Ductile iron punch disc casting

C	Si	Mn	P	S	Cu	Sb	Mgincomplete
3.43	2.09	0.42	0.020	0.010	0.65	0.005	0.045

According to the above process, the test results of chemical composition, mechanical properties and microstructure of ductile iron punch disc are shown in Table 1, table 2 and figure 1.

Performance	Tensile strength /MPa	Elongation (%)	Graphite grade	Spheroidization rate
Requirement	≥ 420	≥ 5	≥ 4 grade	≥ 90
Actual	535	5.5	6 grade	95.42

The test results show that the performance of the disc cast test block attached to the ductile iron punch meets the technical requirements, and the first piece is verified to be free of casting defects by machining. The finished disc of the ductile iron punch is shown in Figure 2, and its casting process is finally solidified after passing the process evaluation.