Forged dissimilar metal assembly and method

Details Forged dissimilar metal assembly and method Forged dissimilar metal assembly and method

B - Operations, Transporting

22

F

13/22

B22F 7/00 (2006.01) B21K 25/00 (2006.01)

Patent

CA 1227911

ABSTRACT A mechanically rigid joint is formed between two different metals by completing the joint in a forging operation. A part (14) made of one metal is placed in a die form (20) and is maintained at a temperature below that required for forging. A billet (23) made of the material from which the second part (13) is to be formed is placed in the die (20) so that the billet (23) can be formed into the second part (13), engaging the first part (14) at an interface (16) defining the joint. The joined parts (13, 14) are then machined into their final shape. The joint (16) is stabilized by maintaining appropriate temperatures of the materials to compensate for expansion and contraction after forging, and by providing suitable coatings for the materials, particularly at the interface (16). Advantages include reduction in weight and increased stability of a final assembled component because the two parts are joined without the use of fasteners or other conventional techniques. (Reads on Figure 2)

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