Higher nitrogen potential may promote formation of white layer, increase hardness and wear resistance but at the same time increase brittleness of nitriding case.
提高氮势可促使白层形成，提高渗层硬度和耐磨性，但使其脆性增高。
The analysis and study laid emphasis on the microstructure characteristic of hypoeutectic white cast iron in order to resolve the difficult problems of low useful life and high brittleness.
重点分析研究其微观组织特征，目的是解决亚共晶白口铸铁使用寿命短和脆性大的难题。
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