scholarly journals Study of properties of cored wire based on ferrochrome gas-cleaning dust

2019 ◽  
Vol 75 (3) ◽  
pp. 365-372 ◽  
Author(s):  
N. A. Kozyrev ◽  
A. A. Usol’tsev ◽  
A. N. Prudnikov ◽  
R. E. Kryukov ◽  
A.. R. Mikhno
Keyword(s):  
Wear Resistance ◽  
Chemical Composition ◽  
Statistical Processing ◽  
Aluminum Production ◽  
Recovery Coefficient ◽  
Cored Wire ◽  
Gas Cleaning ◽  
Filling Materials ◽  
Study Results ◽  
Cored Wires

Applying of wear-resistant alloyed coatings by build-up welding is one of methods to provide high operation properties of technological, metallurgical in particular equipment. Technologies of strengthening by direct alloying or reducing of alloying materials from oxide phases by reducing agent directly in the arc during building-up are most efficient ones. For build-up, cored wires are used frequently nowadays. A possibility to manufacture cored wires based on ferrochrome production gas-cleaning dust and powders of silicon, aluminum, and aluminum production gas-cleaning dust as reducing agents considered. Chemical composition and relation between cored wires components quoted. Manufacturing of 5 mm diameter wire accomplished at laboratory facility by running through draw plate. Duringestimation of efficiency of the manufactured cored wires application a regime of build-up was selected, study of chemical composition of built-up metal carried-out, wearing tests made, measuring of built-up samples hardness carried-out. Coefficients of chrome recovery coefficient at different relation between filling materials were calculated. Statistical processing of the study results accomplished statistical dependences of components content influence onthe built-up layer properties plotted. Study of the built-up showed, that chrome recovery in the built-up layer depends completely on the cored wire filling coefficient. At that under other conditions being equal, the hardness always correlates with the wear, and increase of chrome concentration results in reduction of the surface wear. Dependents of mass share elements comprising the cored wire content on built-up layer hardness and its wear resistance determined. The dependences obtained can be used for forecasting of builtup layer hardness and its wear resistance while built-up metal chemical composition varying.

scholarly journals V. Development of new powder wires for building-up. A powder wire based on dust of gas cleaning systems of silicomanganese

2018 ◽  
pp. 101-106
Author(s):  
N. A. Коzyrev ◽  
R. E. Kryukov ◽  
A. S. Nepomnyaschikh ◽  
A. A. Usol’tsev ◽  
М. V. Popova
Keyword(s):  
Chemical Composition ◽  
Nonmetallic Inclusions ◽  
Statistical Processing ◽  
Optical Microscope ◽  
Aluminum Production ◽  
Production Plant ◽  
Powder Wire ◽  
Gas Cleaning ◽  
Study Results ◽  
Wear Tests

A new powder wire developed by using dust of gas cleaning systems of silicomanganese production plant and powder of gas cleaning systems of aluminum production at different proportion of components. As components the following was used: dust of gas cleaning systems of aluminum production plant, % (mas.): 21–46.23 Al2O3; 18–27 F; 8–15 Na2O; 0.4–6 K2O; 0.7–2.3 CaO; 0.5–2.48 Si2O; 2.1–3.27 Fe2O3; 12.5–30.2 Ctotal; 0.07–0.9 MnO; 0.06–0.9 MgO; 0.09–0.19 S; 0.1–0.18 P, and dust of gas cleaning systems of silicomanganese production plant, % (mas.): 2.43 Al2O3; 1.32 Na2O; 5.56 K2O; 6.4 CaO; 29.19 SiO2; 0.137 BaO; 7.54 MgO; 0.23 S; 0.04 P; 1.067 Fe; 27.69 Mn; 2.687 Zn; 3.833 Pb.The building-up was done under a flux, made of slag of silicomanganese plant of Zapadno-Sibirsky steel-works, havin the chemical composition (%, mas.): 6.91–9.62 Al2O3; 22.85–31.70 CaO; 46.46–48.16 SiO2; 0.27–0.81 FeO; 6.48–7.92 MgO; 8.01–8.43 MnO; 0.28–0.76 F; 0.26–0.36 Na2O; 0.62 K2O; 0.15–0.17 S; 0.01 P. The building-up mode selected. Samples wear tests were carried out at machine 2070 СМТ-1. Chemical composition of the built-up metal was determined at spectrometer ДФС-71. The hardness of built-up layers was measured by hardness meter МЕТ-ДУ. The estimation of nonmetallic inclusions was made as per GOST 1778– 70 by optical microscope Olympus GX-51.Quality indices studied and coefficients of manganese recovery at different proportions of components calculated. Statistical processing of the study results was made, statistical curves of influence of component compositions on properties of built-up layer constructed.

