40Cr冷滚打成形中位错密度变化研究

中国机械工程 ›› 2013, Vol. 24 ›› Issue (16): 2248-2252,2256.

40Cr冷滚打成形中位错密度变化研究

王晓强1;崔凤奎1;燕根鹏1;李玉玺2

1.河南科技大学,洛阳,471003
2.西安理工大学,西安,710048

出版日期:2013-08-25 发布日期:2013-08-23
基金资助:
国家自然科学基金资助项目（51075124,50975229)
National Natural Science Foundation of China（No. 51075124, 50975229）

Study on Dislocation Density Change during Cold Roll-beating of 40Cr

Wang Xiaoqiang1;Cui Fengkui1;Yan Genpeng1;Li Yuxi2

1.Henan University of Science & Technology,Luoyang,Henan,471003
2.Xi'an University of Rechnology,Xi'an,710048

Online:2013-08-25 Published:2013-08-23
Supported by:
National Natural Science Foundation of China（No. 51075124, 50975229）

摘要/Abstract

摘要：

为揭示40Cr在高速冷滚打中的成形机理,将40Cr宏观应力变化和位错密度变化机理相结合,得到了40Cr位错密度变化曲线；基于位错密度变化的微观组织演变模型,建立了40Cr位错密度变化模型,并验证了该模型的正确性；利用XRD实验得到40Cr在不同变形条件下的XRD图谱,结合Dunn公式求得40Cr在不同变形条件下各个晶面及晶面整体位错密度变化。通过模型验证和试验分析,进一步从微观角度解释了40Cr在冷滚打成形过程中的变化规律。


关键词: 冷滚打, 位错密度, 微观变化模型, XRD实验

Abstract:

In order to discover the forming mechanism of 40Cr in
a cold roll-beating process,the 40Cr macro stress was combined with the
dislocation density change mechanism and the 40Cr dislocation density curves
were obtained.Based on the evolution model of micro structure about dislocation density,a change model of the 40Cr was established and the accuracy of the model was
verified.XRD was applied to measure spectrums in the different deformation conditions,combined with
the Dunn formula obtained from 40Cr various crystal surfaces and the
crystal surface as a whole dislocation density
changes under different deformation conditions.By the model validation and test
analysis,the change rules of 40Cr will be further explained from the microscopic view.

Key words: cold roll beating, dislocation density, micro change model, X-ray diffraction(XRD) experiment

中图分类号:

TG115.22

王晓强1, 崔凤奎1, 燕根鹏1, 李玉玺2. 40Cr冷滚打成形中位错密度变化研究[J]. 中国机械工程, 2013, 24(16): 2248-2252,2256.

WANG Xiao-Jiang-1, CUI Feng-Kui-1, YAN Gen-Feng-1, LI Yu-Xi-2. Study on Dislocation Density Change during Cold Roll-beating of 40Cr[J]. China Mechanical Engineering, 2013, 24(16): 2248-2252,2256.

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