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Increasing of the superficial hardness of a coupling system realized from a low carbon steel ST37-2 by surface treatment with Nd:YAG laser

O. TURCAN1,* , O. DONTU1, J. L. OCANA MORENO2, I. VOICULESCU1, D. SAVASTRU3, I. M. VASILE1

Affiliation

  1. Politehnica University of Bucharest, Romania
  2. Universidad Politecnica de Madrid, Spania
  3. National Institute for Optoelectronics, Magurele-Ilfov, Romania

Abstract

This paper presents a study of the hardening effects on a coupling system realized from a low carbon steel ST37-2 by applying a laser surface treatment, on a well defined zone. The paper aim is to approach a technological point of view regarding the possibility of a superficial local hardening on hydraulic coupling system made from ST37-2 mild steel. By varying the laser process parameters the result was an increase in hardness, from 150 HV1 in the initial base material, to 550HV1 in a layer with the depth of 700 μm. The optimal values of the laser processing treatment have been obtained by the theoretical calculation of the cooling velocity in temperature domain of 800oC and 500oC..

Keywords

Heat treatment, Nd:YAG laser, Surface heat treatment, Push-in coupling system, ST37-2.

Submitted at: Aug. 6, 2013
Accepted at: Jan. 22, 2014

Citation

O. TURCAN, O. DONTU, J. L. OCANA MORENO, I. VOICULESCU, D. SAVASTRU, I. M. VASILE, Increasing of the superficial hardness of a coupling system realized from a low carbon steel ST37-2 by surface treatment with Nd:YAG laser, Journal of Optoelectronics and Advanced Materials Vol. 16, Iss. 1-2, pp. 20-24 (2014)