scholarly journals Enhancement of Medium-Carbon Steel Corrosion and Wear Resistance by Plasma Electrolytic Nitriding and Polishing

Metals ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 1599
Author(s):  
Andrey Apelfeld ◽  
Anatoly Borisov ◽  
Ilya Dyakov ◽  
Sergey Grigoriev ◽  
Boris Krit ◽  
...  
Keyword(s):  
Wear Resistance ◽  
Carbon Steel ◽  
Steel Corrosion ◽  
Corrosion Current ◽  
Bearing Steel ◽  
Medium Carbon Steel ◽  
Surface Phase ◽  
Technological Parameters ◽  
Medium Carbon ◽  
Plasma Electrolytic

The influence of technological parameters of plasma electrolytic nitriding and polishing on the wear resistance and corrosion resistance of medium-carbon steel is considered. The morphology and roughness of the surface, phase composition and microhardness of the modified layer have been investigated. Wear resistance was studied under dry friction conditions with bearing steel as counter-body. It was found that plasma electrolytic polishing removes the loose part of the oxide layer and provides a two-fold decrease in surface roughness compared with untreated steel, and 2.8 times compared with the nitrided one. Combined processing at optimal technological parameters leads to an increase in microhardness up to 1130 HV, an increase in wear resistance by 70 times, and a decrease in the corrosion current density by almost 3 times in comparison with untreated steel.

scholarly journals Cathodic boriding and anodic polishing of medium-carbon steel by plasma electrolysis

2021 ◽  
Vol 2144 (1) ◽  
pp. 012027
Author(s):  
S S Korableva ◽  
I R Palenov ◽  
I M Naumov ◽  
A A Smirnov ◽  
I A Kusmanova ◽  
...  
Keyword(s):  
Wear Resistance ◽  
Carbon Steel ◽  
Sulfate Solution ◽  
Medium Carbon Steel ◽  
Operating Voltage ◽  
Medium Carbon ◽  
Plasma Electrolysis ◽  
Electrolytic Polishing ◽  
Cathodic Plasma ◽  
Plasma Electrolytic

Abstract The possibility of cathodic plasma electrolytic boriding of medium-carbon steel in an aqueous solution of ammonium chloride and boric acid followed by anodic plasma electrolytic polishing in an ammonium sulfate solution on the same equipment with a change in the operating voltage is shown. The morphology and roughness of the surface, microhardness of the modified layer have been investigated. Wear resistance was studied under dry friction conditions. It has been established that cathodic boriding at 850 °C for 5–30 min leads to the hardening of the surface layer up to 1050 HV with an increase in roughness by 1.5–2.5 times and wear resistance by 3.5 times. Subsequent anodic plasma electrolytic polishing of the boriding surface leads to a decrease in roughness with an increase in wear resistance by 2.3 times.

Effect of in situ formation of tungsten semicarbide on the microstructure and mechanical properties of medium carbon steel composites

2021 ◽  
Vol 118 (6) ◽  
pp. 606
Author(s):  
Nandish Girishbhai Soni ◽  
Akash Ganesh Mahajan ◽  
Kaustubh Ramesh Kambale ◽  
Sandeep Prabhakar Butee
Keyword(s):  
Mechanical Properties ◽  
Particle Size ◽  
Wear Resistance ◽  
Carbon Steel ◽  
Sintered Density ◽  
Medium Carbon Steel ◽  
Complete Conversion ◽  
Medium Carbon ◽  
In Situ Formation

