公开(公告)号：US09481034B2

公开(公告)日：2016-11-01

申请号：US14099474

申请日：2013-12-06

Applicant: GM Global Technology Operations LLC

Inventor： Yiqing Chen ,  Aihua A. Luo ,  Anil K. Sachdev

IPC: B22D19/00 ,  B22D19/16

CPC classification number: B22D19/0081 ,  B22D19/16

Abstract: Methods of forming bi-metallic castings are provided. In one method, a metal preform of a desired base shape is provided defining a substrate surface. A natural oxide layer is removed from the substrate surface, yielding a cleaned metal preform. The method includes forming a thin metallic film on at least a portion of the substrate surface of the cleaned metal preform, and metallurgically bonding the portion of the metal preform having the metallic film with an overcast metal to form a bi-metallic casting. The metallic film promotes a metallurgical bond between the metal preform and the overcast metal. In one aspect, the metal preform may include aluminum (Al) and the metallic film may include zinc (Zn).

Abstract translation: 提供了形成双金属铸件的方法。 在一种方法中，提供限定衬底表面的所需基底形状的金属预制件。 从衬底表面去除自然氧化物层，产生清洁的金属预制件。 该方法包括在清洁的金属预制件的基材表面的至少一部分上形成薄金属膜，并且将具有金属膜的金属预制件的部分与阴极金属冶金结合以形成双金属铸件。 金属膜促进金属预型件和阴极金属之间的冶金结合。 在一个方面，金属预成型件可以包括铝（Al），并且金属膜可以包括锌（Zn）。

公开(公告)号：US20140290894A1

公开(公告)日：2014-10-02

申请号：US14099474

申请日：2013-12-06

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Yiqing Chen ,  Aihua A. Luo ,  Anil K. Sachdev

IPC: B22D19/00 ,  B23K37/00 ,  B23K31/02

CPC classification number: B22D19/0081 ,  B22D19/16

Abstract: Methods of forming bi-metallic castings are provided. In one method, a metal preform of a desired base shape is provided defining a substrate surface. A natural oxide layer is removed from the substrate surface, yielding a cleaned metal preform. The method includes forming a thin metallic film on at least a portion of the substrate surface of the cleaned metal preform, and metallurgically bonding the portion of the metal preform having the metallic film with an overcast metal to form a bi-metallic casting. The metallic film promotes a metallurgical bond between the metal preform and the overcast metal. In one aspect, the metal preform may comprise aluminum (Al) and the metallic film may comprise zinc (Zn).

Abstract translation: 提供了形成双金属铸件的方法。 在一种方法中，提供限定衬底表面的所需基底形状的金属预制件。 从衬底表面去除自然氧化物层，产生清洁的金属预制件。 该方法包括在清洁的金属预制件的基材表面的至少一部分上形成薄金属膜，并且将具有金属膜的金属预制件的部分与阴极金属冶金结合以形成双金属铸件。 金属膜促进金属预型件和阴极金属之间的冶金结合。 一方面，金属预型件可以包括铝（Al），金属膜可以包括锌（Zn）。