Question

binder jetting: metal
use the information below to answer the question.
the metal and sand material used in the binder - jetting process are very similar. the most commonly used metal is a stainless steel powder. this powder material is best used for prototypes and aesthetic pieces.
the other metal material that is available is a stainless steel metal combined with a bronze addition. in this process, the bronze material is used to fill in the porous spaces throughout the part and will create a more functional part.
after the printer has finished treating the form and the metal part is taken out of the powder bed, the part will be in a solid form, but the process is still not fully complete. at this point, the part is in the green - state. this is when the binding agent solidifies, but the metal has not been melted together. the rest of the process includes the part being put into an oven to be sintered and melted together.
after the part is removed from the oven, some finishing and internal stress can be relieved on these finished pieces.
after the final sintering process, the part is removed from the oven and cooled. at this point, the part will be too porous to be used as a functional piece and the surface will have a grainy texture. however, this part can be infiltrated with an additional material.
why is a bronze material used with stainless steel prints in binder jetting?
it fills in the porous spaces of a part to make it stronger.
to increase the overall weight of the part.
to add a different color and shine to a part.

Explanation:

The text states that in the Binder Jetting process, bronze material is used to fill in the porous spaces of stainless - steel prints to create a more functional part.

Answer:

It fills in the porous spaces of a print to make it more functional.