Patent ID: 8911571

Claim:
A method for casting a metal article, the method comprising providing an enclosed area comprising a traction bar configured to move at a continuous casting speed, wherein the enclosed area is kept at a substantially constant ambient temperature of −190° C. and a pressure of 1 Bar; ejecting liquid nitrogen to cool a portion of the traction bar located at the outlet of an hot casting mould; wherein the liquid nitrogen is ejected at a rate sufficient to maintain a predetermined cooling rate over a selected time interval when molten metal is extruded from the hot casting mould onto the traction bar; extruding molten metal from the outlet of the hot casting mould onto the traction bar to form a solidified metal portion, wherein the traction bar is moved as the molten metal is extruded to maintain a continuous casting speed within the selected time interval; cutting the solidified metal portion to form the metal article.