The invention discloses a smelting method, especially discloses a smelting method for controlling stainless steel inclusion, and belongs to the technical field of metallurgic production technology design. The smelting method for controlling stainless steel inclusion, provided by the invention, can effectively reduce the impurities in molten stainless steel in order to reduce the inclusion in the stainless steel blank material of a finished product. The smelting method comprises the following steps: adding a slag modifier into an AOD smelting furnace to carry out slagging, modifying ladle slag in a refining furnace, and modifying the inclusion by calcium and aluminum wires in an argon blowing environment in a vacuum furnace.

Smelting method for controlling stainless steel inclusion

The invention discloses a stainless steel high-pureness smelting method. The method comprises the following steps: under high-purity argon protection, employing electric arc for mother alloy melting,performing AOD and LF external refining, performing VD vacuum refining, and casting steel ingot to obtain a stainless steel ingot with low impurity content. The smelting is carried out through the electric arc, high-purity argon is introduced during a smelting process, alloy oxidation can be effectively prevented, penetration of an impurity element can be prevented, burning loss of a volatile element is reduced, at the same time, the P content in steel is reduced through large slag amount and multi-time slag flowing during a smelting process, and steps of LF refining, aluminum particles addition and pre-deoxidation are carried out. The preparation method is used for producing the stainless steel during an industrial production process.

Stainless steel high-pureness smelting method

The invention discloses a continuous casting production method of a titanium-containing austenitic stainless steel round tube blank for a seamless steel tube. The continuous casting production method comprises the specific steps as follows: before AOD steel blending, 5-20kg carburetant per ton of steel is added according to steel tapping components of an electric furnace, and the carbon content is not less than 2.0% at AOD initial stage; AOD is carried out; reduction desulfurization is carried out, silicoferrite is added for reduction, lime and fluorite are added for slag making desulfurization, and after the reduction desulfurization is finished, slag removal is carried out in an AOD furnace; deep deoxidization is carried out; steel tapping and titanium alloying are carried out, after the deep deoxidization is finished, the steel tapping is carried out, and ferrotitanium is added along with a steel flow in a steel tapping process; LF heating is carried out; calcium treatment is carried out, silicon-calcium wires are fed to molten steel by a wire feeding machine, and the feeding quantity of pure calcium is 0.2-0.8kg per ton of steel; soft blowing is carried out; and round blank continuous casting is carried out, after the soft blowing is finished, a steel ladle is moved to a continuous casting station for pouring, and the continuous casting round tube blank is produced by using a round blank crystallizer. With the adoption of the continuous casting production method, sequence casting is realized; the yield is increased; a forging procedure is saved; the production cost is low; and the economic benefits are high.

Continuous casting production method of titanium-containing austenitic stainless steel round tube blank for seamless steel tube

The invention discloses a manufacturing method of austenitic stainless steel [section sign]150 small-specification continuously-cast circular tube blanks, and relates to the field of stainless steel production processes. The manufacturing method includes the specific preparation process of production in an electric arc furnace; AOD, LF, continuous casting; finishing; and delivery. According to themethod, on one hand, the smelting process is optimized, it is guaranteed that molten austenitic stainless steel can achieve the high-cleanliness metallurgical quality, and while the oxygen content and the inclusion content in steel are reduced, the situation that high-melting-point aluminum oxide is gathered on a continuous casting tundish water gap to affect continuous casting pouring is reduced. On the other hand, reasonable continuous casting process parameters are determined, and reasonable primary cooling water and secondary cooling water preparation parameters, crystallizer vibration parameters, covering slag types, pouring temperature, withdrawal speed, withdrawal and straightening machine pressure, electromagnetic stirring parameters and the like are formulated. Secondary oxidization is reduced in the pouring process, and contamination of the molten steel is reduced. The continuously-cast circular tube blanks produced with the method can be directly subjected to tube penetration, round steel forging and rolling procedures are reduced, the productivity can be greatly improved, and the production cost is reduced.

Manufacturing method of austenitic stainless steel [section sign] 150 small-specification continuously-cast circular tube blanks

The invention discloses an ultra-high chromium ferrite stainless steel continuous casting manufacturing method. The manufacturing method comprises the following steps that raw materials are processedby a square billet continuous casting machine into 180*180 mm continuous casting square billets after electric arc furnace preliminary refining, AOD refining, LF furnace refining and VD furnace refining; the continuous casting drawing speed is 0.8 m/min-1.4 m/min, and the superheat degree is 15 DEG C-50 DEG C; the electromagnetic stirring intensity of a crystallizer is 500 A-550 A, the electromagnetic stirring frequency of the crystallizer is +/- 3.0 mm, the cooling water amount of the crystallizer is 95 m /h-105 m /h, the vibration frequency of the crystallizer is 150 Hz-170 Hz, and the vibration amplitude is +/-2.0 mm; protective slag adopts high-melting-rate protective slag; the continuous casting adopts an integral immersion nozzle, and the immersion nozzle adopts argon sealing operation; the foot roller water flow is controlled at (4.0+/-0.5) m /h, and the secondary cooling section water flow is controlled at (4.0+/-0.5) m /h; and the continuous casting billets are instantly placed into water after being taken off a line, the entering-water temperature is higher than or equal to 650 DEG C, and the exiting-water temperature is smaller than or equal to 100 DEG C. The ultra-high chromium ferrite stainless steel continuous casting billets are subjected to once rolling to complete material forming, the forging or rolling cogging process can be omitted, the production cycle is greatly shortened, the production cost is greatly reduced, and more than 10% of the manufacturing cost can be saved per ton of steel.

Ultra-high chromium ferrite stainless steel continuous casting manufacturing method

The invention discloses a manufacturing method of an oversized continuous casting slab of nickel stainless steel and aims to achieve the purpose of improving surface and inner quality of the continuous casting slab. To achieve the purpose, two key technical measures are taken, on one hand, reasonable chemical ingredient design is conducted, a scientific and reasonable smelting process is formulated, and it is guaranteed that the nitrogen/oxygen content in steel is lowered, and oxide inclusion in steel is reduced; on the other hand, the reasonable continuous casting pouring temperature, the casting speed and secondary cooling water distribution parameters are determined, secondary oxidation is reduced in the pouring process, contamination of steel liquid is prevented, meanwhile a reasonable process is controlled, and segregation of chemical ingredients is reduced while the surface quality of the continuous casting slab is improved. Continuous casting production changes a process route that steelmaking, die casting and forging are mainly conducted of traditional large stainless steel forging products, blank in the production field both home and abroad is filled up, production efficiency is greatly improved, the yield is raised, and the production cost is lowered.

Manufacturing method of oversized continuous casting slab of nickel stainless steel

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Manufacturing method of oversized continuous casting slab of nickel stainless steel