scholarly journals Selected Properties Of Thermally Sprayed Oxide Ceramic Coatings

2015 ◽  
Vol 15 (3) ◽  
pp. 17-32 ◽  
Author(s):  
A. Czupryński
Keyword(s):  
Wear Resistance ◽  
Abrasive Wear ◽  
Calcium Oxide ◽  
Zirconium Oxide ◽  
Steel Substrate ◽  
Ceramic Coatings ◽  
Abrasive Wear Resistance ◽  
Flame Spraying ◽  
Oxide Ceramic ◽  
Wide Range

Abstract The article presents the results of the study on exploitation properties of flame sprayed ceramic coatings produced by oxide ceramic material in the form of powder on the aluminum oxide Al2O3 matrix with 3% titanium oxide TiO2 addition and also on the zirconium oxide (ZrO2) matrix with 30% calcium oxide (CaO) on the substrate of unalloyed structural steel of S235JR grade. As a primer powder, metallic powder on the base of Ni-Al-Mo has been applied. Plates with dimensions of 5×200×300 mm and also front surfaces of ∅40×50 mm cylinders have been flame sprayed. Spraying of primer coating has been done using RotoTec 80 torch and external specific coating has been done with CastoDyn DS 8000 torch. Investigations of coating properties are based on metallography tests, phase composition research, measurement of microhardness, coating adhesion to the ground research (acc. to EN 582:1996 standard), abrasive wear resistance (acc. to ASTM G65 standard) and erosion wear resistance (acc. to ASTM G76-95 standard) and thermal stroke study. Performed tests have shown that the flame spraying with 97%Al2O3 powder containing 3% TiO2 and also by the powder based on zirconium oxide (ZrO2) containing 30% calcium oxide (CaO) performed in a wide range of technological parameters allow to obtain high quality ceramic coatings with thickness up to ca. 500 μm on a steel substrate. The primer coating sprayed with the Ni-Al-Mo powder to the steel substrate and external coatings sprayed has the of mechanical bonding character. The coatings are characterized by high adhesion to the substrate and also high erosion and abrasive wear resistance and the resistance for cyclic thermal stroke.

scholarly journals Testing of Flame Sprayed Al2O3 Matrix Coatings Containing TiO2

2016 ◽  
Vol 61 (3) ◽  
pp. 1363-1370 ◽  
Author(s):  
A. Czupryński ◽  
J. Górka ◽  
M. Adamiak ◽  
B. Tomiczek
Keyword(s):  
Wear Resistance ◽  
Abrasive Wear ◽  
Steel Substrate ◽  
Aluminium Oxide ◽  
Ceramic Coatings ◽  
Abrasive Wear Resistance ◽  
Flame Spraying ◽  
Oxide Ceramic ◽  
Al2o3 Matrix ◽  
External Coating

Abstract The paper presents the results of the properties of flame sprayed ceramic coatings using oxide ceramic materials coating of a powdered aluminium oxide (Al2O3) matrix with 3% titanium oxide (TiO2) applied to unalloyed S235JR grade structural steel. A primer consisting of a metallic Ni-Al-Mo based powder has been applied to plates with dimensions of 5×200×300 mm and front surfaces of Ø40×50 mm cylinders. Flame spraying of primer coating was made using a RotoTec 80 torch, and an external coating was made with a CastoDyn DS 8000 torch. Evaluation of the coating properties was conducted using metallographic testing, phase composition research, measurement of microhardness, substrate coating adhesion (acc. to EN 582:1996 standard), erosion wear resistance (acc. to ASTM G76-95 standard), and abrasive wear resistance (acc. to ASTM G65 standard) and thermal impact. The testing performed has demonstrated that flame spraying with 97% Al2O3 powder containing 3% TiO2 performed in a range of parameters allows for obtaining high-quality ceramic coatings with thickness up to ca. 500 µm on a steel base. Spray coating possesses a structure consisting mainly of aluminium oxide and a small amount of NiAl10O16 and NiAl32O49 phases. The bonding primer coat sprayed with the Ni-Al-Mo powder to the steel substrate and external coating sprayed with the 97% Al2O3 powder with 3% TiO2 addition demonstrates mechanical bonding characteristics. The coating is characterized by a high adhesion to the base amounting to 6.5 MPa. Average hardness of the external coating is ca. 780 HV. The obtained coatings are characterized by high erosion and abrasive wear resistance and the resistance to effects of cyclic thermal shock.

