Steel for a plastic molding die
A technology for forming molds and plastics, which is applied in the field of steel for plastic forming molds. It can solve the problems of uneven processing of carving molds and poor precision of finishing, and achieve the effect of excellent mirror surface processing and sufficient hardness.
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[0067] Hereinafter, the present invention will be specifically described using examples.
[0068] Utilize the high-frequency induction furnace that can carry out pressurization, after smelting the steel (the steel of embodiment 1~the embodiment 16, the steel of comparative example 1~comparative example 6) of the chemical composition shown in Table 1, cast into 50kg, by heat Forged to make 60mm square bars respectively.
[0069] C
Si
mn
P
S
Ni
Cr
Mo
W
Mo+
1 / 2W
V
Al
O
N
other
Example 1
0.80
0.81
0.10
0.017
0.030
1.00
18.1
0.7
1.10
1.25
0.13
0.210
0.015
0.60
Ca=0.05
Example 2
0.71
1.00
1.70
0.026
0.021
0.53
20.0
0.4
0.20
0.50
0.69
0.440
0.008
0.71
Ti=0.13
Ex...
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