Rare earth heat-resistant stainless steel continuous casting method

A heat-resistant stainless steel and continuous casting technology, applied in the field of steelmaking technology, can solve problems such as affecting casting, unstable pulling speed, and nozzle drift, and achieve the effect of stable production process and good surface quality.

CN110846591BActive Publication Date: 2021-03-02SHANXI TAIGANG STAINLESS STEEL CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2021-03-02

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Abstract

The invention discloses a rare-earth heat-resistant stainless steel continuous casting method, which comprises: selecting an alloy steel with a preset mass percentage. Feed pure Ce rare earth wire into the molten steel in the LF refining furnace, and the feeding amount is determined according to the weight of the molten steel. After the wire feeding is finished, carry out argon blowing and stirring. Seal the contact surface between the tundish cover and the tundish with refractory mud, and seal all the openings on the tundish with ceramic fiber boards, inject argon gas to exhaust the air in the tundish. The continuous casting ladle is poured, and the amount of molten steel in the tundish and the temperature of molten steel are controlled within the preset range. Open the tundish stopper mechanism to pour molten steel into the crystallizer, and start the continuous casting machine to draw steel after casting for a preset time. The crystallizer vibration parameters of the drawn steel are amplitude ±2.69mm, negative slip time 0.129s, mold flux viscosity 0.15‑0.20Pa.s, and binary basicity controlled at 0.85‑0.95. The rare earth heat-resistant stainless steel continuous casting method of the present invention realizes the continuous casting production of steel grades with a rare earth content of more than 0.03% in the steel, can realize continuous casting of two furnaces, and can roll a cold plate with a thickness of less than 3mm, and has good surface quality.
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Description

technical field

[0001] The invention relates to the technical field of steelmaking technology, in particular to a method for continuous casting of rare earth heat-resistant stainless steel. Background technique

[0002] Rare earth heat-resistant stainless steel is a new type of alloy steel obtained by adding rare earth elements to steel. By adding rare earth elements to the stainless steel, the inclusions in the stainless steel can be denatured and the harm of the inclusions can be reduced. Secondly, let the rare earth occupy the effective space of the grain boundary, prevent the entry of other impurities, and reduce the segregation of harmful elements at the grain boundary. At the same time, rare earth can also refine grains and control the purity of grain boundaries in steel. Therefore, rare earth heat-resistant stainless steel has better high-temperature creep strength and high-temperature durability than ordinary heat-resistant stainless steel. It is widely used in me...

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Embodiment Construction

[0018] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with specific embodiments of the present invention and corresponding drawings. Apparently, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts fall within the protection scope of the present invention.

[0019] The technical solutions provided by the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0020] The embodiment of the present invention provides a rare earth heat-resistant stainless steel continuous casting method, as shown in the attached figure 1 As shown, the method includes:

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