.beta.-annealing of titanium alloys
    1.
    发明授权
    .beta.-annealing of titanium alloys 失效
    钛合金的β退火

    公开(公告)号:US5683607A

    公开(公告)日:1997-11-04

    申请号:US696772

    申请日:1996-08-14

    摘要: Capitalizing on the unique feature of our induction heating workcell that permits rapid and controlled heating and cooling of a workpiece within a wide temperature range permits combining several manufacturing operations into a single heating cycle to save time, energy, capital, touch labor, and factory space. For example, we can combine superplastic forming (SPF) with brazing, two operations that occur at temperatures that differ by about 150-200.degree. F. (85-105-C.) or more, to produce quality parts. Or, we can combine SPF with .beta.-annealing; of titanium. Finally, we can combine forming, brazing, and annealing into an economical single cycle. Illustrating our combined cycles, we produce multisheet SPF parts with braze joints at selected locations with improved energy efficiency and at lower cost by heating the multisheet pack to its superplastic forming range below the melting point of the braze alloy, superplastically forming the pack to define braze joints having unmelted braze alloy; increasing the temperature to the braze temperature of the braze alloy, and cooling the pack below the superplastic range to freeze the braze alloy in the braze joint.

    摘要翻译: 利用我们的感应加热工作单元的独特特征,允许在宽温度范围内快速和受控地加热和冷却工件,从而将多个制造操作组合成单个加热循环,以节省时间,能源,资金,触摸人力和工厂空间 。 例如,我们可以将超塑性成形(SPF)与钎焊结合起来,这两种操作发生在温差大约在150-200°F(85-105℃)或更高的温度下,以产生高质量的部件。 或者,我们可以结合SPF与beta退火; 的钛。 最后,我们可以将成型,钎焊和退火结合成经济的单周期。 说明我们的组合循环,我们在选定的位置生产具有钎焊接头的多片SPF部件,具有更高的能量效率,并且通过将多片材包装加热到低于钎焊合金熔点的超塑性成形范围,以较低的成本,超塑性地形成包装以限定钎焊 具有未熔化的钎焊合金的接头; 将钎焊温度提高到钎焊合金的钎焊温度,并将组件冷却到超塑性范围以下,以使钎焊接头中的钎焊合金冷冻。

    Controlled strain rate forming of thick titanium plate
    5.
    发明授权
    Controlled strain rate forming of thick titanium plate 失效
    厚钛板的受控应变速率成形

    公开(公告)号:US6071360A

    公开(公告)日:2000-06-06

    申请号:US93465

    申请日:1998-06-08

    IPC分类号: C22C14/00 C22F1/18

    CPC分类号: C22C14/00 C22F1/183

    摘要: Thick plate is difficult to form because it cracks when localized strain exceeds the limits of the material. Forming thick titanium would significantly reduce manufacturing costs for finished parts by reducing machining time and by allowing standard stock blanks to be used where twelve inch thick or thicker blanks are needed today. Using finite element analysis, we model the plate forming to determine processing constraints that allow forming the thick, coarse grained alpha-beta titanium plate according to SPF principles with controlled strain rates. We form the part at an elevated temperature with a press ram. We complete the part by machining the formed plate, thereby greatly reducing machining time and material cost. Typically we bend a 20 cm thick plate to about 130.degree. with a 5-6 inch inner radius bend, or we form 2 inch thick plate with a complex curvature exceeding twelve inch depth over an area of 30.times.60 inches.

    摘要翻译: 厚板难以形成,因为当局部应变超过材料的极限时,它会发生裂纹。 通过减少加工时间,并且通过允许使用标准坯料坯料来形成厚钛将大大降低成品零件的制造成本,现在需要十二寸厚或更厚的坯料。 使用有限元分析,我们对板成型进行建模,以确定允许根据具有受控应变速率的SPF原理形成厚的粗粒α-β钛板的加工约束。 我们用压力机在升高的温度下形成零件。 我们通过加工成型板完成零件,从而大大减少了加工时间和材料成本。 通常我们用一个5-6英寸的内半径弯曲20厘米厚的板到大约130度,或者我们形成2英寸厚的板,在30×60英寸的区域上具有超过12英寸深度的复杂曲率。