scholarly journals Operation indices of the new cored wire of Fe−C−Si−Мn−Сr−Ni−Mo system

2019 ◽  
Vol 75 (7) ◽  
pp. 860-868
Author(s):  
N. A. Kozyrev ◽  
A. A. Usol’tsev ◽  
R. E. Kryukov ◽  
A. I. Gusev ◽  
I. V. Osetkovskii
Keyword(s):  
Mechanical Properties ◽  
Wear Resistance ◽  
Chemical Composition ◽  
Correlation Analysis ◽  
Abrasive Wear ◽  
Physical And Mechanical Properties ◽  
Mining Machine ◽  
Cored Wire ◽  
Machine Screw ◽  
Cored Wires

To protect and repair details of equipment, subjected to abrasive and shock-and-abrasive wear, a build-up of hard alloy is widely used to increase the wear resistance of details, operating under abrasion conditions. Cored wires of Fe−C−Si−Мn−Сr−Ni−Mo system of type A and B by MIS classification are the main wires used for wear-resistant build-up in Russia. For effective application of building-up wires it is necessary to know the dependence of built-up layer hardness and its wear resistance on mass share of elements included into the composition of the cored wires systems. Influence of chemical composition of he built-up layer, obtained by the building-up with application of new powder systems of Fe−C−Si−Мn−Сr−Ni−Mo, protected by RF patents, on its physical and mechanical properties studied. Based on the results of the multifactor correlation analysis accomplished, dependences of the built-up layer hardness and its wear resistance on mass share of elements included into the composition of the cored wires of Fe−C−Si−Мn−Сr−Ni−Mo system determined. The dependences obtained were used for forecasting of the built-up layer hardness and its wear resistance at changes of the chemical composition of the built-up layer. The tests of JOY 4LS20 mining machine screw protective plates at Kemerovo region mines, built-up by the elaborated cored wire, showed an increase of the resistance by 19.3% comparing with the analog plates built-up by DRATEC wire.

scholarly journals TUNGSTEN RECOVERY FROM OXIDE DURING FLUX CORD WIRE SURFACING

2019 ◽  
Vol 62 (3) ◽  
pp. 215-221
Author(s):  
N. A. Kozyrev ◽  
R. E. Kryukov ◽  
V. M. Shurupov ◽  
N. V. Kibko ◽  
L. P. Bashchenko
Keyword(s):  
Chemical Composition ◽  
Nonmetallic Inclusions ◽  
Tungsten Powder ◽  
Aluminum Production ◽  
Metallographic Analysis ◽  
Austenite Grain Size ◽  
Cored Wire ◽  
Gas Cleaning ◽  
Primary Austenite ◽  
Austenite Grain

