Effect of RH pure circulation on the cleanness of titanium stabilized interstitial-free(Ti-IF) steel

WANG Min; BAO Yan-ping; CUI Heng; WU Wei-shuang; WU Hua-jie; CHEN Bin; JI Chen-xi

doi:10.13374/j.issn1001-053x.2011.12.016

Volume 33 Issue 12

Jul. 2021

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WANG Min, BAO Yan-ping, CUI Heng, WU Wei-shuang, WU Hua-jie, CHEN Bin, JI Chen-xi. Effect of RH pure circulation on the cleanness of titanium stabilized interstitial-free(Ti-IF) steel[J]. Chinese Journal of Engineering, 2011, 33(12): 1448-1452. doi: 10.13374/j.issn1001-053x.2011.12.016

Citation:

WANG Min, BAO Yan-ping, CUI Heng, WU Wei-shuang, WU Hua-jie, CHEN Bin, JI Chen-xi. Effect of RH pure circulation on the cleanness of titanium stabilized interstitial-free(Ti-IF) steel[J]. Chinese Journal of Engineering, 2011, 33(12): 1448-1452. doi: 10.13374/j.issn1001-053x.2011.12.016

Citation:

WANG Min, BAO Yan-ping, CUI Heng, WU Wei-shuang, WU Hua-jie, CHEN Bin, JI Chen-xi. Effect of RH pure circulation on the cleanness of titanium stabilized interstitial-free(Ti-IF) steel[J]. Chinese Journal of Engineering, 2011, 33(12): 1448-1452. doi: 10.13374/j.issn1001-053x.2011.12.016

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Effect of RH pure circulation on the cleanness of titanium stabilized interstitial-free(Ti-IF) steel

doi: 10.13374/j.issn1001-053x.2011.12.016

1. National Engineering Research Center of Flat Rolling Equipment, University of Science and Technology Beijing, Beijing 100083, China;
2. School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China;
3. SHOUGANG Technology Research Center, SHOUGANG Corporation, Beijing 100087, China

Received Date: 2010-10-08
Available Online: 2021-07-30

Abstract

Abstract

The number of Al type inclusions was analyzed by original position statistic distribution analysis(OPA) and the three-dimensional morphologies of inclusions were observed by a special depth erosion method.Total oxygen and nitrogen during the refining process were determined.Cleanness changes of the steel were evaluated by prolonging the RH pure circulation time.It is shown that the total oxygen can be reduced to 30×10^-6 when the RH pure circulation time is 8 to 10min after alloying;the scrap steel should be adjusted before adding Al or titanium alloys,or it can influence the cleanness of the steel.The number of inclusions reaches the maximum value of 7.02mm^-2 after adding Al within 5min,with the main inclusions of cluster Al₂O₃,and the size and number of inclusions decrease significantly during RH pure circulation after alloying.
- IF steel,
- steelmaking,
- inclusions,
- alumina,
- cleanliness