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Method for producing wheel steel by adopting LF-RH refining process

A kind of wheel steel and process technology, which is applied in the field of wheel steel production by LF+RH refining process, can solve the problem of easily exceeding the standard of inclusions, and achieve the effect of being conducive to fully floating and ensuring the sedation time.

Active Publication Date: 2015-03-25
SHOUGANG CORPORATION
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  • Claims
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Problems solved by technology

[0003] Chinese patent 200710158965 is titled "A Wheel Steel and Its Smelting Method". It adopts LF refining process. The LF refining furnace uses silicon aluminum barium strontium calcium deoxidizer. The wheel steel produced by this process has B and D inclusions that easily exceed the standard

Method used

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  • Method for producing wheel steel by adopting LF-RH refining process
  • Method for producing wheel steel by adopting LF-RH refining process

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Embodiment 1

[0036] The specific implementation process is single pouring and 2 furnaces are produced at a time, and a certain type of wheel steel is produced by using the converter "two-step method" smelting-LF-RH refining-continuous casting' process route, and its final composition is shown in Table 1.

[0037] Soft blowing starts at the end of LF refining. The control parameters of LF and RH processes are shown in Table 1, and the rating results of inclusions in steel coils are shown in Table 2.

[0038] Table 1 Some parameters of LF-RH treatment process

[0039]

[0040] Table 2 Classification results of inclusions in steel coils

[0041]

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Abstract

The invention belongs to the technical field of steel making, and provides a method for producing wheel steel by adopting an LF-RH refining process. The wheel steel produced through the method comprises the following chemical components in percentage by weight: 0.08%-0.10% of C, less than or equal to 0.05% of Si, 0.80%-1.00% of Mn, less than or equal to 0.020% of P, less than or equal to 0.006% of S, 0.020%-0.050% of Als, less than or equal to 0.0060% of N and the balance of Fe and inevitable impurities. The adopted process flow comprises the following steps of molten iron KR desulfurization, dephosphorizing rotary furnace smelting, decarburizing rotary furnace smelting, LF refining, RH refining and continuous casting. The wheel steel produced by adopting the method disclosed by the invention has the advantage that various impurities of more than 98% of steel coil can be controlled to be 1.0 grade or below under the condition of ensuring that the components of molten steel are qualified.

Description

technical field [0001] The invention belongs to the technical field of steelmaking and provides a method for producing wheel steel by LF+RH refining process. Background technique [0002] With the continuous improvement of customers' requirements on product quality, facing higher and higher requirements for inclusion control, how to stably control inclusions at a lower level requires fine operation while process control. [0003] Chinese patent 200710158965 is titled "A Wheel Steel and Its Smelting Method". It adopts LF refining process. The LF refining furnace uses silicon aluminum barium strontium calcium deoxidizer. The wheel steel produced by this process has B and D inclusions that easily exceed the standard . Contents of the invention [0004] The purpose of the present invention is to provide a method for producing wheel steel by LF+RH refining process. Under the condition of ensuring that the composition of molten steel is qualified, all kinds of inclusions in mor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C5/28C21C7/10C21C7/064C22C38/06
Inventor 唐德池高圣勇崔阳邵肖静朱国森田志红肖宝亮张大伟季晨曦王朝斌王志鹏李永林曾智
Owner SHOUGANG CORPORATION
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