 Influence of introduction of tungsten powder and tungsten concentrate into surfacing flux-cored wire on structure, structural components microhardness, hardness and wear of the surfacing layer has been studied. Flux cored tungsten-containing wires of H- and E-types according to the IIW classification were manufactured for surfacing in laboratory. Powders of silicon KR-1 (GOST 2169 – 69), manganese MR-0 (GOST 6008 – 82), chromium PKhA-1M (industrial standard TU 14-1-1474 – 75), vanadium VEL-1 (industrial standard TU 48-0533 – 71), nickel PNK-1l5 (GOST 9722 – 97), aluminum PAP-1 (GOST 5494 – 95), tungsten PVT (industrial standard TU 48-19-72 – 92) and iron powder PZhV-1 (GOST 9849 – 86) were used as fillers. In some wires tungsten concentrate KSh-4 (GOST 213 – 83) produced by “AIR” mining company” JSC was used instead of tungsten powder. Gas cleaning dust of aluminum production of the following chemical composition: 21.00 – 43.27 % Al2O3; 18 – 27 % F; 8 – 13 % Na2O; 0.4 – 6.0 % K2O; 0.7 – 2.1 % CaO; 0.50 – 2.48 % SiO2; 2.1 – 2.3 % Fe2O3; 12.5 – 28.2 % Cgen; 0.03 – – 0.90 % MnO %; 0.04 – 0.90 % MgO; 0.09 – 0.46 % S; 0.10 – – 0.18 % P (by weight) was used as a carbon-containing reducing agent. Wire with diameter of 5mm manufactured at laboratory installation ASAW 1250 tractor was used for surfacing. Surfacing modes were: Is = 400 – 450 A; Ud = 32 ÷ 36 V; Vs = 24 ÷ 30 m/h. Surfacing was performed under a layer of AN-26S flux and flux made of silicomanganese slag; number of deposited layers – 5. Chemical composition of deposited metal was determined, metallographic analysis of deposited layer was carried out: size of the former austenite grain, size of martensite needles, degree of contamination by nonmetallic inclusions were stated and wear tests were carried out, hardness and microhardness were measured. The possibility in principal of using tungsten concentrate instead of tungsten powder in studied flux cored wires is shown, degree of tungsten extraction was calculated. For H-type fluxcored wire, introduction of tungsten concentrate instead of tungsten powder into the charge of wire does not increase contamination of deposited layers with nonmetallic inclusions and reduces size of the primary austenite grain. Use of tungsten concentrate in E-type flux-cored wire manufacturing helps to reduce size of the primary austenite grain and size of martensite needles, increasing microhardness of martensite in structure of deposited layer. Introduction of tungsten concentrate instead of tungsten powder into the composition of the charge of H-type wire provides a significant increase in hardness and wear resistance of deposited layer.

Abrasive Wear Resistance Comparative Analysis of the Metal Surfaced by Flux Cored Wires Systems Fe-C-Si-Mn-Ni-Mo-W-V and Fe-C-Si-Mn-Cr-Ni-Mo-V

2017 ◽  
Vol 906 ◽  
pp. 1-7 ◽  
Author(s):  
I.V. Osetkovskiy ◽  
N.A. Kozyrev ◽  
R.E. Kryukov
Keyword(s):  
Grain Size ◽  
Wear Resistance ◽  
Comparative Analysis ◽  
Chemical Composition ◽  
Abrasive Wear ◽  
Abrasive Wear Resistance ◽  
Metallographic Analysis ◽  
Deposited Metal ◽  
Cored Wires ◽  
Made In

In the article is shown the comparative analysis between structures of surfaced by the flux coded wire metal systems Fe-C-Si-Mn-Cr-Ni-Mo-V and Fe-C-Si-Mn-Ni-Mo-W-V. These powder wires are supposed to be used in recovering details and equipment components and machines, that works in conditions of intensive abrasive – shock wear. Manufacturing and surfacing of flux cored wires samples were made in laboratory conditions. Defined chemical composition of the surfaced metal. Deposited metal samples hardness and wear resistance were researched. In the course of deposited meta surface metallographic analysis were made following metallographic researches: defined nature and level of nonmetallic oxides impurity, type and morphology of the microstructure, grain size of surfaced samples. Estimation of the chemical composition components influence on the hardness and wear resistance were obtained.

Experience of thick-walled calcium-containing cored wire application at steel ladle treatment

2021 ◽  
Vol 77 (9) ◽  
pp. 1020-1023
Author(s):  
M. K. Isaev ◽  
V. A. Bigeev ◽  
A. B. Sychkov ◽  
A. M/ Stolyarov
Keyword(s):  
Liquid Steel ◽  
Calcium Content ◽  
Efficiency Index ◽  
Ladle Treatment ◽  
Steel Shell ◽  
Steel Ladle ◽  
Recovery Coefficient ◽  
Cored Wire ◽  
Wire Feeding ◽  
Cored Wires

