14th International Conference on Shot Peening

Surface Mechanical Attrition Treatment effect on nitriding treatment of a Z38CDV5 (X37CrMoV5-1) martensitic steel

Gallitelli D, Rouhaud E, Retraint D

LASMIS, University of Technology of Troyes, 10004 Troyes, France

Europe Technologies-SONATS, 44475 Carquefou, France

Introduction

Mechanical parts are subjected to many types of conditions that lead to part failure, such as corrosion, stress and strain, fatigue, etc. Technological research aims to avoid this failure, or to delay it as much as possible. The main objective is to improve the mechanical properties specific to the use of the part. Many treatments aim to increase the mechanical properties of materials. In this work, a thermochemical treatment such as nitriding and a mechanical treatment such as ultrasonic shot peening or mechanical surface attrition treatment (SMAT) were performed on a martensitic steel.

Objectives

The use of SMAT technology before the nitriding process could reduce time and cost. Nitriding and ultrasonic shot peening (USP) were analyzed separately before being coupled. The aim of this work is to combine nitriding with SMAT in order to make this thermochemical technology more effective. A complete analysis of several mechanical properties such as micro-hardness, nano-indentation, roughness, residual stress field and X-ray diffraction analysis was carried out on a Z38CDV5 (X37CrMoV5-1) steel.