【摘要】 试验表明，单纯加铬虽能提高铸件强度和硬度，但有较大白口倾向；稀土能增强铬的合金化功能，抑制其白口倾向较大的不良影响，并已为冲天炉生产试验证实。更多还原

【Abstract】 The results show that the tensile strength and hardness increase by addition of Cr, though Cr promotes undercooling and the formation of free carbide easily. RE can raise the alloying effects of Cr, and eliminates the harmful influnences更多还原