Niobium titanium -combined microalloying steel for cooling-control reinforced bar and method for producing same
A technology of microalloying and production methods, applied in temperature control, metal rolling, etc., to achieve good performance and benefit the rational and balanced application of resources
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[0012] The present invention is further illustrated by the following examples. The embodiment adopts the conventional smelting method, according to the elements and contents specified by each specification in Table 1, smelting and continuous casting into a 150mm billet in a converter; adopts a general continuous bar rolling mill, controls the heating temperature of the billet to 1050-1250 ℃, and rolls it at a temperature above 950 ℃. system completed. Controlled cooling, rapid water-cooling cooling of steel bars after rolling, control the temperature of the upper cooling bed in the range of 800-1050 ° C, and then natural cooling, shearing, bundling, and storage. Its process parameters and properties are listed in Table 2.
[0013] The relative amount of the steel bar sample was measured by the truncation method, and no less than 50 response fields were measured under a 100-fold full-phase microscope. The relative amount of the structure of the steel bar samples is shown in T...
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