600-MPa grade vanadium-containing high-strength hot-rolled steel bar and production method thereof
A production method and technology for steel bars, applied in the field of metallurgical steelmaking and processing, can solve the problems of large energy consumption, rising connection costs, large alloy consumption, etc., and achieve the effects of reducing costs, reducing the density of reinforcement, and saving resources.
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[0020] Example 1
[0021] The mass percentage of each component in the steel is: 0.23% C, 0.42% Si, 1.42% Mn, 0.091% V, 0.0137% N, 0.021% S, 0.030% P, the rest is Fe and unavoidable impurities. 100-ton converter vanadium extraction, 100 converter and LF refining process for vanadium slag alloying and addition of vanadium nitride alloy, full nitrogen blowing, billet continuous casting, soaking, high-pressure water dephosphorization, bar mill rolling (opening temperature 990 ℃, finishing temperature 910℃), light penetration of water, natural cooling and shearing by cooling bed.
[0022] The mechanical properties, forming properties and microstructure of the resulting steel bars are shown in Table 1.
[0023]
[0024]
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[0025] Example 2
[0026] The mass percentage of each component in the steel is: 0.22% C, 0.47% Si, 1.40% Mn, 0.103% V, 0.0159% N, 0.027% S, 0.032% P, the rest is Fe and unavoidable impurities. 100-ton converter vanadium extraction, 100 converter and LF refining process for vanadium slag alloying and addition of vanadium iron and manganese nitride alloys, full nitrogen blowing, billet continuous casting, soaking, high-pressure water dephosphorization, bar mill rolling (Open rolling temperature 1020℃, finishing rolling temperature 950℃), light water penetration, natural cooling and shearing by cooling bed.
[0027] The mechanical properties, forming properties and microstructure of the obtained steel bars are shown in Table 2.
[0028]
[0029]
Example Embodiment
[0030] Example 3
[0031] The mass percentage of each component in the steel is: 0.24% C, 0.53% Si, 1.47% Mn, 0.112% V, 0.0174% N, 0.025% S, 0.023% P, the rest is Fe and unavoidable impurities. 100-ton converter vanadium extraction, 100-ton converter and LF refining process for vanadium slag alloying and addition of iron vanadium nitride, iron vanadium and manganese nitride alloy, nitrogen blowing throughout the process, billet continuous casting, soaking, high-pressure water phosphorus removal, Bar mill rolling (open rolling temperature 1060℃, finishing temperature 970℃), light water penetration, natural cooling and shearing by cooling bed.
[0032] The mechanical properties, forming properties and microstructure of the resulting steel bars are shown in Table 3.
[0033] .
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