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潤滑剤として金属石鹸を含まず焼結炉への汚染の少ない高流動性偏析防止粉

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川崎製鉄技報

KAWASAKI STEEL GIHO Vol.33 (2001) No.2 環境対応鋼材特集号

潤滑剤として金属石鹸を含まず焼結炉への汚染の少ない高流動性偏析防止粉

Highly Flowable and Less-Furnace-Pollutive Segregation-Free Iron Based Powder Excluding Metallic Soap Lubricant

上 ノ 薗 聡(Satoshi Uenosono) 尾崎 由紀子(Yukiko Ozaki) 小倉 邦明(Kuniaki Ogura) 要旨 : ステアリン酸亜鉛などの金属石鹸をまったく含まず，流動性に優れたワックス系偏析防止 プレミックス粉「KIP クリーンミックス (KWAX-C)」を，世界で初めて開発した。新開発 した製品の流動度は川崎製鉄の従来のワックス系偏析防止プレミックス粉に比べ，ほぼ同 等であるが，新製品のホッパからの排出性は，大きく改善された。また，KIP クリーンミ ックス (KWAX-C) の圧縮性，抜出力，ラトラー値などの粉体特性や，引張強さ，衝撃値， 焼結寸法変化率などの焼結体特性は，従来品と同等であった。 Synopsis :

A new type of segregation-free iron based powder containing only wax as a lubricant and free metallic soap, CLEAN MIX (KWAX-C), has been developed to improve flowability and productivity in sintering process to lighten the burden in the maintenance of furnace. The flow rate of CLEAN MIX (KWAX-C) is almost equal to that of the conventional segregation-free iron based powder containing wax lubricant, CLEAN MIX (KWAX-A) and the index of flow blocking is smaller by 62％. The powder characteristics; such as compressibility, rattler value and ejection force of CLEAN MIX (KWAX-C), and the mechanical properties, such as tensile strength, Charpy impact value and dimensional changes during sintering of the compact made of it, were almost equal to those of the conventional segregation-free iron based powder containing wax lubricant.

(c)JFE Steel Corporation, 2003

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