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 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.

Study on the Continuous Casting Production of 823 Steel

2011 ◽  
Vol 201-203 ◽  
pp. 1732-1735
Author(s):  
Cheng Wu Du ◽  
Li Ying Li ◽  
Di Wu ◽  
Hai Bin Wang ◽  
Qi Hua Liang
Keyword(s):  
Nitrogen Fixation ◽  
Continuous Casting ◽  
Aluminum Content ◽  
Value Added ◽  
Electric Arc ◽  
Ladle Furnace ◽  
Arc Furnace ◽  
Mould Powder ◽  
Water Rate ◽  
Casting Production

For producing high-value-added 823 shells steel used in military products ship, 50t electric arc furnace (EAF)-ladle furnace (LF)-continuous casting (CC) process was used in the test production. The results show that it is feasible to product the qualified 823 shells steel by controlling the final carbon and aluminum content, final deoxidization nitrogen fixation without titanium, controlling the superheat of the liquid steel in the tundish, spray water rate of mould, viscosity of mould powder and protection casting during the CC process.

scholarly journals Briquette smelting in electric arc furnace to recycle wastes from stainless steel production

2015 ◽  
Vol 22 (S1) ◽  
pp. 10-16 ◽  
Author(s):  
Qi-xing Yang ◽  
An-jun Xu ◽  
Peng Xue ◽  
Dong-feng He ◽  
Jian-li Li ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Steel Production ◽  
Electric Arc Furnace ◽  
Electric Arc ◽  
Arc Furnace ◽  
Stainless Steel Production

scholarly journals Investigation of internal defects formation reasons in copper billet obtained at rotary continuous casting machine (CCM)

2020 ◽  
Vol 28 (1) ◽  
pp. 48-54
Author(s):  
A.N. Smirnov ◽  
◽  
V.E. Ukhin ◽  
A.P. Verzilov ◽  
Ali Naseri ◽  
...  
Keyword(s):  
Continuous Casting ◽  
Continuous Casting Machine ◽  
Casting Machine ◽  
Internal Defects

Sensorless electric drive of the mixture supply system in the mold of the continuous steel casting installation

2021 ◽  
pp. 16-21
Author(s):  
K. V. Litsin ◽  
D. M. Utyamishev
Keyword(s):  
Continuous Casting ◽  
Electric Drive ◽  
Continuous Casting Machine ◽  
Casting Machine ◽  
Steel Production ◽  
Angular Speed ◽  
Quality Level ◽  
Actual Direction ◽  
Vector Control System ◽  
The Cost

The system of automatic feeding of the slag-forming mixture into the mold of the continuous casting machine was investigated in this article. The necessity of using a slag-forming mixture in the process of steel production has been substantiated. The proofs are given that the consumption of the slag-forming mixture significantly affects the cost of the final product. The quality level of the final product depends on the uniformity and consistency of the mixture supply to the crystallizer. Therefore, the actual direction is the automation of the process of feeding the slag-forming mixture into the mold of the continuous casting machine. The description of the developed automatic installation, which implements the supply of slag-forming mixture, is presented. The necessity of using a sensorless electric drive for moving the trolley has been substantiated. A simulation model of a bogie electric drive with a vector control system based on sensorless determination of the angular speed of the engine has been developed. The description of the method for determining the angular speed of the motor based on the known values of phase voltages is given. The simulation of the developed electric drive system in the Matlab Simulink program, confirming the adequacy of the developed system. The introduction of a sensorless electric drive into the system for feeding the mixture into the mold of the continuous casting machine will increase the reliability of the entire system and reduce its weight and dimensions.

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