Effect of the structure and phase composition on the wear resistance of the case-hardened layer of steel 20Kh2N4A

1962 ◽  
Vol 4 (5-6) ◽  
pp. 238-241
Author(s):  
V. S. Sagaradze
Keyword(s):  
Wear Resistance ◽  
Phase Composition ◽  
Hardened Layer ◽  
Steel 20Kh2n4a

Wear Behavior and Structural Characterization of a Nitrogen Implanted Ti6Al4V Alloy at Different Temperatures

1983 ◽  
Vol 27 ◽  
Author(s):  
R. Martinella ◽  
G. Chevallard ◽  
C. Tosello
Keyword(s):  
Wear Resistance ◽  
Structural Characterization ◽  
Wear Behavior ◽  
Hardened Layer ◽  
Structural Modifications ◽  
Theory Comparison ◽  
Different Temperatures ◽  
Nitrogen Ions ◽  
Wear Tests

ABSTRACTMechanically polished Ti6Al4V samples were implanted with 100 key nitrogen ions to a fluence of 5.1017 ions/cm2 at two different bulk tenneratures: 370°C and 470°C. Wear tests were carried out with a reciprocating slidina tribotester. Structural modifications and wear morphologies were studied by TEM and SEM. 370°C implanted sample showed the same wear behavior as unimplanted ones, while 470°C implanted sample showed better wear resistance because of a TiN hardened layer. Correlations- between microstructural modifications, wear behavior and mechanisms are reported: results agree with the delamination theory. Comparison with ion- and gas-nitrided samples are presented.

Modelling of phase transformations and hardening of carbonitrided steels

2004 ◽  
Vol 120 ◽  
pp. 129-136
Author(s):  
M. Przyłęcka ◽  
W. Gęstwa ◽  
G. E. Totten
Keyword(s):  
Wear Resistance ◽  
Phase Composition ◽  
Abrasive Wear ◽  
Phase Transformations ◽  
Thermal Processing ◽  
Retained Austenite ◽  
Abrasive Wear Resistance ◽  
Processing Conditions ◽  
The Impact

There are a variety of opinions regarding the influence of retained austenite and carbides on the properties exhibited by carbonitrided steels. In this paper, the development of a model marking relationship between phase composition, and properties of hardened carbonitrided steel has been presented. A summary of the impact of structure on properties is provided in Table 1. In the study reported here, the impact of thermal processing conditions on retained austenite and carbides was examined for carbonitrided and hardened 20 (C22), 20H (20Cr4), 15HN (17CrNi6-6) and 16HG (16MnCr5) steels. The models that are reported were experimentally validated. In particular, the results obtained for structure with respect to hardness and abrasive wear resistance were discussed for carbonitrided and hardened 20H (20Cr4) steel.

scholarly journals Arc Thermal Spray NiCr20 Alloy Coating: Fabrication, Sealant, Heat Treatment, Wear, and Corrosion Resistances

2019 ◽  
Vol 2019 ◽  
pp. 1-8 ◽  
Author(s):  
Van Tuan Nguyen ◽  
Quy Le Thu ◽  
Tuan Anh Nguyen ◽  
Quoc Cuong Ly ◽  
Ly Pham Thi ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Wear Resistance ◽  
Corrosion Resistance ◽  
Phase Composition ◽  
Corrosion Test ◽  
Annealing Temperature ◽  
Alloy Coating ◽  
Aluminum Phosphate ◽  
Annealing Temperatures ◽  
Wear And Corrosion

This study presents the effect of heat treatment on porosity, phase composition, microhardness, and wear and corrosion resistances of the thermal sprayed NiCr20 coating after sealing with aluminum phosphate. The annealing temperatures were varied in a range of 400 to 1000°C. The obtained results indicated the porosity of coating decreased with increasing the annealing temperature. After treatment at temperatures in range of 800-1000°C, more than 90% of initial pores in the coating were successfully filled with the sealants. The XRD data revealed not only the formation of new phases of other compounds, but also the interaction between coating and sealant. After heat treatment, wear resistance of coating was 12 times higher than that without heat treatment. The corrosion test in H2SO4 solution indicated that the presence of sealant in coatings increased their corrosion resistance. From these findings, application of these NiCr20 coatings to protect steel against wear and corrosion appears very promising.

scholarly journals Relationship between phase composition and wear resistance of titanium alloys

2020 ◽  
Vol 795 ◽  
pp. 012009
Author(s):  
I V Ivanov ◽  
A Thoemmes ◽  
K I Emurlaev ◽  
E I Tkachenko ◽  
E A Rudenya
Keyword(s):  
Wear Resistance ◽  
Phase Composition ◽  
Titanium Alloys

