Microhardness and tribological wear of the steels remelted with an electric arc
Journal Title: Archiwum Odlewnictwa - Year 2009, Vol 9, Issue 2
Abstract
This study presents results of a research on the surface strengthening of the C15, C45 and C90U steels by application of concentrated heat stream with the GTAW methodology. Utilizing the GTAW methodology remelting of the surface layer of the sampled steels was performed by a welding head moving at a speed ranging from 200 mm/min to 800 mm/min and the current intensity of the electric arc ranging from 50A to 300A. Measurements of hardness, frictional coefficient and intensity of tribological wear were performed in the remelted surface layer. Correlation between the intensity of the electric arc versus microhardness and tribological wear resistance under conditions of dry-friction was established. Following the treatment an increase in hardness as well as increase in the tribological wear resistance could be observed in steel samples. The best results were achieved during remelting of the surface layer with electric arc at 100A intensity and the speed of the welding head in relation to treated sample of 200 mm/min.
Authors and Affiliations
S. Adamiak
Keywords
Related Articles
- EP ID EP71682
- DOI -
- Views 120
- Downloads 0
Tribological resistance of high speed steel HS 6-5-2 remelted with electric arc
The intensity of tribological wear of the high speed steel HS 6-5-2 remelted with the GTAW method has been compared to the heat treatment steel in a conventional way. Moreover, the types of the wear appeared during the f...
Gas flow through a multilayer ceramic mould in lost wax foundry process
The paper deals with the issues of permeability testing of ceramic moulds used in lost wax foundry process. The main issue in the testing is to provide proper specimens of ceramic moulds (CM). The moulds have to be repea...
A method for determination of complete mechanical characteristics of heterogeneous-structured materials
The article outlines the possibilities to evaluate by a modified low-cycle fatigue test the quality of materials characterised by different structures and the resulting mechanical properties. The method was described by...
Friction wear cast iron casting surface hardened by concentrated source of heat
In this study surface fusion by the GTAW (in argon atmosphere) surfacing process on plate of cast iron with electric arc advance speeds from 200 to 800 mm/min and current range I=300A were performed. The geometry, micros...
Predicting ADI mechanical properties
Ductile cast iron was quench-hardened with the isothermal transformation according to two alternatives. The first treatment alternative consisted in the austenitizing process at temperature t = 830, 860 i 900°C and anne...