晶格氧使碳化钨的比活性略有下降。

Oxygens in the lattice lower the specific catalytic activity of tungsten carbide for these reactions.

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将…烧成碳，使碳化。

To burn to carbon; carbonize.

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结果表明，稀土元素能破碎高铬铸铁中的碳化物，使碳化物由网状、长条状向岛状、块状过渡。

The experimental results show that the carbides in high Cr cast iron can be refined and changed from net and long shapes into island and block ones.

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