| 摘要 |
PURPOSE:To increase the temp. on the top surface of a skid button and to decrease skid marks by forming the button in such a way that a heat resistant fiber material is interposed in the heat resisting steel formed into a prescribed shape. CONSTITUTION:A heat resistant fiber material 6 is inserted and attached into the holding groove 12 provided on the inside surface of a band part 11 which closes both ends of a casting mold 10 having approximately the same shape as the shape of a skid button and said material is held in a prescribed shape. The material 6 is constituted of fiber of ternary elements of alumina, boron oxide and silica. The melt of an ultraheat resisting steel 8 is charged into the mold 10 through the feed port 13 thereof and the mold 10 is rotated to inject forcibly the molten metal into the mold through the gratings of the material 6 by centrifugal force. The melt of a low grade heat resisting steel 9 is then fed into the mold and a casting body having a fiber reinforced alloy layer is obtd. The surface of such casting body is cut and removed to form a skid button 5 having a prescribed shape. Such skid button is attached to a cooling pipe 2 by welding a stopper metal 4 thereto. |
