Numerical Simulation of Nozzle Clogging of Ferritic Stainless Steel

2011 ◽  
Vol 284-286 ◽  
pp. 1306-1310
Author(s):  
Cai Jun Zhang ◽  
Yan Lei Bi ◽  
Hong Jie Zhang ◽  
Jie Yang
Keyword(s):  
Stainless Steel ◽  
Ferritic Stainless Steel ◽  
Three Dimensional ◽  
Surface Flow ◽  
Simulation Software ◽  
Ideal Condition ◽  
Asymmetric Distribution ◽  
Nozzle Clogging ◽  
Lower Temperature ◽  
Steel Flow

According to actual circumstance of Tang Shan ferritic stainless Steel Company, making use of some scene technology parameter and referring a lot of document data, the three-dimensional mathematical model which coupled the molten steel flow with heat transfer is established by adopting the simulation software FLUENT. The result shows: The surface flow velocity and turbulent kinetic energy in liquid surface centerline is appear symmetrical around the two side in ideal condition without the nozzle clogging, but the nozzle clogging show asymmetric distribution, different place and size clogging appear different flow field and temperature. The nozzle clogging of surface temperature and mold lower temperature are higher than the sides without the nozzle clogging. Nozzle clogging is disadvantage of the removal inclusion.

Three-dimensional numerical and experimental investigation on friction stir welding processes of ferritic stainless steel

2013 ◽  
Vol 61 (7) ◽  
pp. 2649-2661 ◽  
Author(s):  
Hoon-Hwe Cho ◽  
Sung-Tae Hong ◽  
Jae-Hun Roh ◽  
Hyun-Sik Choi ◽  
Suk Hoon Kang ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
Stainless Steel ◽  
Friction Stir Welding ◽  
Ferritic Stainless Steel ◽  
Three Dimensional ◽  
Friction Stir ◽  
Welding Processes

scholarly journals Application of the Symmetric Model to the Design Optimization of Fan Outlet Grills

Symmetry ◽  
2019 ◽  
Vol 11 (8) ◽  
pp. 959 ◽  
Author(s):  
Lin ◽  
Cheng
Keyword(s):  
Wind Speed ◽  
Flow Field ◽  
Velocity Distribution ◽  
Simulation Analysis ◽  
Three Dimensional ◽  
Surface Flow ◽  
Simulation Software ◽  
Experimental Results ◽  
Symmetric Model ◽  
Airflow Rate

In this study, different designs of the opening pattern of computer fan grills were investigated. The objective of this study was to propose a simulation analysis and compare it to the experimental results for a set of optimized fan designs. The FLUENT computational fluid dynamics (CFD) simulation software was used to analyze the fan blade flow. The experimental results obtained by the simulation analysis of the optimized fan designs were analyzed and compared. The effect of different opening pattern designs on the resulting airflow rate was investigated. Six types of fans with different grills were analyzed. The airflow velocity distribution in the simulated flow channel indicated that the wind speed efficiency of the fan and its influence were comparable with the experimental model. The air was forced by the fan into the air duct. The flow path was separately measured by analog instruments. The three-dimensional flow field was determined by performing a wind speed comparison on nine planes containing the mainstream velocity vector. Moreover, the three-dimensional curved surface flow field at the outlet position and the highest fan rotation speed were investigated. The air velocity distribution at the inlet and the outlet of the fan indicated that among the air outlet opening designs, the honeycomb shaped air outlet displayed the optimal performance by investigating the fan characteristics and the estimated wind speed efficiency. These optimized designs were the most ideal configurations to compare these results. The air flow rate was evenly distributed at the fan inlet.

scholarly journals Evolution of the Non-metallic Inclusions Influenced by Slag-Metal Reactions in Ti-Containing Ferritic Stainless Steel

2021 ◽  
Author(s):  
Yong Wang ◽  
Jin-Hyung Cho ◽  
Tae-Su Jeong ◽  
Andrey Karasev ◽  
Wangzhong Mu ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Kinetic Analysis ◽  
Ferritic Stainless Steel ◽  
Three Dimensional ◽  
Slag Refining ◽  
Rate Determining Step ◽  
Slag Metal Reactions ◽  
Steel Cleanliness ◽  
Si Content ◽  
Ti Content

