| 摘要 |
The invention relates to metallurgy, in particular to a structure of casting heat-resistant steel which can be used for fitting-out of heat-treatment furnaces undergoing a limited number of heat/cooling cycles, for example, crossties, guides, conveyor rollers and other furnace elements. The present invention is aimed at improving stability to cracking and operation stability of heat-resistant steel. The assigned task of the claimed invention is characterized in that the heat-resistant casting steel comprises carbon, silicon, manganese, chromium, titanium and further comprises niobium, boron and rare-earth materials with the following component ratio, wt.%: Carbon – 0.15-0.25, Chromium - 23.0-25.0, Silicon – 0.8-1.2, Manganese – 0.3-0.5, Titanium – 0.1-0.3, Niobium – 0.1-0.3, Boron – 0.005-0.03, rare-earth materials – 0.2-0.3, Iron - remaining. |
