Sage Journals: Discover world-class research

Abstract

Hot forged plates of two microalloyed grades of 1541 steel have been produced by thermomechanical (TMP) forging schedules. The yield strength and Charpy impact toughness are both increased by TMP treatment, compared to a conventional forging schedule. The strength increase is due to reductions in the ferrite grain size and pearlite colony size. There is also significant precipitation strengthening in the Ti, V microalloyed steel (1541+ Ti, V). The lowering of the impact transition temperature and the increase in Charpy energy produced by the TMP treatments are attributed to the decreases in ferrite grain size and pearlite colony size. In addition, for Nb microalloyed steel, the elongated microstructure and intragranular ferrite produced by TMP forging make the effective pearlite colony size very small in the direction of crack propagation.

Keywords

MICROALLOYED STEELS HOT FORGING THERMOMECHANICAL PROCESSING MICROSTRUCTURE MECHANICAL PROPERTIES

Get full access to this article

View all access options for this article.

References

TYNE

C. J. VAN

, KRAUSS

and D. K. MATLOCK (eds.): ‘Fundamentals and applications of microalloying forging steels’; 1996, Warrendale, PA, TMS.

NAYLOR

D. J.

: Mater. Scl Forum, 1998, 284-286, 83–89.

MATLOCK

D. K.

, KRAUSS

and SPEER

J. G.

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

SHELJASKOV

: J. Mater. Process. Technol, 1994, 46, 3–18.

REYNOLDS

J. H.

and NAYLOR

D. J.

: Mater. Scl Technol, 1988, 4, 586–602.

CARCIA-MATEO

, LOPEZ

and RODRIGUEZ-IBABE

J. M.

: Iron Steelmaker, 2000, 27, 79–85.

GONZALEZ-BAQUET

, KASPER

, RICHTER

, NUSSBAUM

and KoTHE

: Mater. Scl Forum, 1998, 284-286, 411–418.

LEE

D. L.

, YOO

S. J.

, AN

K. S.

, LEE

Y. W.

and CHOO

W. Y.

: in ‘Fundamentals and applications of microalloying forging steels’, (ed. C. J. Van Tyne et al), 17-28; 1996, Warrendale, PA, TMS.

BOYD

: in ‘Advances in industrial materials’, (ed.

Wilkinson

D. S.

et al.), 19-23; 1998, Montreal, QC, CIM.

10.

GLADMAN

: ‘The physical metallurgy of microalloyed steels’, 337; 1997, London, The Institute of Materials.

11.

TOURYAN

L. A.

, THOMPSON

S. W.

, MATLOCK

D. K.

and KRAUSS

: in ‘Microalloyed bar and forging steels’, (ed. Finn

), 63-83; 1990, Montreal, QC, CIM.

12.

HEITMANN

W. E.

and BABU

P. B.

: in ‘Fundamentals of microalloyed forging steels’, (ed. Krauss

and Banerji

S. K.

), 55-72; 1986, Warrendale, PA, TMS.

13.

LINAZA

M. A.

, ROMERS

J. L.

, RODRIGUEZ-IBABE

J. M.

and URCOLA

J. J.

: Scr. Metall Mater., 1993, 29, 1217–1222.

14.

MADARIAGA

and GUTIERREZ

: Mater. Scl Forum, 1998, 284-286, 419–426.

15.

GRASSL

K. J.

, THOMPSON

S. W.

, MATLOCK

D. K.

and KRAUSS

: ‘31st Mechanical working and steel processing conf. proc.’, Chicago, IL, USA, October 1989, ISS, 137–143.

16.

ZHAO

and BOYD

J. D.

: Mater. Scl Technol, 2003, 19, 1557–1563.

17.

PRIKRYL

, KROUPA

, WEATHERLY

G. C.

and SUBRAMANIAN

S. V.

: Metall Mater. Trans. A, 1996, 27A, 1149–1165.

18.

ROBERTS

, SANDBERG

, SIWECKI

and WERLEFORS

: Proc. Int. Conf. on ‘HSLA steels technology and applications’, Philadelphia, PA, October 1983, ASM, 67–84.

19.

SELLARS

C. M.

: Proc. Conf. on ‘Hot working and forming process’, Sheffield, UK, July 1979, The Metals Society, 3–15.

20.

JONAS

J. J.

and WEISS

: Met. Scl, 1979, 13, 238–245.

21.

ZHAO

and BOYD

J. D.

: in ‘HSLA steels ‘2000’, (ed. Liu

et al.), 127-132; 2000, Beijing, Metallurgical Industry Press.

22.

GLADMAN

: ‘The physical metallurgy of microalloyed steels’, 54; 1997, London, The Institute of Materials.

Microstructure – property relationships in thermomechanically processed microalloyed medium carbon steels

Abstract

Keywords

Get full access to this article

References