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    • 81. 发明专利
    • 粉末冶金用粉末混合物およびその製造方法
    • JP2019002068A
    • 2019-01-10
    • JP2018085505
    • 2018-04-26
    • JFE STEEL CORP
    • UNAMI SHIGERUOYA MASATO
    • B22F1/00B22F1/02
    • 【課題】流動性に極めて優れ、少ない力で圧粉成形金型から抜出すことができ、成形時の型かじりが抑制された粉末冶金用粉末混合物を提供する。【解決手段】原料粉末と、バインダと、黒鉛粉とを含む粉末冶金用粉末混合物であって、前記原料粉末が、該原料粉末の90質量%以上の鉄基粉末を含有し、前記黒鉛粉の平均粒径が5μm未満であり、前記原料粉末の質量(mr)と前記黒鉛粉の質量(mg)の合計に対する前記バインダの質量(mb)の比率[mb/(mr+mg)×100]が、0.10〜0.80質量%であり、前記原料粉末の質量(mr)と前記黒鉛粉の質量(mg)の合計に対する前記黒鉛粉の質量(mg)の比率[mg/(mr+mg)×100]が、0.6〜1.0質量%であり、前記原料粉末の表面が、前記バインダの少なくとも一部で被覆されており、前記原料粉末の表面に被覆された前記バインダの表面が、前記黒鉛粉の少なくとも一部で被覆されている、粉末冶金用粉末混合物。【選択図】なし
    • 83. 发明专利
    • Iron-based mixed powder for powder metallurgy, high strength iron-based sintered body, and manufacturing method of high strength iron-based sintered body
    • 用于粉末冶金,高强度铁基烧结体的基于铁的混合粉末和基于高强度铁基烧结体的制造方法
    • JP2013047378A
    • 2013-03-07
    • JP2012162188
    • 2012-07-23
    • Jfe Steel CorpJfeスチール株式会社
    • UNAMI SHIGERU
    • B22F1/00C22C22/00C22C33/02C22C38/00C22C38/22C22C38/58
    • PROBLEM TO BE SOLVED: To provide an iron-based mixed powder, a high strength iron-based sintered body with excellent toughness using the same, and a manufacturing method therefor.SOLUTION: The iron-based mixed powder for powder metallurgy includes a pre-alloy steel powder, as the iron-based powder, comprising, by mass%, one or more selected from Cr: 0.1-0.9%, Mo: 0.1-0.9%, Mn: 0.1-0.3%, and the balance being Fe and inevitable impurities. The iron-based mixed powder for powder metallurgy is prepared by mixing the pre-alloy steel powder with a powder for an alloy comprising, by mass%, a manganese powder with a composition containing N: 2-15% or a ferromanganese powder with a composition containing N: 2-15% and Fe: 40% or less, at an amount of 0.5-3% in terms of Mn by mass%. In addition, a Cu powder and a Ni powder can be mixed as the powder for the alloy. The iron-based sintered body is manufactured by mixing the iron-based mixed powder for powder metallurgy with 0.1-1.0% of graphite powder, by mass%, in terms of C with respect to the total amount of the iron-based powder, the alloy powder, and the graphite powder, then forming a formed body, and sintering it.
    • 要解决的问题:提供一种铁基混合粉末,具有优异韧性的高强度铁基烧结体及其制造方法。 解决方案:用于粉末冶金的铁基混合粉末包括作为铁基粉末的预合金钢粉末,以质量%计含有选自Cr:0.1-0.9%,Mo:0.1中的一种或多种 -0.9%,Mn:0.1-0.3%,余量为Fe和不可避免的杂质。 用于粉末冶金的铁基混合粉末是通过将预合金钢粉末与合金粉末混合,以质量%计含有含有N:2-15%的组成的锰粉末或含有锰铁粉末的锰铁粉末制备的, 组成为N:2〜15%,Fe:40%以下,按质量%计为0.5〜3%。 此外,可以将Cu粉末和Ni粉末作为合金粉末混合。 铁基烧结体通过将粉末冶金用的铁基混合粉末与碳粉末的总量相对于碳的0.1质量%以上的石墨粉以质量%计, 合金粉末和石墨粉末,然后形成成形体,并烧结。 版权所有(C)2013,JPO&INPIT
    • 84. 发明专利
    • Iron-base mixed powder for powder metallurgy
    • 用于粉末冶金的铁基粉末混合粉末
    • JP2012092407A
    • 2012-05-17
    • JP2010242265
    • 2010-10-28
    • Jfe Steel CorpJfeスチール株式会社
    • UNAMI SHIGERUKONO TAKASHIONO TOMOSHIGEMAETANI TOSHIO
    • B22F1/00C22C38/00
    • PROBLEM TO BE SOLVED: To provide iron-base mixed powder for powder metallurgy, improved in compaction density of a green compact, and at the same time significantly reduced in ejection force after the powder is compacted, by enhancing a flowability of the iron-base mixed powder using low alloy steel powder containing Mo and Mn, and thereby improved in density and strength of a sintered boy and reduced in a manufacturing cost.SOLUTION: In the iron-base mixed powder for powder metallurgy, containing iron-base powder as a main component, water atomized alloy steel powder including, as spare alloys, 0.3-1.0 mass% Mo and 0.1-0.25 mass% Mn in ratios to the entire iron-base mixed powder, and consisting of the balance Fe and inevitable impurities, is used as the iron-based powder. In the ratio to the entire iron-based mixed powder, 0.5-4.0 mass% Cu power, and 03-1.0 mass% graphite powder are contained in the iron-base mixed powder, and a flaky powder having a 100 μm or shorter average particle diameter in long diameters, a 10 μm or less thickness, and a 5 or more aspect ratio (the ratio of the long diameter to the thickness), is also added thereto in the range of 0.01-5.0 mass%.
