Optimum ductility is obtained with a ferriticmatrix, 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。
2
Therefore, in thin section castings, for eliminating eutectic carbides and obtaining ferriticmatrix, melts treated by re need high carbon content and hypereutectic composition.
在薄壁铸件中获得无游离渗碳体和铁素体基体的稀土球铁的关键是高碳过共晶原铁水。
3
The steels contain more than 0.08 % (mass percent) nitrogen in a ferriticmatrix or more than 0.4 % (mass percent) nitrogen with an austenitic matrix were defined as high nitrogen steels.