我厂热处理车间的箱式炉(RJX-30-9)是用作195Z曲轴等温淬火的。使用温度经常在900℃左右,常因炉底板损坏影响生产。为解决这个问题,我们自制了一种用硅-铬-铝耐高温铸铁浇注的炉底板,使用温度在900～920℃,一块底板能使用半年,成本约80元。硅-铬-铝耐高温铸铁的化学成分为:C2.5～3.5％、Si3.8～4.2％、Mn0.6～ I plant heat treatment workshop box furnace (RJX-30-9) is used as a 195Z crankshaft isothermal quenching. Operating temperature is often around 900 ℃, often due to furnace floor damage affect the production. To solve this problem, we made a self-made furnace floor made of silicon-chromium-aluminum high-temperature cast iron, which can be used for half a year at a temperature of 900-920 ℃ at a cost of about 80 yuan. The chemical composition of silicon-chromium-aluminum high temperature cast iron is: C2.5 ~ 3.5%, Si3.8 ~ 4.2%, Mn0.6 ~