随着新技术的不断发展,有许多耐热件都采用了中硅耐热铸铁。但是,这种铸铁的缺点是常温下的机械性能较低,抗弯强度仅能达到18～21公斤力/毫米~2,给搬运和装配造成了困难。为了克服上述缺点,必须在保证化学成分(特别是含硅量)的基础上,来提高其机械性能。我们采用在炉料中加“低硅铁”的方法,提高了铸件的强度。一、炉料配比(公斤) With the continuous development of new technologies, there are many heat-resistant parts are made of heat-resistant silicon cast iron. However, the disadvantage of this type of cast iron is its low mechanical properties at room temperature and its flexural strength of only 18-21 kgf / mm2, making handling and assembly difficult. In order to overcome the above shortcomings, the mechanical properties must be improved on the basis of ensuring the chemical composition (especially the silicon content). We use the charge in the “low ferrosilicon” approach to improve the strength of the casting. First, the charge ratio (kg)