研究了SG变质剂对可锻铸铁石墨化退火的影响。
The influence of SG inoculant on graphitizing annealing of malleable cast iron was investigated.
针对可锻铸铁退火周期长、石墨粗大、碳化物消除不彻底、退火工件力学性能低和使用寿命短的问题，对它的退火工艺进行了改进。
The heat treating process was improved for the malleable cast iron, in accordance with its long annealing period, coarse graphite, residual carbide, lower mechanical properties and limited serve life.
配制了以稀土元素为主的可锻铸铁复合孕育剂，进行了生产实验，研究和分析了稀土复合孕育剂对可锻铸铁石墨化退火周期的影响。
The effect of the rare earth compound inoculant on graphitizing the annealing period of the malleable cast-iron was studied and analyzed.
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