Microstructural and Abrasive Wear Properties of Tungsten Inert Gas Deposited FeCrC and WC Coatings on AISI 4340 Steel

2007 ◽  
Vol 44 (6) ◽  
pp. 273-289
Author(s):  
Soner Buytoz ◽  
M. Mustafa Yildirim
Keyword(s):  
Abrasive Wear ◽  
Inert Gas ◽  
Wear Properties ◽  
Aisi 4340 Steel ◽  
4340 Steel ◽  
Aisi 4340

Wear properties of WC–Co and WC–CoCr coatings applied by HVOF technique on different steel substrates

2020 ◽  
Vol 62 (12) ◽  
pp. 1235-1242
Author(s):  
Hatice Varol Ozkavak ◽  
Serife Sahin ◽  
Mehmet Fahri Sarac ◽  
Zehra Alkan
Keyword(s):  
Surface Roughness ◽  
Wear Resistance ◽  
Friction Coefficient ◽  
Steel Substrate ◽  
Wear Properties ◽  
Sem Images ◽  
Steel Alloys ◽  
Aisi 4340 Steel ◽  
4340 Steel ◽  
Aisi 4340

Abstract Low alloy and stainless steel are the most used types of iron-based materials world wide. Their use against in machine element work, reclamation, corrosion and wear resistance are still challenging. To overcome this problem, many steel alloys are coated with cermet coatings to protect the parts from wear and corrosion. In the present study, WC-Co and WC-CoCr coatings were applied by means of a high velocity oxy-fuel (HVOF) technique on AISI 304, AISI 1040, and AISI 4340 steel alloys used as substrates. The aim was to investigate surface properties and wear resistance of the coatings and to determine their relationship with the type of coating and substrate. In accordance with this purpose, hardness and thickness of the coatings were measured, sliding wear tests were performed, scanning electron microscope (SEM) images and X-ray diffractions (XRD) were taken, surface roughness and friction coefficients were determined. The results showed that the WC-CoCr coatings had higher hardness and lower thickness than the WC-Co coatings. Maximum hardness was obtained in the WC-CoCr coating applied to AISI 4340 steel, which was also the hardest alloy among those studied. After wear resistance tests, it was revealed that the wear resistance of the WC-CoCr coatings was better than that of the WC-Co coatings for each steel substrate. During the coating, the new phases resulting from the decomposition of the WC phase in the WC-CoCr coatings contributed more to wear resistance than those of the WC-Co coatings. A lower friction coefficient and lower surface roughness of the WC-CoCr coatings during wear were obtained, resulting in higher wear resistance. A WC-CoCr coating on AISI 4340 alloy which has the highest hardness, lowest surface roughness and lowest friction coefficient resulted in the highest wear resistance among all types studied.

scholarly journals Effect of Temperature on the Wear Properties of Alloy Steel under Jatropha Curcas Biodiesel

2015 ◽  
Vol 1115 ◽  
pp. 203-206
Author(s):  
N.A. Shaufe ◽  
Md Abdul Maleque ◽  
A.A. Saleh ◽  
P. Paruka
Keyword(s):  
Alloy Steel ◽  
Jatropha Curcas ◽  
Effect Of Temperature ◽  
Wear Behaviour ◽  
Wear Volume ◽  
Wear Properties ◽  
Aisi 4340 Steel ◽  
4340 Steel ◽  
Jatropha Curcas Biodiesel ◽  
Aisi 4340

This paper presents the effect of Jatropha curcas biodiesel on the wear properties of mild steel, which was coated by preplacement of TiC particulate and melting it using a conventional TIG torch arc heat source. The aim of the study is to investigate the wear behaviour of surface modified AISI 4340 steel and the uncoated AISI 4340 steel which were performed using CSM tribometer at four different temperatures viz., 100 °C, 120 °C, 140 °C, and 160 °C, with the presence of jatropha biodiesel. At the end of the tests, wear characteristics was investigated by weight loss measurements and changes of the exposed metal surface. Surface morphology was examined by scanning electron microscope and surface profilometry. EDX analysis was performed on the samples’ surface. Results showed that wear of alloy steel increases with increasing temperature. TiC coated alloy steel showed improved wear resistance as this alloy steel demonstrated lower wear volume loss as compared to the uncoated steel in presence of jatropha biodiesel at higher temperature.

Influence of Minimum Quantity Lubrication on Grinding Performance of Annealed AISI 4340 Steel

2017 ◽  
Vol 31 (2) ◽  
pp. 17 ◽  
Author(s):  
Sirsendu Mahata ◽  
Ankesh Samanta ◽  
Joydip Roy ◽  
Bijoy Mandal ◽  
Santanu Das
Keyword(s):  
Minimum Quantity Lubrication ◽  
Aisi 4340 Steel ◽  
Minimum Quantity ◽  
Grinding Performance ◽  
4340 Steel ◽  
Aisi 4340

Environmental Effects of Sulfur and Sulfur Compounds on the Resistance to Stress Corrosion Cracking of AISI 4340 Steel in Aqueous Chloride Solutions

CORROSION ◽  
1969 ◽  
Vol 25 (8) ◽  
pp. 342-344 ◽  
Author(s):  
A. TIRMAN ◽  
E. G. HANEY ◽  
PAUL FUGASSI
Keyword(s):  
Sodium Chloride ◽  
Stress Corrosion ◽  
Stress Corrosion Cracking ◽  
Corrosion Cracking ◽  
Prior Treatment ◽  
Aisi 4340 Steel ◽  
Aqueous Sodium ◽  
4340 Steel ◽  
Resistance To Stress ◽  
Aisi 4340

Abstract The resistance to stress corrosion cracking of AISI 4340 steel foil in 0.6M aqueous sodium chloride, acidified to pH 1.5 with hydrochloric acid, is greatly decreased by prior treatment of the specimens for short periods of time with aqueous and nonaqueous solutions of sulfur, organic and inorganic sulfides, sulfur dioxides, and the inorganic salts of sulfurousand sulfuric acids. It is suggested that this prior treatment produces sulfided areas which are inhibitors of the combination of atomic hydrogen into molecular hydrogen. The decreased resistance to stress corrosion cracking is thus attributed to hydrogen embrittlement. If the stress corrosion cracking test is made in 0.6M aqueous sodium chloride, adjusted to an initial pH of 8, the effect of a prior sulfiding treatment is small. The formation of such sulfided areas in practice result from the exposure of 4340 steels to industrial atmospheres which may contain hydrogen sulfide, sulfur dioxide, and elemental sulfur.

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