Plasma Nitriding of Deep Narrow Cavities

2011 ◽  
Vol 465 ◽  
pp. 267-270 ◽  
Author(s):  
Z. Pokorný ◽  
Vojtěch Hruby
Keyword(s):  
Corrosion Resistance ◽  
Fatigue Strength ◽  
Penetration Depth ◽  
Plasma Nitriding ◽  
Surface Hardness ◽  
Nitrided Steel ◽  
New Information ◽  
Wear And Corrosion ◽  
Wear And Corrosion Resistance

Technology of plasma nitriding is widely used to increase the surface hardness, fatigue strength, wear and corrosion resistance of steels [1, 2]. In this study, the properties of plasma nitrided steel of various diameters at various pressures are investigated. There was obtained new information about possibilities of plasma nitriding technology and its applications to the cavities with diameters of 6, 8 and 10 mm and a penetration depth of 400 mm.

scholarly journals Use of plasma nitriding to improve the wear and corrosion resistance of 18Ni-300 maraging steel manufactured by selective laser melting

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
M. Godec ◽  
B. Podgornik ◽  
A. Kocijan ◽  
Č. Donik ◽  
D. A. Skobir Balantič
Keyword(s):  
Corrosion Resistance ◽  
Maraging Steel ◽  
Selective Laser Melting ◽  
Plasma Nitriding ◽  
Nitrided Layer ◽  
Solution Treatment ◽  
Thermochemical Treatment ◽  
Laser Melting ◽  
Wear And Corrosion ◽  
Wear And Corrosion Resistance

Abstract18Ni-300 maraging steel manufactured by selective laser melting was plasma nitrided to improve its wear and corrosion resistance. The effects of a prior solution treatment, aging and the combination of both on the microstructure and the properties after nitriding were investigated. The results were compared with conventionally produced 18Ni-300 counterparts subjected to the same heat- and thermo-chemical treatments. The plasma nitriding was performed under the same conditions (temperature of 520 °C and time of 6 h) as the aging in order to investigate whether the nitriding and the aging could be carried out simultaneously in a single step. The aim of this work was to provide a better understanding of the morphology and chemical composition of the nitrided layer in the additive-manufactured maraging steel as a function of the prior heat treatments and to compare the wear and corrosion resistance with those of conventional maraging steel. The results show that nitriding without any prior aging leads to cracks in the compound layer, while nitriding of the prior-heat-treated additive-manufactured maraging steel leads to benefits from the thermochemical treatment in terms of wear and corrosion resistance. Some explanations for the origins of the cracks and pores in the nitride layers are provided.

Surface Modification of SS2205 Duplex Stainless Steel by Plasma Nitriding at Anodic Potential

2014 ◽  
Vol 881-883 ◽  
pp. 1263-1267 ◽  
Author(s):  
Shuo Zhao ◽  
Liang Wang ◽  
Jiu Jun Xu ◽  
Y. Shan
Keyword(s):  
Stainless Steel ◽  
Wear Resistance ◽  
Corrosion Resistance ◽  
Low Temperature ◽  
Duplex Stainless Steel ◽  
Plasma Nitriding ◽  
Nitrided Layer ◽  
Surface Hardness ◽  
Anodic Potential ◽  
Wear And Corrosion

The duplex stainless steel has better pitting corrosion resistance but lacks of hardness and wear resistance. Therefore, the low temperature nitriding treatment can be used to increase its hardness and wear resistance or to gain more perfect corrosion resistance. The plasma nitriding of SS2205 stainless steel was carried out at temperatures from 693k to 753k for 4 hours at anodic potential. The nitrided samples were analyzed by optical microscopy, X-ray diffraction, SEM-EDX analysis, microhardness testing, wear and corrosion evaluation. The XRD analysis of all treated samples showed that the nitrogen-expanded austenite phase was formed. Both α and γ phase of the substrate were transformed into γNduring plasma nitriding. Observing the nitrided layers formed on α and γ phase, the ones situated in the austenite were thinner than the ones in the ferrite. This phenomenon was more evident at low temperature, which confirmed that the nitrogen has a higher diffusion rate in the ferrite during plasma nitriding treatment. The surface hardness of nitrided layer was increased with the nitriding temperature. The highest hardness value obtained in this experiment was about 1300 HV0.05which was 4 times as the original sample (380 HV0.05). Furthermore, through the wear and corrosion property tests, it was shown that anodic plasma nitriding improved the wear resistance and corrosion resistance of the duplex stainless steel.

Surface Modification of Pure Titanium by Nitrogen Ion Implantation at Different Beam Energy and Dose

2011 ◽  
Vol 462-463 ◽  
pp. 750-755 ◽  
Author(s):  
Nurdin Ali ◽  
Haryanti Samekto ◽  
Mohd Imran Ghazali ◽  
M. Ridha
Keyword(s):  
Corrosion Resistance ◽  
Pure Titanium ◽  
Surface Hardness ◽  
Surface Characteristics ◽  
Grazing Incidence ◽  
Near Surface ◽  
Wear And Corrosion ◽  
Nitrogen Ions ◽  
Nitrogen Ion ◽  
Wear And Corrosion Resistance

