PROPERTIES OF DUPLEX LAYERS PRODUCED IN A VACUUM CHROMIZING PROCESS ON STEEL COVERED WITH COBALT ALLOY

Tribologia ◽  
2016 ◽  
Vol 269 (5) ◽  
pp. 63-72
Author(s):  
Ewa KASPRZYCKA ◽  
Bogdan BOGDAŃSKI
Keyword(s):  
Wear Resistance ◽  
Corrosion Resistance ◽  
Tool Steel ◽  
Diffusion Zone ◽  
Steel Surface ◽  
Structure And Properties ◽  
Cobalt Alloy ◽  
Depth Profiles ◽  
Electrolytic Coating ◽  
Concentration Depth Profiles

The paper presents the results of examinations of the structure and properties of duplex layers of the CrC+(Co-W) type, produced in a vacuum chromizing process on a tool steel surface covered with Co-W electrolytic alloy. A comparison of the CrC+(Co-W) type duplex layers with the CrC type single carbide layers, produced in vacuum chromizing process, were performed. Studies of layers thickness, their hardness, structure, and concentration depth profiles of elements in the diffusion zone of these layers were carried out. Tribological properties of the layers and corrosion resistance were determined. It has been proven that the wear resistance by friction of the CrC+(Co-W) type duplex layers, produced by means vacuum chromizing of tool steel covered with Co-W alloy electrolytic coating, is as good as single carbide layers of the CrC type, but their corrosion resistance is higher.

scholarly journals Tribological Properties of Duplex Layers Produced by Vacuum Titanizing Process Combined with the Electrolytic Deposition of Cobalt Alloy

2015 ◽  
Author(s):  
E. Kasprzycka ◽  
B. Bogdanski
Keyword(s):  
Wear Resistance ◽  
Corrosion Resistance ◽  
Tool Steel ◽  
Tribological Properties ◽  
Steel Surface ◽  
Electrolytic Deposition ◽  
Cobalt Alloy ◽  
Technological Processes ◽  
Electrolytic Coating ◽  
Steel Surfaces

A new technological processes combining a vacuum titanizing with a preliminary electrolytic deposition of Co-W alloy on the tool steel surface have been proposed to increase the corrosion resistance of carbide layers of TiC type. As a result, duplex layers of TiC+(Co-W) type on the steel surfaces have been obtained. It has been proved, that the wear resistance by friction of these duplex layers, produced by means vacuum titanizing of steel covered with electrolytic coating, is such good as the TiC carbide layers, produced on the steel surface without electrolytic coating, but their corrosion resistance is higher.

Tribological Properties of Carbide Layers Produced in the Vacuum Titanizing Process

2005 ◽  
Author(s):  
Ewa Kasprzycka ◽  
Jan Senatorski ◽  
Aleksander Nakonieczny ◽  
Marian Szczerek ◽  
Tomasz Babul ◽  
...  
Keyword(s):  
Wear Resistance ◽  
Process Parameters ◽  
Tribological Properties ◽  
Diffusion Zone ◽  
Steel Surface ◽  
Iron Concentration ◽  
Layer Growth ◽  
Depth Profiles ◽  
Kinetics Of ◽  
Concentration Depth Profiles

Diffusion carbide layers produced on steel surface in vacuum titanizing process have been investigated. Studies of layers thickness, their morphology, titanium, carbon, chromium and iron concentration depth profiles in the diffusion zone of titanized layers have been carried out. The effect of process parameters such as time and temperature on the kinetics of layer growth on steel surface has been investigated. Wear resistance of titanized layers has been determined.

