低碳马氏体钢中多尺度板条结构界面的强化效果  

Strengthening effect of multiscale lath structure interface in low carbon martensite steel

作　　者：王鑫 李昭东[2] 周世同[1,2] 邓灿明[1,2] 代建清 Wang Xin1,2, Li Zhaodong2 , Zhou Shitong1,2 , Deng Canming1,2, Dai Jaanqing1,2(1. Faeuhy of Material Science and Engineering, Kunming University of Science and Technology, Kunming Yunnan 650093, China ; 2. Institute of Engineering Steels, Central Iron and Steel Research Institute, Beijing 100081, Chin)

机构地区：[1]昆明理工大学材料科学与工程学院,云南昆明650093 [2]钢铁研究总院工程用钢所,北京100081

出　　处：《金属热处理》2018年第3期50-56,共7页Heat Treatment of Metals

基　　金：国家自然科学基金(51201036);国家重点基础研究发展计划(973计划)(2015CB654803)

摘　　要：理论计算了马氏体变体滑移面{110}的取向差,探讨了低碳马氏体板条束界与板条块界的强化效应,利用纳米压痕、维氏硬度、布氏硬度以及背散射电子衍射（EBSD）等试验手段表征了0.2C-2Mn马氏体钢中原奥氏体晶界、板条束界、板条块界的强化效果。结果表明,0.2C-2Mn马氏体钢的大角度界面均具有显著的强化作用,板条块是低碳马氏体钢强度的晶粒结构控制单元。Strengthening effect of packet boundary and block boundary in low carbon lath martensitic steel were discussed by theoretical calculation of the { 110} misorientation between martensitic variants. Strengthening effects of austenite grain boundary,packet boundary and block boundary in 0. 2 C-2 Mn martensitic steel were characterized by nanoindentation,Vickers hardness,Brinell hardness and backscatter electron diffraction（ EBSD）. The results show that the high angle boundaries in the 0. 2 C-2 Mn lath martensitic steel have significant strengthening effects. And the martensitic block size can be regarded as the microstructural unit controlling the strength.

关 键 词：低碳钢 板条马氏体 强化效果 纳米压痕 板条块 

分 类 号：TG111.5[金属学及工艺—物理冶金]