Metal processing in ladle by calcium-containing cored wires is one of the most spread methods of ladle treatment and modifying. Results of analysis of efficiency induces of existing cored wires application depending on their diameter, wall thickness and filling coefficient presented. It was shown that the basic efficiency index of a cored wire application – recovery coefficient – depending on wire quality (homogeneity of filling by calcium along the wire length), wire grade, conditions of its injection into liquid steel and other parameters can vary within a range from 50 to 95%. Reasons of unsatisfactory calcium recovery at usage of calcium-containing wires of 14–15 mm diameter with steel shell 0.4 mm thick and filling of mechanical mixture of steel shots and metallic calcium in various proportions was considered. Advantages of the modern calcium-containing cored wire with thicker wall were highlighted, including their higher wire rigidity and stability of its supply by a wire feeder into liquid steel. It was established that calcium content in a cored wire at the level of 100 g/m was the most effective composition. It was noted that increase of speed of cored wire feeding into steel will result in an increase of calcium recovery and in a decrease of probability of metal splashing out the steel ladle.

Influence of the Cobalt Additive on the Flux Cored Wire of System Fe-C-Si-Mn-Cr-Ni-Mo-V

2017 ◽  
Vol 736 ◽  
pp. 63-67 ◽  
Author(s):  
I.V. Osetkovskiy ◽  
N.A. Kozyrev ◽  
A.I. Gusev ◽  
O.A. Kozyreva ◽  
R.A. Gizatulin ◽  
...  
Keyword(s):  
Aluminum Production ◽  
Powder Materials ◽  
Gas Purification ◽  
Cored Wire ◽  
Shock Loads ◽  
Laboratory Conditions ◽  
Cored Wires ◽  
Wire System

Studied the effect of the introduction of cobalt into the charge powder fused wire system Fe-C-Si-Mn-Cr-Ni-Mo-V, used in cladding assemblies and equipment parts and mechanisms operating under abrasive and abrasive shock loads., the samples cored wires were manufactured in the laboratory conditions using appropriate powder materials and as a carbonfluoride contained material were used the dust from gas purification of aluminum production.

Quality of Metal Deposited Flux Cored Wire with the System Fe-C-Si-Mn-Cr-Mo-Ni-V-Co

2017 ◽  
Vol 736 ◽  
pp. 23-28 ◽  
Author(s):  
A.I. Gusev ◽  
N.A. Kozyrev ◽  
I.V. Osetkovskiy ◽  
O.A. Kozyreva ◽  
D.V. Valuev
Keyword(s):  
Aluminum Production ◽  
Powder Materials ◽  
Gas Purification ◽  
Cored Wire ◽  
Shock Loads ◽  
Laboratory Conditions ◽  
Cored Wires ◽  
Wire System

Studied the effect of the introduction of vanadium and cobalt into the charge powder fused wire system Fe-C-Si-Mn-Cr-Ni-Mo-V, used in cladding assemblies and equipment parts and mechanisms operating under abrasive and abrasive shock loads. the cored wires samples were manufactured in the laboratory conditions and using appropriate powder materials and as a carbonfluoride contained material were used the dust from gas purification of aluminum production.

scholarly journals Influence of Laser Cladding Parameters on Microstructure, Microhardness, Chemical Composition, Wear and Corrosion Resistance of Fe–B Composite Coatings Reinforced with B4C and Si Particles

Coatings ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 809 ◽  
Author(s):  
Dariusz Bartkowski ◽  
Aneta Bartkowska ◽  
Adam Piasecki ◽  
Peter Jurči
Keyword(s):  
Wear Resistance ◽  
Corrosion Resistance ◽  
Chemical Composition ◽  
Laser Beam ◽  
Laser Cladding ◽  
Scanning Speed ◽  
Powder Mixtures ◽  
Wear And Corrosion ◽  
Study Results ◽  
Wear And Corrosion Resistance

