic or perlitic structures. The higher ductility region is then maintained prior to any substantial transformation into ferritic or perlitic structures. The higher ductility region is then maintained isothermically for condition of austenitite ferrite and/or perlite. The lower ductility structure is brought to a temperature sufficient for martensitic formation and the hardening is then carried out. |
|---|