Compared with non inoculated cast H13 steel,inoculated cast H13 steel after quenching and tempering has no carbide in grain boundaries and its impact toughness is improved greatly.

• 与未变质H13钢相比,经过淬火、回火处理后的变质H13钢中无晶界碳化物析出,冲击韧性大幅度提高。