| 摘要 |
<p>The method provides for a ''thermocycling'' by multiple heating and cooling carried out within the temperature interval between the martensite transformation starting point and the melting point, that is between 160° and 1305°C, the steel being precooled up to 1000-1100°C during the cooling cycles; hardening by means of cooling down from a temperature exceeding the polymorphic transformation temperature to which the steel is heated during the last cycle of the thermocycling; and tempering.</p> |