MILNE CMV

Alloy Digest ◽  
1961 ◽  
Vol 10 (11) ◽  
Keyword(s):  
Fracture Toughness ◽  
Wear Resistance ◽  
Corrosion Resistance ◽  
High Temperature ◽  
Tensile Properties ◽  
Tool Steel ◽  
Compression Strength ◽  
Heat Treating ◽  
Medium Carbon ◽  
Temperature Performance

Abstract Milne CMV is a 5% chromium, medium-carbon hot work tool steel, having high compression strength, wear resistance, and corrosion resistance. This datasheet provides information on composition, hardness, and tensile properties as well as fracture toughness and creep. It also includes information on high temperature performance as well as forming, heat treating, machining, and joining. Filing Code: TS-111. Producer or source: A. Milne & Company (Distributor).

scholarly journals Production and Properties of FeB-Fe2B-Fe3(B,C) Surface Layers Formed on Tool Steel Using Combination of Diffusion and Laser Processing

Coatings ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 1130 ◽  
Author(s):  
Aneta Bartkowska
Keyword(s):  
Wear Resistance ◽  
Corrosion Resistance ◽  
Laser Beam ◽  
Tool Steel ◽  
Laser Processing ◽  
Steel Substrate ◽  
Beam Power ◽  
Slight Reduction ◽  
Laser Beam Power ◽  
Study Results

The paper presents the study results of laser remelting diffusion boronized layers produced on CT90 tool steel. A diffusion boronized layer was produced at 950 °C in a powder mixture containing boron carbide as a source of boron. A needle-like microstructure of iron boride was obtained. After diffusion boronizing, the specimens were subjected to laser processing, which was carried out using a diode laser with a nominal power of 3 kW. Three laser beam power values were applied (600, 900, and 1200 W). The aim of the study was to investigate the microstructure, microhardness, chemical, and phase composition as well as the wear and corrosion resistance of newly formed FeB-Fe2B-Fe3(B,C) layers. As a result of the laser beam interaction, the needle-like borides occurring in the subsurface zone were remelted, and three characteristic areas were obtained: the remelted zone, the heat-affected zone, and the substrate. The properties of newly formed layers have improved in comparison to diffusion boronized layers (except for corrosion resistance). It should be noted that using the highest laser beam power contributed to a slight reduction in wear resistance. Both the reduced corrosion and wear resistance were caused by greater remelting of the steel substrate and thus by the increased iron content in the formed layer.

14-4CrMo

Alloy Digest ◽  
2001 ◽  
Vol 50 (10) ◽  
Keyword(s):  
Wear Resistance ◽  
Corrosion Resistance ◽  
Physical Properties ◽  
Tool Steel ◽  
Heat Treating ◽  
Corrosion And Wear ◽  
Wear Resistant

Abstract 14-4CrMo is a martensitic stainless tool steel with better corrosion resistance than Type 440C. Molybdenum increases the corrosion resistance and produces wear-resistant carbides. The alloy is used for its wear resistance and edge retention. This datasheet provides information on composition, physical properties, hardness, and elasticity. It also includes information on corrosion and wear resistance as well as heat treating and machining. Filing Code: SS-832. Producer or source: Timken Latrobe Steel.

MICRO-MELT 420-CW

Alloy Digest ◽  
2009 ◽  
Vol 58 (1) ◽  
Keyword(s):  
Fracture Toughness ◽  
Wear Resistance ◽  
Corrosion Resistance ◽  
Physical Properties ◽  
Tool Steel ◽  
Heat Treating ◽  
Corrosion And Wear ◽  
Powder Metal ◽  
Wear Resistant

Abstract Micro-Melt 420-CW is a powder-produced wear-resistant tool steel with corrosion resistance. This datasheet provides information on composition, physical properties, hardness, and elasticity as well as fracture toughness. It also includes information on corrosion and wear resistance as well as forming, heat treating, machining, and powder metal forms. Filing Code: TS-676. Producer or source: Carpenter Powder Products.

scholarly journals Microstructural and Mechanical Properties of B-Cr Coatings Formed on 145Cr6 Tool Steel by Laser Remelting of Diffusion Borochromized Layer Using Diode Laser

