Hot ingots are often heated in forging furnaces, the feature of which is one-stage type in a constanttemperaturefurnace and two-or three stage type in a temperature-variable furnace.
锻造钢锭多采用热锭加热，其特点是在恒温炉中一段加热和在变温炉中两段或三段加热方式。
2
Dynamic matrix control system of outlet temperature in constant pressure heating furnace is designed with 2-layer structure.