Fastener steel with high strength
A fastener and high-strength technology, applied in the field of metallurgy, can solve the problems of not meeting the requirements of steel types, high cost, strength, low-temperature toughness and hardenability.
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Embodiment 1
[0018] In the specific implementation of the present invention, a high-strength fastener steel is composed of the following components in weight percentage: C 0.42%, Si 0.37%, Mn 1.08%, P 0.007%, S 0.006%, V 0.10%, B 0.0020%, O 0.0010%, and the balance is Fe.
Embodiment 2
[0020] In the specific implementation of the present invention, a high-strength fastener steel is composed of the following components in weight percentage: C0.38-0.45%, Si 0.22-0.36%, Mn 0.81-1.48%, P≤0.018%, S ≤0.010%, V≥0.10%, B0.0009-0.0024%, O≤0.0015%, and the balance is Fe.
Embodiment 3
[0022] In the specific implementation of the present invention, a high-strength fastener steel is composed of the following components in weight percentage: C0.39-0.45%, Si 0.39-0.48%, Mn 0.81-1.48%, P≤0.018%, S ≤0.010%, V≥0.10%, B0.0009-0.0024%, O≤0.0015%, and the balance is Fe.
[0023] The composition and dosage of the present invention are scientific and reasonable. The test steel developed by the present invention is carried out according to the requirements of grade 10.9, which has the largest application amount and the widest application range. The test effect is very good. It cannot be achieved when the diameter requirements are large and the cost performance requirements are high; new steel types have been developed to meet the needs of special steel in the new era. The relevant information is as follows:
[0024] In the implementation of the present invention, steels with seven components are given, and the specific components are shown in Table 1.
[0025] Table 1 ...
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