铝对微合金钢奥氏体分解动力学的影响  

Effect of Al on Austenite Decomposition Kinetics in Microalloyed Steel

作　　者：王元立[1] 柳得橹[1] 霍向东[1] 康永林[1] 傅杰[2] 孙贤文[1] 

机构地区：[1]北京科技大学材料科学与工程学院,北京100083 [2]北京科技大学冶金学院,北京100083

出　　处：《北京科技大学学报》2004年第3期264-267,共4页Journal of University of Science and Technology Beijing

基　　金：国家重点基础发展规划研究项目(No.G1998061500)

摘　　要：通过实验室热模拟和轧制实验研究了添加0.21％Al对成分为0.05％C-1.7％Mn-0.4％Si-0.05％Nb-0.03％Ti(质量分数)的微合金钢奥氏体分解动力学的影响.结果表明:加入0.21％Al在冷速为10℃/s范围内明显抑制奥氏体向先共析铁素体的转变,提高了贝氏体的淬透性;对于780℃终轧后在600℃等温20min的钢板,Al通过提高碳的活度减轻或避免了带状组织的形成,明显提高了轧制钢板的力学性能.The influence of 0.21% Al (mass fraction) on the kinetics of austenite decomposition in microalloyed steel containing 0.05%C-1.7%Mn-0.4%Si-0.05%Nb-0.03%Ti was studied. The results show that the hardenability of the experimental steel increases apparently by adding 0.21% Al when the cooling rate is in the range of l-30°C/s. For isothermal treated plates at 600°C for 20 min after rolling process, the banding microstructure of the plates containing 0.21% Al is abated or avoided and the overall mechanical properties of the plates is promoted greatly.

关 键 词：微合金钢 热模拟 带状组织 力学性能 

分 类 号：TG142.1[一般工业技术—材料科学与工程]