在实验室生产和试验了五种珠光体基体的灰铸铁。这些铸铁包括有:含3.4%C、1.7%Si和0.6%Mn的一般灰铸铁,以及在此基础上分别加入Cr+Mo,Mo+Sn,Cr+Ni+Cu和Cr+Ni+Cu+Mo合金的合金铸铁。作了室温和540℃拉伸试验,540℃的蠕变——破断试验,抗热疲劳和膨胀系数试验。一般情况下,所有试验的合金组成都明显地有助于维持高温强度,而在这些组成中,含有Mo的铸铁产生最大的强化效果。实验室试验指出:抗热疲劳性能与高温抗拉强度密切相关。 Five pearlitic matrix cast irons were produced and tested in the laboratory. These cast irons include general gray cast iron containing 3.4% C, 1.7% Si and 0.6% Mn, and adding Cr + Mo, Mo + Sn, Cr + Ni + Cu and Cr + Ni + Cu + Mo Alloy cast iron. Tensile tests at room temperature and 540 ℃, creep-rupture test at 540 ℃, thermal fatigue resistance and coefficient of expansion were made. In general, all experimental alloy compositions significantly contribute to the maintenance of high temperature strength, and in these compositions the cast iron containing Mo gives the greatest reinforcement. Laboratory tests show that: thermal fatigue resistance and high temperature tensile strength are closely related.