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Multi-pass welding behavior of austenitic and martensitic stainless steels using SYSWELD.

机译:使用SYSWELD的奥氏体和马氏体不锈钢的多道次焊接行为。

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摘要

The purpose of this research is to examine how post-welding behavior is influenced by the selection of initial materials and welding processes. In order to compare the welding results, two different materials -- AISI 304 and AISI 420 stainless steels -- are selected, and the welding processes are performed computationally using a finite element code SYSWELD with Goldak's numerical arc welding heat input modeling. The stainless steels are subject to phase transformation while the heated weld cools down, and it is shown that the phase transformation has a great effect on the welding behavior. This research is based on 3D analyses using relatively slow welding speeds. The welding results are classified into two categories -- welding deformations and residual stresses. To develop the research, a fin-to-tube, a welded assembly used in boiler applications, is employed to compare lateral and longitudinal deformations. The distribution of stresses and the nature of the welding distortion are described in detail.
机译:这项研究的目的是研究焊接后的行为如何受到初始材料和焊接工艺的选择的影响。为了比较焊接结果,选择了两种不同的材料-AISI 304和AISI 420不锈钢,并使用具有Goldak数值弧焊热输入模型的有限元代码SYSWELD以计算方式执行了焊接过程。不锈钢在加热的焊缝冷却时会发生相变,这表明相变对焊接行为有很大的影响。这项研究基于使用相对较慢的焊接速度的3D分析。焊接结果分为两类-焊接变形和残余应力。为了开展这项研究,采用了翅片到管(锅炉应用中使用的焊接组件)来比较横向和纵向变形。详细描述了应力的分布和焊接变形的性质。

著录项

  • 作者

    Koo, Bon Seung.;

  • 作者单位

    Lehigh University.;

  • 授予单位 Lehigh University.;
  • 学科 Engineering Mechanical.
  • 学位 M.S.
  • 年度 2010
  • 页码 104 p.
  • 总页数 104
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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