Pavol Švec
YOU?
Author Swipe
View article: Wear of TiAlCN Coating on HCR Gear
Wear of TiAlCN Coating on HCR Gear Open
Wear of TiAlCN coatings deposited on HCR (High Contact Ratio) gears was studied by the Niemann test during which the tested gears were loaded up to the 12th load stage. The resistance against scuffing was evaluated based on the criteria of…
View article: Microstructure and mechanical properties of b4c-tib2 composites reactive sintered from B4C + TiO2 precursors
Microstructure and mechanical properties of b4c-tib2 composites reactive sintered from B4C + TiO2 precursors Open
Ceramic composites consisting of a boron carbide (B4C) matrix and titanium diboride (TiB2) secondary phase were obtained by reactive sintering from boron carbide powder with 40 and 50wt.% of titanium dioxide (TiO2) additive. The same sinte…
View article: Wear of AlCrN and CrAlSiN Coatings Applied to Nonstandard Involute Gears
Wear of AlCrN and CrAlSiN Coatings Applied to Nonstandard Involute Gears Open
Wear of nonstandard involute gears with two types of coatings, AlCrN and CrAlSiN, was studied. The coatings were applied by cathodic arc deposition. The gears were tested using a Niemann tester at a graduated load up to the 12th load stage…
View article: Effect of Mechanical Properties on Wear Resistance of Si3N4 – SiC Ceramic Composite
Effect of Mechanical Properties on Wear Resistance of Si3N4 – SiC Ceramic Composite Open
The effect of mechanical properties on wear resistance of Si3N4 - SiC composite materials with different portions of SiC strengthening phase was investigated. Properties of monolithic silicon nitride were compared to ceramic composites con…
View article: Hot Pressing of Boron Carbide Based Ceramic Composites
Hot Pressing of Boron Carbide Based Ceramic Composites Open
Ceramic composite materials based on boron carbide were hot pressed utilising in situ reaction of boron carbide powder with 40 wt.% of titanium dioxide sintering additive. The samples were prepared at sintering temperature of 1850 °C, pres…
View article: Microstructure and Selected Properties of Si3N4 + SiC Composite
Microstructure and Selected Properties of Si3N4 + SiC Composite Open
The effects of strengthening phase in particulate ceramic composites on their properties were studied in presented paper. The experimental materials were a monolithic Si3N4 and particulate ceramic composites consisting of Si3N4 matrix with…
View article: BORON CARBIDE BASED CERAMIC COMPOSITES HOT PRESSED WITH ALUMINIUM ADDITIVE
BORON CARBIDE BASED CERAMIC COMPOSITES HOT PRESSED WITH ALUMINIUM ADDITIVE Open
Ceramic composite materials consisting of B4C matrix and Al8B4C7 secondary phase were prepared by in situ reactive sintering of the initial powder mixture B4C-Al with concentration from 5 to 25 wt.% Al sintering additives. The composite sa…
View article: Analysis of the Drawing Process of Small-Sized Seam Tubes
Analysis of the Drawing Process of Small-Sized Seam Tubes Open
This article is focused on an analysis of factors negatively affecting the tube production process of tubes made from austenitic stainless steel with a very small diameter of ϕ 0.34 mm. The analysis was concentrated on factors that affect …
View article: A Study of Wear in Thin Coatings Applied to Convex-Concave Gearings
A Study of Wear in Thin Coatings Applied to Convex-Concave Gearings Open
The submitted contribution deals with the wear of thin coatings applied to convex–concave gearings for gear made from C45E steel. The influence of the tribological characteristics (friction coefficient, wear, adhesion and hardness) of the …
View article: The Effect of Sintering Time on Wear Resistance of Silicon Nitride
The Effect of Sintering Time on Wear Resistance of Silicon Nitride Open
The effect of sintering time on chosen mechanical and tribological properties of silicon nitride (Si3N4) with 5 wt.% of yttrium aluminium garnet (Y3Al5O12) ceramics was investigated. Si3N4 ceramics sintered for shorter sintering time conta…
View article: Reactive sintering of B4c-TiB2 composites from B4 and TiO2 precursors
Reactive sintering of B4c-TiB2 composites from B4 and TiO2 precursors Open
The effect of sintering temperature in the interval from 1775 to 1850?C on the density, microstructure, hardness and fracture toughness of ceramic composites consisting of a boron carbide matrix and titanium diboride secondary phase was st…
View article: Study of Sintering Parameters and Sintering Additives Effect on selected properties of Silicon Nitride
Study of Sintering Parameters and Sintering Additives Effect on selected properties of Silicon Nitride Open
The subject of this article is the study of influence of sintering time and sintering additives on mechanical properties and wear resistance. Si3N4 with Al2O3+Y2O3 additives (YAG) and Si3N4 with MgO additives was used as an experimental ma…
View article: Tubes bending by tod from abrasion resistance cast iron
Tubes bending by tod from abrasion resistance cast iron Open
View article: Simulation Process Deep Drawing of Tailor Welded Blanks DP600 and BH220 Materials in Tool With Elastic Blankholder
Simulation Process Deep Drawing of Tailor Welded Blanks DP600 and BH220 Materials in Tool With Elastic Blankholder Open
The high-strength steels and tailor welded blanks (TWB) are applied in construction of cars parts to reduction of cars weight [1, 2]. The application of these materials brings possible complicatons during the forming when it proves the con…
View article: Reduction of Sink Marks in Injection Overmolding Process of Metal-Plastic Parts
Reduction of Sink Marks in Injection Overmolding Process of Metal-Plastic Parts Open
Metal-plastic parts with steel inserts prepared by overmolding technique showed several molding defects including sink marks. The depths of sink marks on overmolding metal-plastic parts prepared at two injection overmolding temperatures of…
View article: Deformation Properties of Tailor Welded Blank Made of Dual Phase Steels
Deformation Properties of Tailor Welded Blank Made of Dual Phase Steels Open
The paper is dedicated to forming and properties of passenger car’s B-pillar reinforcement drawn from simple blank and alternatively tailor-welded blank (TWB). Drawn part is characterised by a place with a large strain, while forming proce…
View article: Deep drawing of tailor-welded blanks made of high-strength steel
Deep drawing of tailor-welded blanks made of high-strength steel Open
A comparison study was conducted to evaluate the deep drawing of a rectangular box from tailor-welded blank, composed of two parts of different thicknesses.The blank material is high strength steel with transformation induced plasticity, a…
View article: FIBRE LASER WELDING OF DUAL PHASE STEELS
FIBRE LASER WELDING OF DUAL PHASE STEELS Open
The fibre laser welding of two different dual phase steels HCT980X and HCT600X was evaluated. The sheets with thickness of 1.2 mm were welded using the solid-state fibre laser IPG type YLR 4500 with maximum output 4.5 kW and wave length 10…
View article: Optimization of Overmolding Process of Metal-Plastic Part
Optimization of Overmolding Process of Metal-Plastic Part Open
Metal-plastic parts with steel inserts prepared by overmolding technique showed several cracks. Cracks marked as no 1 and 2 were noticed immediately after overmoulding process. Cracks no 3 and 4 were propagated only several days after over…