Fabrication with the in-situ formation of W2C reinforced medium carbon steel (MCS) MMC’s was attempted using W or WO3 and graphite addition to steel. The P/M route comprising milling, compaction and sintering at 1050 °C and 1120 °C respectively in 90% N2 + 10% H2 atmosphere was adopted. Both SEM and BET studies revealed the particle size to be around 100, 7 and 40 µm for MCS, W and WO3, respectively. A complete conversion of tungsten into tungsten semicarbide (W2C) was noted in XRD for the tungsten additions of ∼6, 9 and 12 wt.% with stoichiometrically balanced C (graphite) addition of 0, 0.2 and 0.4 wt.%. However, WO3 + C addition (balanced as above) revealed the partial conversion of WO3 to W2C. The peaks of Fe3C were observed only for MCS + W + C samples and not for MCS + WO3 + C samples in XRD. In SEM, the WO3 phase appeared porous and partially converted, whereas, W2C phase was dense. Sintered density improved for the addition of W, whereas it monotonically reduced for WO3 addition to MCS + C samples. Higher hardness, compressive strength, and wear resistance was noted for W addition than WO3 to MCS+C samples.

Effect of powdered laser surfacing modes on structure and properties of wear-resistant coating and new medium carbon steel with yield strength 1500 MPa

2019 ◽  
pp. 107-116
Author(s):  
T. V. Knyazyuk ◽  
G. D. Motovilina ◽  
V. V. Bobyr ◽  
V. V. Ryabov
Keyword(s):  
Wear Resistance ◽  
Phase Composition ◽  
Laser Radiation ◽  
Carbon Steel ◽  
Yield Strength ◽  
Heat Input ◽  
Medium Carbon Steel ◽  
Laser Deposition ◽  
Structure And Properties ◽  
Medium Carbon

This paper studies coatings obtained by laser cladding of M2 powder material (Hoganas, Belgium) on a new B1500 medium-carbon steel. The analysis of defects (pores, cracks), microstructure, phase composition, microhardness of the deposited coatings depending on heat input of laser radiation was performed. The results of tests for wear resistance of coating samples, which allow selecting the optimal modes of laser deposition, are presented.

Anode plasma electrolytic nitrohardening of medium carbon steel

2015 ◽  
Vol 269 ◽  
pp. 308-313 ◽  
Author(s):  
S.A. Kusmanov ◽  
A.A. Smirnov ◽  
Yu.V. Kusmanova ◽  
P.N. Belkin
Keyword(s):  
Carbon Steel ◽  
Medium Carbon Steel ◽  
Medium Carbon ◽  
Anode Plasma ◽  
Plasma Electrolytic

MICROSTRUCTURE AND WEAR RESISTANCE OF LASER-TREATED Ni–P–Al2O3 ELECTROLESS DEPOSITION COMPOSITE COATING

2011 ◽  
Vol 10 (01) ◽  
pp. 29-35 ◽  
Author(s):  
FANZHI KONG ◽  
JIANHUA YAO ◽  
XIAODONG HU
Keyword(s):  
Wear Resistance ◽  
Carbon Steel ◽  
Laser Beam ◽  
Electroless Deposition ◽  
Continuous Wave ◽  
Medium Carbon Steel ◽  
Abrasive Resistance ◽  
Medium Carbon ◽  
Equilibrium Phases ◽  
Plating Layer

A uniform Ni–P–Al2O3 electroless plating layer was produced on medium carbon steel and then scanned by high-power continuous wave CO2 laser beam. The entire coating is divided into three regions: laser-strengthened region, transition zone, and heat-affected zone. The strengthened coating shows good performance characterized by uniform components and refined microstructures. The main phase is comprised of Ni3P with some non-equilibrium phases. The reinforced particles, Al2O3 , are homogeneously dispersed in the coating. Its abrasive resistance also increases because of the Al2O3 particles.

Investigation of anodic plasma electrolytic carbonitriding on medium carbon steel

2017 ◽  
Vol 313 ◽  
pp. 288-293 ◽  
Author(s):  
Jie Wu ◽  
Kai Wang ◽  
Longlong Fan ◽  
Lei Dong ◽  
Jianhua Deng ◽  
...  
Keyword(s):  
Carbon Steel ◽  
Medium Carbon Steel ◽  
Medium Carbon ◽  
Plasma Electrolytic
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