Some high alloy heat-resistant steel casting hard machining deformation, casting production not only economical than rolling, and casting and high rupture strength.So in the heat resistant steel heat resistant cast steel occupies a large proportion of the.Besides using sand casting, casting method can also be used for precision casting process to obtain a smooth surface, size precision products.For synthetic ammonia and ethylene cracking in high temperature furnace tube often adopt the method of centrifugal casting.Heat treatment of bead light body heat strong after normalizing or quenched and tempered steel is usually used;In quenched and tempered martensite heat-resistant steel processing, to stabilize the organization, get good comprehensive mechanical properties and high temperature strength.