Effect of deep cryogenic treatment on surface chemistry and microstructure of selected high-speed steels

Jovicevic-Klug Patricia; Jenko Monika; Jovicevic-Klug Matic; Batic Barbara Setina; Kovac Janez; Podgornik Bojan

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Effect of deep cryogenic treatment on surface chemistry and microstructure of selected high-speed steels

机译：深冷冻处理对所选高速钢材表面化学和微观结构的影响

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The purpose of this study is to provide a systematic, complementary research of deep cryogenically treated (DCT) steels AISI M2, M3:2 and M35 including scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), electron backscatter diffraction (EBSD) and X-ray photoelectron spectroscopy (XPS). The DCT effect on selected steels was analyzed through modification of microstructure, chemical composition, phase change and chemical state of the present elements, when comparing conventional heat-treated (CHT) and DCT samples. The XPS results provide input into the understanding of oxidation dynamics of DCT samples and DCT influence on the microstructure using EBSD, as the major interpretation tool. It is confirmed, that martensitic laths are sharper, smaller and generally more oriented along specific crystal directions of prior austenite grains within DCT samples compared to CHT counterparts. A first-time evaluation of oxidation states and oxygen absorbance of the surface of selected high-speed steels is conducted with XPS, which is correlated with the microstructural changes induced by DCT. Depth profile XPS analysis of CHT and DCT samples was also conducted that shows the oxidation layer thickness and elemental gradients. These results provide further understanding of DCT dynamic on the overall microstructure and the corresponding surface behavior of the selected steels.

机译：本研究的目的是提供对深冷冻处理（DCT）钢AISI M2，M3：2和M35的系统，互补的研究，包括扫描电子显微镜（SEM），能量分散X射线光谱（EDS），电子反向散射衍射（EBSD）和X射线光电子体光谱（XPS）。当比较常规热处理（CHT）和DCT样品时，通过改变本发明元素的微观结构，化学成分，相变和化学状态来分析对所选钢的DCT效应。 XPS结果提供了对DCT样品的氧化动力学和DCT对使用EBSD的微观结构的影响的理解，作为主要的解释工具。与CHT对应物相比，确认马氏体板条沿着DCT样品中的先前奥氏体晶体的特定晶体方向较小，并且通常更具更大的晶体方向。选择高速钢表面的氧化状态和氧吸收的第一次评估用XPS进行，其与DCT引起的微观结构变化相关。还进行了深度谱XPS分析CHT和DCT样品，其显示氧化层厚度和元素梯度。这些结果提供了对整体微观结构和所选钢的相应表面行为的DCT动态的进一步理解。

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《Applied Surface Science》 |2021年第15期|149257.1-149257.11|共11页
作者
Jovicevic-Klug Patricia; Jenko Monika; Jovicevic-Klug Matic; Batic Barbara Setina; Kovac Janez; Podgornik Bojan;
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Inst Met & Technol Lepi Pot 11 Ljubljana 1000 Slovenia|Jozef Stefan Int Postgrad Sch Jamova Cesta 39 Ljubljana 1000 Slovenia;

Inst Met & Technol Lepi Pot 11 Ljubljana 1000 Slovenia|Jozef Stefan Int Postgrad Sch Jamova Cesta 39 Ljubljana 1000 Slovenia;

Inst Met & Technol Lepi Pot 11 Ljubljana 1000 Slovenia;

Inst Met & Technol Lepi Pot 11 Ljubljana 1000 Slovenia;

Jozef Stefan Int Postgrad Sch Jamova Cesta 39 Ljubljana 1000 Slovenia|Inst Jozef Stefan Dept Surface Technol & Optoelect F4 Jamova cesta 39 Ljubljana 1000 Slovenia;

Inst Met & Technol Lepi Pot 11 Ljubljana 1000 Slovenia|Jozef Stefan Int Postgrad Sch Jamova Cesta 39 Ljubljana 1000 Slovenia;

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正文语种 eng
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High-speed steel; Deep cryogenic treatment (DCT); Scanning electron microscope (SEM); Energy-dispersive X-ray spectroscopy (EDS); Electron backscatter diffraction (EBSD); X-ray photoelectron spectroscopy (XPS);

机译：高速钢;深冷冻处理（DCT）;扫描电子显微镜（SEM）;能量分散X射线光谱（EDS）;电子反向散射衍射（EBSD）;X射线光电子谱（XPS）;

Effect of deep cryogenic treatment on surface chemistry and microstructure of selected high-speed steels

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