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    • 3. 发明申请
    • COPPER ALLOY AND METHOD OF MANUFACTURING SAME
    • 铜合金及其制造方法
    • WO1998010106A1
    • 1998-03-12
    • PCT/JP1997003152
    • 1997-09-08
    • TOTO LTD.NAKAMURA, KatsuakiASHIE, NobuyukiMATSUBARA, RyujiHAMASAKI, Masanao
    • TOTO LTD.
    • C22C09/04
    • C22F1/08C22C9/04
    • To provide a metallic material, in particular, brass, which is excellent in mechanical strength, cutting performance, ductility in hot working, and anticorrosion. Brass according to the invention is roughly classified into four types including " alpha + gamma ", " alpha + beta + gamma ", " alpha + normal beta " and " alpha + reinforced beta ". Brass of alpha + gamma type is alpha + gamma at room temperature, and its alpha phase has an area ratio of 97 to 70 %. Brass of alpha + beta + gamma type is alpha + beta + gamma at room temperature, and its beta phase and gamma phase, respectively, have area ratios of 3 to 30 %. In these two types, the gamma phase contains 8 wt.% Sn or more. Brass of alpha + normal beta type is alpha + beta at room temperature, and its beta phase has an area ratio of 20 % or more. Brass of alpha + reinforced beta type is alpha + beta at room temperature, and its beta phase has an area ratio of 15 % or more, and its beta phase contains 1.5 wt.% Sn or more. Brasses of all the types are alpha + beta in recrystallization temperature region, and their beta phases have area ratios of 30 to 80 %. Average crystal grain sizes of alpha and beta are 15 mu m or less, and preferably 10 mu m or less. An average crystal grain of gamma has an average minor axis of 8 mu m or less, and preferably 5 mu m or less. Brasses of alpha + gamma and alpha + gamma + beta have an apparent Zn content of 37 to 46 wt.%, and an entire Sn content of 0.9 to 7 wt.%. Brasses of the other two types have an apparent Zn content of 37 to 44 wt.%.
    • 提供机械强度,切割性能,热加工延展性和耐腐蚀性优异的金属材料,特别是黄铜。 根据本发明的黄铜大致分为“α+γ”,“α+β+γ”,“α+正常β”和“α+增强β”四种类型。 α+γ型黄铜在室温下为α+γ,其α相的面积比为97〜70%。 α+β+γ型黄铜在室温下为α+β+γ,分别为β相和γ相,面积比为3〜30%。 在这两种类型中,γ相含有8重量%以上的Sn或更多。 α+正常β型黄铜在室温下为α+β,其β相面积比为20%以上。 α+增强型β型黄铜在室温下为α+β,其β相的面积比为15%以上,β相含有1.5重量%以上的Sn。 所有类型的黄铜在再结晶温度区域为α+β,其β相的面积比为30〜80%。 α和β的平均晶粒尺寸为15μm以下,优选为10μm以下。 γ的平均晶粒的平均短轴为8μm以下,优选为5μm以下。 α+γ和α+γ+β的黄铜具有37至46重量%的表观Zn含量,并且整个Sn含量为0.9至7重量%。 其他两种类型的黄铜具有37至44重量%的表观Zn含量。