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    • 2. 发明授权
    • Dual-alloy disk system
    • 双合金盘系统
    • US5106012A
    • 1992-04-21
    • US225907
    • 1988-07-29
    • John M. HyzakTimothy E. HowsonWilford H. Couts, Jr.Steven H. ReichmanHugo E. DelgadoDaniel D. KrugerMichael E. SaubySulekh C. JainBruce P. BardesRichard G. MenziesSwami Ganesh
    • John M. HyzakTimothy E. HowsonWilford H. Couts, Jr.Steven H. ReichmanHugo E. DelgadoDaniel D. KrugerMichael E. SaubySulekh C. JainBruce P. BardesRichard G. MenziesSwami Ganesh
    • B21J5/00B21K1/32F01D5/02
    • B21K1/32B21J5/00F01D5/02Y10S72/70Y10T29/49316Y10T29/4932
    • Two pieces of metal are bonded together at a surface by placing the two pieces into contact at the surface and forging the two pieces in a die which causes substantial displacement of the metal originally at the surface in a direction parallel to and outwardly from the edges of the surface. In this way, many of the defects which are potentially present at the original surface are displaced with moving metal away from the original contact between the two pieces of metal into sacrificial ribs and the remaining defects are exposed to significant strain. A portion of the displaced metal which contains many of the defects and which forms the sacrificial ribs is removed from the resulting bonded work piece as the sacrificial ribs are removed from the work piece. The result is a bond with superior properties and with a bond surface which can be located very precisely. This system is particularly appropriate for forming dual-alloy high-pressure turbine disks for gas turbines in which an annular peripheral ring of a second super-alloy is bonded to a central core of a first super-alloy. The system is particularly effective if, prior to forging, surfaces to be bonded are closely shape-conforming, are very clean, and are diffusion-bonded using hot isostatic pressing while the surfaces are gas-free. The sacrificial ribs are formed by vents in the impression of the forging dies. The vents are adjacent to the outer edges of the bond surface. The system may be accomplished by using one or more strikes of the same dies, or may include multiple strikes in which only one side of the bond is vented during each strike.
    • 两块金属在表面上通过将两个部件在表面上接触并且将两个部件锻造在模具中而在一个表面上结合在一起,该模具使原来在表面处的金属在平行于和向外从 表面。 以这种方式,可能存在于原始表面的许多缺陷被移动的金属从两块金属之间的原始接触件移开到牺牲肋中,并且剩余的缺陷暴露于显着的应变。 当牺牲肋从工件上移除时,包含许多缺陷并形成牺牲肋的位移金属的一部分从所得到的粘合工件中被去除。 结果是具有优异性能和可以非常精确地定位的粘结表面的粘结。 该系统特别适用于形成用于燃气轮机的双合金高压涡轮盘,其中第二超合金的环形外围环结合到第一超级合金的中心芯。 如果在锻造之前,要结合的表面紧密形状,非常干净,并且在表面无气体时使用热等静压进行扩散粘合,该系统是特别有效的。 牺牲肋由锻造模具的印模形成。 通风口与接合表面的外边缘相邻。 该系统可以通过使用相同模具的一个或多个冲击来实现,或者可以包括多次冲击,其中在每次冲击期间仅释放粘结件的一侧。