Patent ID: 11872647
Assignee: JX METALS CORPORATION
Field: Materials, metallurgy (Chemistry)
Classification: CPC B  Y | IPC B

Claim 0:
1. A production method of an additive manufactured object according to an EB-based (Electron Beam based) additive manufacturing method of spreading a pure copper powder, preheating the pure copper powder and thereafter partially melting the pure copper powder by scanning the pure copper powder with an electron beam, solidifying the pure copper powder to form a first layer, newly spreading the pure copper powder on the first layer, preheating the pure copper powder and thereafter partially melting the pure copper powder by scanning the pure copper powder with the electron beam, solidifying the pure copper powder to form a second layer, and repeating the foregoing process to add layers, wherein the pure copper powder is the pure copper powder with a Si coating formed thereon in which a Si adhesion amount is 5 to 200 wtppm, a C adhesion amount is 15 wtppm or more, and a weight ratio C/Si is 3 or less, and wherein the preheating temperature is set to be 400° C. or higher and less than 800° C.