600 MPa급 고강도 일반 및 내진 철근의 미세조직, 경도와 인장 특성

서하늘; 이상인; 황병철; Ha-Neul Seo; Sang-In Lee; Byoungchul Hwang

Korean Journal of Materials Research, Vol.27, No.9, 477-483, September, 2017

DOI10.3740/MRSK.2017.27.9.477 Export Citation

600 MPa급 고강도 일반 및 내진 철근의 미세조직, 경도와 인장 특성

Microstructure, Hardness and Tensile Properties of 600 MPa-Grade High-Strength and Seismic Resistant Reinforcing Steels

서하늘, 이상인, 황병철 ^†

서울과학기술대학교 신소재공학과

Ha-Neul Seo, Sang-In Lee, and Byoungchul Hwang^†

Department of Materials Science and Engineering, Seoul National University of Science and Technology, Seoul 01811, Republic of Korea

E-mail:

This present study deals with the microstructure and tensile properties of 600 MPa-grade high strength and seismic resistant reinforcing steels. The high strength reinforcing steel (SD 600) was fabricated by Tempcore processing, while the seismic resistant reinforcing steel (SD 600S) was air-cooled after hot-rolling treatment. The microstructure analysis results showed that the SD 600 steel specimen consisted of a tempered martensite and ferrite-pearlite structure after Tempcore processing, while the SD 600S steel specimen had a fully ferrite-pearlite structure. The room-temperature tensile test results indicate that, because of the enhanced solid solution and precipitation strengthening caused by relatively higher contents of C, Mn, Si and V in the SD 600S steel specimen, this specimen, with fully ferrite-pearlite structure, had yield and tensile strengths higher than those of the SD 600 specimen. On the other hand, the hardness of the SD 600 and SD 600S steel specimens changed in different ways according to location, dependent on the microstructure, ferrite grain size, and volume fraction.

Keywords:high strength;seismic resistant;reinforcing steels;microstructure;tensile properties

[References]

Lee SY, Lee HC, Park CS, Woo KM, Suh YT, J. Korea Concrete Inst., 22, 28 (2010)
Ivoditov AN, Alekseev YUN, Kozlov NP, Steel in the USSR, 15, 297 (1985).
Simon P, Economopoulos M, Nilles P, Iron Steel Eng., 61, 53 (1984)
Simon P, Economopoulos M, Nilles P, Metall. Plant Technol., 84, 80 (1984)
Hwang B, Shim JH, Lee MG, Lee J, Jung JH, Kim BS, Won SB, Korean J. Met. Mater, 54, 862 (2016)
Park KT, Jin KG, Han SH, Hwang SW, Choi K, Lee CS, Mater. Sci. Eng. A-Struct. Mater. Prop. Microstruct. Process., 527, 3651 (2010)
Porter D, Phase Transformations in Metals and Alloys, 3rd ed., p.536, K. E. Easterling, CRC Press, USA (2009).
Korean Standards Association, KS D 3504 (2016).
Eum SY, Park HM, Nam TW, J. Korea Foundry Soc., 20, 29 (2000)
Park NK, Lee HS, Chai YS, Korean J. Mater. Res., 17(10), 555 (2007)
Sellars CM, Whiteman JA, Met. Sci., 13, 101 (1979)
Ju DH, Jang BS, Lim YM, Koh JH, J. Korea Academia-Industrial Cooperation Soc., 13, 1939 (2012).
Bodnar RL, Hansen SS, Metall. Mater. Trans. A-Phys. Metall. Mater. Sci., 25, 665 (1994)
Helmersson U, Todorova S, Barnett SA, Sundgren JE, Markert LC, Greene JE, J. Appl. Phys., 62, 481 (1987)
Patel JR, Chaudhuri AR, J. Appl. Phys., 34, 2788 (1963)
Kataoka T, Yamada T, Jpn. J. Appl. Phys., 16, 1119 (1977)
Chokshi AH, Rosen A, Karch J, Gleiter H, Scripta Metall., 23, 1679 (1989)
Li JCM, Chou YT, Metall. Mater. Trans., 1, 1145 (1970)
Gladman T, Mater. Sci. Technol., 15, 30 (1999)
Kubo H, Nakamura K, Farjami S, Maruyama T, Mater. Sci. Eng. A-Struct. Mater. Prop. Microstruct. Process., 378, 343 (2004)
Hull D, Bacon DJ, International Series on Materials Science and Technology, 37, 248 (1984).

[Related Articles]

[1] Lee SY, Lee HC, Park CS, Woo KM, Suh YT, J. Korea Concrete Inst., 22, 28 (2010)

[2] Ivoditov AN, Alekseev YUN, Kozlov NP, Steel in the USSR, 15, 297 (1985).

[3] Simon P, Economopoulos M, Nilles P, Iron Steel Eng., 61, 53 (1984)

[4] Simon P, Economopoulos M, Nilles P, Metall. Plant Technol., 84, 80 (1984)

[5] Hwang B, Shim JH, Lee MG, Lee J, Jung JH, Kim BS, Won SB, Korean J. Met. Mater, 54, 862 (2016)

[6] Park KT, Jin KG, Han SH, Hwang SW, Choi K, Lee CS, Mater. Sci. Eng. A-Struct. Mater. Prop. Microstruct. Process., 527, 3651 (2010)

[7] Porter D, Phase Transformations in Metals and Alloys, 3rd ed., p.536, K. E. Easterling, CRC Press, USA (2009).

[8] Korean Standards Association, KS D 3504 (2016).

[9] Eum SY, Park HM, Nam TW, J. Korea Foundry Soc., 20, 29 (2000)

[10] Park NK, Lee HS, Chai YS, Korean J. Mater. Res., 17(10), 555 (2007)

[11] Sellars CM, Whiteman JA, Met. Sci., 13, 101 (1979)

[12] Ju DH, Jang BS, Lim YM, Koh JH, J. Korea Academia-Industrial Cooperation Soc., 13, 1939 (2012).

[13] Bodnar RL, Hansen SS, Metall. Mater. Trans. A-Phys. Metall. Mater. Sci., 25, 665 (1994)

[14] Helmersson U, Todorova S, Barnett SA, Sundgren JE, Markert LC, Greene JE, J. Appl. Phys., 62, 481 (1987)

[15] Patel JR, Chaudhuri AR, J. Appl. Phys., 34, 2788 (1963)

[16] Kataoka T, Yamada T, Jpn. J. Appl. Phys., 16, 1119 (1977)

[17] Chokshi AH, Rosen A, Karch J, Gleiter H, Scripta Metall., 23, 1679 (1989)

[18] Li JCM, Chou YT, Metall. Mater. Trans., 1, 1145 (1970)

[19] Gladman T, Mater. Sci. Technol., 15, 30 (1999)

[20] Kubo H, Nakamura K, Farjami S, Maruyama T, Mater. Sci. Eng. A-Struct. Mater. Prop. Microstruct. Process., 378, 343 (2004)

[21] Hull D, Bacon DJ, International Series on Materials Science and Technology, 37, 248 (1984).