摘要
研究了曲轴用非调质钢C38N2在不同加热温度和加热时间下的奥氏体晶粒长大行为及高温下的热塑性，并建立了奥氏体晶粒长大的数学模型。结果表明，加热时间30min时，奥氏体晶粒粗化温度和铌迅速大量固溶的开始温度为1050℃；在900～1050℃和1050～1250℃两个温度区间内，奥氏体晶粒长大方程分别为D=1．01×10^3·t^0.21·exp（-5．33×10^4／（RT））和D=8．77×10^6·t^0.21·exp（-1．59×10^5／（RT））；高热塑性温度范围为800～1200℃，1100℃时热塑性最好。
The austenite grain growth behavior under different heating temperatures and holding time and the hot ductility of non-quenched and tempered steel C38N2 for crankshaft were investigated. The results show that the austenite grain coarsening temperature and the start temperature when niobium heavy and rapidly solution is 1050 ℃. Growth models of austenite grain in the temperature ranges of 900-1050 ℃ and 1050-1250℃ are described as D = 1.01 ×10^3 · t^0.21 · exp （ - 5.33 ×10^4/（RT） ） and D = 8.77 × 10^6 · t^0.21 · exp （ - 1.59 × 10^5/ （RT） ） , respectively. The steel has good hot ductility in the temperature range 800-1200 ℃ , and has the best hot ductility when the heating temperature is 1100 ℃.
出处
《金属热处理》
CAS
CSCD
北大核心
2014年第2期30-33,共4页
Heat Treatment of Metals
关键词
非调质钢
奥氏体
晶粒长大
热塑性
non-quenched and tempered steel
austenite
grain growth
hot ductility
