Properties of Cross-Rolled Low Alloy White Cast Iron Grinding Ball

The low-energy, multi-impact fracture resistance and the abrasiveness of the cross-rolled low alloy white cast iron grinding balls were studied after heat treatments at residual rolling temperature. Moreover, the means by which they are damaged and characters of the wear surface were analyzed. The results show that high resistance to impact fracture and high abrasiveness can be achieved after appropriate heat treatment at residual rolling temperature. This kind of heat treatment technology has several advantages under low impact and hard abrasive. These results are very useful for determining the optimized heat treatment technology at residual rolling temperatures.

Effect of Rare Earth Elements on Dynamics of Thermal Fatigue Crack′s Propagation in Low Alloy White Cast Iron

The effect of rare earth elements on dynamics of thermal fatigue crack′s propagation in low alloy white cast iron was studied. The results show that the generation and growth of the thermal fatigue crack can be restrained and the activation energy for the crack′s propagation can be increased by adding a certain amount of RE, and especially, the restraint for the thermal fatigue crack′s propagation is more evident under the combined action of RE and heat treatment at high working temperatures, which can be attributed to the segregation of RE to interfaces, the participation of granular carbides and the change of eutectic carbide morphology.

优质低铬白口铸铁生产新工艺

优质低铬白口铸铁生产新工艺其核心就是将变质处理、孕育处理、微合金化技术三位一体,互为作用。笔者以优质低铬白口铸铁生产新工艺内容的形式来体现冶金处理技术还应具备哪些相关的动力学条件才能充分发挥其本身工艺效果展开了讨论。