粉末锻钢12Cr2Ni4A和18Cr2Ni4WA的冲击韧性研究

Research on Shock Toughness of Powder Forging Steel 12Cr2Ni4A and 18Cr2Ni4WA

分析讨论了影响粉末锻钢冲击韧性的因素和近年来为改进粉末锻钢冲击韧性在国内外的进展。为进一步提高粉末锻钢的冲击韧性，进行了降低粉末锻钢的氧含量和热处理试验。发现长时间扩散退火可显著提高粉末锻件的冲击韧性。

The factors that have effect on shock toughness of powder forging steel and progress for improving shock toughness of powder forging steel at home and abroad in recent years are analysed and discussed. We carried out experiment decreasing oxygen content of powder forging steel and heat treatment to increas shock toughness of powder forging steel.It is found that shock toughness of powder forging part can be increased obviously by diffusion annealing for long time.