Mechanical Analysis on the Inner Surface Crack of Modified 9Cr-1Mo Seamless Steel Tubes Rolled by Mandrel Mill

Sheng Zhi Li; Jie Xu; Yuan De Yin; Hui Chao Su

doi:10.4028/www.scientific.net/AMR.97-101.3070

Paper Titles

Optimization of Surface Roughness Based on Multi-Linear Regression Model and Genetic Algorithm
p.3050

A New Ultraprecision Machining Method with Softness Abrasive Flow Based on Discrete Phase Model
p.3055

Research on Precision Forming Technology of Car Steering Knuckle
p.3060

Finite Element Analysis on the Roll Milling Process of Twisted Oblate Tube
p.3065

Mechanical Analysis on the Inner Surface Crack of Modified 9Cr-1Mo Seamless Steel Tubes Rolled by Mandrel Mill
p.3070

Finite Element Simulation of the Effects of Mould Angle on the Equal Channel Angular Pressing for Al-Zn-Mg-Cu Alloy
p.3075

Simulation of Void Defect Evolvement during the Forging of Steel Ingot
p.3079

Research on the Temperature Properties of Plate during the Laminar Cooling Process
p.3085

Research and Improvement on the Rolling Force Model of Plate
p.3091

HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 97-101Mechanical Analysis on the Inner Surface Crack of...

Mechanical Analysis on the Inner Surface Crack of Modified 9Cr-1Mo Seamless Steel Tubes Rolled by Mandrel Mill

Abstract:

The inner surface crack (ISC) defect easily occurs in seamless modified 9Cr-1Mo steel tubes rolled by the mandrel mill with high production efficiency. The reason for the formation of the ISC lies in both the properties of deformed material and rolling conditions. With the aid of commercial FE code MSC.SuperForm, the rolling process of modified 9Cr-1Mo seamless steel tube produced by the Mandrel Mill of Bao Steel in China was simulated, focusing on mechanical analysis of deformed metal. It was found from the simulation that the metal on the inner surface of the tube, in the position of 0 or 90 of the roll pass, experiences strong tensile stresses, especially the circumferential stress, which is closely related .to the strain behavior governed by the two-high pass caliber of the mandrel mill. Therefore an optimal design of the roll pass can be realized to decrease the tensile stress so as to relax the tendency to the ISC, which has been confirmed by the tests in Steel Tube & Pipe Company of Bao Steel.

You might also be interested in these eBooks

View Preview

Info:

Periodical:

Advanced Materials Research (Volumes 97-101)

Pages:

3070-3074

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.97-101.3070

Citation:

Cite this paper

Online since:

March 2010

Authors:

Sheng Zhi Li, Jie Xu, Yuan De Yin, Hui Chao Su

Keywords:

Mandrel Mill, Mechanical Analysis, Modified 9Cr-1Mo, Numerical Simulation, Roll Pass Caliber, Seamless Steel Tube

Export:

RIS, BibTeX

Price:

Permissions CCC:

Request Permissions

Permissions PLS:

Request Permissions

Сopyright:

Citation:

References

[1] IN. Morioka, H. Oka and T. Simizu: Kawasaki Steel Technical Report, Vol. 38 (1998), p.38.

Google Scholar

[2] T. Sawki, K. Kobayashi and T. Yamaura: Kawasaki Steel Technical Report, Vol. 25(1991), p.78.

Google Scholar

[3] J. Xu. Study on the Mechanism of Inner Surface Crack Occurrence of T91 Steel Tubes Rolled by Mandrel Mill and Its Application. Master's thesis, Anhui University of Technology, Maanshan, China (2007) (In Chinese).

Google Scholar

[4] G. Sola, M. Vacance, E, Massoni and J.L. Chenot: Materials Processing Technology Vol. 45(1994), p.187.

Google Scholar

[5] S.Z. Li, Y.D. Yin, J. Xu, J. G Xue, J.M. Zheng and F. Pan, in: Proceedings of the 3rd International Conference on Advanced Structural Steels (Aug. 21-24, Gyeongju, Korea, 2006), p.439.

Google Scholar