摘要双相不锈钢自上世纪被研发后,其应用范围越来越广。但是在其性能的研究仍然不够深入。因而,本课题实验选取现今使用最为广泛的焊接方法手工电弧焊作为本课题实验的焊接方法对2205双相不锈钢板材进行焊接,然后根据实验方案观察板材接头,分析其宏观变形,再进行探讨。58965
本课题实验通过对其焊接后接头金相组织的观察,分析其焊接接头微观组织,发现焊接热循环时长影响奥氏体和铁素体两相的转化;根据板材拉伸断口形貌,判断出拉伸过程中应力集中影响断口断裂位置;最后从对2205双相不锈钢采取不同焊接方式所发生变形情况分析、比较,得出焊接方式和焊接参数共同影响双相不锈钢的横向收缩变形和角变形这一结论。通过本文实验研究和结论,期待为现今对2205双相不锈钢的研究提供数据的参考。
毕业论文关键词: 2205双相不锈钢,手工电弧焊,焊接接头,变形
Abstract Duplex stainless steel was developed since the last century,it is more and more widely used.However, there are still a lot of flaws about the study of its properties.Thus, in this subject, we will select a welding method as SMAW welding method for welding stainless steel plate 2205 duplex stainless steel, and then we will observe the plate according to the joint experimental program to analyze the macroscopic deformation and discuss.
We observed its welding joint microstructure and then we analyzed the microstructure of welded joints.We found that welding thermal cycle time impact of its transformation from austenite to ferrite.According to the sheet tensile fracture morphology, we determined the tensile stress in the course of the case.Finally,according the different welding deformation, we analyzed the impact the deformation of SMAW 2205.We found that transverse shrinkage and welding parameters affect the duplex stainless steel welding deformation and angular deformation.According to this subject,we expect it to provide data for the study of 2205 duplex stainless steel.
Keywords:2205 duplex stainless steel,SMAW, Welded joints,Deform
目 录
第一章 绪论 1
1.1双相不锈钢的概述 1
1.2 双相不锈钢的历史发展、性能及应用 1
1.2.1双相不锈钢的历史发展 1
1.2.2双相不锈钢性能特点 2
1.2.3双相不锈钢应用领域 3
1.3 双相不锈钢的焊接性 4
1.3.1常用的对双相不锈钢的焊接方法 4
1.3.2双相不锈钢工艺焊接性 6
1.4 双相不锈钢焊接变形的相关实验研究 6
1.5 选题背景及意义 7
1.6 本课题的主要研究内容 8
第二章 实验材料设备及研究方法 9
2.1 实验材料 9
2.2实验设备及步骤 10
2.2.1实验设备 10
2.2.2实验参数 12
2.2.3焊前准备 12
2.3 焊接接头性能测试 13
第三章 实验分析与讨论 15
3.1 金相组织 15
3.2 拉伸断口实验分析 2205双相不锈钢焊接变形控制控制与矫正技术研究:http://www.youerw.com/cailiao/lunwen_63990.html