    • 要解决的问题:为了提供用于粉末冶金的铁基混合粉末,提高了压坯的压实密度,并且同时在粉末压实之后大大降低了喷射力,通过提高粉末的流动性 使用含有Mo和Mn的低合金钢粉末的铁基混合粉末,从而提高烧结男孩的密度和强度,并降低制造成本。

      解决方案:以铁粉为主要成分的粉末冶金铁粉混合粉末中,作为备用合金的水雾合金钢粉末含有0.3〜1.0质量%的Mo和0.1-0.25质量%的Mn 与铁基混合粉末的整体比例,由铁和不可避免的杂质构成,用作铁基粉末。 与铁质混合粉末的比例相对于铁基混合粉末中含有0.5-4.0质量%的Cu电力和0.03-1.0质量%的石墨粉末,平均粒径为100μm以下的片状粉末 在0.01-5.0质量%的范围内,还添加了长径为10μm以下的厚度,长径比为5以上的长径比(长径比与厚度的比)。 版权所有(C)2012,JPO&INPIT

    • 87. 发明专利
    • Method for producing high strength iron based sintered compact
    • 生产高强度铁基烧结方法
    • JP2011094187A
    • 2011-05-12
    • JP2009248790
    • 2009-10-29
    • Jfe Steel CorpJfeスチール株式会社
    • UNAMI SHIGERUOZAKI YUKIKO
    • B22F3/24B22F1/00B22F1/02C22C38/00C23C8/22
    • PROBLEM TO BE SOLVED: To provide a method for stably producing a high strength iron based sintered compact by establishing the most suitable conditions in sintering treatment and carburizing treatment for increasing the strength of an iron based sintered compact.
      SOLUTION: In the method for producing a high strength iron based sintered compact, the surface of iron based powder containing Mn as a prealloyed element by ≤0.3 mass% and Mo as a prealloyed element by 0.2 to 1.0 mass% is diffusively stuck with Mo by 0.05 to 0.5 mass%, also, graphite powder of 0.3 to 0.5 mass% is mixed therein so as to be alloy steel powder, a lubricant for compacting is mixed by ≤0.6 pts.mass to 100 pts.mass of the alloy steel powder, so as to be mixed powder, and the obtained mixed powder is subjected to compacting, is thereafter sintered at ≥1,200°C, is further subjected to gas carburizing quenching treatment at a quenching heating temperature of 850 to 900°C, and is next subjected to tempering treatment.
      COPYRIGHT: (C)2011,JPO&INPIT
    • 要解决的问题:为了提供一种稳定生产高强度铁基烧结体的方法,通过在提高铁基烧结体的强度的烧结处理和渗碳处理中建立最合适的条件。 解决方案:在高强度铁基烧结体的制造方法中,含有0.3质量%以下的预合金元素的Mn和0.2〜1.0质量%的预合金元素的铁基粉末的表面扩散粘合 Mo为0.05〜0.5质量%,将石灰粉0.3〜0.5质量%混合,作为合金钢粉末,将压实用润滑剂混合至0.6质量份〜100质量份 钢粉末,混合粉末,将所得混合粉末进行压实,然后在≥1,200℃下烧结,进一步在淬火加热温度为850〜900℃进行气体渗碳淬火处理, 接下来进行回火处理。 版权所有(C)2011,JPO&INPIT