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

• Autorzy: Kirschner V. , Švec M. , Bruthansová R. , Dvořák L.
• Języki publikacji: EN

Abstrakty

EN

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.

Słowa kluczowe

EN

laser quenching; laser spots overlap; microstructure

PL

hartowanie laserowe; mikrostruktura

• Wydawca: International OCSCO World Press
• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2014
• Tom: Vol. 64, nr 1
• Strony: 34--38
• Opis fizyczny: Bibliogr. 8 poz., rys., tab.

Twórcy

autor

Kirschner V.

• VÚTS a.s., Laser Application Center, Svárovská 619, Liberec, Czech Republic

autor

Švec M.

• VÚTS a.s., Laser Application Center, Svárovská 619, Liberec, Czech Republic

autor

Bruthansová R.

• VÚTS a.s., Laser Application Center, Svárovská 619, Liberec, Czech Republic

autor

Dvořák L.

• VÚTS a.s., Laser Application Center, Svárovská 619, Liberec, Czech Republic

Bibliografia

• [1] P. Veles, Mechanické vlastnosti a skúšanie kovov, Alfa Publishing, Bratislava, 1989.
• [2] Y.H.. Guan, T.L. Chen, H.G. Wang, J.T. Zhang, The Prediction of the Mechanical Properties of Metal during laser quenching, Journal of Materials Processing Technology 63/1-3 (1997) 614-617.
• [3] Z. Chen, G. Zhou, Z. Chen, Microstructure and hardness investigation of 17-4PH stainless steel by laser quenching, Materials Science and Engineering A 534/1 (2012) 536-541.
• [4] J.-H. Lee, J.-H. Jang, B.-D. Joo, Y.-M. Son, Y.-H. Moon, Laser surface hardening of AISI H13 tool steel, Transactions of Nonferrous Metals Society of China 19/4 (2009) 917-920.
• [5] S. Martínez, A. Lamikiz, I. Tabernero, E. Ukar, Laser hardening process with 2D scanning optics, Physics Procedia 39 (2012) 309-317.
• [6] L. Qingbin, L. Hong, Experimental study of the laser quenching of 40CrNiMoA steel, Journal of Materials Processing Technology 88 (1999) 77-82.
• [7] Ch. Yao, B. Xu, J. Huang, P. Zhang, Y. Wu, Study of the softening in overlapping zone by laser-overlapping scanning surface hardening for carbon and alloyed steel, Optics and Lasers in Engineering 48/1 (2010) 20-26.
• [8] J. Jiang, L. Xue, S. Wang, Discrete laser spot transformation hardening of AISI 01 tool steel using pulsed Nd:YAG laser, Surface and Coatings Technology 205/21-22 (2011) 5156-5164.