scholarly journals PROSPECTS FOR THE APPLICATION OF LASER SURFACE TECHNOLOGY FOR RESTORING ROLLERS OF CONTINUOUS CASTING MACHINES

2020 ◽  
pp. 108-118
Author(s):  
A. Makarov ◽  
A. Kudryashov ◽  
S. Nevezhin ◽  
A. Gerasimov ◽  
A. Vladimirov ◽  
...  
Keyword(s):  
Continuous Casting ◽  
Electric Arc ◽  
Alloyed Powder ◽  
Powder Wire ◽  
Properties Of Coatings ◽  
Laboratory Equipment ◽  
Laser Surfacing ◽  
Layer Structures ◽  
Formation Conditions ◽  
20X13 Steel

The article considers the possibility of applying laser cladding technology to restore the rollers of continuous casting machines. Effective methods of restorative surfacing of rollers of continuous casting machines are briefly presented. The paper describes the process of forming coatings for rollers using laser and electric arc surfacing methods. Laboratory equipment for preparing experimental samples for metallographic studies is described. The method of preparation of laboratory samples of coatings obtained by laser and electric arc surfacing is described. Electric arc surfacing of 20X13 steel samples is performed with PP-NP-25X5FMS powder wire. Laser surfacing of samples made of 20X13 steel is performed with an economically alloyed powder based on Fe-Co-Cr-Mo iron. The structure and composition of surfaced coatings by electric arc and laser surfacing methods for rollers of continuous casting machines are studied. The mechanical properties of the applied coatings for the rollers are studied. Tribological characteristics of coatings applied by electric arc and laser surfacing methods are investigated. To evaluate the properties of coatings, a structural and phase analysis is performed, and the friction coefficients and wear rate are determined. Graphic images of the deposited layer structures are presented. The dependences of the friction coefficient of the deposited layers are presented and their differences for each of the surfacing methods are analyzed. An explanation of the differences in the properties of coatings based on the analysis of their formation conditions is offered. The efficiency of using the laser surfacing method for restoring parts of metallurgical equipment is evaluated.

Process Practice of Refining for Free Cutting Austenite Stainless Steel

2013 ◽  
Vol 325-326 ◽  
pp. 94-96
Author(s):  
Yi Min Wang ◽  
Xian Cai Wang ◽  
Li Min Wen
Keyword(s):  
Stainless Steel ◽  
Continuous Casting ◽  
Continuous Casting Machine ◽  
Casting Machine ◽  
Electric Arc ◽  
Ladle Furnace ◽  
Arc Furnace ◽  
Refining Slag ◽  
Austenite Stainless Steel ◽  
Argon Oxygen Decarburization

FreeCutting Austenite Stainless Steel 303CuS2(%:≤0.08C,8.00~10.00Ni, 17.00~19.00Cr, 1.50~3.50Cu,0.24~0.35S) is smelted by 60t Electric Arc Furnace~60t Argon Oxygen Decarburization~60t Ladle Furnace~3 Flow continuous casting machine. With decreasing basicity of AOD refining slag from 2.0 to 1.6, controlling AOD tapping slag amount and tapping temperature, the [S] in AOD tapping steel increases to 0.008%~0.012% from original 0.004%~0.006%, after feeding S-wire containing 50% S and controlling the end temperature, the yield of S increases to 60%~70% from original 30%~50%, the qualified ratio of raises from 85% to 100%.

scholarly journals Improving The Technology Of Continuous Casting Of Steel Castings

2021 ◽  
Vol 03 (04) ◽  
pp. 108-117
Author(s):  
Furkat Odilov ◽  
◽  
Farrukhjon Abdullaev ◽  
Keyword(s):  
Cost Effectiveness ◽  
Continuous Casting ◽  
Electric Arc ◽  
Continuous Casting Of Steel ◽  
Electric Arc Furnaces ◽  
Arc Furnaces ◽  
Steel Castings ◽  
Cast Products

This article describes the quality and cost-effectiveness of converting steels by melting them in electric arc furnaces. In addition, the technology of continuous casting of cast products in the furnace with the help of ferroalloys, followed by various equipment.

scholarly journals Oxide-Inclusion Evolution in the Steelmaking Process of 304L Stainless Steel for Nuclear Power

Metals ◽  
2019 ◽  
Vol 9 (2) ◽  
pp. 257 ◽  
Author(s):  
Xingrun Chen ◽  
Guoguang Cheng ◽  
Yuyang Hou ◽  
Jingyu Li
Keyword(s):  
Stainless Steel ◽  
Continuous Casting ◽  
Nuclear Power ◽  
Oxide Inclusion ◽  
Electric Arc ◽  
304L Stainless Steel ◽  
Arc Furnace ◽  
Continuous Casting Tundish ◽  
Argon Oxygen Decarburization ◽  
Lf Refining

The inclusions formed in 304L stainless steel for nuclear power produced by the electric arc furnace (EAF)-argon oxygen decarburization furnace (AOD)-ladle furnace (LF)-continuous casting (CC) process were investigated by thermodynamics calculations and experimental results. The results showed that the inclusions after AOD and LF refining were almost the same as the slag composition. The types of inclusions (sizes larger than 5 µm) were mainly CaSiO3 with high SiO2 content at the end of AOD, and Ca2SiO4 with high CaO content at the end of LF. The Al2O3 and MgO content of inclusions increased from AOD to LF. There were two types of inclusions in the tundish: CaO-SiO2-Al2O3-MgO and CaO-SiO2-Al2O3-MgO-MnO inclusions with MgO·Al2O3 spinel precipitation. The content of Al2O3 in the inclusions increased rapidly with the decrease in temperature from the end of LF refining to continuous casting, as calculated using FactSage6.3 software. The rapid increase of Al2O3 in the CaO-SiO2-Al2O3-MgO-(MnO) inclusions promoted the precipitation of MgO·Al2O3 spinel in continuous casting tundish, suggesting mechanisms for the formation of inclusions in the 304L stainless steel.

Physico-mechanical properties of coatings produced by electric arc metallising with flux-cored wires

2017 ◽  
Vol 31 (9) ◽  
pp. 729-732 ◽  
Author(s):  
V. P. Lyalyakin ◽  
V. P. Murzaev ◽  
R. Yu. Solovev ◽  
D. B. Slinko
Keyword(s):  
Mechanical Properties ◽  
Electric Arc ◽  
Properties Of Coatings ◽  
Cored Wires

scholarly journals STRUCTURE AND PROPERTIES OF COATINGS ON PRODUCTS MADE OF STEEL 09G2S, STEEL 3 AND STEEL 12H18N10T

2020 ◽  
Vol 2020 (1) ◽  
pp. 11-17
Author(s):  
Yuriy Saraev ◽  
Valeriy Bezborodov ◽  
Marina Perovskaya ◽  
Vyacheslav Semenchuk
Keyword(s):  
Physical Stress ◽  
Electric Arc ◽  
Structure And Properties ◽  
Coating Properties ◽  
Properties Of Coatings ◽  
Stress Strain ◽  
Steel 09G2s ◽  
09G2s Steel ◽  
Alloy Steels

The investigation of the mode impact of electric arc surfacing with electrode EN-60M upon coating properties of non-alloy, low-alloy and alloy steels (steel 3, steel 09G2S, steel 12H18N10T) is carried out. As a result of this there is studied the electric arc impact upon structure, physical stress-strain and operation properties of coatings built up with electrode EN-60M. It is defined that the modification in progress with electric arc impact allows milling the structure formed of built up coatings and increasing its uniformity.

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