摘要
利用有限元软件子程序FILM和UMATHT对403不锈钢锻件喷淬过程进行了数值模拟,研究了不同喷水强度对锻件淬火过程温度场、组织场的影响。结果表明:喷水强度在10~90 L/(m^2·s)时,锻件奥氏体组织主要转变为马氏体(M)、铁素体及碳化物(F+C),而马氏体主要分布在锻件横截面的外围,形成强韧性较高的壳体包裹锻件截面心部的铁素体及碳化物。此外,锻件表面的喷水强度越大,表层的冷却速率越大,但对锻件横截面表层的马氏体区域面积增大并无明显的促进作用。喷水强度从10 L/(m^2·s)增大到50 L/(m^2·s)的过程中,锻件心部的冷却速率逐渐增大,而当喷水强度增大到50 L/(m^2·s)之后,锻件心部的冷却速率基本保持恒定,相变发生的时间也越来越接近。
The finite element software subroutines FILM and UMATHT were used to simulate the temperature and microstructure under different spray water intensities during quenching process of 403 stainless steel forging.The results show that austenite is mainly transformed into martensite(M),ferrite and carbide(F+C).When the water spray intensity is between 10 and 90 L/(m^2·s),martensite is distributed in the surface layer of the forging section,and ferrite and carbide are generated in the core of the forging section.In addition,the cooling rate of the surface layer is greater with the higher water spray intensity on the surface of the forging,but there is no obvious promotion on the area of the martensite in the surface layer of the forging section.The cooling rate in the core of the forging section is gradually increasing when the water spray intensity increases from 10 to 50 L/(m^2·s).However,the cooling rate in the core of the forging section keeps constant and the time of phase transformation becomes more and more close when the water spray intensity reaches 50 L/(m^2·s).
作者
朱有鑫
李萌蘖
卜恒勇
张自生
Zhu Youxin;Li Mengnie;Bu Hengyong;Zhang Zisheng(Faculty of Materials Science and Engineering,Kunming University of Science and Technology,Kunming Yunnan 650093,China;Guizhou Aerospace Xinli Forging and Casting Co.,Ltd.,Zunyi Guizhou 563003,China)
出处
《金属热处理》
CAS
CSCD
北大核心
2019年第12期219-225,共7页
Heat Treatment of Metals
基金
国家重点研发计划(2017YFB0701804)
关键词
403不锈钢
数值模拟
温度场
组织场
403 stainless steel
numerical simulation
temperature field
microstructure field
