• Title/Summary/Keyword: 액상확산접합

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A study on transient liquid phase diffusion bonding of 304 stainless steel and structural carbon steels (304 스테인레스강과 구조용탄소강과의 천이액상확산접합에 관한 연구)

  • 김우열;정병호;박노식;강정윤;박세윤
    • Journal of Welding and Joining
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    • v.9 no.4
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    • pp.28-39
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    • 1991

  • The change of microstructure in the bonded interlayer and mechanical properties of the joints were investigated during Transient Liquid Phase Diffusion Bonding(TLP bonding) of STS304/SM17C and STS304/SM45C couples using Ni base amorphous alloys added boron and prepared alloy as insert metal. Main experimental results obtained in this study are as follows: 1) Isothermal solidification process was completed much faster than theoretically expected time, 14ks at 1473K temperature. Its completion times were 3.6ks at 1423K, 2.5ks at 1473K and 1.6ks at 1523K respectively. 2) As the concentration of boron in the insert metal increased, the more borides were precipitated near bonded interlayer and grain boundary of STS304 side during isothermal solidification process, its products were $M_{23}P(C,B)_6}_3)$ The formation of grain boundary during isothermal solidification process was completed at structural carbon steel after starting the solidfication at STS304 stainless steel. 4) The highest value of hardness was obtained at bonded interface of STS304 side. The desirable tensile properties were obtained from STS304/SM17C, STS304/SM45C using MBF50 and experimentally prepared insert metal with low boron concentration.

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Microstructural change of wide gap transient liquid phase bonding with directional solidified Ni base superalloy GTD-111 by the mixing ratio of the base metal powder/Ni base filler metal. (모재분말/Ni기 삽입금속 분말의 혼합비에 따른 일방향응고 Ni기 초내열합금 GTD-111의 Wide Gap 천이액상확산접합부의 미세조직 변화)

  • Song, U-Yeong;Lee, Bong-Geun;Han, Tae-Gyo;Ye, Chang-Ho;Gang, Jeong-Yun
    • Proceedings of the KWS Conference
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    • 2005.06a
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    • pp.155-157
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    • 2005

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Characteristics of Liquid Phase Diffusion Bonded Joints Using Newly Developed Ni-3Cr-4Si-3B Insert Metal of Heat Resistant Alloy (신개발 Ni-3Cr-4Si-3B 삽입금속으로 액상확산접합한 내열주강 접합부의 특성)

    • Journal of Welding and Joining
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    • v.18 no.6
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    • pp.62-67
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    • 2000

  • Metallurgical characteristics of bonded region and high temperature mechanical properties of heat resistant alloy, Fe-35Ni-26Cr during liquid phase diffusion bonding were investigated employing AM17 insert metal. The insert metal for bonding, AM17 was newly developed Ni-base metal using interpolation method. Bonding of specimens were carried out at 1,403~1,463K for 600s in vacuum. The microconstituents in the bonded interlayer disappeared in the bonding temperature over 1,423K. The microstructures, alloying elements and hardness distribution in the base metal. The tensile strength and elongation of the joints at elevated temperatures were the same level as one of the base metal in the bonding temperature over 1,423K. The creep rupture strength and rupture lives of joints were almost identical to those of base metal.

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