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Reactive Boride Brazing on Low-Alloy Automotive Grade Steel

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Abstract

Brazing is a widely used process to improve the performance of steels used in automotive applications. The substrate material is often exposed to harsh conditions in these applications and may affect the service life of the component. Reactive boride brazing aims to improve the mechanical properties of the substrate material by forming a ceramic-metal composite coating in a single-step process in situ. In this study, sintered Ancor 4300 low-alloy steel is used as the substrate with chromium-rich braze and chromium-lean braze materials. The mechanical properties of the brazed samples were studied in detail using microindentation hardness measurements and the transverse rupture test. The results indicate that the brazed superlayer has a 10 times higher hardness. There was a significant improvement in the transverse rupture strength of the steel brazed with the chromium-rich boride as compared to the pure substrate material. In an effort to reduce processing time, green compacts of the substrate were also directly brazed and yielded favorable results.

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Author notes

  1. B. Palanisamy (Student)

    Present address: School of Mechanical, Industrial and Manufacturing Engineering, Oregon State University, Corvallis, OR, 97331, USA

Authors and Affiliations

  1. Department of Materials and Metallurgical Engineering, Indian Institute of Technology, Kanpur, 208016, UP, India

    B. Palanisamy (Student) & A. Upadhyaya (Professor)

Authors
  1. B. Palanisamy
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  2. A. Upadhyaya
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Correspondence to A. Upadhyaya.

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Manuscript submitted May 6, 2010.

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Palanisamy, B., Upadhyaya, A. Reactive Boride Brazing on Low-Alloy Automotive Grade Steel. Metall Mater Trans A 42, 3417–3424 (2011). https://doi.org/10.1007/s11661-011-0754-4

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  • DOI: https://doi.org/10.1007/s11661-011-0754-4

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