COMPOSITES, TOOLING AND METHODS OF MANUFACTURING THEREOF
Metal composites, tooling and methods of additively manufacturing these are disclosed. Metal objects and structures as provided herein are additively manufactured from metal having an infill pattern infiltrated with a second metal. Also provided herein are methods of forming such objects and structures. Methods include additively manufacturing a metal structure having an interior printed using an infill. Steps can further include infiltrating the printed infill of the structure with a liquid metal thereby forming a bi-metal composite.
1 . A method of manufacturing a part, comprising steps of:
printing the part comprising a first metal, wherein the first metal forms a wall substantially enclosing an interior volume and an infill portion within the interior volume of the part, the infill having a pattern defining structures and space within the interior volume; and
infiltrating the part with a second metal having a lower melting temperature than the first metal, the second melted metal substantially surrounding the infill patterned structures and filling the space within the interior volume of the part.
2 . The method of claim 1 , wherein printing the part comprises printing one or more channels within and traversing through the interior volume of the part.
3 . The method of claim 1 , wherein the first metal is steel and the second metal is copper.
4 . The method of claim 1 , wherein the first metal is steel and the second metal is magnesium.
5 . The method of claim 1 , wherein the first metal is titanium and the second metal is magnesium.
6 . The method of claim 1 , wherein the infill portion is a continuous gyroid geometry.
7 . The method of claim 6 , wherein the percent infill is about 50% to about 60% of the interior volume.
8 . The method of claim 1 , wherein the infill portion is an alternating stacked rectangular infill geometry.
9 . The method of claim 8 , wherein a percent infill is about 50% to about 60% of the interior volume.
10 . The method of claim 1 , wherein in the infiltrating step the second metal unimpededly flows through the interior volume.
11 . The method of claim 1 , further comprising applying a protectant on an outside surface of the part before infiltration.
12 . The method of claim 11 , wherein the step of applying the protectant comprises coating the outside surface of the part with a stop-braze.
13 . The method of claim 1 , wherein the infiltrating step substantially fills empty space within the interior volume.
14 . The method of claim 1 , wherein prior to the infiltrating step, comprising a step of forming one or more openings in the wall.
15 . The method of claim 1 , wherein prior to the infiltrating step, comprising a step of suspending a volume of the second metal above the one or more openings.
16 . The method of claim 1 , wherein the infiltrating step comprises heating the part with the second metal in a reducing argon atmosphere.
17 . A composite metal object, comprising:
an outer metal shell comprising a first metal defining a volume, wherein the volume comprises a patterned infill of the first metal, and
wherein the volume includes a second metal substantially surrounding the infill pattern.
18 . A metal die insert for a mold, comprising:
an outer metal shell comprising a first metal defining a volume,
wherein the volume comprises a patterned infill of the first metal, wherein the volume includes a second metal substantially surrounding the infill pattern; and
wherein one or more fluid tight channels enclosed within and traversing through the mold.
19 . The die insert of claim 18 , wherein the first metal is steel and the second metal is copper.
20 . The die insert of claim 18 , wherein the first metal is steel and the second metal is magnesium.
21 . The die insert of claim 18 , wherein the first metal is titanium and the second metal is magnesium.
22 . The die insert of claim 18 , wherein the outer shell is substantially the first metal.
23 . The die insert of claim 18 , wherein the second metal occupies empty space within any defects at an interface between the interior volume and the shell.
24 . The die insert of claim 18 , wherein the defects are pores.