Research on the Structure and Wear Properties of Grind-Hardened 42CrMo

2012 ◽  
Vol 619 ◽  
pp. 561-566 ◽  
Author(s):  
Lian Yong Zhang ◽  
Fang Hong Sun ◽  
Yan Hua Jiang
Keyword(s):  
Wear Resistance ◽  
Abrasive Wear ◽  
Adhesive Wear ◽  
Lath Martensite ◽  
Hardened Layer ◽  
Wear Properties ◽  
42Crmo Steel ◽  
Grind Hardening

grind-hardening test was performed on 42CrMo steel in the paper. Microstructure of the hardened layer was observed and the wear-resistance of hardened specimens was done too. The results showed that microstructure of the fully hardened layer was mainly composed by lath martensite; microhardness of the hardened layer was above 700HV and the abrasive wear and the adhesive wear properties of hardened layer were 2~9 times than that of the base.

Influence of Laser Hardening to the Sliding Wear Resistance of the PVD (Al,Ti)N-G and nACo® Coatings

2014 ◽  
Vol 604 ◽  
pp. 28-31 ◽  
Author(s):  
Andrei Surzhenkov ◽  
Eron Adoberg ◽  
Maksim Antonov ◽  
Fjodor Sergejev ◽  
Valdek Mikli ◽  
...  
Keyword(s):  
Wear Resistance ◽  
Sliding Wear ◽  
Vapour Deposition ◽  
Hardened Layer ◽  
Laser Hardening ◽  
Beam Power ◽  
Physical Vapour Deposition ◽  
Hardening Process ◽  
Laser Beam Power ◽  
Scan Speed

In the present article, the laser hardening of the carbon steel C45, previously coated by the physical vapour deposition (PVD) process, is studied. The (Al,Ti)N-G and nACo® (nc-AlxTi1-xN/α-Si3N4) coatings were applied. Nd:YAG laser with the laser beam power density of 1945 W/cm2 and scan speed of 300 mm/min was used for hardening process. Laser hardening lead to the formation of hardened layer under both coatings, consisting of austenite and ferrite. The approximate depth of the hardened layer and maximal microhardness was approximately 0.2 mm and 955 HV0.05 and 0.1 mm and 520 HV0.05 in the case of the (Al,Ti)N-G and the nACo® coating, respectively. After laser hardening the sliding wear of the (Al,Ti)N-G coating decreased by 1.25 times and of the nACo® coating by 1.05 times.

scholarly journals Cast Hybrid Composites Designated for Air Compressor Pistons

2016 ◽  
Vol 61 (2) ◽  
pp. 705-708 ◽  
Author(s):  
A. J. Dolata ◽  
M. Dyzia ◽  
L. Jaworska ◽  
P. Putyra
Keyword(s):  
Wear Resistance ◽  
Composite Material ◽  
Phase Composition ◽  
Hybrid Composites ◽  
Selection Criterion ◽  
Stir Casting ◽  
Additional Parameter ◽  
Casting Method ◽  
Air Compressor ◽  
Component Selection

Abstract The main purpose of the investigations was to develop the phase composition of the composite assuming that the component selection criterion will be the formability of piston work surfaces during the machining. Wear resistance under the friction conditions was assumed as the additional parameter for the assessment of composite material. In the study were used AlSi7Mg/SiC+Cg and AlSi7Mg/SiC+GR hybrid composites prepared by the stir casting method.

scholarly journals LOCAL ALLOYING OF TITANIUM COPPER

2020 ◽  
pp. 12-16
Author(s):  
V. Shmorgun ◽  
O. Slautin ◽  
A. Serov ◽  
R. Novikov
Keyword(s):  
Wear Resistance ◽  
Titanium Alloy ◽  
Surface Layer ◽  
Phase Composition ◽  
Intermetallic Compounds ◽  
Laser Processing ◽  
Titanium Surface ◽  
Explosion Welding ◽  
Copper Plating ◽  
Fixed Abrasive

The influence of the parameters of laser processing of copper plating deposited by explosion welding and subsequent rolling on the titanium surface on the structure and phase composition of the coatings is studied. It is shown that alloying titanium with copper leads to the formation of intermetallic compounds (titanium cuprides) in the remelting zone, which contributes to a significant increase in the wear resistance of the surface layer. When tested for wear on a fixed abrasive, the wear resistance of the coating is 2 times higher than that of VT1-0 titanium alloy.

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