Carbide method and article for hard finishing resulting in improved wear resistance
    1.
    发明授权
    Carbide method and article for hard finishing resulting in improved wear resistance 有权
    硬质合金方法和硬质合金制品,提高耐磨性

    公开(公告)号:US07169238B2

    公开(公告)日:2007-01-30

    申请号:US10745107

    申请日:2003-12-22

    IPC分类号: C23C8/22

    摘要: An article and method for forming an article having a hard-finished surface including a predetermined density of carbides to improve pitting and wear resistance and to significantly increase the overall life of the article. This method comprises selecting a carburizing grade material to form an article, carburizing the article to form a microstructure on at least one portion of the article having a predetermined density of carbides dispersed in the microstructure to a predetermined depth, quenching the article to form a hardened matrix dispersed with carbides and hard finishing the article to form the surface, the surface having at least approximately 20% by volume fraction carbides dispersed in the hardened matrix.

    摘要翻译: 一种用于形成具有包括预定密度的碳化物的硬化表面以改善点蚀和耐磨性并且显着增加制品的整个寿命的制品的制品和方法。 该方法包括选择渗碳级材料以形成制品,使制品渗碳以在具有分散在微结构中的预定密度的碳化物的至少一部分上形成微结构至预定深度,淬火制品以形成硬化 基质用碳化物分散并硬化整理制品以形成表面,该表面具有分散在硬化基体中的至少约20体积%的碳化物。

    Method and apparatus for characterizing a quench
    2.
    发明授权
    Method and apparatus for characterizing a quench 失效
    用于表征淬火的方法和装置

    公开(公告)号:US06238087B1

    公开(公告)日:2001-05-29

    申请号:US09351817

    申请日:1999-07-13

    IPC分类号: G01N2500

    摘要: A method and apparatus for characterizing a quench for producing desired hardness characteristics on a steel part. The characterization preferably includes a series of heat transfer coefficients versus temperature for the quench determined from information representative of known quenches and distinguishing part characteristics such as geometry, size and composition. The quench characterization determined using the present method and apparatus can be utilized in hardness prediction software programs, and for determining a suitable quench for producing the desired hardness characteristics on the part.

    摘要翻译: 用于表征淬火以在钢部件上产生所需硬度特性的方法和装置。 表征优选地包括一系列传热系数对淬火温度的测定,该温度由代表已知淬火和识别部件特性如几何形状,尺寸和组成的信息确定。 使用本方法和设备确定的淬火特性可用于硬度预测软件程序中,并且用于确定用于产生所需部分所需硬度特性的合适的淬火。

    Process for improving fatigue resistance of a component by tailoring
compressive residual stress profile, and article
    3.
    发明授权
    Process for improving fatigue resistance of a component by tailoring compressive residual stress profile, and article 失效
    通过调整压缩残余应力分布来改善部件的抗疲劳性的方法和制品

    公开(公告)号:US5841033A

    公开(公告)日:1998-11-24

    申请号:US769283

    申请日:1996-12-18

    CPC分类号: C21D7/04

    摘要: A process for improving fatigue resistance of a case hardened component having a case thickness "t", subjected to one or more of rolling, sliding, abrasion, bending and pitting includes determining the magnitude of fatigue strength at surface and at a plurality of pre-selected points along thickness "t" of a component. The applied fatigue stresses acting upon the component at the surface and at the plurality of pre-selected points along thickness "t" are also determined. Then, a compressive residual stress profile is tailored from the surface to thickness "t" of the component. The compressive residual stresses at the surface and at the plurality of the pre-selected points along thickness "t" respectively have a magnitude sufficient to attain a net resultant stress which is at least 25% lower than the fatigue strength at the surface and the corresponding plurality of pre-selected points.

    摘要翻译: 经历了滚动,滑动,磨损,弯曲和点蚀中的一种或多种的具有壳体厚度“t”的壳体硬化部件的抗疲劳性的方法包括确定表面处的疲劳强度的大小, 沿着组件厚度“t”的选定点。 还确定了沿着厚度“t”作用在表面和多个预选点处的部件的施加的疲劳应力。 然后,从表面到组件的厚度“t”调整压缩残余应力分布。 表面和沿着厚度“t”的多个预先选择的点处的压缩残余应力分别具有足以获得至少比表面疲劳强度低25%的净合金应力的量值, 多个预选点。

    Method of manufacturing a crankshaft
    5.
    发明授权
    Method of manufacturing a crankshaft 失效
    制造曲轴的方法

    公开(公告)号:US5303468A

    公开(公告)日:1994-04-19

    申请号:US829006

    申请日:1991-12-02

    IPC分类号: B21K1/08 F16C3/10 B23D15/00

    摘要: A crankshaft is manufactured by providing a plurality of initially completely discrete crankshaft segments electron-beam welded together. Tubular bearing journals (12,14) having an inclined surface (30) are positioned in a groove (35,40) of a counterweight web (16) and a groove (50) of a crankshaft end (18). The discrete segments (12,14,16,18) are positioned and maintained in position by the interaction of inclined surfaces (30) and grooves (35,40,50) for electron-beam welding.

    摘要翻译: PCT No.PCT / US91 / 08885 Sec。 371 1991年12月2日第 102(e)1991年12月2日PCT PCT 1991年12月2日PCT公布。 公开号WO93 / 11366 日期:1993年6月10日。曲轴通过将多个最初完全分离的曲轴段电子束焊接在一起而制造。 具有倾斜表面(30)的管状轴承轴颈(12,14)定位在配重腹板(16)的凹槽(35,40)和曲轴端部(18)的凹槽(50)中。 通过用于电子束焊接的倾斜表面(30)和凹槽(35,40,50)的相互作用,分立的段(12,14,16,18)被定位并保持在适当位置。