Method for manufacturing a metallic component by pre-manufactured bodies

A method for manufacturing a metallic component comprising the steps of:

• providing a capsule which defines at least a portion of a shape of the metallic component;
• arranging metallic material in the capsule;
• sealing the capsule to be gas-tight;
• and
• subjecting the capsule to Hot Isostatic Pressing for a predetermined time, at a predetermined pressure and at a predetermined temperature,
• wherein the metallic material includes at least one pre-manufactured coherent body, the pre-manufactured coherent body includes at least a portion of metallic powder consolidated such that the metallic powder is held together into the pre-manufactured coherent body,
• wherein at least one portion of the pre-manufactured coherent body is manufactured by Additive Manufacturing by sequentially superimposing layers of metallic powder,
• wherein the metallic component is a valve spindle, the valve spindle including a valve disc and a valve stem,
• wherein the capsule defines at least a portion of the valve disc, and the metallic material includes a valve seat and a core body having a core head, a cladding layer and a buffer layer arranged on the core head, and
• wherein at least one of the valve seat, the buffer layer and the cladding layer are coherent pre-manufactured bodies of metallic powder.