The influence of different heat treatment cycles on controlled surface graphitization in CK45 steel

被引：2
|
作者：
Hamedi, Y. [2 ]
Kiani-Rashid, A. R. [1 ]
Shishegar, H. R. [2 ]
Azaat-Pour, H. R. [1 ]
机构：
[1] Ferdowsi Univ Mashhad, Dept Mat Engn, Fac Engn, Mashhad 91775111, Khorasan Razavi, Iran
[2] Sharif Univ Technol, Sch Mat Sci & Engn, Tehran, Iran
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2010年 / 492卷 / 1-2期
关键词：
Microstructures; Metallography; Metals and alloys; Diffusion;
D O I：
10.1016/j.jallcom.2009.12.036
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Controlled graphitization has become known as a practical method for improvement of wear resistance and machining properties in steels. In this paper, the effect of heat treatment on microstructure of CK45 steel has been investigated. Austenitising was carried out at 920 degrees C for 5 h. Besides, isothermal transformation was conducted at 750 degrees C in the time range of 1-20 h. In this work, full potential carbon resource was tried to be used around samples as a factor to prevent the burning of the limited carbon in steel and also to increase the percentage of sample surface carbon in order to improve wear capability and machining. The microstructure of the steel considerably changes by this heat treatment process which exhibits the effects of temperature, appropriate austenitising duration and isothermal transformation. Conducted experiments show a suitable distribution of semi-spherical graphite particles especially on the surface of the steel. Also, analyses demonstrate that the amount of formed graphite in the austenitising temperature 920 degrees C is more than graphite in single heat treatment temperature of 750 degrees C. (C) 2009 Elsevier B.V. All rights reserved.
引用
收藏
页码：739 / 744
页数：6
相关论文
共 50 条
12345