超细晶粒钢的显微组织

1.攀枝花钢铁研究院,四川,攀枝花,617000

2.钢铁研究总院,北京,100081

3.攀枝花钢铁研究院,四川,攀枝花,617000

4.攀枝花钢铁研究院,四川,攀枝花,617000

5.钢铁研究总院,北京,100081

6.攀枝花钢铁研究院,四川,攀枝花,617000

7.钢铁研究总院,北京,100081

基金项目: 国家重点基础研究发展计划(973计划)(G1998061502)

MICROSTRUCTURE OF ULTRA-FINE GRAIN STEEL

分析了以普碳钢成分生产的超细晶粒钢的显微组织.结果表明:工业生产的超细晶粒钢的显微组织由铁素体和珠光体组成,铁素体的晶粒尺寸为4～5 μm,组织中珠光体所占体积分数较低.珠光体中渗碳体以短棒状或颗粒状存在,细小的铁素体晶粒使晶粒内的位错塞积密度减少,有利于提高钢的强度和韧性.

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