Abstract: A method for manufacturing hollow and other metal products of irregular shape provides metal powder and binding agent, and the two are feed-mixed and heated to a plastic state. The feed-mix is injected in a mold cavity of a first injection mold to form a first blank, and injected in a mold cavity of a second injection mold to form a second blank. The first blank and the second blank are welded together to form a built-up blank which is degreased to remove the binding agent therein. The degreased built-up blank is sintered to obtain the metal product of irregular shape.

Abstract: A powder feed for injection molding process includes a first metal powder, and a second metal powder. The first metal powder and the second metal powder are mixed together evenly. The second metal powder has a mass percentage of about less than 10% of a total mass of the powder feed for injection molding process. The first metal powder is resistant to the corrosion by a chemical reagent, and the second metal powder is corrodible in the chemical reagent.

Abstract: A method for manufacturing a porous metal with enhanced ability to bond to a plastic subsequently powder feed for injection molding process provides a powder feed to an injection molding process, to form a green embryo. The green embryo is sent into a sintering furnace for high-temperature sintering to obtain a blank sintered product. A chemical reagent is applied to form pores on the sintered product. The powder feed includes first and second metal powders evenly mixed. The second metal powder has a mass percentage of about less than 10% of a total mass of the powder feed for injection molding process. The first metal powder is corrosion-resistant. The second metal powder is readily corrodible.

Abstract: A method of making stainless steel includes smelting metal material and atomizing and powdering the smelted metal material to obtain a first alloy powder, detecting a mass fraction of manganese in the first alloy powder, heating and kneading the first alloy powder with plastic, and granulating, injection molding, and sintering the first alloy powder kneaded with plastic to obtain stainless steel. If the mass fraction of manganese in the first alloy powder is less than 12%, before heating and kneading with plastic, a predetermined amount of manganese-containing material is added to the first alloy powder to obtain a second alloy powder having a mass fraction of manganese of 12-15%.

Abstract: A method for manufacturing a porous metal with enhanced ability to bond to a plastic subsequently powder feed for injection molding process provides a powder feed to an injection molding process, to form a green embryo. The green embryo is sent into a sintering furnace for high-temperature sintering to obtain a blank sintered product. A chemical reagent is applied to form pores on the sintered product. The powder feed includes first and second metal powders evenly mixed. The second metal powder has a mass percentage of about less than 10% of a total mass of the powder feed for injection molding process. The first metal powder is corrosion-resistant. The second metal powder is readily corrodible.

Abstract: A method for manufacturing hollow and other metal products of irregular shape provides metal powder and binding agent, and the two are feed-mixed and heated to a plastic state. The feed-mix is injected in a mold cavity of a first injection mold to form a first blank, and injected in a mold cavity of a second injection mold to form a second blank. The first blank and the second blank are welded together to form a built-up blank which is degreased to remove the binding agent therein. The degreased built-up blank is sintered to obtain the metal product of irregular shape.