添加FeSiMg后火焰硬化灰铸铁的显微组织演变及硬度的提高

IF 1.1 Q3 METALLURGY & METALLURGICAL ENGINEERING Acta Metallurgica Slovaca Pub Date : 2023-09-25 DOI:10.36547/ams.29.3.1794
Agung Setyo Darmawan, Agus Dwi Anggono, Agus Yulianto, Bambang Waluyo Febriantoko, None Masyrukan
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引用次数: 0

摘要

加入镁合金元素后进行火焰硬化处理将改变灰口铸铁的相结构。本研究旨在研究这两种工艺对合金显微组织和硬度的影响。镁的添加是通过添加FeSiMg作为镁的载体进行的。利用扫描电子显微镜(SEM)和能量色散x射线能谱仪(EDS)进行金相检查,观察微观结构的变化。形成的相用x射线衍射测试来检验。采用维氏法对灰口铸铁、球墨铸铁和火焰淬硬球墨铸铁的表面进行了硬度测试。而对于火焰硬化球墨铸铁,维氏技术也在横截面上进行。FeSiMg化合物的加入使片状石墨变成球形石墨,硬度从130 VHN提高到313.22 VHN。球墨铸铁的火焰硬化过程导致马氏体相的形成和材料表面石墨的消失。经火焰硬化处理后,材料表面硬度较基体提高了82.4%。
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MICROSTRUCTURE EVOLUTION AND HARDNESS IMPROVEMENT OF GRAY CAST IRON BY ADDITION OF FeSiMg FOLLOWED BY FLAME HARDENING PROCESS
The addition of magnesium alloy elements followed by a flame-hardening process will change the phase configuration in gray cast iron. This study aims to investigate changes in microstructure and hardness due to these two processes. The addition of magnesium is conducted by adding FeSiMg as a carrier for magnesium. Metallographic examination to observe changes in microstructure was carried out using a Scanning Electron Microscope (SEM) and Energy-Dispersive X-ray Spectroscopy (EDS). The formed phase is examined by X-Ray Diffraction testing. The hardness test was carried out using the Vickers technique on the surface of the gray cast iron, the nodular cast iron, and the flame-hardened nodular cast iron. Whilst for flame-hardened nodular cast iron, the Vickers technique was also conducted on a cross-section. The addition of the FeSiMg compound changed flake graphite into spherical graphite with increased hardness from 130 VHN to 313.22 VHN. The flame-hardening process in nodular cast iron results in the formation of a martensite phase and the disappearance of graphite on the surface of the material. The hardness on the surface of the material due to the flame-hardening process increased by 82.4% compared to the substrate.
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来源期刊
Acta Metallurgica Slovaca
Acta Metallurgica Slovaca METALLURGY & METALLURGICAL ENGINEERING-
CiteScore
2.00
自引率
30.00%
发文量
22
审稿时长
12 weeks
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