Testing of Flame Sprayed ZrO2 Matrix Coatings Containing CaO

2015 ◽  
Vol 809-810 ◽  
pp. 501-506 ◽  
Author(s):  
Jacek Górka ◽  
Artur Czupryński
Keyword(s):  
Wear Resistance ◽  
Zirconium Oxide ◽  
External Surface ◽  
Ceramic Materials ◽  
Ceramic Coatings ◽  
Abrasive Wear Resistance ◽  
Flame Spraying ◽  
Oxide Ceramic ◽  
Erosion Wear ◽  
Coating Properties

Presented in this article are the properties of flame sprayed ceramic coatings using oxide ceramic materials consisting of a powdered zirconium oxide (ZrO2) matrix with 30% calcium oxide (CaO) applied to unalloyed S235JR grade structural steel. A primer consisting of a metallic Ni-Al-Mo based powder has been applied to plates with dimensions of 5x200x300 mm and front surfaces of ø 40x50 mm cylinders. Flame spraying of primer coating was conducted using a RotoTec 80 torch, and an external surface was coated with a CastoDyn DS 8000 torch. Evaluation of the coating properties was conducted using metallographic testing, phase composition research, measurement of microhardness, abrasive wear resistance (acc. to ASTM G65 standard) and erosion wear resistance (acc. to ASTM G76-95 standard).

Microstructure Characterization and Abrasive Wear Performance of HVOF Sprayed WC-Co Coatings

2011 ◽  
Vol 189-193 ◽  
pp. 707-710 ◽  
Author(s):  
Hong Tao Wang ◽  
Gang Chang Ji ◽  
Qing Yu Chen ◽  
Xue Fei Du ◽  
Wei Fu
Keyword(s):  
Wear Resistance ◽  
Abrasive Wear ◽  
Steel Substrate ◽  
Abrasive Wear Resistance ◽  
Wear Performance ◽  
Coating Microstructure ◽  
Powder Type ◽  
Worn Surface ◽  
Thermally Sprayed ◽  
Conventional Counterpart

In this paper the nanostructured and conventional WC-12Co feedstock powders were thermally sprayed via high velocity oxy-fuel (HVOF) on the mild steel substrate. The influence of the feedstock powder type on the microstructure of coatings and abrasive wear resistance properties was studied. The correlation between the coating microstructure and the wear performance was investigated by analyzing the microstructure and worn surface morphology of the coatings. The results indicated that the nanostructured coating shows higher porosity, but slightly higher microhardness and better abrasive wear resistance than the conventional counterpart. Also, the two coatings have excellent abrasive wear resistance with respect to the substrate.

scholarly journals Wire Electrical Discharge Machining Of Feal Intermetallic Sinters Without And With Addition Of Nano-Al2O3 Oxide Ceramic

2015 ◽  
Vol 60 (3) ◽  
pp. 2447-2456
Author(s):  
M. Ziętala ◽  
T. Durejko ◽  
M. Łazińska
Keyword(s):  
Wear Resistance ◽  
Surface Layer ◽  
Abrasive Wear ◽  
Electrical Discharge ◽  
Electrical Discharge Machining ◽  
Load Capacity ◽  
Abrasive Wear Resistance ◽  
Oxide Ceramic ◽  
Wire Electrical Discharge Machining ◽  
Technological Parameters