Coatings ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 608
Author(s):  
Aneta Bartkowska ◽  
Dariusz Bartkowski ◽  
Damian Przestacki ◽  
Jakub Hajkowski ◽  
Andrzej Miklaszewski
Keyword(s):  
Wear Resistance ◽  
Corrosion Resistance ◽  
Laser Beam ◽  
Diode Laser ◽  
Tool Steel ◽  
The Other ◽  
Beam Power ◽  
Other Hand ◽  
Laser Beam Power ◽  
Study Results

The paper presents study results focused on the microstructural, mechanical, and physicochemical properties of B-Cr coatings obtained by means of modification of diffusion borochromized layers by diode laser beam. The studies were conducted on 145Cr6 tool steel. Diffusion borochromized layers were produced at 950 °C in powder mixture containing boron carbides as a source of boron and ferrochrome as a source of chromium. In the next step these layers were remelted using laser beam. Powers: 600, 900, and 1200 W were used during these processes. The microstructure, microhardness, chemical composition, as well as wear and corrosion resistance of newly-formed B-Cr coatings were determined. As a result of laser beam interaction, the diffusion borochromized layer was mixed with the steel substrate. The study showed that too low laser beam power causes cracks in the newly formed B-Cr coating, and on the other hand, too higher laser beam power causes deep remelting resulting in the loss of microhardness. The reduced corrosion resistance in comparison with diffusion borochromized layers was caused by occurrence cracks or deep remelting. For B-Cr coatings produced using laser beam power 600 W, a small decrease in wear resistance was observed, but note that this coating was much thicker than diffusion borochromized layers. On the other hand, laser beam power of 1200 W caused a significant decrease in wear resistance. Newly formed B-Cr coatings had an advantageous microhardness gradient between the layer and the substrate.

scholarly journals Influence of plasma electrolytic hardening modes on the structure and properties of 65G steel

2021 ◽  
Vol 5 (3) ◽  
pp. 209-221
Author(s):  
B.K. Rakhadilov ◽  
R.S. Kozhanova ◽  
D. Baizhan ◽  
L.G. Zhurerova ◽  
G.U. Yerbolatova ◽  
...  
Keyword(s):  
Wear Resistance ◽  
Steel Surface ◽  
Economic Effects ◽  
Structure And Properties ◽  
Laboratory Installation ◽  
Plasma Hardening ◽  
Study Results ◽  
Modified Layer ◽  
Plasma Electrolytic ◽  
Local Hardening

This work presented a study of the structure, hardness and wear resistance of 65G steel treated with electrolyte-plasma hardening under different conditions. The electrolyte-plasma hardening technology and a laboratory installation for the realisation of electrolyte-plasma hardening are also described. After electrolyte-plasma hardening, we have established that a modified layer consists of the a-phase (martensite) and M3C cementite. The study results showed that electrolyte-plasma hardening makes it possible to obtain layers on the 65G steel surface that provides an increase in microhardness by 2.6 times, wear resistance by two times, resistance to abrasive wear by 1.7 times compared to the original samples. In addition, local hardening ensures the achievement of technical and economic effects due to the absence of the need to isolate an unwanted site of parts, processing only the areas requiring hardening.

REYNOLDS 390 and A390

Alloy Digest ◽  
1971 ◽  
Vol 20 (8) ◽  
Keyword(s):  
Mechanical Properties ◽  
Wear Resistance ◽  
Corrosion Resistance ◽  
High Temperature ◽  
Physical Properties ◽  
High Hardness ◽  
Heat Treating ◽  
Silicon Alloys ◽  
Aluminum Silicon Alloys ◽  
Temperature Performance

Abstract REYNOLDS 390 and A390 are hypereutectic aluminum-silicon alloys having excellent wear resistance coupled with good mechanical properties, high hardness, and low coefficients of expansion. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fatigue. It also includes information on high temperature performance and corrosion resistance as well as casting, heat treating, and machining. Filing Code: Al-203. Producer or source: Reynolds Metals Company.

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