3d printed metal with controlled carbide size and method of producing the same

A method of additively manufacturing a product made of at least one alloy in a free forming apparatus having a chamber, wherein the alloy is based on iron, cobalt or nickel;

• and wherein the method comprises:
• a. arranging a layer of a powder of the alloy in the chamber;
• b melting the powder by exposing the powder to an energy beam in accordance with a digital representation of the product and how the product is to be produced;
• c. letting the melted powder solidify;
• and
• d. repeating the steps a, b, and c in accordance with the digital representation such that at least a part of the product is manufactured,
• wherein the digital representation of the product comprises at least a portion of the product, the portion comprising a first and a second sub-portion, wherein the first and the second sub-portion share a common border,
• wherein the representation of how the product is to be produced comprises instructions for the free forming apparatus to apply, to the portion, an energy beam with one or more corresponding heating parameters, wherein the energy beam is to be applied with a first set of the heating parameters to the first sub-portion and with a second set of the heating parameters to the second sub-portion,
• wherein the first set of the heating parameters result in the application of a first volumetric energy density to the first sub-portion and a second volumetric energy density to the second sub-portion, wherein the first volumetric energy density differs by at least a factor 2 from the second volumetric energy density.