The implantation of nitrogen ion is one of the important techniques for modifying the surface characteristics to improve wear and corrosion resistance of commercially pure (cp) Titanium. Although nitrogen ions implanted titanium in various dose demonstrated significant changes of the wear and corrosion resistance, the variable energy implanted is still not yet fully studied. Nitrogen ions were implanted in cp Titanium surface with varies of both dose of 0.5; 1.0 and 2.0 x1017 ions cm-2 and energy of 80, 100 and 115 keV. The nitrogen ion implanted cp Titanium demonstrated an increase in the surface hardness and improvement in corrosion behavior. The maximum surface hardness was delivered by the specimens implanted with the dose of 2.0x1017 ions cm-2 at energy of 80 keV. Grazing incidence x-ray diffraction studies indicated that TiN phase was formed on near surface substrate. Electrochemical tests in 3.5%-wt NaCl solution depicted significant improvements in corrosion resistance for specimens implanted with dose of 0.5x1017 and 1.0x1017 ions cm-2 at energy of 80 keV, dose of 1.0x1017 and 2.0x1017 ions cm-2 at energy of 100 keV. The dose of 2.0x1017 ions cm-2 and energy of 100 were the best implantation parameter in this study.

Use of Plasma Nitriding to Improve the Wear and Corrosion Resistance of 18Ni-300 Maraging Steel Manufactured by Selective Laser Melting

2020 ◽  
Author(s):  
Matjaž Godec ◽  
Bojan Podgornik ◽  
Aleksandra Kocijan ◽  
Črtomir Donik ◽  
Danijela Skobir Balantič
Keyword(s):  
Corrosion Resistance ◽  
Maraging Steel ◽  
Selective Laser Melting ◽  
Plasma Nitriding ◽  
Nitrided Layer ◽  
Solution Treatment ◽  
Thermochemical Treatment ◽  
Laser Melting ◽  
Wear And Corrosion ◽  
Wear And Corrosion Resistance

Abstract 18Ni-300 maraging steel manufactured by selective laser melting was plasma nitrided to improve its wear and corrosion resistance. The effects of a prior solution treatment, aging and the combination of both on the microstructure and the properties after nitriding were investigated. The results were compared with conventionally produced 18Ni-300 counterparts subjected to the same heat- and thermo-chemical treatments. The plasma nitriding was performed under the same conditions (temperature of 520 °C and time of 6 hours) as the aging in order to investigate whether the nitriding and the aging could be carried out simultaneously in a single step. The aim of this work was to provide a better understanding of the morphology and chemical composition of the nitrided layer in the additive-manufactured maraging steel as a function of the prior heat treatments and to compare the wear and corrosion resistance with those of conventional maraging steel. The results show that nitriding without any prior aging leads to cracks in the compound layer, while nitriding of the prior-heat-treated additive-manufactured maraging steel leads to benefits from the thermochemical treatment in terms of wear and corrosion resistance. Some explanations for the origins of the cracks and pores in the nitride layers are provided.

THERMAL OXIDATION OF Ti6Al4V ALLOY WITH ENHANCED WEAR AND CORROSION RESISTANCE FOR OIL AND GAS APPLICATION: EFFECT OF TEMPERATURE

2015 ◽  
Vol 22 (03) ◽  
pp. 1550033 ◽  
Author(s):  
NAIMING LIN ◽  
PENG ZHOU ◽  
YATING WANG ◽  
JIAOJUAN ZOU ◽  
YONG MA ◽  
...  
Keyword(s):  
Wear Resistance ◽  
Corrosion Resistance ◽  
Thermal Oxidation ◽  
Oil And Gas ◽  
Surface Hardness ◽  
Effect Of Temperature ◽  
Wear And Corrosion ◽  
Different Temperatures ◽  
Superior Corrosion Resistance ◽  
Wear And Corrosion Resistance

Thermal oxidation (TO) treatments were performed at 873 K, 898 K, 923 K, 948 K, 973 K, 998 K and 1023 K for 10 h in air to improve the wear and corrosion resistance of Ti 6 Al 4 V alloy. The effect of TO temperature on microstructural characterizations and surface properties of the obtained TO layers were investigated. The results showed that TO layers with various thickness values were formed on Ti 6 Al 4 V alloy under different temperatures. The thickness of the TO layers increased with the increasing of TO temperature. TO layer that was obtained at 973 K suggested the highest surface hardness and the best wear resistance. TO layer that was realized at 948 K exhibited superior corrosion resistance to other TO layers. TO treatment could be considered as an effective method for preventing wear and corrosion of Ti 6 Al 4 V alloy.

Corrosion Resistance of TiN Coating on 304 Steel

2011 ◽  
Vol 121-126 ◽  
pp. 3779-3783
Author(s):  
Shiuh Chuan Her ◽  
Cheng Lin Wu
Keyword(s):  
Corrosion Resistance ◽  
Magnetron Sputtering ◽  
Substrate Temperature ◽  
Steel Substrate ◽  
High Surface ◽  
Surface Hardness ◽  
Deposition Parameters ◽  
Wear And Corrosion ◽  
Tin Thin Films ◽  
Wear And Corrosion Resistance

Titanium Nitride (TiN) coatings with high surface hardness, good wear and corrosion resistance, low friction coefficient have been widely used in many applications such as a hard coating of cutting tool, a diffusion barrier layer. In this work, TiN thin films were deposited by D.C. magnetron sputtering process on SUS 304 steel substrate. Magnetron sputtering provides a wide variation of the deposition parameters which affect the morphology of the films and, consequently, their properties. The effects of substrate temperature on the microstructure and corrosion resistance of TiN films were studied in details using atomic force microscopy and potentiostat test. Considerable improvements in the surface roughness and corrosion resistance were observed when the substrate temperature was increased from C to C.

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