Hot deformation and processing maps of K310 cold work tool steel

被引：23
作者：
Ezatpour, H. R. [1 ]
Sajjadi, S. A. [1 ]
Haddad-Sabzevar, M. [1 ]
Ebrahimi, G. R. [1 ]
机构：
[1] Ferdowsi Univ Mashhad, Fac Engn, Dept Met & Mat Engn, Mashhad, Iran
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2012年 / 550卷
基金：
中国国家自然科学基金;
关键词：
Tool steel; Compression test; Hot deformation; Processing map; DDRX; HIGH-TEMPERATURE DEFORMATION; DYNAMIC RECRYSTALLIZATION; ALLOYS; IRON;
D O I：
10.1016/j.msea.2012.04.049
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Hot working response of cold work tool steel K310 was investigated by means of compression test at temperature range of 900-1100 degrees C. The equivalent strain rates used in these tests were 0.01, 0.1 and 1 s(-1), respectively in order to obtain the processing and stability maps of the studied material following the Dynamic Material Model. All the zones of flow instability were studied through scanning electron microscopy (SEM). The microstructure of the samples after deformation was then analyzed by light microscopy and the differences were compared together. The steady state stress obtained from the flow curves was related to strain rate ((epsilon) over dot) and temperature (T) by means of the well known Zener-Holloman equation. A least square analysis of the data led to n = 3.95 and Q(DRX) = 219.65 kJ/mol and alpha = 1.2 x 10(-2) MPa-1. Also, hardness results showed that by increasing strain from peak to steady state strain, hardness was decreased. (c) 2012 Elsevier B.V. All rights reserved.
引用
收藏
页码：152 / 159
页数：8
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