AbstractThe influence of the parameters of wire electrical discharge machining (WEDM) on the surface layer of FeAl based sinters with and without Al2O3nanoceramic addition has been studied in this paper. The properties of the sinters surface layer were controlled by WEDM parameters, including time of interval (tp) and amplitude of current (IA). The WEDM roughing and finishing treatments were carried out for selected technological parameters of process. The surface texture (ST) of the sinters after WEDM was analyzed by profilometer method. Theoretical parameters describing abrasive wear resistance of investigated sinters were estimated on the basis on the load capacity curve.On the basis on obtained results it can be stated that there is possibility of shaping geometry of nano-Al2O3doped and undoped FeAl sinters by WEDM. Reduction of the time of interval (tp) and increase of current amplitude (IA) during WEDM deteriorate surface properties. Addition of nano-Al2O3improve the quality of the obtained surface. Applied parameters of WEDM improve theoretical abrasive wear resistance and lubricant maintenance of the nanoceramic doped material in comparison with undoped sinter.

Effect of Microstructure on Properties of NiCrBSi Alloys Applied by Flame-Powder Deposition

2014 ◽  
Vol 1059 ◽  
pp. 1-9 ◽  
Author(s):  
Rastislav Mikuš ◽  
Ivan Kováč ◽  
Jozef Žarnovský
Keyword(s):  
Solid Solution ◽  
Wear Resistance ◽  
Chemical Composition ◽  
Abrasive Wear ◽  
Carbon Content ◽  
Microstructural Analysis ◽  
Abrasive Wear Resistance ◽  
Micro Hardness ◽  
Intermediate Phases ◽  
Wide Range

This article deals with studying the relationships among the chemical composition, microstructure and properties (hardness, micro-hardness, wear resistance) of powder additives based on NiCrBSi after their deposition. Tested materials reached a relatively wide range of hardness after deposition, which corresponds to their chemical composition and microstructure. The abrasive wear resistance of materials was tested on an emery cloth. The results indicate that both the hardness and abrasive wear resistance of tested materials depend especially on the content of carbon and chromium. Microstructural analysis indicates that the structure of tested materials is formed by the γ-Ni solid solution and intermediate phases based on boron, silicon and carbon. Those mostly form eutectics (three types), or are excluded by precipitation. There was also found a significant effect of chromium, but especially carbon content on the ratio between the solid solution and eutectics in the microstructure of tested materials. These different ratios of solid solution and eutectics were markedly reflected in micro-hardness behaviours in deposited layers. Micro-hardness values confirmed also the presence of carbidic particles in the layers with carbon content higher than 0.7 wt%.

Determination of Abrasive Wear Resistance of Plasma Sprayed Coatings on Stainless Steel Substrate

2015 ◽  
Vol 766-767 ◽  
pp. 579-584 ◽  
Author(s):  
A. Anderson
Keyword(s):  
Stainless Steel ◽  
Wear Resistance ◽  
Abrasive Wear ◽  
Steel Substrate ◽  
Ceramic Coatings ◽  
Atmospheric Plasma ◽  
Wear Behaviour ◽  
Coating Materials ◽  
Plasma Sprayed Coatings ◽  
Plasma Sprayed

A relative study among various types of coating materials to develop wear resistance of stainless steel has been performed. Ceramic coatings with the thickness up to 250 μm were prepared by Atmospheric plasma spray technique on the stainless steel. Two different types of coating materials such that Yttria Stabilised Zirconia, Zirconia Ceria powder were used. The influence of Ceria powder on abrasive wear was determined. It was found that the addition of Ceria to Yttria Stabilised Zirconia in a sufficient amount helped in increasing its wear resistance compared to the wear behaviour of pure Yttria Stabilised Zirconia powder. Moreover, it was found that the lesser the surface roughness of the coating layer,.

