用小能量多冲击法测量烧结钢的断裂韧性

Measurement of Sintered Steel's Fracture Toughness by Repeated Impact with Low Energy

摘要: 采用小能量多次冲击法测量了尺寸为12mm×12.5mm×62.5mm烧结碳钢的断裂韧性K_IC值。考察了碳含量、冷却速度及后续退火工艺对粉末烧结钢的断裂韧性K_IC值的影响。结果表明,烧结钢在小能多次冲击状态下的断裂韧性K_IC值主要由烧结钢的强度决定。同时也需要一定的塑性与之相配合。

Abstract: The repeated impact method with low energy,was adopted for measuring the fracture toughness of sintered carbon steels with sample size of 12mm×12.5mm×62.5mm.The effect of carbon content,cooling rate and anealing process on the sintered steels' fracture toughness was studied.The results shows that the fracture toughness,K_IC value of sintered carbon steels,is dominated by their strength,and their ductility is necessary for improving the fracture toughness of thesintered steels.