Optimization of Pass Parameters on Two-Grooves Skew Rolling for Al Ball

2009 ◽  
Vol 419-420 ◽  
pp. 313-316 ◽  
Author(s):  
Xiao Min Shi ◽  
Bao Jian Wang ◽  
Zhen Hua Li

The optimization of pass parameters is an important step in skew rolling design. In order to meet the demands of secondary refining process in continuous casting, on the basis of the practical experience of two-groove skew rolling for steel ball, and by means of the theory of two-groove skew rolling design ,the optimization of two-groove pass parameter for Φ21.6 mm Aluminum ball, a kind of additive in secondary refining process, is realized. The optimized pass parameters are used in the rolling die design, and the corresponding experiments indicate that the projects of optimized pass parameters are feasible, and the efficiency of two-groove skew rolling is twice as large as that of one-groove.

2014 ◽  
Vol 898 ◽  
pp. 60-63
Author(s):  
Yu Tang

In order to improve fatigue life of wheel steel, LF-VD secondary-refining process is done with Al-deoxidation and slag of high basicity, high Al2O3 content and low oxidizing property. Inclusion content would be influenced by [Al]s, [Mg], [Ca] in molten steel. It is found that Al2O3 inclusions, which are the products of Al-deoxidation, would react with [Mg], [Ca] in molten steel to transform into CaO-MgO-Al2O3 complex inclusions, which is the key for the enhancement of fatigue performance for wheel steel.


1986 ◽  
Vol 72 (9) ◽  
pp. 1309-1315 ◽  
Author(s):  
Yasutsugu OGURA ◽  
Yoshiteru KIKUCHI ◽  
Teruyuki HASEGAWA ◽  
Kazuhiko MATSUO ◽  
Kiyomi TAGUCHI ◽  
...  

2013 ◽  
Vol 746 ◽  
pp. 501-504
Author(s):  
Tang Yu

In order to improve fatigue life of wheel steel, secondary-refining process is done with Al-deoxidation and slag of high basicity, high Al2O3 content and low oxidizing property. [M, [C content in molten steel would be influenced by slag composition. It is found that high basicity, high Al2O3 content and low oxidizing property is positive factor for proper [M, [C content in molten steel which is the key of inclusion transformation from Al2O3 to CaO-MgO-Al2O3 complex inclusion, contributing to the enhancement of fatigue performance for wheel steel.


2011 ◽  
Vol 418-420 ◽  
pp. 419-423
Author(s):  
Xing Di Yang

In order to produce low oxygen steel with high quality, converter slag-tapping, slag oxidability and oxygen activity have been analyzed. In addition, modifying and adding process of slag, control of slag oxidability and bottom argon-blowing in ladle were studied as well. On this basis, refining process which is beneficial to low oxygen steel producing with converter-continuous casting process has been developed. The results show that content of T[O] in steel is not more than 15×10-6.


2012 ◽  
Vol 217-219 ◽  
pp. 35-38 ◽  
Author(s):  
Hong Ming Wang ◽  
Pei Si Li ◽  
Gui Rong Li ◽  
Mian Zhang ◽  
Zhao Zhao ◽  
...  

The melting temperatures of CaO-(2CaO•SiO2)-B2O3-SiO2-(Al2O3) slag system were investigated. The results indicate that B2O3 has significant fluxing effect on this slag system. When the content of B2O3 is about 10% in these slag system, the mass ratios of w(CaO)/w(SiO2) and (CaO)/w(Al2O3) can be controlled in the scope of 1.5-8.0, the melting temperature of slag is still lower than 1340°C, which is suitable for steelmaking and secondary refining process. As a conclusion, when 10% B2O3 is employed as fluxing agent, a kind of CaO-based slag system with ultra-high basicity, ultra-low alumina content as well as low melting temperature can be obtained.


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