2
مکانیک::
انجماد
A high rate of solidification results in smaller inter- metallic particles and reduces the spacing between the particles, and is a feature that can- not be duplicated in casting.
All extraneous non- metallic material, being less dense than steel, is retained at the surface of the bore together with the microporosity formed by the directional solidification.
Progressive solidification occurs when the die is spinning.
Foreign bod- ies and lighter inclusions are directed toward the bore initially by the centrifugal force, and then by progressive solidification of the metal.
Prior to casting, the configuration is wrapped in an insu- lation blanket to reduce loss of heat and to obtain a controlled rate of solidification.
واژگان شبکه مترجمین ایران