光学精密工程2013，Vol.21Issue(8)：1995-1999,5.DOI:10.3788/OPE.20132108.1995
弛豫过程中的纳米析出及贝氏体组织的细化
Nano-size precipitation during relaxation and refinement of bainite
摘要
Abstract
The evolution of dislocations in an austenitic region has a close relationship with the processing of precipitation during the alloy steel deformation.To verify the relevance of the refining structure of bainite and the pining dislocation networks of nano-size precipitation for Fe-40Ni alloy,the thermo-simulation test,metallographic analysis,quantitative measurement and Transmission Electron Microscope (TEM) technique were used to study the precipitation of deformated low carbon microalloyed steel in a relaxation processing at 850 ℃ and its influence on bainite formed during subsequent cooling.The experimental results demonstrate that the microstructures (mixed ultra-fine bainite and martensite) of the tested steel have been refined effectively during relaxation processing and it shows that the optimum refinement can be obtained by 60-200 s relaxation after being deformed.Meanwhile,the dislocations can be pinned by the strain-induced precipitation whose sizes are less than 10 nm.The experimental results obtained from the tested steel are in a good agreement with that of the Fe-40Ni alloy simulations.关键词
Fe-40Ni合金/纳米级析出相/弛豫过程/组织细化/贝氏体Key words
Fe-40Ni alloy/nano-size precipitation/relaxation/structure refinement/bainite分类
矿业与冶金引用本文复制引用
苑少强,张晓娟,郝斌,张济山..弛豫过程中的纳米析出及贝氏体组织的细化[J].光学精密工程,2013,21(8):1995-1999,5.基金项目
新金属材料国家重点实验室开放基金资助项目(No.2012Z-05) （No.2012Z-05）
河北省杰出青年基金资助项目(No.E2012105005) （No.E2012105005）
