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Abstract <p>Plasma nitriding, instead of chromium plating, is proposed as an alternative surface-hardening technology for intake and exhaust valve stems made of 40Cr9Si2 and 55Cr20Mn9NNi4 steels after bulk hardening. Wear resistance of valve materials and the Bronze AlFe9-4 bushings that work with them was assessed individually and in combination. Conclusions are drawn regarding the influence of the chemical composition of heat-resistant steel and its surface hardening technology on wear resistance.</p>

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Investigation into the Influence of Plasma Nitriding Treatment on Wear Resistance Properties of Intake and Exhaust Valves

  • 期刊论文

  • 发表日期：

    2025年11月1日

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  • D. A. Boldyrev,
  • L. I. Popova

摘要

Abstract

Plasma nitriding, instead of chromium plating, is proposed as an alternative surface-hardening technology for intake and exhaust valve stems made of 40Cr9Si2 and 55Cr20Mn9NNi4 steels after bulk hardening. Wear resistance of valve materials and the Bronze AlFe9-4 bushings that work with them was assessed individually and in combination. Conclusions are drawn regarding the influence of the chemical composition of heat-resistant steel and its surface hardening technology on wear resistance.