A method for producing a silicon based alloy having between 45 and 95% by weight of Si; max 0.05% by weight of C; 0.01-10% by weight of Al; 0.01-0.3% by weight of Ca; max 0.10% by weight of Ti; 0.5-25% by weight of Mn; 0.005-0.07% by weight of P; 0.001-0.005% by weight of S; the balance being Fe and incidental impurities in the ordinary amount.

Please cancel the abstract of this application and replace it with the following amended abstract presented in clean form according to the procedures outlines in MPEP 714 (II) (B):

A corrosion-resistant steel bar and a preparation method, in percentage by weight, the corrosion-resistant steel bar comprises 0.03% to 0.15% of C, 0.8% to 2.0% of Si, 0.8% to 2.0% of Mn, 0.10% to 0.50% of Cu, 0.08% to 0.2% of P, 0.005% to 0.01% of S, 0 to 0.1% of Nb, 0 to 0.2% of V, 0 to 0.1% of Ti, 0 to 0.1% of Al, and the balance of Fe and inevitable impurities; wherein, 0.6Si/Mn2.0, 0.25%(Cu+P+S)0.62%. Through the design of Si, Mn, Cu, P, S and other alloying elements, considering the strengthening function and corrosion resistance function of each element, the present application solves the problem that the corrosion resistance, mechanical properties and cost of the prior art cannot be achieved together, and overcomes the technical bias in the prior art that Cr, Ni or Mo must be added for improving the corrosion resistance.

The invention discloses a preparation method for a vanadium-nitrogen alloy, which comprises the following steps: a, adding ammonium vanadate into a first rotary kiln for heating and deamination to obtain a thermal vanadium oxide and a mixed gas 1; b, adding the thermal vanadium oxide into a second rotary kiln, for heating and reducing in a first protective atmosphere to obtain a vanadium oxynitride and a mixed gas 2; c, mixing a graphite powder and the vanadium oxynitride in a ratio of K:1 by mass percentage to form a mixture, and mixing and molding the mixture to obtain a dried raw meal block, wherein the vanadium oxynitride has an oxygen content of 4%-20%, and the oxygen content is divided into n intervals, and the K value is in direct proportion to the oxygen content in each interval; and d, sending the dried raw material block into a calcining kiln for carbothermal reduction and nitridation in a second protective atmosphere to obtain a vanadium-nitrogen alloy and a mixed gas 3. The method uses vanadium oxynitride to prepare vanadium-nitrogen alloy, which has the advantages of low dosage of carbonaceous reducing agent and reduced carbon emission, and realizes low-carbon and efficient preparation of the vanadium-nitrogen alloy.

Exemplary articles may comprise a surface alloyed layer, a base metal comprising a steel, and a transitional layer between the surfaced alloyed layer and the base metal. The surface alloyed layer may comprise nickel (Ni), chromium (Cr), manganese (Mn), molybdenum (Mo), silicon (Si), or combinations thereof. Exemplary methods of making an article may comprise coating a portion of a sand mold with a metal slurry, pouring a molten steel alloy onto the sand mold, and removing the article from the sand mold.

A method for producing low-carbon ferromanganese capable of achieving a high Mn yield. In producing low-carbon ferromanganese by blowing an oxidizing gas from a top-blowing lance onto a bath face of high-carbon ferromanganese molten metal accommodated in a reaction vessel provided with a top-blowing lance and bottom-blowing tuyere to perform decarburization, the slag composition during the blowing is adjusted so that a value of (CaO+MgO)/(Al.sub.2O.sub.3+SiO.sub.2) on a mass basis in the slag composition is not less than 0.4 but not more than 5.0. Also, agitation is performed under a condition that an agitation power density of an agitation gas blown through the bottom-blowing tuyere is not less than 500 W/t.