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首页> 外文期刊>Materials Science and Engineering >Effects of rapid heating and uniaxial loading on the phase transformation and mechanical properties of direct partial remelted butt joint of AISI D2 tool steel
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Effects of rapid heating and uniaxial loading on the phase transformation and mechanical properties of direct partial remelted butt joint of AISI D2 tool steel

机译：快速加热和单轴载荷对AISI D2工具钢直接偏复熔对接接头相变性能和机械性能的影响

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摘要

Tool steels are widely used in various industries, such as automotive, shipbuilding, manufacturing, and marine, for rolling mills, blanking metals, and punching dies, given their distinctive hardness, resistance to abrasion, and deformation. However, joining tool steels using the conventional fusion welding process is difficult because of the formation of dendritic structures and hot cracking, which affect the strength of joining. Therefore, this study proposed the direct partial remelting process (DPRMP) for the butt joining of AISI D2 tool steel. Moreover, different uniaxial loads of 0, 0.5, 2.5, and 5 N were applied during the joining process to investigate the microstructural evolution and mechanical properties of DPRMP samples. Results showed that the ferrite phase in the base material was changed to the austenite phase with globular shape in the joined samples through DPRMP. In addition, increasing the uniaxial load from 0 N to 5 N reduced the average grain size, increased the shape factor, and caused joining defects, such as voids, to disappear. Furthermore, the tensile strength of the DPRMP samples improved by increasing uniaxial loading from 0 N to 5 N due to the effect of grain boundary diffusion and the decrease in eutectic carbide at the joint interface. The highest tensile strength was achieved in DPRMP-5, with a value of 652 MPa and a welding efficiency of 103%. Moreover, the average hardness value of the fusion zone improved in the DPRMP samples and increased to 400 HV wherein the as-received material presented a value of 226 HV.
机译：赋予各种行业的工具钢广泛用于汽车，造船，制造和船舶，用于滚动轧机，消隐金属和冲孔模具，鉴于它们的独特硬度，耐磨损和变形。然而，由于树枝状结构和热裂纹的形成，使用传统熔接过程的连接工具钢是难以影响的，这影响了连接的强度。因此，本研究提出了AISI D2工具钢的对接连接的直接部分重熔过程（DPRMP）。此外，在接合过程中施加不同的单轴载荷为0,0.5,2.5和5n，以研究DPRMP样品的微观结构演化和机械性能。结果表明，通过DPRMP在连接的样品中，基材中的铁氧体相变为奥氏体相。另外，将单轴载荷从0 n至5 n增加降低了平均晶粒尺寸，增加了形状因子，并导致连接缺陷，例如空隙，消失。此外，由于晶界扩散的效果和关节界面处的共晶碳化物减少，通过增加单轴载荷，通过增加单轴载荷来改善DPRMP样品的拉伸强度。在DPRMP-5中实现的最高拉伸强度，值为652MPa，焊接效率为103％。此外，融合区的平均硬度值在DPRMP样品中改善并增加至400HV，其中接收的材料呈现出226HV的值。

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  • 来源
    《Materials Science and Engineering》 |2020年第21期|140250.1-140250.12|共12页
  • 作者

    Fadzilah Adrian; Zainuddin Sajuri; Amir Hossein Baghdadi; Mohd Zaidi Omar;

  • 作者单位

    Department of Mechanical and Manufacturing Engineering Faculty of Engineering and Built Environment Universal Kebangsaan Malaysia 43600 Bangi Selangor Malaysia;

    Department of Mechanical and Manufacturing Engineering Faculty of Engineering and Built Environment Universal Kebangsaan Malaysia 43600 Bangi Selangor Malaysia;

    Department of Mechanical and Manufacturing Engineering Faculty of Engineering and Built Environment Universal Kebangsaan Malaysia 43600 Bangi Selangor Malaysia;

    Department of Mechanical and Manufacturing Engineering Faculty of Engineering and Built Environment Universal Kebangsaan Malaysia 43600 Bangi Selangor Malaysia;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    DPRMP; Tool steel; Uniaxial load; Microstructure; Mechanical properties;

    机译：DPRMP;工具钢;单轴载荷;微观结构;机械性能;

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