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Journal of Materials Engineering and Performance

, Volume 26, Issue 4, pp 1626–1633 | Cite as

Rapid Tempering of Martensitic Stainless Steel AISI420: Microstructure, Mechanical and Corrosion Properties

  • Bijan Abbasi-Khazaei
  • Akbar Mollaahmadi
Article
  • 263 Downloads

Abstract

In this research, the effect of rapid tempering on the microstructure, mechanical properties and corrosion resistance of AISI 420 martensitic stainless steel has been investigated. At first, all test specimens were austenitized at 1050 °C for 1 h and tempered at 200 °C for 1 h. Then, the samples were rapidly reheated by a salt bath furnace in a temperature range from 300 to 1050 °C for 2 min and cooled in air. The tensile tests, impact, hardness and electrochemical corrosion were carried out on the reheated samples. Scanning electron microscopy was used to study the microstructure and fracture surface. To investigate carbides, transmission electron microscopy and also scanning electron microscopy were used. X-ray diffraction was used for determination of the retained austenite. The results showed that the minimum properties such as the tensile strength, impact energy, hardness and corrosion resistance were obtained at reheating temperature of 700 °C. Semi-continuous carbides in the grain boundaries were seen in this temperature. Secondary hardening phenomenon was occurred at reheating temperature of 500 °C.

Keywords

corrosion resistance mechanical properties SEM TEM XRD 

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Copyright information

© ASM International 2017

Authors and Affiliations

  1. 1.Department of Materials Engineering, Faculty of EngineeringRazi UniversityKermanshahIran

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