由于最佳的韧性都是来自铁素基体，所以所有美国尼伯科球墨铸铁都经过铁素体退火韧化过程处理。 收藏。
Optimum ductility is obtained with a ferritic matrix, so all NIBCO ductile iron is treated with a ferritizing annealing cycle.
由于最佳的韧性都是来自铁素基体，所以所有美国尼伯科球墨铸铁都经过铁素体退火韧化过程处理。 收藏。
Optimum ductility is obtained with a ferritic matrix, so all NIBCO ductile iron is treated with a ferritizing annealing cycle.
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