通过实验,本文作者确立了稀土—碱土金属复合变质对改变低铬白口铸铁中碳化物形态的有效性。在此基础上,进一步研究了这种复合变质处理对改善低铬白口铸铁的韧性、抗磨粒磨损能力的作用。实验证实:这种作用是显著的。本文还提出了由碳化物数量、分布、磨损面硬度等因素构成的抗磨参数与相对耐磨性的线性关系。 Through experiments, the author of the paper established that the rare earth - alkaline earth compound metamorphism to change the low chromium white cast iron carbide morphology validity. On this basis, further study of the compound metamorphic treatment to improve the toughness of low chromium white cast iron, abrasive wear resistance. Experiments show that: this effect is significant. The paper also proposed a linear relationship between anti-wear parameters and relative wear resistance which is composed of carbide quantity, distribution, wear surface hardness and other factors.