摘要
利用SEM-EDS、TEM和Image-Pro Plus等分析手段研究了M390钢在不同奥氏体化过程中的碳化物演变规律。结果表明,在1075~1150℃加热,保温15~120 min奥氏体化条件下,M390钢中碳化物体积分数和平均尺寸随淬火温度升高整体呈现下降趋势。同一淬火温度下,随保温时间延长,碳化物数量整体减少,碳化物平均尺寸先减小后增大,小尺寸碳化物数量先增加后减少,硬度先上升后下降。高温油淬后M390钢中未溶碳化物类型主要是M_(7)C_(3)和M_(8)C_(7)。在奥氏体化过程中,M390钢中碳化物变化主要是M_(7)C_(3)的溶解、长大及再溶解。
Evolution of carbides in the M390 steel during different austenitizing processes was studied using analysis methods such as SEM-EDS,TEM,and Image-Pro Plus.The results show that under the austenitizing conditions of heating at 1075-1150℃and holding for 15-120 min,the volume fraction and average size of carbides in the M390 steel show a decreasing trend as the quenching temperature increases.At the same quenching temperature,with the prolongation of holding time,the amount of carbides decreases as a whole,the average size of carbides decreases first and then increases,while the amount of small carbides and hardness increase first and then decrease.The types of undissolved carbides in high temperature oil quenched steel are mainly M_(7)C_(3)and M_(8)C_(7).During austenitizing,the change of carbides in the M390 steel is mainly the dissolution,growth and dissolution of M_(7)C_(3).
作者
邓锦强
张覃轶
陈俊
伍冬
刘伟
周鸿锋
Deng Jinqiang;Zhang Qinyi;Chen Jun;Wu Dong;Liu Wei;Zhou Hongfeng(School of Materials Science and Engineering,Wuhan University of Technology,Wuhan Hubei 430070,China;Yangjiang Tuobituo Industrial Technology Research Institute Co.,Ltd.,Yangjiang Guangdong 529500,China)
出处
《金属热处理》
CAS
CSCD
北大核心
2023年第11期1-7,共7页
Heat Treatment of Metals
基金
广东省科技创新专项基金(SDZX2021001)。