AbstractLaboratory experiment and thermodynamic calculation for the Ti-containing 24 mass pct Cr ferritic stainless steel with a CaO-SiO2-Al2O3-MgO system slag were performed to investigate the effect of slag addition on the inclusion characteristics in molten steel. The morphology, composition, and size evolution of inclusions in steel samples were analyzed in three-dimensional by the electrolytic extraction method and in two-dimensional by the automatic analysis method. The results showed that the Ti content significantly decreased after the slag addition. However, the change of the Si content showed an opposite tendency. The decrease of the Ti content in steel was due to the reduction of SiO2 and Al2O3 in the slag by dissolved Ti in steel. An increase of the TiO2 content in the slag can decrease the Ti loss in steel based on the slag-steel kinetic analysis. The total O content in the steel melt decreased from 62 to 26 ppm, and the steel cleanliness was improved, since the number density of inclusions decreased after the slag refining. The results of a kinetic analysis showed that the rate-determining step of the oxidation of Ti in the steel and the reduction of SiO2 in the slag were the mass transfer on the slag side. In addition, high Ti2O3-containing inclusions were found to be transformed to Cr2O3-Ti2O3-Al2O3 and Cr2O3-Ti2O3-SiO2 system inclusions after the slag addition. The Al2O3 contents in inclusions increased while the Ti2O3 contents decreased with time. However, there were some amount of high melting point inclusions with high Al2O3 content, which were not what we expected. When plotted on logarcxithmic scales, the mole ratio $$X_{{{\text{Al}}_{2} {\text{O}}_{3} }} /(X_{{{\text{Ti}}_2 {\text{O}}_{3} }} \cdot X_{{{\text{Cr}}_{2} {\text{O}}_{3} }} )$$ X Al 2 O 3 / ( X Ti 2 O 3 · X Cr 2 O 3 ) values of the inclusions were expressed as a linear function of the $$a_{\text{Al}}^{2} /(a_{Ti}^{2} \cdot a_{\text{Cr}}^{2} \cdot a_{\text{O}}^{3} )$$ a Al 2 / ( a Ti 2 · a Cr 2 · a O 3 ) values of the steel melts with a slope of unity, which was theoretically expected.

Microstructures and Hardness of CO2 Laser Welds in 409L Ferritic Stainless Steel

2010 ◽  
Vol 48 (04) ◽  
pp. 297-304 ◽  
Author(s):  
Jong Pan Kong ◽  
Tae Jun Park ◽  
Hye Sung Na ◽  
Jeong Kil Kim ◽  
Sang Ho Uhm ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Ferritic Stainless Steel ◽  
Co2 Laser ◽  
Laser Welds

Effect of the Heat Input on the Tensile Properties in Arc Brazing of Ferritic Stainless Steel using Cu-Si Insert Alloy

2010 ◽  
Vol 48 (04) ◽  
pp. 289-296 ◽  
Author(s):  
Myung-Bok Kim ◽  
Sang-Ju Kim ◽  
Bong-Keun Lee ◽  
Xinjian Yuan ◽  
Byoung-Hyun Yoon ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Tensile Properties ◽  
Ferritic Stainless Steel ◽  
Heat Input

ATI 409HP

Alloy Digest ◽  
2013 ◽  
Vol 62 (2) ◽  
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
High Temperature ◽  
Carbon Steel ◽  
Physical Properties ◽  
Tensile Properties ◽  
Ferritic Stainless Steel ◽  
Temperature Performance ◽  
End Use ◽  
Oxidation And Corrosion

Abstract ATI 409HP (UNS S40900) ferritic stainless steel was introduced by ATI Allegheny Ludlum to provide improved oxidation and corrosion resistance for automotive exhaust systems in comparison to carbon steel. The alloy was designated "MF-1", indicating its end use: automotive mufflers. The good fabricability of this alloy, combined with its basic corrosion resistance and economy have significantly broadened the utility of ATI 409HP stainless steel. ATI 409HP consists of four grades: UNS S40900, S40910, S40920, and S40930. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on high temperature performance and corrosion resistance as well as forming, machining, and joining. Filing Code: SS-1135. Producer or source: Allegheny Technologies Inc..

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