Effect of heat treatment on hardness and wear resistance of high carbon-high chromium steel (FMU-11)

Authors

  • Alireza Darvishi Department of Technology, Ravanshir Steel Factory, Takestan, Iran http://orcid.org/0000-0001-5419-4726
  • Aria Daneshmayeh Graduate School of Materials Engineering, Azad University, Saveh, Iran
  • Alihosein Salehi Department of Technology, Ravanshir Steel Factory, Takestan, Iran
  • Mahdi Ahmadi Department of Production, Ravanshir Steel Factory, Takestan, Iran
  • Alireza Soleymani Department of Production, Ravanshir Steel Factory, Takestan, Iran

DOI:

https://doi.org/10.30544/596

Keywords:

heat treatment; mechanical properties; wear resistance; cryogenic treatment; cement mill.

Abstract

In the present study, microstructure, hardness, and abrasion resistance of a heat-treated high carbon-high chromium steel (FMU-11) used in the cement mills were investigated. To investigate the best heat-treating cycle for the FMU-11 steel, three sets of samples were heat treated. The first set was tempered two times, the second set was re-hardened, and the third set was cryogenically heat treated. These samples were then compared with the conventionally heat-treated samples. The samples' microstructure was studied using an optical microscope, where traditional black and white etching, as well as color etching, were used. Scanning electron microscopy (SEM) was applied for higher magnification studies and in-depth analysis of the chemical composition. The mechanical properties were investigated by measuring the hardness and the wear resistance for the samples heat-treated in different cycles. The results showed that the cryogenic treatment and double-tempered samples had the highest hardness and wear resistance. In addition, the results showed that the re-hardening operation caused the carbides to be finely separated and evenly distributed in the steel matrix. The wear test results illustrated that the wear mechanism could be the delamination wear and the abrasive wear combined.

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Published

2021-01-27

How to Cite

Darvishi, Alireza, Aria Daneshmayeh, Alihosein Salehi, Mahdi Ahmadi, and Alireza Soleymani. 2021. “Effect of Heat Treatment on Hardness and Wear Resistance of High Carbon-High Chromium Steel (FMU-11)”. Metallurgical and Materials Engineering 27 (4):541-56. https://doi.org/10.30544/596.

Issue

Vol. 27 No. 4 (2021): Steelmaking and processing - devoted to Prof. Ljubomir Nedeljković

Section

Steelmaking and processing - devoted to Prof. Ljubomir Nedeljković

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Copyright (c) 2021 Alireza Darvishi, Aria Daneshmayeh, Alihosein Salehi, Mahdi Ahmadi, Alireza Soleymani

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