It provides a preparation method of solid-liquid composite casting in a specific mold to produce the heterostructured metallic bars composed of high elastic modulus metal and low elastic modulus Mg alloy. Subsequently, the microstructure of heterogeneous Mg alloys bars is adjusted by the specific deformation and heat treatment. Heterogeneous Mg alloys bars without oxide inclusions and with good interfacial bonding were prepared through this method. The improvement of elastic modulus is obtained by tailoring the heterogeneous microstructure.

A vehicle chassis includes a pair of rear side members disposed on a rear floor of a vehicle so as to extend in a longitudinal direction of the vehicle while being spaced apart in a transverse direction of the vehicle. The pair of rear side members is manufactured in a casting process A cross member is configured to extend in the transverse direction of the vehicle and is manufactured in an extrusion process. The cross member is inserted into a mold when the rear side members are cast such that both ends of the cross member are connected to the rear side members disposed on both sides, respectively.

A method for making a braking band (2) for a brake disc (1) for a disc brake, comprising the following steps: a) preparing a mold (10) having an inner cavity (11), which comprises a first portion (11a) of a shape corresponding to the braking band (2) to be made; b) preparing a band preform (20) comprising a central layer (200) made of porous ceramic material comprising silicon carbide (SiC), an upper outer layer (201) and a lower outer layer (202), said upper outer layer (201) and said lower outer layer (202) being made of porous ceramic material comprising silicon carbide (SiC) and infiltrated with silicon (SiC+Si), said upper outer layer (201) and said bottom outer layer (202) being arranged in an opposing way and on opposite sides of the central layer (200); c) placing said band preform (20) inside the mold at the first portion (11a) of said inner cavity (11); and d) injecting a liquid or semi-solid aluminum alloy inside the entire inner cavity (11) of the mold (11) so as to infiltrate only the central layer (200) of said band preform (20) made of porous ceramic material with said aluminum alloy, obtaining at the first portion (11a) an aluminum metal matrix composite reinforced by said central preform (200) which defines the braking band (2) to be made. A braking band and a brake disc are made at least with the aforesaid method.

A process of forming an erosion, oxidation, and wear resistant shot chamber, either a gooseneck or a shot sleeve, is provided. The process utilizes a casting process for forming a one-piece shot chamber having a liner metallurgically bonded to the bulk portion of the shot chamber. Channels of predetermined shape and layout are built on the tubular external surface of the liner for facilitating thermal management of the shot chamber during die casting operations.

A multi-material hybrid forming method based on single mold opening and closing is provided. A multi-material includes a metal material such as an ultra-high-strength steel/aluminum alloy tube and aluminum/magnesium, and a non-metal material such as a fiber-reinforced resin. The ultra-high-strength steel/aluminum alloy tube is subjected to instantaneous heating, conformal gas bulging, quench hardening, injection molding, and aluminum/magnesium injection in a single mold opening and closing cycle. This greatly simplifies component manufacturing processes, eliminates subsequent welding and other processes, enables lightweight tubular beam structural components, and suits integrated manufacturing of ultra-high-strength tubular beam structures with profiled cross-sections. A multi-material component fabricated by the multi-material hybrid forming method is further provided.