摘要
本文对20Cr钢不同原始组织在不同临界高温区淬火形成双相组织中的铁素体数量、晶粒长度、平均自由程、形状因子等显微组织参数进行了人工定量测定。结果表明:铁素体量主要由淬火温度决定;而原始组织显著影响铁素体的形状;淬火预处理可有效地细化铁素体晶粒。
In this paper,the microstructural parameters of ferrite,including volume,grain length,shape factor and mean free distance,are measured manually for dual phase microstructure formed under different original microstructures and different quenching temperatures of upper subcritical zone. The results show that the volume of ferrite is mainly determined by quenching temperature, that the original microstructures change the shape factor dominantely,and that quenching pretreatment is effective to refine the ferrite.
关键词
双相组织
铁素体参数
临界淬火
Dual phase microstructure
Ferrite parameters
Subcritcal quenching
Quantitative metallography
