论文部分内容阅读
发热剂是一种粉末状的混合物,其中含有铝粉及氧化剂,当它同液态金属接触时即进行燃烧并发出大量的热能。如果在这种发热剂内加入一些能够控制燃烧速度的物质、一些耐火材料的填料和粘结剂,加水混匀后压制成型,烘干后便可用于金属浇铸方面,一般称做发热浇口冒口。它与一般浇口冒口不同的地方是:当它同浇铸的金属接触后能燃烧发热,然后成为一种坚实能耐高温的绝热材料,好似保存液态金属的容器;并使液态金属的温度在一个较长的时间内不变,甚至有时还可以要求它把液态金属的温
The heat-generating agent is a powdered mixture containing aluminum powder and oxidizing agent that burns and emits a large amount of heat when it comes into contact with the liquid metal. If you add some in the heating agent to control the burning rate of the material, some refractories filler and binder, add water after mixing press molding, drying can be used for metal casting, the general is called the sprue mouth. Unlike conventional gate risers, when it comes into contact with the cast metal, it burns and heats up and becomes a solid, heat-resistant, thermally insulating material, much like a container that holds liquid metal; it keeps the temperature of the liquid metal at one For a longer period of time, it may even be required to warm the liquid metal sometimes