IRON POWDER FOR SURFACE FINISHING AND METHOD FOR PRODUCING THE SAME

PROBLEM TO BE SOLVED: To provide reduced iron powder high in apparent density for eliminating the treatment unevenness of surface finishing while having suitable polishing force as iron powder for surface finishing, and a method for producing the same.SOLUTION: Provided is reduced iron powder for surface finishing to a metallic product whose apparent density is 3,000 to 4,000 kg/m. Also provided is a method for producing reduced iron powder for surface finishing to a metallic product containing: a step where iron oxide powder is subjected to reduction treatment to obtain a spongy iron cake; a step where the spongy iron cake is subjected to cracking treatment and is thereafter subjected pulverization treatment to obtain the pulverized product of the spongy iron cake; a step where the pulverized product of the spongy iron cake is repeatedly pulverized till whose apparent density reaches 3,000 to 4,000 kg/mto obtain an apparent density-regulated product of the spongy iron cake; and a step where the apparent density-regulated product of the spongy iron powder is subjected to classification treatment.SELECTED DRAWING: None 【課題】表面仕上げ用鉄粉として適度な研磨力を持ちつつ、表面仕上げの処理むらを無くすために、見掛密度の高い還元鉄粉と、その製造方法を提供する。【解決手段】見掛密度が３０００ｋｇ／ｍ３以上４０００ｋｇ／ｍ３以下である、金属製品の表面仕上げ用の還元鉄粉。酸化鉄粉末を還元処理することで海綿鉄ケーキを得る工程と、上記海綿鉄ケーキを破砕処理後に粉砕処理することで海綿状鉄粉の粉砕品を得る工程と、上記海綿状鉄粉の粉砕品を、見掛密度を３０００ｋｇ／ｍ３以上４０００ｋｇ／ｍ３となるまで繰り返し粉砕する事で、海綿状鉄粉の見掛密度調整品を得る工程と、上記海綿状鉄粉の見掛密度調整品を分級処理する工程と、を有する金属製品の表面仕上げ用の還元鉄粉の製造方法。【選択図】なし