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1 Journal of Achievements in Materials and Manufacturing Engineering

1 2014

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The effect of the laser spots overlap on the structure during square parts quenching

Kirschner V., Švec M., Bruthansová R., Dvořák L.

Journal of Achievements in Materials and Manufacturing Engineering

2014

Vol. 64, nr 1

34--38

Purpose: This paper deals with an issue of laser spots overlap and structure evaluation of the material after quenching at different spots-pitches. Design/methodology/approach: The effect of laser spots overlap was investigated on tool steels. The material was quenched by a Nd:YAG laser Laserline LDF 4000 with a maximal power of 4 kV. The laser set was supplemented by an industrial robot. Findings: The laser quenching is the unconventional method of heat treatment. It is characterized by a wide range of benefits, for example, narrow heat-affected area, high process speed or easy automation. However, one of the problems during square parts quenching is laser spots overlap. It leads to temper of quenched layer. It affects negatively the structure and mechanical properties. Research limitations/implications: The main aim of this work is to set the appropriate quenching parameters and optimum spots-pitch for attainment of required heat-treatment quality. Originality/value: This paper present the effect of the laser spots overlap on the structure during square parts quenching.