The paper presents the study results of a laser cladding process of C45 steel using powder mixtures. The aim of this study was to investigate the microstructure, X-ray diffraction (XRD), chemical composition (EDS), microhardness, corrosion resistance and wear resistance of the newly obtained coatings. Modified coatings were prepared using laser cladding technology. A 1 kW continuous wave Yb:YAG disk laser with a powder feeding system was applied. Two different powder mixtures as well as various laser beam parameters were used. The first powder mixture contained Fe–B, and the second mixture was Fe–B–B4C–Si. Two values of laser beam power (600 and 800 W) and three values of scanning speed (600, 800, and 1000 mm/min) were applied during the studies. As a result of the influence of the laser beam, the zones enriched with modifying elements were obtained. Based on the results of XRD, the presence of phases derived from borides and carbides was found. In all cases analyzed, EDS studies showed that there is an increased content of boron in the dendritic areas, while there is an increased silicon content in interdendritic spaces. The addition of B4C and Si improved properties such as microhardness as well as wear and corrosion resistance. The microhardness of the coating increased from approx. 400 HV to approx. 1100 HV depending on the laser parameters used. The best corrosion resistance was obtained for the Fe–B–B4C–Si coating produced using the highest laser beam scanning speed. An improvement in wear resistance can be seen after wear tests, where the weight loss decreased from about 0.08 g to about 0.05 g.

scholarly journals Titanium effect on the microstructure and properties of the layer deposited by Fe-C-Si-Мn-Сr-Mo-Ni flux cored wire on the parts working in severe wear conditions

2021 ◽  
Vol 330 ◽  
pp. 02008
Author(s):  
Nikolay Kozyrev ◽  
Alexey Mikhno ◽  
Aleksandr Usoltsev ◽  
Natalya Kibko ◽  
Olga Kozyreva
Keyword(s):  
Structure And Properties ◽  
Cored Wire ◽  
Severe Wear ◽  
09G2s Steel ◽  
Microstructure And Properties ◽  
Silicomanganese Slag ◽  
Study Results ◽  
Cored Wires

The study results of the structure and properties of the layer deposited with flux-cored wires of the Fe-C-Si-Mn-Cr-Mo-Ni system additionally alloyed with titanium are presented. Surfacing with the investigated flux-cored wires was carried out on a substrate made of 09G2S steel using silicomanganese slag flux.

scholarly journals Effect of structure and phase content on wear resistance of the economical alloyed metastable and secondary hardening steels of Cr-Mn-Ti system

2021 ◽  
pp. 136
Author(s):  
Valeriy Bagrov
Keyword(s):  
Wear Resistance ◽  
Secondary Hardening ◽  
Relative Mass ◽  
High Concentration ◽  
Cored Wire ◽  
Wear Resistant ◽  
White Band ◽  
Manual Arc Welding ◽  
Cored Wires ◽  
Wire Filler

Despite a large number of studies in the field of assessing the causes of the formation of hot and cold cracks during surfacing of wear-resistant alloys, today the issues of working out the use of economically alloyed wear-resistant materials and the technique of their surfacing remain relevant. Goal: The purpose of this work is to study the effect of the structure and phase composition on the wear resistance of economically alloyed metastable and secondary hardening steels of the Cr-Mn-Ti system, as well as with additional alloying with Mo, B, V. Mechanized surfacing was carried out with flux cored wires AN-22 and AN-20 with the supply of a de-energized additive to the head of the weld pool, which reduces the content of sulfur and phosphorus, the specific consumption of electricity and increases the assimilation of alloying elements and the relative mass of the flux. Cladding by manual arc welding was carried out with coated electrodes with the addition of a depleted CaF2-coated flux-cored wire filler. When surfacing with a de-energized additive, the ratio of the filler to the main electrode, the relative mass was determined by β = m1 / m2 (m1, m2 are the mass of the filler and the electrode rod, respectively). Submerged arc surfacing was carried out in the following modes: IN = 300 ... 350 A, UD = 26 ... 30 V, q = 6 ... 10 kJ / cm, with manual surfacing - IN = 180 ... 220 A, UD = 25 ... Results: The studies carried out confirm the possibility of the formation of a “white band” both in alloys with a high concentration of austenitizing elements (Mn, C, Ni) and when alloying carbide-forming elements with a relatively low affinity for carbon (V, Mo). The indicators of resistance to cracking (КС, j-integral, δС), and, consequently, resistance to wear of secondary hardening steels are higher than those of metastable and tool steels.

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