티타늄 스크랩 재활용에 의한 고순도 분말 소결 기술

최정철; 장세훈; 차용훈; 오익현; Jung-Chul Choi; Se-Hun Chang; Young-Hoon Cha; Ik-Hyun Oh

Korean Journal of Materials Research, Vol.19, No.7, 397-402, July, 2009

DOI10.3740/MRSK.2009.19.7.397 Export Citation

티타늄 스크랩 재활용에 의한 고순도 분말 소결 기술

Technology of High Purity Powder Sintering by Ti Scrap Recycling.

최정철, 장세훈, 차용훈¹, 오익현^†

한국생산기술연구원
¹조선대학교 기계공학과

Jung-Chul Choi, Se-Hun Chang, Young-Hoon Cha¹, and Ik-Hyun Oh^†

Korea Institute of Industrial Technology (KITECH), Gwangju 500-480, Korea
¹Department of Mechanical Engineering, Chosun University, Gwangju, Korea

E-mail:

In this study, Ti powder was fabricated from Ti scrap by the Hydrogenation-Dehydrogenation (HDH)method. Hydrogenation reactions of Ti scrap occurred at near 450 oC with a sudden increase in the reaction temperature and the decreasing pressure of hydrogen gas during the hydrogenation process in the furnace. The dehydrogenation process was also carried out at 750 oC for 2hrs in a vacuum of 10-4 torr. After the HDH process, a deoxidation treatment was carried out with the Ca(purity: 99.5) at 700 oC for 2hrs in the vacuum system. It was found that the oxidation content of Ti powder that was deoxidized with Ca showed noticeably lower values, compared to the content obtained by HDH process. In order to fabricate Ti compacts, Ti powder was sintered at 1100~1400 oC for 2hrs under a vacuum of 10-4 torr. The relative density of compact was 94.9% at 1300 oC. After sintering, all of the Ti compacts showed brittle fracture behavior, which occurred in an elastic range with short plastic yielding up to a peak stress.

Keywords:Ti scrap;HDH process;Ti powder;oxidation content;mechanical property

[References]

Zhenh H, Okabe TH, J. Alloys Compounds., 16619, 1 (2007)
Guitar A, Vigna G, Luppo MI, J. Mech. Bio. Mater., 2, 156 (2009)
Kim YJ, J. Kor. Pow. Met. Inst., 11(3), 265 (2004)
Kim YH, Kim YJ, Yang DW, Lee SK, Ahn JH, Kim YH, Kim YJ, Yang DW, Lee SK, Ahn JH, J. Kor. Inst. Met. Mater., 42(2), 143 (2004)
Kim WB, Choi GS, Suh CC, Kil DS, Ha H, J. Kor, Mat. Res., 9(3), 282 (1998)
Choe JS, Lee DH, Choi GS, Kil DS, Suh CY, Kim WB, HH, J. Kor. Mater., 10(7), 464 (2000)
Lee SH, Yoo JH, Chung H, Korean J. Chem. Eng., 18(3), 303 (2001)
Chung SH, Ha HP, Byun JY, J. Kor. Inst. Met. Mater., 45(5), 389 (2004)
Ha H, Park SS, Lee HC, J. Korean Ind. Eng. Chem., 5(2), 263 (1994)
Ahn DK, Hur BY, Kim SY, Park SH, Ahn HJ, Park SJ, J. Kor. Inst. Met. Mater., 40(8), 915 (2002)
Dieter GE, Mechanical Metallurgy 3th ed., p.77-80, McGraw- Hill, USA (1986). (1986)
Choi JC, Chang SH, Cha YH, Oh IH, Korean J. Mater. Res., 19(2), 55 (2009)

[Referenced By]

[1] Zhenh H, Okabe TH, J. Alloys Compounds., 16619, 1 (2007)

[2] Guitar A, Vigna G, Luppo MI, J. Mech. Bio. Mater., 2, 156 (2009)

[3] Kim YJ, J. Kor. Pow. Met. Inst., 11(3), 265 (2004)

[4] Kim YH, Kim YJ, Yang DW, Lee SK, Ahn JH, Kim YH, Kim YJ, Yang DW, Lee SK, Ahn JH, J. Kor. Inst. Met. Mater., 42(2), 143 (2004)

[5] Kim WB, Choi GS, Suh CC, Kil DS, Ha H, J. Kor, Mat. Res., 9(3), 282 (1998)

[6] Choe JS, Lee DH, Choi GS, Kil DS, Suh CY, Kim WB, HH, J. Kor. Mater., 10(7), 464 (2000)

[7] Lee SH, Yoo JH, Chung H, Korean J. Chem. Eng., 18(3), 303 (2001)

[8] Chung SH, Ha HP, Byun JY, J. Kor. Inst. Met. Mater., 45(5), 389 (2004)

[9] Ha H, Park SS, Lee HC, J. Korean Ind. Eng. Chem., 5(2), 263 (1994)

[10] Ahn DK, Hur BY, Kim SY, Park SH, Ahn HJ, Park SJ, J. Kor. Inst. Met. Mater., 40(8), 915 (2002)

[11] Dieter GE, Mechanical Metallurgy 3th ed., p.77-80, McGraw- Hill, USA (1986). (1986)

[12] Choi JC, Chang SH, Cha YH, Oh IH, Korean J. Mater. Res., 19(2), 55 (2009)