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Prior to the use of heat-resistant cast steel castings required, it must first master the clear performance on this type of material, particularly the performance of thermal processing. Heat-resistant steel alloys are divided into a good variety of different microstructure, high temperature characteristics vary. How to grasp the hot workability of the alloy heat-resistant steel castings production processes become the focus.

In heat-resistant steel alloy Fe-Cr alloy most commonly used, because it has a ferrite structure at high temperatures, while ferritic alloy roughened after the thermal processing of plastic dropped significantly. For this reason, when the development of Fe-Cr alloy heating process is required to shorten the residence time in the high temperature zone, especially in the more than 1000 ℃ residence time should be shorter.
Since ferritic alloys in the presence of carbides, nitrides, and other high-temperature cooling precipitates from the process of precipitation, cold will reduce the ductility of the alloy. To this end, after the high temperature alloy billet and hot-rolling line shall be subject to rapid cooling, in order to reduce the amount of precipitation and precipitation phase compound, improve product cold plastic.
There is its thermal conductivity and coefficient of linear expansion, not only need to use a faster heating rate and temperature into the furnace heating can not be too high, so as to avoid excessive temperature stress can lead to the formation of alloy cracks.