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首页> 外文期刊>Metallic materials >Investigation of mechanical and microstructural properties of S 235 JR (ST 37-2) steels welded joints with FCAW
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Investigation of mechanical and microstructural properties of S 235 JR (ST 37-2) steels welded joints with FCAW

机译：用FCAW研究S 235 JR（ST 37-2）钢焊接接头的力学和显微组织性能

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摘要

Ship building industry has been growing and the industry struggling to meet the building and repairing needs. Ship building sector has started using flux cored arc welding technique that removes the negative effects of coated electrode and submerged arc welding techniques and has the superior properties of the gas metal arc welding technique regularly. In this study, S 235 JR (St 37-2) steel plates with 10 mm thickness have been welded 60° and butt welded on PA, PF and PE welding positions, in a CO_2 protective environment, with E71 T-1 rutile based wire electrode, and heat between increments kept stable. Hardness, tensile test, Charpy V-notch impact test, radiographic investigations, and lastly microscopic investigations were conducted in order to define the strength and microscopic properties of the weldments. As a result of these investigations, tensile strength and impact test results have been obtained for different welding positions. Hardness values were between limits set by IIW. According to the radiographic tests, for specimens welded on PE welding positions, the porosity is observed. Weld metal has been seen to have Widmannstaetten interior structure as a result of the fast cooling down on PF and PE positioned weldments, as seen on micrographs. Regions made of this interior structure were seen to be hard and brittle.
机译：造船业一直在增长，该行业正努力满足建造和维修的需求。造船业已开始使用药芯焊丝电弧焊技术，该技术可消除涂层电极和埋弧焊技术的负面影响，并定期具有气体金属电弧焊技术的优越性能。在本研究中，已将厚度为10 mm的S 235 JR（St 37-2）钢板焊接60°，并在CO_2保护环境中使用E71 T-1金红石基焊丝对接在PA，PF和PE焊接位置上电极，增量之间的热量保持稳定。为了确定焊件的强度和微观性能，进行了硬度，拉伸试验，夏比V型缺口冲击试验，射线照相研究和最后的显微研究。这些研究的结果是，获得了不同焊接位置的拉伸强度和冲击试验结果。硬度值在IIW设定的极限之间。根据射线照相测试，对于在PE焊接位置上焊接的样品，观察到了孔隙。如显微照片所示，由于PF和PE定位焊件的快速冷却，焊缝金属具有Widmannstaetten内部结构。这种内部结构制成的区域被认为是硬而脆的。

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  • 来源
    《Metallic materials》 |2014年第1期|59-65|共7页
  • 作者

    U. Soenmez; V. Ceyhun;

  • 作者单位

    Ege University, Engineering Faculty, Mechanical Engineering Department, Izmir, Turkey;

    Ege University, Engineering Faculty, Mechanical Engineering Department, Izmir, Turkey;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Flux Cored Arc Welding; microstructure; toughness;

    机译：药芯焊丝电弧焊;微观结构韧性;

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