摘要
本文借助扫描电镜及透射电镜,观察了经冷拔形变的低碳Si-Mn双相钢回复及再结晶过程中显微组织结构的变化,研究了硅对试验用钢回复及再结晶过程的影响。结果表明:(1)试验用钢在碳、锰含量及马氏体体积百分数相近的条件下,在给定温度加热时,回复及再结晶过程首先在原双相组织中的铁素体区内发生,最后在原马氏体区内结束;原铁素体区再结晶后的α晶粒,大于原马氏体区再结晶后的α晶粒;(2)在其它条件给定时,经76％面缩率拉拔后的钢与23％面缩率拉拔后的钢相比,前者的回复及再结晶过程加快;(3)在同样条件下,随钢中硅含量的增多,回复及再结晶过程被推迟;硅含量高的钢,再结晶后α的平均晶粒尺寸较小。
This article examined the recovery and recrystallization of cold-drawn Si-Mn dual-phase steels by means of SEM and TEM. And the influence of silicon on the processes of recovery and recrystallization was researched. Experimental results show: (1) Bine heated at a definite temperature, The recovery and recrystallization of dual-phase steels with approximately equal carbon and manganese contents and volume percentage of martensite appear firstly in the original ferrite phase and end in the original martensite phase. The recrystallized α-grain size in the original ferrite field is larger than That in the martensite field. (2) As the deformation of steels increases from 23％ to 76％ the processes of recovery and recrystallization are accelerated. (3) With increasing silicon content in steels, the processes of recovery and recrystallization are delayed obviously and the recrystallized average α-grain size is decreased also.
出处
《物理测试》
CAS
1993年第2期54-59,共6页
Physics Examination and Testing
关键词
双相钢
回复
再结晶
硅锰钢
dual-phase steel,recovery and recrystallization,silicon
