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材料研究学报  2013, Vol. 27 Issue (2): 167-172    
  研究报告 本期目录 | 过刊浏览 |
喷射成形M4高速钢的高温热变形及组织演变*
王和斌 张金祥 卢林 侯陇刚 崔华 黄进峰 张济山
(北京科技大学新金属材料国家重点实验室 北京 100083)
High-temperature Thermal Deformation and Microstructure Evolution of Spray Formed M4 High Speed Steel
WANG Hebin ZHANG Jinxiang LU Lin HOU Longgang CUI Hua
HUANG Jinfeng ZHANG Jishan**
(State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing,
Beijing 100083)
引用本文:

王和斌 张金祥 卢林 侯陇刚 崔华 黄进峰 张济山. 喷射成形M4高速钢的高温热变形及组织演变*[J]. 材料研究学报, 2013, 27(2): 167-172.
. High-temperature Thermal Deformation and Microstructure Evolution of Spray Formed M4 High Speed Steel[J]. Chinese Journal of Materials Research, 2013, 27(2): 167-172.

全文: PDF(5443 KB)  
摘要: 使用热模拟试验机在变形温度为950 ℃—1150 ℃, 变形速率为0.01 s-1—10 s-1、总应变为0.7的条件下对喷射成形M4高速钢进行热压缩变形, 建立了热变形本构方程并计算了热变形激活能。同时, 对不同状态沉积态合金的组织进行了表征。结果表明, 沉积态M4高速钢晶粒细小、均匀, 无宏观偏析; 热变形时表现出显著的动态再结晶特征, 且变形温度和应变速率对合金流变应力影响显著; 变形温度对碳化物的形貌和分布也有较大的影响。
关键词 金属材料喷射成形组织热变形高速钢    
Abstract: The hot compression deformation behavior of the spray-formed M4 high speed steel was investigated on thermal simulator at the temperature of 950 ℃-1150 ℃, strain rate of 0.01 s-1-10 s-1 and total strain of 0.7. The hot deformation constitutive equation for this alloy was obtained as well as the hot deformation activation energy. And the microstructures of the as-deposited alloy at different states were characterized presently. It is shown that the microstructure of the as-deposited M4 high speed steel possesses much finer and uniform-distributed grains without macrosegregation than the as-cast M4 high speed steel. The dynamic recrystallization are prominently performed during the deformation and the flow stresses are greatly affected by the temperature and strain rate. The morphology and distribution of the carbides are obviously influenced by the deformation temperature.
Key wordsmetallic materials    spray forming    structure    thermal deformation    high speed steel
    
ZTFLH:  TG142  
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