scholarly journals DESTRUCTION OF BLADES SURFACE COATING

2016 ◽  
pp. 103-107
Author(s):  
V. D. Parfenov ◽  
E. M. Yusupova ◽  
G. D. Basova
Keyword(s):  
Surface Layer ◽  
Hard Alloy ◽  
Surface Coating ◽  
Heating Temperature ◽  
Impact Resistance ◽  
Nitride Coating ◽  
Test Results ◽  
Titanium Nitride Coating ◽  
Temperature Impact ◽  
Alloy Surface Layer

The article discusses a change of impact elasticity (a crack resistance or other value characterizing a resistance to rupture) depending on the cutting blade heating temperature. The test results showed that high temperature impact resistance strengthening of the hard alloy blade structure by treatment of its surface with wearresistant refractory titanium nitride coating proved its effectiveness at 500 0C and at 600 0C. At temperature of 900 0C a deterioration occurs resulted from generation of defects in the coating and in the hard alloy surface layer which become the sites of destructive impact crack initiation.

Tribotechnical Characteristics of Titanium Nitride Coating for Heavy-Duty Friction Clutches.

1980 ◽  
Vol 41 (5) ◽  
pp. 558-566
Author(s):  
O. Yu Elagina ◽  
◽  
D.O. Kolbas ◽  
A.G. Buklakov ◽  
N. Derr ◽  
...  
Keyword(s):  
Titanium Nitride ◽  
Nitride Coating ◽  
Heavy Duty ◽  
Titanium Nitride Coating ◽  
Tribotechnical Characteristics

Utilisation of High-Energy Heat Sources in Magnesium Alloy Surface Layer Treatment

2013 ◽  
Vol 58 (2) ◽  
pp. 619-624 ◽  
Author(s):  
M. Szafarska ◽  
J. Iwaszko ◽  
K. Kudła ◽  
I. Łegowik
Keyword(s):  
Surface Layer ◽  
Magnesium Alloy ◽  
Physicochemical Properties ◽  
Treatment Effectiveness ◽  
High Energy ◽  
Alloy Surface ◽  
Heat Sources ◽  
X Ray ◽  
Additional Equipment ◽  
Alloy Surface Layer

The main aim of the study was the evaluation of magnesium alloy surface treatment effectiveness using high-energy heat sources, i.e. a Yb-YAG Disk Laser and the GTAW method. The AZ91 and AM60 commercial magnesium alloys were subject to surface layer modification. Because of the physicochemical properties of the materials studied in case of the GTAW method, it was necessary to provide the welding stand with additional equipment. A novel two-torch set with torches operating in tandem was developed within the experiment. The effectiveness of specimen remelting using a laser and the GTAW method was verified based on macro- and microscopic examinations as well as in X-ray phase analysis and hardness measurements. In addition, the remelting parameters were optimised. The proposed treatment methodology enabled the achieving of the intended result and effective modification of a magnesium alloy surface layer.

CARLSON ALLOY NITRONIC 60

Alloy Digest ◽  
2009 ◽  
Vol 58 (2) ◽  
Keyword(s):  
Stainless Steel ◽  
Wear Resistance ◽  
Nickel Alloys ◽  
High Temperature Oxidation ◽  
Lower Cost ◽  
Impact Resistance ◽  
Corrosion And Wear ◽  
Temperature Oxidation ◽  
High Nickel ◽  
Temperature Impact

Abstract CARLSON ALLOY NITRONIC 60 is a galling- and wear-resistant austenitic stainless steel that provides a significantly lower-cost alternative to cobalt-bearing and high-nickel alloys. Corrosion resistance is superior to 304 in most media. Approximately twice the yield strength of 340 and 316. Possesses excellent high-temperature oxidation resistance and low-temperature impact resistance. This datasheet provides information on composition, physical properties, hardness, and tensile properties. It also includes information on corrosion and wear resistance as well as forming. Filing Code: SS-1029. Producer or source: G.O. Carlson Inc.

Deterioration of Mechanical Properties of High-Strength Pumpcrete after Exposure to High Temperatures

2010 ◽  
Vol 168-170 ◽  
pp. 564-569
Author(s):  
Guang Lin Yuan ◽  
Jing Wei Zhang ◽  
Jian Wen Chen ◽  
Dan Yu Zhu
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Heating Rate ◽  
High Strength Concrete ◽  
Heating Temperature ◽  
High Strength ◽  
Air Cooling ◽  
Test Results ◽  
Strength Deterioration ◽  
Residual Compressive Strength

This paper makes an experimental study of mechanical properties of high-strength pumpcrete under fire, and the effects of heating rate, heating temperature and cooling mode on the residual compressive strength(RCS) of high-strength pumpcrete are investigated. The results show that under air cooling, the strength deterioration speed of high-strength concrete after high temperature increases with the increase of concrete strength grade. Also, the higher heating temperature is, the lower residual compressive strength value is. At the same heating rate (10°C/min), the residual compressive strength of C45 concrete after water cooling is a little higher than that after air cooling; but the test results are just the opposite for C55 and C65 concrete. The strength deterioration speed of high-strength concrete after high temperature increases with the increase of heating rate, but not in proportion. And when the heating temperature rises up between 200°C and 500°C, heating rate has the most remarkable effect on the residual compressive strength of concrete. These test results provide scientific proofs for further evaluation and analysis of mechanical properties of reinforced-concrete after exposure to high temperatures.

Effects of Heat Treatment on Microstructure Parameters, Mechanical Properties and Cold Resistance of Sparingly Alloyed High-Strength Steel

2021 ◽  
Vol 410 ◽  
pp. 197-202
Author(s):  
Pavel P. Poleckov ◽  
Olga A. Nikitenko ◽  
Alla S. Kuznetsova
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Cold Resistance ◽  
Heating Temperature ◽  
High Strength ◽  
Steel Microstructure ◽  
Treatment Conditions ◽  
Microstructure Parameters ◽  
Temperature Impact ◽  
Low Temperature Impact Toughness

This study considers the influence of various heat treatment conditions on the change of steel microstructure parameters, mechanical properties and cold resistance at a temperature of-60 °C. The common behavior of these properties is considered depending on the heating temperature used for quenching and subsequent tempering. Based on the obtained results, heat treatment conditions are proposed that provide a combination of a guaranteed yield point σ0.2 ≥600 N/mm2 with a low-temperature impact toughness KCV-60 ≥50 J/cm2 and plasticity δ5 ≥17%. The obtained research results are intended for industrial use at the mill "5000" site of MMK PJSC.

Phase and structural states in the NiTi-based alloy surface layer formed by electron-ion-plasma methods using tantalum

2015 ◽  
Author(s):  
Aleksei A. Neiman ◽  
Ludmila L. Meisner ◽  
Aleksandr I. Lotkov ◽  
Ekaterina Y. Gudimova ◽  
Viktor O. Semin
Keyword(s):  
Surface Layer ◽  
Alloy Surface ◽  
Ion Plasma ◽  
Plasma Methods ◽  
Alloy Surface Layer
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