Investigation on structural and tribological properties of borided gear steel after phase homogenization

Arslan, Mustafa; Ok, Alaaddin Cem; Sireli, Guldem Kartal; Timur, Servet

doi:10.1016/j.surfcoat.2021.127967

Cited by 13 publications

(9 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The near-surface porosity of borided steel is a well-known phenomenon reported by other researchers [ 30 , 31 , 32 ]. Porosity is commonly explained by the Kirkendall effect [ 33 , 34 ]. Below this zone, the borided layer is compact, although small objects with irregular shapes can be observed.…”

Section: Resultsmentioning

confidence: 99%

Effect of Prior Boriding on Microstructure and Mechanical Properties of Nanobainitic X37CrMoV5-1 Hot-Work Tool Steel

et al. 2023

View full text Add to dashboard Cite

The influence of prior pack boriding on the microstructure and properties of nanobainitised X37CrMoV5-1 hot-work tool steel was investigated in the present work. Pack boriding was conducted at 950 °C for 4 h. Nanobainitising consisted of two-step isothermal quenching at 320 °C for 1 h, followed by annealing at 260 °C for 18 h. A combination of boriding with nanobainitising constituted a new hybrid treatment. The obtained material exhibited a hard borided layer (up to 1822 ± 226 HV0.05) and a strong (rupture strength 1233 ± 41 MPa) nanobainitic core. However, the presence of a borided layer decreased mechanical properties under tensile and impact load conditions (total elongation decreased by 95% and impact toughness by 92%). Compared with borided and conventionally quenched and tempered steel, the hybrid–treated material retained higher plasticity (total elongation higher by 80%) and higher impact toughness (higher by 21%). It was found that the boriding led to the redistribution of carbon and silicon atoms between the borided layer and substrate, which could influence bainitic transformation in the transition zone. Furthermore, the thermal cycle in the boriding process also influenced the phase transformations during subsequent nanobainitising.

show abstract

Section: Resultsmentioning

confidence: 99%

Effect of Prior Boriding on Microstructure and Mechanical Properties of Nanobainitic X37CrMoV5-1 Hot-Work Tool Steel

et al. 2023

View full text Add to dashboard Cite

show abstract

“…These wear mechanisms are indicative of the soft nature of the bare SLMed 8620. On the other hand, the presence of a rough worn surface on the borided 8620 demonstrated an adhesive wear mode [1]. In adhesive wear, small areas of two sliding surfaces were welded and subsequently ruptured at the welding points.…”

Section: Potentiodynamic Polarizationmentioning

confidence: 99%

“…Wear and corrosion are the two major causes of material degradation and failure in many industrial applications. For example, automotive components, such as gear, camshaft, crankshaft, piston pin, etc., suffer from wear-induced material loss due to cyclic nature of their loading [1][2][3][4]. In addition, intricate parts in the oil and gas industries, such as valve seat, pump impeller, and plunger of sucker rod pumps, are susceptible to wear and corrosion due to the presence of CO 2 , H 2 S, and other corrosive media [5,6].…”

Section: Introductionmentioning

confidence: 99%

Improving the Mechanical and Electrochemical Performance of Additively Manufactured 8620 Low Alloy Steel via Boriding

Sabuz,

Noor-A-Alam,

Haider

et al. 2023

CMD

View full text Add to dashboard Cite

In this study, mechanical and electrochemical performance of borided additively manufactured (AM) and wrought 8620 low alloy steel were investigated and compared to their bare counterparts. The microstructure of borided 8620 exhibited the presence of FeB and Fe2B phases with a saw tooth morphology. Both AM and wrought samples with boride layers showed a similar performance in hardness, wear, potentiodynamic polarization (PD), electrochemical impedance spectroscopy (EIS), and linear polarization resistance (LPR) experiments. However, borided steels exhibited about an 8-fold increase in Vickers hardness and about a 6-fold enhancement in wear resistance compared to bare ones. Electrochemical experiments of borided specimens (both AM and wrought) in 0.1 M Na2S2O3 + 1 M NH4Cl solution revealed a 3–6-fold lower corrosion current density, about a 6-fold higher charge transfer resistance, and about a 6-fold lower double-layer capacitance, demonstrating an improved corrosion resistance compared to their bare counterparts. Post-corrosion surface analysis revealed the presence of thick sulfide and oxide layers on the bare steels, whereas dispersed corrosion particles were observed on the borided samples. The enhanced wear and electrochemical performance of the borided steels were attributed to the hard FeB/Fe2B layers and the reduced amount of adsorbed sulfur on their surface.

show abstract

“…Other studies considered optimising the boriding environment (container design, boriding medium) [9][10][11]. Furthermore, methods in which auxiliary processes precede [12][13][14] or follow boriding [15][16][17] were studied. These studies are essential because they help increase the treatment's benefits.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Hybrid Treatment Combining Boriding and Nanobainitising on the Tribological and Mechanical Properties of 66SiMnCrMo6-6-4 Bearing Steel

et al. 2023

View full text Add to dashboard Cite

The effect of a new hybrid heat treatment consisting of pack-boriding and nanobainitising on the microstructure and properties of EN 66SiMnCrMo6-6-4 bearing steel was investigated. The hybrid treatment produces a new high-strength (ca. 1480 MPa) material with a hard boride (ca. 2000 HV0.05) surface layer and a relatively ductile nanobainitic core. The formation of the boride layer significantly improves wear resistance. The boride layer, which is hard but susceptible to cracking, reduces the mechanical properties under tensile and impact loads. However, the borided and nanobainitised steel exhibits much higher tensile strength and ductility and slightly better impact toughness than steel after post-boriding quenching and tempering.

show abstract

Investigation on structural and tribological properties of borided gear steel after phase homogenization

Cited by 13 publications

References 29 publications

Effect of Prior Boriding on Microstructure and Mechanical Properties of Nanobainitic X37CrMoV5-1 Hot-Work Tool Steel

Effect of Prior Boriding on Microstructure and Mechanical Properties of Nanobainitic X37CrMoV5-1 Hot-Work Tool Steel

Improving the Mechanical and Electrochemical Performance of Additively Manufactured 8620 Low Alloy Steel via Boriding

The Effect of Hybrid Treatment Combining Boriding and Nanobainitising on the Tribological and Mechanical Properties of 66SiMnCrMo6-6-4 Bearing Steel

Contact Info

Product

Resources

About