0.15C-6Mn TRIP강의 미세조직과 기계적 성질에 미치는 역변태 열처리의 영향

홍호; 이오연; 송기홍; H. Hong; O.Y. Lee; K.H. Song

Korean Journal of Materials Research, Vol.13, No.7, 453-459, July, 2003

DOI10.3740/MRSK.2003.13.7.453 Export Citation

0.15C-6Mn TRIP강의 미세조직과 기계적 성질에 미치는 역변태 열처리의 영향

Effect of Reverse Transformation Treatment on the Microstructure and Mechanical Properties of 0.15C-6Mn TRIP Steels

홍호, 이오연 ^†, 송기홍¹

전북대학교 신소재공학부, 신소재개발연구센터
¹전주공업대학 컴퓨터응용기계계열

H. Hong, O.Y. Lee^†, and K.H. Song¹

Research Center of Advanced Materials Development, School of Advanced Materials Eng., Chonbuk National University, Korea
¹School of Computer Basis Applied Mechanics, Jeonju Technical College, Korea

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In this paper the effect of interstitial heat treatment on the microstructure and mechanical properties was examined both in the 0.15C-6Mn steels and 0.15C-6Mn steels added with Nb or Ti. This result will be applied into the development of a steel which has the properties of high strength and high ductility resulted from the transformation induced plasticity. The strength-elongation combination was increased as the holding time was increased when the temperature is at . However, the strength-elongation combination was decreased sharply as the holding time was increased when the temperature is at . The tensile strength and elongation of a reverse transformed steels added with Ti or Nb was 93 kg/ and 40%, respectively. This steel shows higher strength more than 10% of the 0.15C-6Mn steel without loss of ductility. The autenite formed from the reverse transformed treatment has a fine lath type, which has the width size of 0.1-0.3 . The TRIP sequence normally transforms the austenite to martensite, however, some of the sequence will produce retained austenite \longrightarrow deformation twin \longrightarrow martensite

Keywords:TRIP steels;reverse transformation;retained austenite;strength-elongation combination

[References]

Zackay VF, Parker ER, Fahr D, Bush R, Trans. ASM, 60, 252 (1967)
Hayami S, Frukawa T, Microalloying 75, p.87, Union Carbide Corp., New York (1975) (1975)
Matsumura O, Sakuma Y, Takechi H, Trans., 27, 571 (1987)
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[Related Articles]

[1] Zackay VF, Parker ER, Fahr D, Bush R, Trans. ASM, 60, 252 (1967)

[2] Hayami S, Frukawa T, Microalloying 75, p.87, Union Carbide Corp., New York (1975) (1975)

[3] Matsumura O, Sakuma Y, Takechi H, Trans., 27, 571 (1987)

[4] Furukawa T, Mater. Sci. Tech., 5, 465 (1989)

[5] Furukawa T, Hwang H, Matsumura O, Mater. Sci. Tech., 10, 964 (1994)

[6] Miller RL, Trans. ASM, 57, 892 (1964)

[7] Miller RL, Trans. ASM, 61, 592 (1968)

[8] Chen HC, Tomokiyo K, Era H, Shimizu H, J. Iron and Steel Inst., 75, 56 (1989)

[9] Chung JH, Ph. D. Thesis, POSTECH (1993) (1993)

[10] Suzuki T, Kojima H, Suzuki K, Hashimoto T, Ichimura M, Acta Metall., 25, 1151 (1977)

[11] Goel NC, Sangal S, Tangri K, Metall. Trans., 16A, 2013 (1985)

[12] Sachdev AK, Acta Metall., 31, 2073 (1983)

[13] Chung JH, Jang YW, Iron J, Steel Inst., 79, 48 (1993)

[14] Rigsbee JM, VanderArend PJ, Formable HSLA and Dual-Phase Steels, p.56, TMS-AIME, Warrendale (1979) (1979)