试验表明，铸态铁素体球铁硅含量增加时，脆性转变温度也相应提高。
Test shows that the embrittlement temperature will increase with increase of the Si content.
通过在中硅耐热铸铁中添加不同组合的合金元素稀土、铜、钛使其合金化，经过孕育和球化处理，得到铁素体+珠光体+球状石墨的金相组织。
Adding different alloy combination of re, copper and titanium, then through gestation and nodulizing disposal, we got the fine texture of ferrite pearlite and spheroidal graphite.
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