Steel abrasive materials
    6.
    发明授权
    Steel abrasive materials 失效
    钢磨料

    公开(公告)号:US4071381A

    公开(公告)日:1978-01-31

    申请号:US720596

    申请日:1976-09-07

    CPC分类号: C22C38/00 C09K3/1409 C21D1/19

    摘要: Disclosed is a refined and alloyed martensite-free cast steel abrasive material and method of making the same. The abrasive material is either shot or grit and has a composition which includes carbon in about the range of 0.60 to 1.20 percent by weight, silicon in about the range of from 0.30 to 1.50 percent by weight, sulphur in about the range of from 0.0 to 0.1 percent by weight with the remainder substantially all iron, trace elements and impurities. The substantially martensite-free micro-structure is characterized by the presence of one or more of the group consisting of lower bainite, upper bainite, pearlite or ferrite and mixtures thereof, thus providing a more ductile abrasive particle of improved wear resistance.

    摘要翻译: 公开了一种精炼和合金化的不含马氏体的铸钢研磨材料及其制造方法。 研磨材料是喷射或砂粒,并且具有包含在约0.60至1.20重量%范围内的碳的组合物,约0.30至1.50重量%的硅,约0.01-0.20重量% 0.1%(重量),其余基本上全部为铁,微量元素和杂质。 基本上不含马氏体的微结构的特征在于存在由下贝氏体,上贝氏体,珠光体或铁氧体及其混合物组成的组中的一种或多种,​​因此提供了具有改进的耐磨性的更具韧性的磨料颗粒。

    Low thermal expansion composites
    8.
    发明授权
    Low thermal expansion composites 失效
    低热膨胀复合材料

    公开(公告)号:US3766000A

    公开(公告)日:1973-10-16

    申请号:US3766000D

    申请日:1970-03-02

    IPC分类号: C04B35/80 C04B41/45 C04B35/70

    摘要: Process for dispersing fibers in a refractory metal compound phase comprising coating fibers, e.g. graphite fibers, with a mixture of a refractory metal compound of extremely small particle size, e.g. NbC of 0.02 micron size, and sufficient binder, e.g. polymerizable furfuryl alcohol and maleic anhydride, to form a slurry, forming the coated fibers to the desired shape and heating the formed coated fibers at high temperatures in the range of about 40% to about 98% of the melting point of the refractory compound, e.g. about 3,000*C, to form a composite. The article produced by the above process is characterized by low thermal expansion values.

    摘要翻译: 将纤维分散在包含涂覆纤维的难熔金属化合物相中的方法,例如 石墨纤维,具有极小粒度的难熔金属化合物的混合物,例如, 0.02微米尺寸的NbC和足够的粘合剂,例如。 可聚合的糠醇和马来酸酐,以形成浆料,将涂覆的纤维形成所需的形状,并在高温下加热所形成的涂覆的纤维,其温度范围为耐火材料的熔点的约40%至约98%。 约3000℃,形成复合材料。 通过上述方法生产的制品的特征在于低热膨胀值。

    Refractories bonded with aluminides,nickelides,or titanides
    9.
    发明授权
    Refractories bonded with aluminides,nickelides,or titanides 失效
    与铝,镍或钛合金结合的耐火材料

    公开(公告)号:US3676161A

    公开(公告)日:1972-07-11

    申请号:US3676161D

    申请日:1969-03-03

    申请人: DU PONT

    发明人: YATES PAUL C

    摘要: DENSE COMPOSITIONS HAVING A GRAIN SIZE SMALLER THAN 10 MICRONS AND CONTAINING FROM 10 TO 80 VOLUME PERCENT OF A WEAR-RESISTANT MATERIAL SELECTED FROM THE GROUP CONSISTING OF (A) ALUMINUM NITRIDE, (B) TANTALUM NITRIDE, (C) MIXTURES OF (A) AND (B), AND (D) A REFRACTORY OXIDE OF AN ELEMENT SELECTED FROM THE GROUP CONSISTING OF MAGNESIUM, ZIRCONIUM, HAFNIUM, TITANIUM, CHROMIUM, BERYLLIUM, ZINC, CALCIUM, THORIUM, BARIUM, STRONTIUM, SILICON, THE RARE EARTH METALS, AND MIXTURES THEREOF; 15 TO 80 VOLUME PERCENT OF A METALLINE SELECTED FROM THE GROUP CONSISTING OF TITANIUM CARBIDE, TITANIUM NITRIDE, ZIRCONIUM CARBIDE, ZIRCONIUM NITRIDE, TANTALUM CARBIDE, NIOBIUM CARBIDE, NIOBIUM NITRIDE, AND MIXTURES THEREOF; AND 5 TO 35 VOLUME PERCENT OF AN INTERMETALLIC SELECTED FROM THE GROUP CONSISTING OF MOLYBDENUM NICKELIDE, TANTALUM NICKELIDE, ZIRCONIUM, NICKELIDE, NIUBIUM NICKELIDE, COBALT, ALUMINIDE, COBALT TITANIDE, IRON ALUMINIDE, IRON TITANIDE, NICKEL ALUMINIDE, NICKEL TITANIDE, TUNGSTEN ALUMINIDE, MOLYBDENUM ALUMINIDE, NIOBIUM ALUMINIDE, TANTALUM ALUMINIDE, TITANIUM ALUMINIDE, ZIRCONIUM ALUMINIDE, AND MIXTURES THEREOF ARE (1) EFFECTIVE FOR CUTTING TOOLS FOR HIGH SPEED MACHINING AND (2) RESISTANT TO OXIDATION.