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Deform-3D热轧钢板淬火过程的温度场模拟

时间:2017-03-28 19:07来源:毕业论文
论文利用Deform-3D有限元模拟软件对热轧钢板淬火过程的温度场进行数值模拟,计算了钢板在不同终淬温度和不同冷却速度条件下的瞬态温度场分布云图和沿钢板宽度方向上的温差曲线和

摘要:本论文利用Deform-3D有限元模拟软件对热轧钢板淬火过程的温度场进行数值模拟,计算了钢板在不同终淬温度和不同冷却速度条件下的瞬态温度场分布云图和沿钢板宽度方向上的温差曲线和温度梯度曲线。模拟结果表明:淬火过程中,钢板表面的温降最明显,温度从表面向心部逐渐上升。随着终淬温度的升高和冷速的加快,使得钢板内部的温差增大,极易导致钢板表面和心部温度与组织不均匀,生成非全马氏体组织,从而导致钢板内部产生残余应力。因此,考虑到现场实际情况并结合研究结果,制定出了较佳的淬火工艺,即终淬温度50℃为较佳的终淬温度,冷却速度30℃/s为较佳的冷速。最后,通过显微组织的观察和硬度测试的分析,发现终淬温度升高,硬度值依次下降;冷速越快,硬度值随之增加,与之前的模拟结果定性符合。6798
关键词:有限元;热轧钢板;温度场;淬火;数值模拟
The temperature field simulation for the hot-rolling sheet steel in the process of Quenching
Abstract:In this paper, the finite element software DEFORM-3D was used to simulate and calculate the temperature field in Hot Rolled Steel plate during the quenching process, and thus the distributions of transient temperature fields of the steel plate at various quenching temperature and cooling speed, the curves of temperature difference and temperature gradient along the width direction. The results show that: during the quenching process, temperature drop is the most obvious on the surface of the steel plate, and gradually temperature rises from the surface to the core. With the increase of quenching temperature and cooling speed speeding up, the difference in temperature of the plate will be increased. It may easily induce non-uniform microstructure in plate and generate not all martensite, and then, lead to produce structure stress and residual stress in steel internal. Therefore, considering the actual site of factory and combine with the research results, we make the best of quenching process. And 50℃ is a better end quenching temperature, 30℃/s is a better cooling rate. Finally, through the analysis of the microstructure observation and hardness test, we can discover that the higher end quenching temperature be, the more hardness value will decrease; the faster the cooling speed be, the more hardness value will increase, and which qualitatively fits the previous simulation results.

源`自*六)维[论*文'网www.lwfree.cn


Keywords:Finite Element Method; Hot Rolled Steel Plate; Temperature field; Quenching; numerical simulation
 
目  录
1 绪论    1
1.1 热轧钢板—低碳微合金高强度钢的简介    1
1.1.1低碳微合金板材的发展与现状    1
1.1.2低碳微合金板材的组织特点    1
1.2 热轧钢板的淬火    2
1.2.1淬火原理    2
1.2.2淬火工艺    2
1.2.3淬火过程的温度场模拟    3
1.3 有限元模拟技术在热轧钢板温度场中的应用    5
1.3.1淬火过程计算机模拟的研究现状    5
1.3.2淬火过程常用的数值模拟方法    6
1.4选题的目的和意义    6
1.5课题的研究内容    7
1.6本章小结    7
2 热处理数值模拟技术发展及特点    8
2.1国外热处理数值模拟技术发展    8
2.2我国热处理数值模拟技术发展    9
3 DEFORM有限元分析软件    11
3.1 DEFORM-3D特点    11
3.2 DEFORM-3D系统结构    11
3.3 DEFORM-3D的功能    12
3.4 DEFORM-HT模块介绍    12
3.5 本章小结    12 Deform-3D热轧钢板淬火过程的温度场模拟:http://www.lwfree.cn/cailiao/20170328/4494.html
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