7175Al 링롤단조재의 미세조직과 기계적 성질에 미치는 공정조건의 영향 = Research Effect of Process Conditions on the Microstructure and Mechanical Properties of 7175AI Ring Roll Forgings

다국어 초록 (Multilingual Abstract)

The aim of this study is to investigate the process conditions on the microstructual changes and mechanical properties of large 7175 aluminum ring roll forgings. The billets range from 370 ㎜ to 720 ㎜ in diameter were homogenized and ring roll forged after direct chill casting. The tensile properties of ring roll forged specimen manufactured with Φ370 ㎜ billets were superior to those of Φ720 ㎜ billets under T_(6), condition. Also, these properties showed better than those of military specification under 174 treatment. The impact value of ring roll forged specimen under T_(74), treatment increased up to 20% than that of T_(6), condition. The fracture toughness of ring roll forged specimen manufactured with Φ370 ㎜ cast billet showed nearly same level of Φ720 ㎜ billet which was processed using MF or Cog free forging followed by ring roll forging.

참고문헌 (Reference)

1 "U. S. Patent 3198676"

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