B - Operations – Transporting – 21 – J
Patent
B - Operations, Transporting
21
J
B21J 1/00 (2006.01) B22D 18/02 (2006.01) C22C 1/00 (2006.01)
Patent
CA 2076462
64881-410 METHOD OF FORMING SEMI-SOLIDIFIED METAL COMPOSITION ABSTRACT OF THE DISCLOSURE When a semi-solidified metal composition is formed in a forging die assembly, it is formed under conditions satisfying particular mass fraction solid and flowing rate in the die and then held under a given pressure until the metal composition is completely solidified. According to the invention, a starting material is formed under conditions that a mass fraction solid of the starting material at a time of starting the forging is 0.2-0,8 and a flowing rate of the starting material in a filling region of a die assembly is not less than 3.5 m/sec and then held under a pressure of not less than 6 kg/mm2 until the starting material is completely solidified after the filling in the die assembly. By this method, a macrosegregation is avoided and a structure having a uniform composition can be obtained.
Moritaka Mitsuru
Shinya Sadahiko
Takebayashi Katsuhiro
Yahata Seiro
Yoshida Chisato
Rheo-Technology Ltd.
Smart & Biggar
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