Effect of heat treatment process on microstructure and properties of S47450 bolt
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Siyou Tao
male, born in 1997, is a postgraduate researcher of Hefei University of Technology in Hefei, China, with research interests in high-performance metal materials.
male, born in February 1966, Doctor, professor, doctoral supervisor, school of materials science and engineering, Hefei university of technology. He graduated from Hefei university of technology with a master’s degree in materials science in 1993, and then taught in the university. He graduated from Hefei university of technology with a doctor’s degree in materials science in 2006. Mainly engaged in the research and development of high-performance metal materials.
Abstract
The effects of heat treatment process on the microstructure and mechanical properties of S47450 bolt materials were studied by optical microscope (OM), scanning electron microscope (SEM), X-ray diffraction (XRD), tensile test, impact test and hardness test. The results showed that in the temperature range selected by the test, the quenched martensite of the bolt material after quenching at 1070 °C and tempering at 670 °C was fully refined and evenly distributed, and the precipitation of Cr23C6 played the role of precipitation hardening. It showed the excellent comprehensive mechanical properties, with the Brinell hardness reaching 295 HBW and the tensile strength of 1035 MPa. The elongation was 16 %, and the impact energy at room temperature was 21 J.
Kurzfassung
Der Einfluss der Wärmebehandlung auf die Mikrostruktur und die mechanischen Eigenschaften eines Bolzens aus S47450 wurden mittels Lichtmikroskopie (LM), Rasterelektronenmikroskopie (REM), Röntgenbeugung (XRD, X-ray diffraction), Zugversuchen, Kerbschlagbiegeversuchen sowie Härteprüfungen untersucht. Die Ergebnisse zeigen, dass im Temperaturbereich, der für die Untersuchungen gewählt wurde, der nach dem Abschrecken bei 1070 °C vorliegende Martensit durch Anlassen bei 670 °C vollständig gefeint und gleichmäßig verteilt vorliegt und dass durch die Ausscheidung von Cr23C6 eine Härte- und Festigkeitssteigerung erzielt wird. Neben einer Brinellhärte von 295 HBW und einer Zugfestigkeit von 1035 MPa wies der Werkstoff insgesamt hervorragende mechanische Eigenschaften auf. Die Bruchdehnung betrug 16 % und die Kerbschlagarbeit bei Raumtemperatur 21 J.
About the authors
male, born in 1997, is a postgraduate researcher of Hefei University of Technology in Hefei, China, with research interests in high-performance metal materials.
male, born in February 1966, Doctor, professor, doctoral supervisor, school of materials science and engineering, Hefei university of technology. He graduated from Hefei university of technology with a master’s degree in materials science in 1993, and then taught in the university. He graduated from Hefei university of technology with a doctor’s degree in materials science in 2006. Mainly engaged in the research and development of high-performance metal materials.
6 Acknowledgment
The author acknowledges the financial support from Science and Technology Project of Datang Electric Power Group (KY-201803), Lvsi Project of Datang Electric Power Group (KY-2019).
6 Danksagung
Der Autor dankt der Datang Electric Power Group für die finanzielle Unterstützung im Rahmen des Science and Technology Project (KY-2018-03, Lvsi Project of Datang Electric Power Group (KY-2019)).
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Articles in the same Issue
- Contents
- Editorial
- Editorial
- Comparison of LPBF-manufactured and rolled tensile test samples made of 17-4PH
- Effect of heat treatment process on microstructure and properties of S47450 bolt
- Failure analysis
- Excessive Lack of Fusion in Welds of Limited Accessibility
- Picture of the month
- Picture of the month
- People
- 2022 Henry Clifton Sorby Awardee: Professor Harry Bhadeshia
- News
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- Meeting diary
- Meeting diary
Articles in the same Issue
- Contents
- Editorial
- Editorial
- Comparison of LPBF-manufactured and rolled tensile test samples made of 17-4PH
- Effect of heat treatment process on microstructure and properties of S47450 bolt
- Failure analysis
- Excessive Lack of Fusion in Welds of Limited Accessibility
- Picture of the month
- Picture of the month
- People
- 2022 Henry Clifton Sorby Awardee: Professor Harry Bhadeshia
- News
- News
- Meeting diary
- Meeting diary
