适当提高硅含量可有效地提高蠕铁的力学性能，抗氧化性能和热疲劳性能。中硅耐热蠕铁的高温强度比普通蠕铁提高３０％，与中硅球铁相当，抗氧化性能比普通蠕铁提高５倍以上，接近球铁远优于灰铁。在急冷条件下，热疲劳性能优于球铁和灰铁，随球化率下降，热疲劳性能提高。使用证明，中硅耐热蠕墨铸铁综合性能良好。适用于７００～８５０℃条件下工作的新型耐热材料 Appropriate increase of silicon content can effectively improve the mechanical properties of vermicular iron, oxidation resistance and thermal fatigue properties. The high temperature strength of heat-resistant compacted iron in silicon is 30% higher than that of ordinary vermicular iron, equivalent to that of middling ductile iron, and its oxidation resistance is increased more than 5 times that of ordinary vermiculite, which is much better than gray iron. Under the condition of quenching, the thermal fatigue property is better than that of ductile iron and gray iron, and the thermal fatigue property is improved with the decrease of the nodularity. Use of proof, silicon heat resistant vermicular cast iron good overall performance. For 700 ~ 850 ℃ under the conditions of work of new heat-resistant materials