Effect of Gas Content on Mechanical behavior of Case Hardened Boron Steel Paper No.: 2023-DF-9 Section Research Papers

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M. K. Krishnamoorthy
G. K. Sivakumar
Dr. Koorella Krishna

Abstract

Boron containing steels are widely used in gear and shaft application. Addition of Boron to case hardened steel enhances hardenability resulting in good impact strength and wear resistant properties. In this present study, the influence of 100 and 150 PPM Nitrogen gas on Boron steel has been analyzed. The microstructure, hardenability, hardness, and impact strength has been evaluated. The Impact test was carried out as per standard and Fractography analysis has been done. Fine grain structure was observed in the higher Nitrogen content samples indicates better mechanical properties. The impact strength has been improved nearly 9% in the higher Nitrogen containing samples because of fine grain structure. Combination of intergranular with dimple mode of fracture was observed in the high Nitrogen containing samples.


Keywords: Boron steel, Nitrogen, Impact strength, Case hardening, Electric arc furnace (EAF)


 

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Author Biographies

M. K. Krishnamoorthy, Ashok Leyland Technical Center, Vellivayal Chavadi, Manali New Town, Chennai, Tamil Nadu 600103, India

Corresponding Author
M. K. Krishnamoorthy
MED PD
Ashok Leyland Technical Center, Vellivayal Chavadi, Manali New Town, Chennai, Tamil Nadu 600103, India
Email: Koorella.krishna@ashokleyland.com

 

G. K. Sivakumar, Ashok Leyland Technical Center, Vellivayal Chavadi, Manali New Town, Chennai, Tamil Nadu 600103, India

 

 

Dr. Koorella Krishna, Ashok Leyland Technical Center, Vellivayal Chavadi, Manali New Town, Chennai, Tamil Nadu 600103, India

 

 

How to Cite
M. K. Krishnamoorthy, G. K. Sivakumar, & Dr. Koorella Krishna. (2023). Effect of Gas Content on Mechanical behavior of Case Hardened Boron Steel: Paper No.: 2023-DF-9. ARAI Journal of Mobility Technology, 3(2), 625–629. https://doi.org/10.37285/ajmt.3.2.9

References

  1. Nipon Taweejun and Chaosuan Kanchanomai. “Effects of Carbon and Nitrogen on the Microstructure and Mechanical Properties of Carbonitrided Low-Carbon Steel”. ASM International. published online October 30, 2015
  2. A. Verma, K. Gopinathan and S.B. Sarkarb. “Boron Steel: An Alternative for Costlier Nickel and Molybdenum Alloyed Steel for Transmission Gears”. The Journal of Engineering Research, received 17 May 2009; accepted 4 October 2009.
  3. Dr Eng. Frydman S., M. Sc. Eng. Letkowska B. Random. “Properties of Boron Steel After Different Heat Treatments”, Wroclaw University of Technology.