nodular cast iron

Figure 1 (a) and figure 1 (b) show the hardness and strength changes of three groups of different samples respectively.

Fig. 1 shows the microstructure SEM of three groups of ductile iron samples. It can be seen from the figure

After the above WPS preparation, WPQR welding procedure qualification test shall be carried out to determine the WPS process reliability.

1. Defect analysis (1) The inner cavity of the cylinder body is a long strip-shaped sand core, and the gas

1. Defect analysis (1) The slag cleaning treatment of molten iron is not complete; (2) The results show that the

1. Defect analysis (1) There is a great difference in the wall thickness between the cylinder body and the shaft

1. Defect analysis (1) The stiffness of the base frame of the model is not enough, and the model is

The casting is molded in a box of 2 pieces, with 550 kg spheroidizing treatment package, 10 boxes and 3

1) The strength and elongation properties of y-block hot metal casting were compared. It can be seen that with the

1. Defect analysis (1) The rib plate of the cylinder body forms a grid shaped geometric hot spot with the

According to the simulation results and the experimental study of 45 ° test block, the ductile iron spent fuel container

The relationship between the number of graphite balls and the properties of 45 ° sector block is shown in Figure

Metallographic examination shall be carried out in accordance with GB / t9411. The graphite morphology and matrix structure at different

The central section of the 45 ° fan-shaped test block (as shown in Fig. 4-15) is selected for the sampling

The temperature measurement curves of different positions of 45 ° sector test block are shown in Fig. 1. The cooling