Manufacturing method of plastically formed product

A method of manufacturing a plastically formed product by processing chips of waste metal, comprising the sequential steps of:

• (a) processing a waste metal article to produce chips of metal,
• (b) extruding said chips of metal to form an extruded material;
• (c) carrying out on said extruded material after said extruding step is completed a solution treatment with a diffusion effect to produce self-diffusion of metallic atoms in said extruded material, and
• (d) plastically working said extruded material to form said plastically formed product.

A method of manufacturing a magnesium alloy-based material having good forgeability for forging by processing chips of magnesium alloy of a small needle-like shape made from waste metal, comprising the sequential steps of:

• (a) processing a waste metal article containing magnesium alloy to produce chips of magnesium alloy of a small needle-like shape;
• (b) compacting said chips of magnesium alloy;
• (c) extruding said compacted chips to form an extruded material, said extruding step being carried out so that said chips are axially oriented in the direction of extrusion and are adhered to one another;
• and
• (d) carrying out a diffusion treatment on said extruded material after said extruding step is completed to produce self-diffusion of metallic atoms in said extruded material so as to form said material for forging, whereby said metallic atoms in a surface area of each of said oriented chips are diffused so that said chips are tightly adhered to one another in said material for forging.

A method of manufacturing a magnesium alloy-based material having good forgeability for forging by processing chips of magnesium alloy of a small needle-like shape made from waste metal, comprising the sequential steps of:

• (a) processing a waste metal article containing magnesium alloy to produce chips of magnesium alloy of a small needle-like shape;
• (b) filling a container with said chips of magnesium alloy;
• (c) compacting said chips filled in said container;
• (d) sealing said container with a lid and then vacuum extracting said container;
• (e) extruding said chips and said container together to form an extruded material;
• and
• (f) carrying out a diffusion treatment on said extruded material after said extruding step is completed to produce self-diffusion of metallic atoms in said extruded material to form said material for forging.

A method of manufacturing a forged product by forging an extruded material which is produced by processing waste metal chips, comprising the sequential steps of:

• (a) providing an extruded material which has been prepared by compacting waste metal chips and extruding said chips to form said extruded material;
• (b) carrying out a diffusion treatment on said extruded material after said extruding step is completed to produce self-diffusion of metallic atoms in said extruded material to form said material for forging;
• and
• (c) forging said extruded material so as to have a predetermined shape thus to form said forged product.