Supplemental Information to “Method for Improving Transverse Wall Thickness Precision of Seamless Steel Tube Based on Tube Rotation” [J. Iron Steel Res. Int. 22 (2015) No. 10, 924-930]

2015 ◽  
Vol 22 (12) ◽  
pp. 1174 ◽  
Author(s):  
Yong-zheng JIANG ◽  
Hua-ping TANG
Keyword(s):  
Wall Thickness ◽  
Steel Tube ◽  
Transverse Wall ◽  
Seamless Steel Tube ◽  
Seamless Steel

Influence of Roll Speed Schedule on Transverse Wall Thickness Evenness of Shell Elongated by Mandrel Mill

2010 ◽  
Vol 654-656 ◽  
pp. 1311-1314 ◽  
Author(s):  
Sheng Zhi Li ◽  
Zhi Chao Zhang ◽  
Hai Yan Bao ◽  
Zhi Yang Zhou
Keyword(s):  
Wall Thickness ◽  
Rolling Process ◽  
Steel Tube ◽  
Transverse Wall ◽  
Data Reliability ◽  
Continuous Rolling ◽  
Roll Speed ◽  
Seamless Steel Tube ◽  
The Relationship ◽  
Seamless Steel

The seamless steel tube continuous rolling process with 8-stand full-floating mandrel is simulated with the aid of commercial FE code MSC. SuperForm. The relationship is analyzed between the distribution of the transverse wall-thickness and the speed schedule of the rollers. The result shows that the transverse evenness of the wall thickness of the tubes can be enhanced by optimizing the speed schedule. Furthermore, by adopting meliorated method to measure the wall-thickness of the shell, the error is reduced while data reliability is increased. When using the existing equipments (mandrel mill), it is an effective way to improve the transverse wall-thickness accuracy of the shell tube by adjusting the speed schedule. Compared with present roll speed schedule, the transverse wall-thickness accuracy can be increased by 10% for the rolling of elongated shell with 152.5mm in OD and 6mm in wall thickness tube under the 3# speed schedule put forward in this paper.

Study on Wall Thickness Eccentricity of Seamless Steel Tube

2010 ◽  
Vol 148-149 ◽  
pp. 1071-1074 ◽  
Author(s):  
Qing Gong Lv ◽  
Long Zhou Peng ◽  
Jing Qing Zhu
Keyword(s):  
Cross Section ◽  
Wall Thickness ◽  
Steel Tube ◽  
Steel Tubes ◽  
Increase Wall Thickness ◽  
Factors Influencing ◽  
Feed Angle ◽  
Seamless Steel Tube ◽  
Seamless Steel Tubes ◽  
Seamless Steel

Wall thickness is measured by a micrometer on shells after piercing, hollows after rolling and tubes after stretch reducing in an Assel production line for seamless steel tubes. The characteristics of wall thickness eccentricity are exhibited, and the heredity and origin of wall thickness eccentricity are analyzed. Finally, the factors influencing wall thickness eccentricity are discussed. The results show that: (1) Wall thickness eccentricity originates from temperature eccentricity in cross section of round billets, comes into being on shells in piercing process, and is passed down to hollows and finally to tubes; (2) Bigger feed angle of piercing, smaller plug diameter and less stability of plug bar will increase wall thickness eccentricity, while complying to the influence of temperature eccentricity on round billets.

Stretch reduction of seamless steel tube by skew rolling and its numerical simulation

2016 ◽  
Vol 113 (3) ◽  
pp. 307 ◽  
Author(s):  
Chunjiang Zhao ◽  
Yongfeng Liu ◽  
Lei Bai ◽  
Nan Wang ◽  
Xin Gao ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Steel Tube ◽  
Seamless Steel Tube ◽  
Skew Rolling ◽  
Seamless Steel

scholarly journals Development of non-decarburized Repetitive Heat Treatment for A Ball Bearing Seamless Steel Tube.

Materia Japan ◽  
1994 ◽  
Vol 33 (5) ◽  
pp. 647-649
Author(s):  
Yasutaka Okada ◽  
Nobuo Otsuka ◽  
Takashi Morikawa ◽  
Yasuhide Fujioka ◽  
Seiji Tanimoto
Keyword(s):  
Heat Treatment ◽  
Ball Bearing ◽  
Steel Tube ◽  
Seamless Steel Tube ◽  
Seamless Steel
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