pISSN : 1598-706X / eISSN : 2288-8381
한국주조공학회지 (34권3호 94-99)
The Effect of Remelting Cycles and Its Carbon Content on the Glass Forming Ability and Mechanical Properties of the Zr-based Amorphous Alloy Return Scrap
Zr기지 비정질 합금 스크랩의 비정질 형성능 및 기계적 성질에 미치는 재용해 횟수와 탄소 함량의 영향
Byung-Chul Lee, Sung-Gyoo Kim*, Bong-Gyu Park*, Heung-Il Park* and Hwa-Soon Park*†
Performance Material Korea Co. Ltd., *Pukyung National University
A commercially used Zr-based amorphous alloy was recycled and the effects of introducing carbon during recycling on the glass forming ability and mechanical properties of the alloy were investigated. The initial carbon content used in this study was 229ppm. The carbon content was gradually increased as the number of recycling iterations was increased and after the 4th recycling it rapidly increased. As return scrap was recycled, polygonal particles precipitated, and they were identified as ZrC. The amount of the precipitates also increased with recycling. Tg, Tx and ΔT of the base alloy were 615 K, 696 K and 81 Kr respectively and they changed to 634 K, 706 K and 72 K after the 10th recycling. The decrease of the ΔT value indicates deterioration of the glass forming ability. Hardness was not changed during three iterations of recycling but after the 4th recycling it significantly increased. This is ascribed to an increase of amount of the hard particles, namely ZrC.
Zr-based amorphous alloy, Recycling, Carbon content, Mechanical properties
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