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    • 3. 发明申请
    • IRON-BASE POWDER MIXTURE FOR POWDER METALLURGY HAVING EXCELLENT FLUIDITY AND MOLDABILITY AND PROCESS FOR PREPARING THE SAME
    • 用于具有优异流动性和可塑性的粉末冶金的铁基粉末混合物及其制备方法
    • WO1998005454A1
    • 1998-02-12
    • PCT/JP1997000029
    • 1997-01-09
    • KAWASAKI STEEL CORPORATIONOZAKI, YukikoUENOSONO, SatoshiOGURA, Kuniaki
    • KAWASAKI STEEL CORPORATION
    • B22F01/02
    • B22F1/0062B22F1/0059B22F1/0077B22F1/0096B22F1/02B22F2003/023B22F2003/145B22F2998/00C22C33/02C22C33/0207
    • An iron-base powder mixture for powder metallurgy which exhibits enhanced fluidity and moldability when heated to about 423 K and filled into a mold for molding is prepared by adding a surface modifier to an iron-base powder and an alloying powder, conducting primary mixing to prepare an iron-base powder mixture, adding at least one member selected from the group consisting of fatty acid amides, metallic soaps having higher melting points than the fatty acid amides, thermoplastic resins, thermoplastic elastomers, and inorganic and organic compounds having lamellar crystal structures to the iron-base powder mixture to conduct secondary mixing, agitating thereafter the mixture while heating to at least the melting point of the added amide to melt the amide, cooling the mixture while mixing the same to adhere the alloying powder and the lubricant having a higher melting point than the amide onto the surface of the iron powder by taking advantage of the binding force of the melt, and adding thereto, during cooling, at least one member selected from the group consisting of metallic soaps, thermoplastic resin and thermoplastic elastomer powders, and inorganic and organic compounds having lamellar crystal structures to conduct tertiary mixing.
    • 通过在铁基粉末和合金粉末中添加表面改性剂,进行初次混合,制备用于粉末冶金的铁基粉末混合物,其在加热至约423K并且填充到模制模具中时具有增强的流动性和成型性, 制备铁基粉末混合物,加入选自脂肪酸酰胺,熔点高于脂肪酸酰胺的金属皂,热塑性树脂,热塑性弹性体和具有层状晶体结构的无机和有机化合物中的至少一种 对铁基粉末混合物进行二次混合,然后在加热到加入的酰胺的至少熔点以熔化酰胺的同时搅拌混合物,同时混合该混合物,同时将其混合以使合金粉末和具有 通过利用熔体和粘合剂的结合力,使铁粉表面的熔点比酰胺高 在冷却期间,选自由金属皂,热塑性树脂和热塑性弹性体粉末组成的组中的至少一种,以及具有层状晶体结构的无机和有机化合物进行三次混合。
    • 10. 发明申请
    • ADHESION QUANTITY REGULATION METHOD BY GAS WIPING
    • 粘性数量调节方法
    • WO1994025179A1
    • 1994-11-10
    • PCT/JP1993000555
    • 1993-04-28
    • KAWASAKI STEEL CORPORATIONANDACHI, KazunariSHIGEMOTO, Harumi
    • KAWASAKI STEEL CORPORATION
    • B05D01/40
    • B05D3/042C23C2/20
    • Relational formulas for determining an adhesion quantity of a coating material are separately set in accordance with a relative relation between a nozzle-strip gap D and a nozzle slit gap B, and the adhesion quantity of the coating material is accurately regulated over a broad operation range using the relational formulas. A nozzle pressure P and a strip speed V are controlled, and D is controlled using the formula (1): W = h1 x rho M x {(K-1)/(2x eta xKxPA)} x D x [ mu xV/{(P/PA) -1}] , when D/B C (complete development region), on the other hand, at least one of D and B is controlled using the formula (2): W = h2 x rho M x {(K-1)/(2x eta xKxPA)} x (D/B )x[ mu xV/{(P/PA) -1}] , so as to regulate the adhesion quantity of a molten metal (coating material) ( rho M: density of molten metal, mu : viscosity of molten metal, PA: pressure at nozzle outlet, eta : nozzle efficiency, K: specific heat ratio of gas, h1 and h2: constants).
    • 根据喷嘴带间隙D和喷嘴狭缝间隙B之间的相对关系分别设定用于确定涂布材料的附着量的关系式,并且涂布材料的粘附量在宽的操作范围内被精确地调节 使用关系公式。 控制喷嘴压力P和剥离速度V,并且使用公式(1)来控制D:W = h1 x rho M x {(K-1)/(2x eta xKxPA)} 1/2 1/2 当D / B (扩展区域)时,<1/2> x [xV / {(P / PA)<(K-1)/ K> -1}] 1/2。 另一方面,当D / B> C(完全显影区域)时,使用公式(2)来控制D和B中的至少一个:W = h 2 x rho M x {(K-1)/(2×eta xKxPA)} <1/2> x(D / B 1/2)x [xV / {(P / PA)<(K-1)/ K> -1}] 1/2 为了调节熔融金属(涂料)的附着量(rho M:熔融金属的密度,μ:熔融金属的粘度,PA:喷嘴出口的压力,eta:喷嘴效率,K:气体的比热比, h1和h2:常量)。