400 MPa-level tungstenic corrosion-resistant twisted steel and preparation method thereof
A threaded steel bar, 400mpa technology, applied in the field of alloy steel, can solve the problems of limited lifting, achieve simple operation, improve seawater corrosion resistance, good strength and plasticity
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Embodiment 1
[0024] The reinforcing bar of the present embodiment, each component is as shown in table 1, and its preparation method is:
[0025] The hot metal is desulfurized by the KR method to ensure that the sulfur content in the steel is controlled below 0.01%. Electric furnace smelting, using side blowing for decarburization and dephosphorization, smelting at 1655°C until the carbon content in molten steel is less than 0.05%, and the phosphorus content is less than 0.01%, tapping, adding ferrosilicon, Silicon-manganese alloy deoxidation, adding carbon powder and slagging material; after adding Cr alloy elements, use RH vacuum refining at 1625 °C to carry out oxygen blowing decarburization, and then use LF refining at 1595 °C to deoxidize until the oxygen content in molten steel is 0.002%, add W and other alloying elements after deoxidation; after refining, adopt protective casting, and continuously cast into 150mm×150mm billets; Single-strand rolling, the rolling specification is ∮2...
Embodiment 2
[0027] The reinforcing bar of the present embodiment, each component is as shown in table 1, and its preparation method is:
[0028] The hot metal is desulfurized by the KR method to ensure that the sulfur content in the steel is controlled below 0.01%. Electric furnace smelting, using side blowing for decarburization and dephosphorization, smelting at 1665°C until the carbon content in molten steel is less than 0.06%, and the phosphorus content is less than 0.01%, tapping, and adding ferrosilicon, Silicon-manganese alloy deoxidation, adding carbon powder and slagging material; after adding Cr alloy elements, use RH vacuum refining at 1635 °C to carry out oxygen blowing decarburization, and then use LF refining at 1605 °C to deoxidize until the oxygen content in molten steel is 0.002%, add W and other alloying elements after deoxidation; after refining, adopt protective casting, and continuously cast into 150mm×150mm billets; Single-strand rolling, the rolling specification i...
Embodiment 3
[0030] The reinforcing bar of the present embodiment, each component is as shown in table 1, and its preparation method is:
[0031] The hot metal is desulfurized by the KR method to ensure that the sulfur content in the steel is controlled below 0.01%. Electric furnace smelting, using side blowing for decarburization and dephosphorization, smelting at 1675°C until the carbon content in the molten steel is less than 0.06%, and the phosphorus content is less than 0.01%, tapping, adding ferrosilicon, Silicon-manganese alloy deoxidation, adding carbon powder and slagging material; after adding Cr alloy elements, use RH vacuum refining at 1645 °C to carry out oxygen blowing decarburization, and then use LF refining at 1615 °C to deoxidize until the oxygen content in molten steel is 0.002%, add W and other alloying elements after deoxidation; after refining, adopt protective casting, and continuously cast into 150mm×150mm billets; Single-strand rolling, the rolling specification is ...
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