| 摘要 |
FIELD: process engineering.SUBSTANCE: invention relates to metallurgy, particularly, to production of metal strip with mechanical properties varying over strip width. The strip is heated, cooled and overaged at continuous annealing. Note here that at least one of the following parameters varies over the strip width: heating rate, maximum temperature, holding duration at maximum temperature and cooling trajectory after maximum temperature. Note here that at least one of the following parameters varies over the strip width at overaging: rate of heating to maximum temperature, duration of holding at maximum temperature, cooling trajectory after maximum temperature, overaging temperature, duration of holding at overaging temperature, minimum temperature before reaging and rate of heating to reaging temperature. Note here that at least one cooling trajectory follows the nonlinear temperature-time curve.EFFECT: metal strip with mechanical properties varying over strip width.15 cl, 8 tbl, 4 dwg |
