Control Factors on the Heat Treatment Process Applied to A537 Steel for Increasing Hardness Using Hardening and Tempering
Abstract
The paper is based on laboratory experiments of heat treatments applied to samples of A537/A537M steel. The work continues other previous works aimed at modifying structures and properties of this steel, including through surface treatments. The experiments were performed using Taguchi methods from Quality Engineering. A number of four factors were selected as influencing the structure after heat treatment: heating temperature for hardening, cooling rate on hardening, time and tempering temperature. A number of nine experiments were performed using an L9 orthogonal matrix. Objective function was changed to maximum hardness after the heat treatment regime. The results show that the tempering temperature has the greatest influence on the final hardness of the A537 steel samples.
Downloads
References
[2]. Cazacu Nelu, Fluidized bed nitrocarburizing applied to astm A537 HSLA steel after pulse laser hardening, Galați, UgalMat2016, 2016.
[3]. Dobrovici, Sorin, Cazacu Nelu, Behavior of A537 Steel Grade in Carburizing in Fluidized Bed with Endothermic Atmosphere, Fascicle IX, Metallurgy and Materials Science, Galați University Press, vol. no. 1, ISSN 1453-083X, 2009.
[4]. Cănănău Nicolae, Cazacu Nelu, Brenoaie Ionel, Research Concerning the Behavior of the Thick Plates A537 to the tempering Treatments, Fascicle IX, Metallurgy and Materials Science, Galați, s.n., p. 111-114, ISSN 1453-083X, 1996.
[5]. Cănănău Nicolae, Cazacu Nelu, Brenoaie Ionel, Research Concerning the Quench heat Treatment of the Thick Plates by a A537 Steel, Fascicle IX, Metallurgy and Materials Science, p. 107-110, ISSN 1453-083X, 1996.
[6]. Taguchi G., Introduction to quality engineering into products and processes, s.l.: Asian productivity organization, 1986.
[7]. Phadke M. S., Quality engineering using robust design. Englewood Cliffs, New Jersey: Prentice Hal, 1989.
[8]. Logothetis N., Wynn P. H., Quality through design. Experimental design, Off-line Quality control and Taguchi’s Contributions, Oxford: Claderon Press, 1994.
