摘 要

本文是对20CrMnTi钢固体渗碳工艺的研究。我们研究的方法是通过实际的对20CrMnTi钢试样进行固体渗碳，通过控制炉温和时间来获得试样，再通过对试样用金相法获得渗碳层深度，然后用Origin软件获得图表，最后是对图表的分析来获得渗碳温度、保温时间以及渗碳层深度之间的关系。从对图表的分析中可以看出渗碳温度越高，保温时间越久，渗碳层深度也就越深，然后渗碳温度越高，保温时间越久，试样中产生的缺陷也就越多，容易产生粗大晶粒。而渗碳温度较低，保温时间较短时，渗碳就不充分，渗层也很浅。在此次研究中，我们使用了Image-Pro Plus这个软件来获得亚共析层的碳含量的变化趋势。

关键词：固体渗碳;碳势;渗碳温度;保温时间;Origin;Image-Pro Plus

Abstract

In this paper, is a study on the solid carburizing process of 20CrMnTi steel. The method that we studied is through actual of 20CrMnTi steel samples by solid carburizing,by controlling the temperature and time to obtain samples,through the sample by metallographic method to obtain the depth of carburized layer,then use the software of Origin access to charts,and analysis to obtain the carburizing temperature,holding time and the relationship between the depth of carburized layer ong the chart.From the analysis of graphs can be seen in the carburizing temperature is high,heat preservation time is long,the deeper the depth of carburized layer,and then the higher the carburizing temperature,heat preservation time is long,the defects of the sample produced in more,prone to coarse grain.the carburizing temperature is low,the heat preservation time is short,carburizing is not sufficient,the infiltration layer is also very shallow.In this study,we used the software of Image-Pro Plus to obtain the trend of the carbon content of hypoeutectoid layers.

Key Words: pack carburizing; carbon potential; carburizing temperature; soaking time; Origin; Image-Pro Plus

目录

第一章 绪论............................................................1

1.1古代的固体渗碳....................................................1

1.1.1焖熬法固体渗碳................................................1

1.1.2灼烧法固体渗碳................................................1

1.2固体渗碳的发展....................................................1

1.2.1固体渗碳工艺的发展............................................1

1.2.2固体渗碳剂的发展..............................................2

1.3固体渗碳原理......................................................2

1.4固体渗碳钢材的选用................................................3

1.5固体渗碳后产生的缺陷..............................................4

第二章 实验方案设计与实验设备..........................................6

2.1实验仪器设备及试剂................................................6

2.1.1实验仪器设备..................................................6

2.1.2实验试剂......................................................8

2.2渗碳工艺参数的确定................................................8

2.2.1渗碳碳势的选择................................................8

2.2.2渗碳温度的选择................................................9

2.2.3渗碳时间的选择...............................................10

2.3工艺设备及试样的准备.............................................10

2.3.1渗碳箱的选择.................................................10

2.3.2渗碳剂的选择.................................................11

2.3.3样品在渗碳前的处理...........................................11

2.4装炉与升温.......................................................11

2.5样品在渗碳后的处理...............................................12

2.5.1样品的切割...................................................12

2.5.2样品的镶嵌...................................................12

2.5.3样品的打磨...................................................12

2.5.4样品的抛光...................................................13

2.5.5样品的侵蚀...................................................13

2.5.6样品的观察...................................................14

2.5.7用IPP软件获得亚共析层含碳量的变化............................14

1. 实验结果与分析.................................................16

3.1实验过程发现的问题...............................................16

3.2实验数据的分析...................................................17

第四章 结论...........................................................21

参考文献..............................................................22

致谢..................................................................23

第一章 绪论