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Abstract

The phase transformation points of a medium carbon V - Ti - N microalloyed steel were determined, as were the continuous cooling transformation curves of austenite heated at 1100 ° C without deformation and heated at 1200 ° C with two pass deformation. The data have been further used to analyse the real production scheme of N80 grade hot rolled non-quenched/tempered seamless tubes. The results have showed clearly that the commonly used ‘in line normalisation’ is not always necessary in the non-quenched/tempered production process of N80 grade hot rolled seamless oil well tubes. The above viewpoint has been further demonstrated by the microstructural examination of specimens sampled from industrial production.

Keywords

PHASE TRANSFORMATIONS MICROALLOYED STEEL HOT ROLLING SEAMLESS TUBES

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References

MEKKAWY

M. F.

, EL-FAWAKHRY

K. A.

, MISHREKY

M. L.

and EISSA

M. M.

: Scand. J. Metall., 1990, 19, 245–256.

LANGNEBORG

, SIWEKI

, ZAJAC

and HUTCHINSON

: Scand. J. Metall., 1999,28, 186–241.

MATLOCK

D. K.

, KRAUSS

and SPEER

J. G.

: J. Mater. Process. TechnoL, 2001, 117, 324–328.

ZAJAC

and SIWECKI

: ISIJ Int., 1998, 10, 1130–1139.

, CROWTHER

D. N.

, MITCHELL

P. S.

and BAKER

T. N.

: lilt Symp. on ‘Vanadium application technology’, Beijing, China, September 2001, 83–98.

THOMPSON

S. W.

and KRAUSS

: Metall. Mater. Trans. A, 1989, 20A, 2279–2288.

CABRERA

J. M.

, ALOMAR

and PRADO

J. M.

: Z Metallkd., 1998, 1,47–58.

‘Consultation report for iron and steel materials’, 111-129; 2000, Beijing, Metallurgical Industry Press.

, ZHANG

and ZHANG

: Steel Tube, 2000,29, (1), 10-14 (in Chinese).

10.

REN

, MA

and C. LIU et al.: Iron and Steel, 2002,37, (1), 36-39 (in Chinese).

11.

V. ru and G. LIU: ‘Stereology: principle and application of microstructure quantitative analysis’ (in Chinese), 35-45; 1989, Beijing, Metallurgical Industry Press.

12.

ZHONG

, LIU

and LIU

: Iron and Steel, 2003,38, (2), 42-45 (in Chinese).

13.

WANG

, and WEI

: ‘Controlled rolling and controlled cooling of steel’ (in Chinese); 224-226; 1995, Beijing, Metallurgical Industry Press.

14.

LIU

et al.: Met. Heat Treat., 2003,4, 30-32 (in Chinese).

Transformation characteristics of medium carbon V – Ti – N microalloyed steel for non-quenched/tempered oil well tubes

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