Heat treatment atmospheres
Article REF: M1220 V2

Heat treatment atmospheres

Authors : Patrick COPPIN, Benoît LHOTE, Meryem BUFFIN, Serban CANTACUZÈNE

Publication date: March 10, 2000 | Lire en français

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AUTHORS

  • Patrick COPPIN: Engineer from École Centrale de Paris - Doctor of Materials Science - International Metallurgy Market Manager at L' Air Liquide

  • Benoît LHOTE: Engineer from École Centrale de Paris - Thermal Treatment Program Manager for France at L' Air Liquide

  • Meryem BUFFIN: Civil Engineer in Materials Science, Université Catholique de Louvain - Heat Treatment Research Engineer at L'Air Liquide's Claude Delorme Research Center

  • Serban CANTACUZÈNE: Engineer from École Nationale Supérieure d'Électrochimie et d'Électrométallurgie de Grenoble (ENSEEG) - Doctor of Materials Science - Heat Treatment Research Engineer at L'Air Liquide's Claude Delorme Research Center

 INTRODUCTION

Today, the use of gaseous atmospheres for the thermal treatment of metals has become the norm. In addition, the growing demand for quality and the need to control and reproduce this quality have led to the use of increasingly sophisticated and regulated quality atmospheres.

This trend has led to the launch of new solutions for the supply of atmospheres and control equipment: atmosphere is now an essential component of heat treatment in the same way as the control of thermal parameters.

Gaseous atmospheres used in furnaces are generally made up of mixtures of several gases (N 2 , H 2 , CO, Ar, He) with traces of impurities (O 2 , H 2 O, CO 2 , CH 4 ). The overall properties of these atmospheres depend on the intrinsic characteristics of the unit mixtures and therefore on the atmosphere supplier's ability to ensure quality and reproducibility.

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