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作者在广泛调查和试验的基础上,对RTSi-5.5耐热铸铁的脆断问题进行了分析,并就解决该问题提出了相应的技术要求和技术措施。作者指出,把硅量控制在4.5-5.5%并加入0.5-1.0%Cr或稀土元素,对提高中硅耐热铸铁的性能有明显效果;作者建议,这种材质的使用温度应不大于700℃;同时,作者还提出了获得合格铸件的工艺措施。
On the basis of extensive investigation and experiment, the author analyzes the brittle fracture of RTSi-5.5 heat-resistant cast iron and puts forward the corresponding technical requirements and technical measures to solve the problem. The authors note that controlling the amount of silicon at 4.5-5.5% and adding 0.5-1.0% Cr or rare earth elements has a significant effect on improving the performance of heat-resistant, mid-size cast iron; the authors suggest that the temperature of this material should not exceed 700 ° C At the same time, the author also proposed the process of obtaining qualified castings.