8.Design of Rational Pouring Scheme to Ensure Mold Filling and Feeding-One of Series Courses of Speech on Scheme Design for Cast Steel in Investment Casting
9.A mixture of CO 2/1% SF 6 is used as a protective gas during melting process. The melt is homogenized with argon bubbling before pouring. The test sample plates (230 mm×40 mm×20 mm) are cast at the pouring temperature of 720 °C in a permanent mold preheating to about 250 °C.
