Influence of prior cold deformation on microstructure evolution of AISI D2 tool steel after hardening heat treatment

Nanesa, Hadi Ghasemi; Boulgakoff, Julien; Jahazi, Mohammad

doi:10.1016/j.jmapro.2016.02.002

Cited by 23 publications

(12 citation statements)

References 21 publications

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“…The worn surfaces of the borided samples showed minor deformation and smearing effects at high boriding temperature, with minimum wear depth and width at a boriding temperature of 1150 • C. The boriding process used in the present study substantially increased the wear resistance of Ti due to high surface hardness. (5) The boriding treatment reduced the fricative value. As the boriding temperature increased, the fricative value of the samples decreased initially and then increased, with a minimum value of 88.9 dB at 1050 • C.…”

Section: Discussionmentioning

confidence: 99%

“…However, the resulting protective film is relatively thin, and when the surface film is broken, the corrosion resistance will instantly decrease [3]. Recently, effective surface modification techniques, such as deposition and diffusion, have been adopted [4,5]. The deposition method mainly included physical vapor deposition (PVD) and chemical vapor deposition (CVD).…”

Section: Introductionmentioning

confidence: 99%

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Improvement of Mechanical, Tribological, and Fricative Reduction Properties of Pure Titanium by Boriding

Chen

Koyama

2021

Applied Sciences

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Surface boriding of pure titanium was performed using dissolved salt impregnation to modify the surface hardness and improve wear performance. The effect of boriding temperature (950–1150 °C) on the microstructure, composition, and room-temperature tribological properties of the borided samples was investigated by X-ray diffraction, scanning electron microscopy, and ball-on-disc tribometry, respectively. Gibbs free energy was also calculated to evaluate the compounds generated during the boriding at different temperatures. After a detailed analysis of the crystal structures and the growth morphologies of TiB, the diffusion mechanisms for B atoms in TiB and TiB2 were discussed in the present report. The boriding temperature had a large effect on the microstructure, mechanical properties, and room-temperature tribological behavior of the borided samples, attributed to the changes in the composition and the increased hardened layer under elevated boriding temperature. The modeling of layer growth kinetics was also discussed in this paper. The actual value of hardened layer thickness was compared to the calculated value, and the difference was analyzed. The fricative value of the borided samples showed a minimum value of 88.9 dB for a boriding temperature of 1050 °C. The depth and width of the wear tracks decreased gradually with increasing boriding temperature. The worn surface of the samples borided at higher temperatures showed very good wear resistance. A boriding condition of 1050 °C was considered optimal, as it provided sufficiently high surface hardness and a low fricative value to reduce vibrations during practical use.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Improvement of Mechanical, Tribological, and Fricative Reduction Properties of Pure Titanium by Boriding

Chen

Koyama

2021

Applied Sciences

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“…(1) The proportion of low grain boundary increases from 18.1% to 66.3% due to the applied CRR. The amount of brass R{110} < 110 > texture decreases with the increase of the < 111 > //ND texture for the specimens subjected CRR4.…”

Section: Discussionmentioning

confidence: 99%

Microstructure Evolution and Tempering Transformation Kinetics in a Secondary Hardened M50 Steel Subjected to Cold Ring Rolling

et al. 2021

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“…The αβ transformation temperature of steels (A C1 ) decreases after their plastic deformation, which is explained by the possible relaxation of the slander energy particle in the process of phase transformation [12]. As a result, the equality of the thermodynamic potentials of the phases, which determine the temperature of phase equilibrium, is achieved at lower temperatures [13]. Improvement of operational characteristics during hardening by surface plastic deformation (SPD) is associated with the formation of a dislocation structure on the surface of the hardened zone, which prevents the occurrence and development of fatigue cracks [14].…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Increasing wear and corrosion resistance of steel products by combined laser thermomechanical treatment

Dаnylеikо

Dzhemelinskyi

Lesyk

2021

EEJET

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A technique is presented for hardening metal products, in particular, the main tools (hammers) and cases of core drilling bits made of steel 30HGSA, using thermomechanical surface treatment according to a separate scheme. The method of combined laser thermomechanical hardening used in the study consists in the use of shot peening followed by laser heat treatment. Its use makes it possible to increase the operational properties of steel products, in particular, their wear and corrosion resistance. Based on the results of theoretical and experimental studies, the paper substantiates the features of dynamic surface plastic deformation for the analysis of impact during shot peening. The advantages of using laser hardening without surface melting are presented. Experimental research methods are proposed for determining the structural-phase composition, structure of the surface layer, hardness and microhardness of the hardened zones of steel 30HGSA. The range of rational modes of impact shot peening and thermal laser treatment has been determined. A device for testing samples for wear resistance has been developed. Methods of testing for wear and corrosion resistance of the surface of samples are proposed for assessing the tribological properties and contact interaction of materials under quasi-static and dynamic loading conditions. It is concluded that rational technological modes of hardening tools made of steel 30HGSA using combined laser thermomechanical treatment allow increasing the depth of the hardened layer by ~1.5 times compared to laser heat treatment. In addition, they provide the microhardness of the surface layer of ~5400 MPa, which is ~2.5 times higher than the microhardness of the base material

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Influence of prior cold deformation on microstructure evolution of AISI D2 tool steel after hardening heat treatment

Cited by 23 publications

References 21 publications

Improvement of Mechanical, Tribological, and Fricative Reduction Properties of Pure Titanium by Boriding

Improvement of Mechanical, Tribological, and Fricative Reduction Properties of Pure Titanium by Boriding

Microstructure Evolution and Tempering Transformation Kinetics in a Secondary Hardened M50 Steel Subjected to Cold Ring Rolling

Increasing wear and corrosion resistance of steel products by combined laser thermomechanical treatment

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