Mn-Nb-Cu-B低碳贝氏体钢的析出动力学  

Precipitation kinetics of Mn-Nb-Cu-B low carbon bainitic steel

作　　者：董洪波[1] 康永林[2] 王克鲁[1] 

机构地区：[1]南昌航空大学航空制造工程学院,江西南昌330063 [2]北京科技大学材料科学与工程学院,北京100083

出　　处：《材料热处理学报》2011年第11期44-47,共4页Transactions of Materials and Heat Treatment

基　　金：国家自然科学基金资助项目(50964012);新金属材料国家重点实验室开放基金资助项目(2010Z-06)

摘　　要：在Gleeble 1500热模拟试验机上,通过应力松弛实验研究了Mn-Nb-Cu-B低碳贝氏体钢在不同工艺条件下析出行为,得到了不同变形量、不同变形速率下的析出动力学曲线。同时,根据实验结果,确定了所研究钢种的析出动力学方程的参数,并计算了析出开始时间。结果表明,在较高温度下,计算值与实验观测值吻合得较好。研究结果对制订合理变形工艺有帮助。Precipitation behavior of austenite in Mn-Nb-Cu-B low carbon bainitic steel under different conditions was investigated on a Gleeble 1500 thermo-mechanical simulator by stress relaxation method.The precipitation kinetics curves were measured at different strain and strain rates.At the same time,the parameter of the precipitation kinetics equation was determined based on experimental results and the starting time of precipitation was calculated,respectively.Results indicate that calculation data by model agree with experimental data at the higher holding temperature.The research is helpful for optimization of hot deformation process.

关 键 词：低碳贝氏体钢 析出动力学 应力松弛 

分 类 号：TG142.1[一般工业技术—材料科学与工程]