摘要:
The present invention provides a composite pressure-sintered material comprising a continuous phase of hexagonal boron nitride and, dispersed therein, a second material comprising (a) at least one metal nitride selected from the group consisting of silicon, aluminium and titanium nitrides and (b) at least one stable metal oxide; wherein the amount of metal oxide is such that the second material does not contain more than 35% by weight of oxygen. It has been observed that this material possesses a low thermal expansion coefficient and therefore reveals good thermal shock resistance. Another characteristic of this material is its low wettability by molten steel which is thus responsible for excellent chemical resistance to liquid metal. Finally, this material is exceptionally mechanical wear resistant.
摘要:
The present invention provides novel methods and apparatus for continuously casting molten metal in a block caster. In accordance with the present invention, novel track (705) and drive systems (505, 510) are provided for reducing imperfections that can be created in a cast by movement of a beam chain (390) through a casting cycle.
摘要:
Dans un moule sous forme de bande continue pour une machine a couler, pour la coulée en continu de métal avec une plaque (5) sur la surface de travail (6) de l'élément de moule, cette plaque est biseautée en au moins un de ses bords longitudinaux (7) tournés vers la surface de travail. Par ce moyen, au moment de l'utilisation de la machine à couler, les éléments de moule sont protégés contre les déformations occasionnées par les changements de température.
摘要:
The inventive casting machine and the caterpillar casting method based thereon are characterised in that the blocks (4) forming the casting mould surround one of the casting caterpillars (2;3) in a caterpillar-like manner and are separated in a lateral direction into elements which are held together. Said elements are located on the transportation means and are maintained on one part of the periphery of the caterpillar by means of the traction force of stationary magnets on the transportation means.
摘要:
The present invention provides a composite pressure-sintered material comprising a continuous phase of hexagonal boron nitride and, dispersed therein, a second material comprising (a) at least one metal nitride selected from the group consisting of silicon, aluminium and titanium nitrides and (b) at least one stable metal oxide; wherein the amount of metal oxide is such that the second material does not contain more than 35% by weight of oxygen. It has been observed that this material possesses a low thermal expansion coefficient and therefore reveals good thermal shock resistance. Another characteristic of this material is its low wettability by molten steel which is thus responsible for excellent chemical resistance to liquid metal. Finally, this material is exceptionally mechanical wear resistant.