对H 13钢穿孔顶头进行了稀土铝合金化研究。
研究结果表明，稀土铝合金化可提高材料的硬度、强度及氧化膜的致密度。
The results show that RE-Al alloying can improve the hardness, the strength and the oxide film density of the piercing plug.
经分析表明，稀土铝合金化可以明显改善H13钢顶头的铸造性能，消除了中心缩孔现象，并细化了晶粒和碳化物，降低了S、P含量。
The results of the research show that Re-Al alloying improves the casting property of H13 steel, eliminates central pipe, refines grains and carbides, reduces the amount of S and P.
结果表明：稀土对铝合金泡沫化无异常影响；
There was no exceptional effect of rare earth on the foaming process.
结果表明：稀土对铝合金泡沫化无异常影响；
There was no exceptional effect of rare earth on the foaming process.
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