Research of the Durability of a Covering from Oxide Ceramics

2006 ◽  
Vol 113 ◽  
pp. 500-506
Author(s):  
Liudas Albinas Kuliavas ◽  
Jonas Mockaitis
Keyword(s):  
Wear Resistance ◽  
Superficial Layer ◽  
Carbon Steels ◽  
Abrasive Wear Resistance ◽  
Conversion Coating ◽  
Flame Spraying ◽  
Oxide Ceramic ◽  
Oxide Ceramics ◽  
Micro Hardness ◽  
Gas Flame

A lifetime of details directly influences the lifetime of machines and equipment. Details in most cases wear out, instead of collapsing. Raising their wear of resistance is a perspective problem. The most economic way is drawing hardwearing coverings on a surface of details made of carbon steel. In our work coverings from oxide ceramics (Al2O3 and Al2O3+TiO2), put by the way of a gas-flame spraying onto a surface of specimens made from carbon steels C20 and C45 were investigated. Before a conversion coating specimens became hardened, a temper was made, the surface was exposed to sandblasting, and the special sub layer for raising an adhesion of a covering with a basis was put on. After drawing a ceramic covering, the micro hardness of a covering and a basis was measured. Then the contact and abrasive wear resistance of surfaces on original installations was tested. The agency on wear- resistance of an aspect oxide ceramic type of wear – contact and abrasive, heating of the superficial layer arising because of a friction of two surfaces was investigated. At the end of the work, leading-outs are presented as a recommendation on the application of oxide ceramics for raising of wear resistance of steel details.

EFFECT OF SURFACE TREATMENT ON ABRASIVE WEAR RESISTANCE OF SEEDER COULTER FLAP

2016 ◽  
Vol 23 (03) ◽  
pp. 1650007 ◽  
Author(s):  
MARTA PACZKOWSKA ◽  
JAROSŁAW SELECH ◽  
ADAM PIASECKI
Keyword(s):  
Wear Resistance ◽  
Surface Modification ◽  
Abrasive Wear ◽  
Surface Treatment ◽  
Surface Condition ◽  
Thermal Spraying ◽  
Abrasive Wear Resistance ◽  
Laser Surface ◽  
Flame Spraying ◽  
Laser Surface Modification

The aim of this study was to investigate the effect of the surface condition of the coulters of a Poznaniak mechanical seeder working in a sand medium on their abrasive wear resistance. Two types of coulter flap surface treatments were performed. The first treatment method was flame spraying, performed with the use of Eutalloy 10112 powder and other method was laser surface modification consisting in remelting a piece of the coulter flap tip by means of TRUMPF’s CO2 molecular laser. The study involved the use of a purpose-built laboratory test stand dedicated to testing wear in a sandy medium. The study revealed that surface treatment changes surface microstructure and thus improves its hardness by [Formula: see text] to 3 times, which translates into two- to six-fold improvement in wear resistance per hectare of cultivated field. Laser surface modification is more economical than thermal spraying and that the coulter flap surface area modified by thermal spraying was much greater than in the case of laser remelting, and finally that the average wear measured as a weight loss of tested coulters was comparable, one can conclude that in the analyzed context laser surface modification will probably prove more efficient than flame spraying. The study showed that there exist ready-to-use technologies for improving operational performance and delaying terminal wear.

The abrasive wear resistance of ceramic coatings on metals

1965 ◽  
Vol 22 (6) ◽  
pp. 377-380
Author(s):  
K. P. Azarov ◽  
N. S. Demehenko
Keyword(s):  
Wear Resistance ◽  
Abrasive Wear ◽  
Ceramic Coatings ◽  
Abrasive Wear Resistance

BÖHLER K100

Alloy Digest ◽  
2020 ◽  
Vol 69 (3) ◽  
Keyword(s):  
Wear Resistance ◽  
Physical Properties ◽  
Abrasive Wear ◽  
Tool Steel ◽  
Cold Work ◽  
Abrasive Wear Resistance ◽  
High Carbon ◽  
High Chromium ◽  
Cold Work Tool Steel

Abstract Böhler K100 is a high-carbon, high-chromium (12%), alloy cold-work tool steel that is suitable for medium run tooling in applications where a very good abrasive wear resistance is needed but where demands on chipping resistance are small. This datasheet provides information on composition, physical properties, hardness, and elasticity. It also includes information on forming and machining. Filing Code: TS-788. Producer or source: voestalpine Böhler Edelstahl GmbH & Co.

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