Automobile hot rolled steel plate with good broaching performance and low yield ratio and manufacturing method thereof
A low yield ratio, hot-rolled steel plate technology, applied in the field of steel rolling, can solve the problems of low strength, unfavorable cold stamping, low elongation, etc., and achieve the effect of high strength and excellent cold forming performance
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[0029] The following examples are used to specifically illustrate the contents of the present invention, and these examples are only general descriptions of the contents of the present invention, and do not limit the contents of the present invention.
[0030] Table 1 is the chemical composition of the steel of the embodiment; Table 2 is the specific process system of the steel of the embodiment; Table 3 is the structure and mechanical properties of the steel of the embodiment.
[0031] The chemical composition (wt, %) of the embodiment of the present invention of table 1
[0032] Example
C
Si
mn
P
S
als
Mo
Nb
V
1
0.030
1.48
1.95
0.010
0.002
0.055
0.78
0.058
0.048
2
0.039
1.36
1.80
0.006
0.003
0.037
0.72
0.045
0.035
3
0.045
1.24
1.58
0.005
0.002
0.035
0.67
0.040
0.033
4
0.052
1.05
1.25
0.008
0.002
0.030
0.65
0...
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