根据化学键理论，推导出新的键参数函数图，为合金化元素的选择提供了依据。本文依据键参数函 数目，选择了以 Ｖ、Ｔｉ、Ｃｕ使合金化元素，并配合适量的 Ｍｏ。结果表明，高铬白口铸铁铸态下的韧性、耐磨性 能大大改善。由此说明可用该函数图选择高铬白口铸铁的合金化元素。 According to the chemical bond theory, a new bond parameter function graph is deduced, which provides a basis for the selection of alloying elements. According to the key parameter function, we choose alloying elements with V, Ti, Cu, and with the appropriate amount of Mo. The results show that the toughness and wear resistance of high-chrome white cast iron are improved greatly. This shows that the function diagram can be used to select alloying elements of high chromium white cast iron.