CENTER POROSITY-REDUCED CAST PIECE

CENTER POROSITY-REDUCED CAST PIECE

PROBLEM TO BE SOLVED: To provide a center porosity-reduced cast piece reducing the center porosity by surely crushing the slab-shaped cast pieces.SOLUTION: There is provided a cast piece having the ratio (D/W) of a casting thickness D to a casting width W of 0.1-0.6 and the casting thickness of 390-...

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Bibliographische Detailangaben
Hauptverfasser: UCHIYAMA HIROHI, NAGAI SHINJI, IMAI SHUNTARO, TAKADA RYOSUKE, SAKURAI HIDEAKI, MIZOGUCHI TOSHIAKI
Format: Patent
Sprache:eng ; jpn
Schlagworte:
CASTING
CASTING OF METALS
CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
PERFORMING OPERATIONS
POWDER METALLURGY
TRANSPORTING
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Beschreibung
Zusammenfassung:PROBLEM TO BE SOLVED: To provide a center porosity-reduced cast piece reducing the center porosity by surely crushing the slab-shaped cast pieces.SOLUTION: There is provided a cast piece having the ratio (D/W) of a casting thickness D to a casting width W of 0.1-0.6 and the casting thickness of 390-800 mm. A first wide reduction recessed part 2, and a second narrow reduction recessed part 3 formed by further reducing the surface of the first reduction recessed part 2 are formed on a long side surface in at least one side of the cast piece. Such two stage reduction makes it possible to control the maximum porosity volume of the cast piece to 1.5×10cm/g or less.SELECTED DRAWING: Figure 1 【課題】スラブ形状の鋳片を確実に押し潰してセンターポロシティを減少させたセンターポロシティ低減鋳片を提供する。【解決手段】鋳造厚Ｄと鋳造幅Ｗの比（Ｄ／Ｗ）が０.１〜０.６、鋳造厚Ｄが３９０〜８００ｍｍの鋳片である。その少なくとも片側の長辺表面に、幅広の第１圧下凹部２と、この第１圧下凹部１の表面を更に圧下して形成された幅狭の第２圧下凹部３とが形成されている。この２段階の圧下によって、鋳片の最大ポロシティ体積を１.５×１０−４ｃｍ３／ｇ以下とすることができる。【選択図】図１