The influence of laser re-melting on microstructure and hardness of gas-nitrided steel-Reference-Cited by-同舟云学术

The influence of laser re-melting on microstructure and hardness of gas-nitrided steel

Published:2016-12-01 Issue:1 Volume:36 Page:18-22
ISSN:2450-9469
Container-title:Archives of Mechanical Technology and Materials
language:en
Short-container-title:

Author:

Panfil Dominika¹,Wach Piotr²,Kulka Michał¹,Michalski Jerzy²

Affiliation:

1. Poznan University of Technology, Piotrowo 3 Street, 60-965 Poznan, Poland

2. Institute of Precision Mechanics, Warsaw, Poland

Abstract

Abstract In this paper, modification of nitrided layer by laser re-melting was presented. The nitriding process has many advantageous properties. Controlled gas nitriding was carried out on 42CrMo4 steel. As a consequence of this process, ε+γ’ compound zone and diffusion zone were produced at the surface. Next, the nitrided layer was laser remelted using TRUMPF TLF 2600 Turbo CO2 laser. Laser tracks were arranged as single tracks with the use of various laser beam powers (P), ranging from 0.39 to 1.04 kW. The effects of laser beam power on the microstructure, dimensions of laser tracks and hardness profiles were analyzed. Laser treatment caused the decomposition of continuous compound zone at the surface and an increase in hardness of previously nitrided layer because of the appearance of martensite in re-melted and heat-affected zones

Publisher

Walter de Gruyter GmbH

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