摘要
根据第二相的固溶度积公式,Ostwald熟化规律和第二相阻止晶粒长大的理论,提出了确定加热温度下奥氏体晶粒粗化时间和确定加热时间下奥氏体晶粒粗化温度的理论计算方法,并对0.04C-0.24Nb钢进行了高温金相试验和相应的理论计算,理论计算结果和试验结果良好吻合,这证明该理论计算方法是可行的,同时证实了高温下碳氮化铌质点的Ostwald熟化过程是受铌在钢中的体扩散所控制的。
According to the solid solubility equation and Ostwald ripening law of second-phase and the theory of second-phase inhibiting grain growth, a theoretic calculation method for the austenite grain caorsening time at certain reheating temperature and the austenite grain coarsening temperature at certain reheating time of the grain refining steel has been proposed, and the high-temperature metallographic experiment and the concerned calculation for 0.04C-0.24Nb steel have been carried out. The calculated result is consistent well with the experimental one, which has shown that the calculation method is feasible and that the Ostwald ripening process of niobium carbonitride particles is controlled by the lattice diffusion of niobium in steel.
出处
《钢铁》
CAS
CSCD
北大核心
1993年第9期45-50,共6页
Iron and Steel
基金
国家自然科学基金
