Industrial Trial Production of X70 Pipeline Steel under Ultra Fast Cooling Conditions

Abstract:

A successful ultra fast cooling (UFC) technology has been applied to the plate rolling production line in Shouqin Metal Materials Co.Ltd.. Industrial trials are reported for the production of X70 pipeline steels (about 70000 t) under UFC conditions. Pipeline steels with reasonably good properties have been produced on an industrial scale. UFC improves the temperature uniformity, the mechanical properties and the plate profile of X70 pipeline steel. The impact values of X70 pipeline steel at UFC mode exceed the standard requirements of X80 pipeline steel. The productivity is enhanced because cutting quantity of head and tail of the plate is reduced. The enhancement of control accuracy of the red back temperatures is favorable for industrial production of X70 pipeline steel. The reduced production of the steel-making has been industrialized achieved, since a new composition was designed by reducing the vanadium content to less than 0.045wt.%.

• Periodical: Applied Mechanics and Materials (Volumes 121-126)
• Pages: 3340-3344
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.121-126.3340
• Online since: October 2011
• Authors: Yong Tian, Shuai Tang, Guo Dong Wang, Pu Wang
• Keywords: NG-TMCP, Reduced Production, X70 Pipeline Steel

References

[1] Matrosov M Y,. Éfron L I, and Il'inskii V. I, et al. Use of Accelerated Cooling to Improve the Mechanical and Processing Properties of Rolled Plates Used to Make Large-diameter Gas-line Pipe [J]. Metallurgist, 2005, 49 (5-6): 220-229.

DOI: 10.1007/s11015-005-0082-2

[2] Schambron T, Phillips A W, and O'brien D M, et al. Thermomechanical Processing of Pipeline Steels with a Reduced Mn Content [J]. ISIJ International, 2009, 49 (2): 284-292.

DOI: 10.2355/isijinternational.49.284

[3] Seung Y H, Sang Y S, Sunghak L, et al. Effects of Cooling Conditions on Tensile and Charpy Impact Properties of API X80 Linepipe Steels [J]. Metallurgical and Materials Transactions A, 2010, 41A (2): 329-340.

DOI: 10.1007/s11661-009-0135-4

[4] Wang Guo-dong. New Generation TMCP and Innovative Hot Rolling Process[J]. Journal of Northeastern University(Natural Science), 2009, 30(7): 913-922.

[5] Mendoza R, Alanis M, and Perez R, et al. On the Processing of Fe-C-Mn-Nb Steels to Produce Plates for Pipelines with Sour Gas Resistance [J]. Materials Science and Engineering A, 2002, 337 (1-2): 115-120.

DOI: 10.1016/s0921-5093(02)00009-6