Evaluation of Structure, Phase Composition, and Operating Properties of Coatings Made by Laser Surfacing. Part 2*

2014 ◽  
Vol 50 (7-8) ◽  
pp. 468-474 ◽  
Author(s):  
O. Yu. Elagina ◽  
A. G. Buklakov ◽  
A. M. Vol’khin ◽  
E. V. Bol’shakova ◽  
R. S. Tret’yakov ◽  
...  
Keyword(s):  
Phase Composition ◽  
Properties Of Coatings ◽  
Operating Properties ◽  
Laser Surfacing ◽  
Structure Phase

scholarly journals Theoretical and technological aspects of production mechani‑cally alloyed powders for the production of coatings and products by additive methods

2021 ◽  
pp. 90-105
Author(s):  
F. G. Lovshenko ◽  
A. S. Fedosenko ◽  
E. I. Marukovich
Keyword(s):  
Phase Composition ◽  
Thermal Spraying ◽  
Thermal Spray Coatings ◽  
Layer By Layer ◽  
Properties Of Coatings ◽  
Spray Coatings ◽  
Structure Phase ◽  
316L Steel ◽  
Properties Of Materials ◽  
Additive Methods

The established regularities of the formation of powders based on iron and nickel, obtained by the method of mechanical alloying and intended for the deposition of thermal spraying coatings, as well as the manufacture of products by layer‑by‑layer synthesis. The structure, phase composition and properties of materials are investigated. Powders consist of particles with a size of 20–70 microns, differ in the submicrocrystalline type structures, and nonequilibrium phase composition. Thermal spray coatings made of them have a set of properties that significantly exceed the properties of coatings made of commercially available materials. The diameter of the grains of the material obtained by the SLМ method from the synthesized powder is 1.5–2.0 times smaller than that produced from the powder of 316L steel, and the heat resistance is higher.

scholarly journals Structure, phase composition, mechanical properties and wear resistance of steel after microarc boriding and vanadation

2019 ◽  
Vol 62 (6) ◽  
pp. 446-451 ◽  
Author(s):  
M. S. Stepanov ◽  
Yu. M. Dombrovskii ◽  
L. V. Davidyan
Keyword(s):  
Mechanical Properties ◽  
Wear Resistance ◽  
Surface Layer ◽  
Phase Composition ◽  
Alloying Elements ◽  
Base Layer ◽  
Discharge Zone ◽  
Initial State ◽  
Properties Of Coatings ◽  
Structure Phase

Boriding is a common method of thermo-chemical treatment of steel products. It increases their hardness and wear resistance, but also increases the surface fragility, has a long duration and high labor intensity. The combined coating with boron and vanadium is used to improve the properties, and it is possible to apply microarc surface alloying to reduce the duration of the diffusion saturation process. This makes it possible to intensify the diffusion of alloying elements by forming a gas discharge zone at the surface of the steel product. The aim of this work was to study the structure, phase composition, mechanical properties and wear resistance of steel after boriding and vanadation. During the experiments, a lubricant containing boron carbide powders B4C and ferrovanadium FeV80 were used, which was applied to the surface of the steel sample. During boriding and vanadation of steel a surface layer with a thickness of 150 – 190 μm is formed. It has a base with microhardness of 7.8 – 8.3 GPa and light grey granular inclusions and eutectic areas with microhardness of 13.5 – 14.0 GPa. Further there is a carbonized layer of eutectoid concentration, passing into the original ferrite-perlite structure. The content of alloying elements in the characteristic points of the surface layer was determined, which confirmed the increased content of carbon, vanadium and boron in the base layer, areas of eutectic and carbide phase. X-ray phase analysis revealed the presence of iron borides FeB and Fe2B, vanadium borides VB2 and V2B3 and vanadium carbide VC0.88 in the surface layer. Mechanical properties of coatings were studied by microindentation of its cross-section with registration and analysis of deformation diagram under loading and subsequent unloading of the indenter. Hardness at indentation in the base layer increased to 7.95 GPa, in dispersed inclusions – to 13.90 GPa. The modulus of elasticity for indentation in the base and inclusions is 238 MPa and 340 MPa, respectively. Creep and proportion of the plastic component in microindentation is naturally reduced with increase in hardness. Fine inclusions of iron borides, vanadium borides and carbides significantly increase the steel wear resistance. It has increased in 4 times during friction against the fixed abrasive particles in comparison with the initial state. 

Evaluation of Structural and Phase Composition and Corrosion Resistance Properties of Coatings Made by Laser Surfacing. Part 1

2014 ◽  
Vol 50 (5-6) ◽  
pp. 402-411 ◽  
Author(s):  
L. A. Efimenko ◽  
O. E. Kapustin ◽  
V. M. Gusev ◽  
A. O. Merkulova ◽  
N. I. Nikiforov
Keyword(s):  
Corrosion Resistance ◽  
Phase Composition ◽  
Properties Of Coatings ◽  
Laser Surfacing

Structure, Phase Composition, and Mechanical Properties of a Boron-Containing High-Nitrogen Austenitic Steel Made by Induction Melting

2020 ◽  
Vol 2020 (12) ◽  
pp. 1439-1445
Author(s):  
I. O. Bannykh ◽  
O. A. Bannykh ◽  
L. G. Rigina ◽  
E. N. Blinova ◽  
K. Yu. Demin ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Phase Composition ◽  
Austenitic Steel ◽  
Induction Melting ◽  
High Nitrogen ◽  
Structure Phase

Effect of heat treatment on the structure, phase composition, and mechanical properties of VN-10 alloy

1993 ◽  
Vol 29 (1) ◽  
pp. 56-60 ◽  
Author(s):  
O. I. Eliseeva ◽  
V. I. Kalyandruk ◽  
A. A. Denisova ◽  
V. V. Shirokov
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Phase Composition ◽  
Structure Phase
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