An Analysis of the Microstructure, Macrostructure and Microhardness of Nicr-Ir Joints Produced by Laser Welding with and without Preheat

Archives of Metallurgy and Materials

S. Różowicz¹  Sz. Tofil²  A. Zrak³ 

[1] KIELCE UNIVERSITY OF TECHNOLOGY, DEPARTMENT OF INDUSTRIAL ELECTRICAL ENGINEERING AND AUTOMATIC CONTROL, DIVISION OF POWER ELECTRONICS AND ELECTRICAL MACHINES AND DRIVES, FACULTY OF ELECTRICAL ENGINEERING, AUTOMATIC CONTROL AND COMPUTER SCIENCE, 7th TYSI?CLECIA P.P. AV. 25-314 KIELCE, POLAND;KIELCE UNIVERSITY OF TECHNOLOGY, LASER PROCESSING RESEARCH CENTRE, DIVISION OF SURFACE ENGINEERING, FACULTY OF MECHATRONICS AND MECHANICAL ENGINEERING, 7th TYSI?CLECIA P.P. AV. 25-314 KIELCE, POLAND;UNIVERSITY OF ŽILINA, FACULTY OF MECHANICAL ENGINEERING, DEPARTMENT OF TECHNOLOGICAL ENGINEERING, 8215/1 UNIVERZITNÁ STR., 010 26 ŽILINA, SLOVAKIA

关键词: Keywords: microstructure;    microhardness;    microjoint;    laser welding;    refractory metals;   

DOI  :  10.1515/amm-2016-0193

学科分类：金属与冶金

来源: Akademia Gorniczo-Hutnicza im. Stanislawa Staszica / University of Mining and Metallurgy

【 摘 要 】

This paper discusses some of the basic problems involved in laser welding of dissimilar materials with significant differences in melting points. It focuses on the micro and macrostructure of laser welded NiCr-Ir microjoints used in central spark plug electrodes. The joints were produced by welding with and without preheat using an Nd,YAG laser. The structure and composition of the welded joints were analyzed by means of a light microscope (LM) and a scanning electron microscope (SEM) equipped with an energy dispersive X-ray (EDX) spectrometer. The microhardness of the weld area was also studied.

【 授权许可】

Unknown