Rare earth heavy rail steel rare earth adding method and rare earth heavy rail steel
A technology for heavy rail steel and rare earth is applied to the rare earth adding method of rare earth heavy rail steel and the field of rare earth heavy rail steel, which can solve the problems of difficulty in realizing rare earth application, aggravating the anisotropy of rolled materials, and uneven distribution of rare earth, and reducing oxygen content, promoting uniform distribution and improving yield
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Embodiment 1
[0021] The rare earth adding method of the rare earth heavy rail steel provided by the present embodiment comprises the following steps:
[0022] The U75V heavy rail steel is sequentially subjected to LF refining and VD refining until the oxygen content in the molten steel is ≤10ppm, and the rare earth iron alloy with a rare earth content of 99wt% is added to the molten steel by the direct input method;
[0023] The specific input methods of the above-mentioned direct input method are as follows:
[0024] (1) Use high-quality iron sheets to seal and wrap the rare earth ferroalloys before adding them, and strictly avoid rust and moisture on the iron sheets;
[0025] (2) Before adding, close the argon gas system of the ladle to keep the liquid steel level stable; use a crane to hang the rare earth ferroalloy to be added, and gradually turn on the argon gas system of the ladle to gradually remove the slag on the surface of the molten steel Blow open to an area with a diameter of...
Embodiment 2
[0029] The rare earth adding method of the rare earth heavy rail steel provided by the present embodiment comprises the following steps:
[0030] The U76CrRe heavy rail steel is sequentially subjected to LF refining and VD refining until the oxygen content in the molten steel is ≤10ppm, and the rare earth aluminum alloy with a rare earth content of 99.2wt% is added to the molten steel by the direct input method;
[0031] The specific input methods of the above-mentioned direct input method are as follows:
[0032] (1) Use high-quality iron sheets to seal and wrap the rare earth aluminum alloy before adding, and strictly avoid rust and moisture on the iron sheets;
[0033] (2) Before adding, close the argon gas system of the ladle to keep the liquid steel level stable; use a crane to hang the rare earth aluminum alloy to be added, and open the argon gas system of the ladle gradually from small to large, and gradually reduce the surface of the molten steel The slag is blown int...
Embodiment 3
[0037] The rare earth adding method of the rare earth heavy rail steel provided by the present embodiment comprises the following steps:
[0038] The BGREⅢ heavy rail steel of Baotou Steel’s third-generation rare earth rail is sequentially LF refined and VD refined until the oxygen content in the molten steel is ≤10ppm, and the rare earth copper alloy with a rare earth content of 99.3wt% is added to the molten steel by the direct input method;
[0039] The specific input methods of the above-mentioned direct input method are as follows:
[0040] (1) Use high-quality iron sheets to seal and wrap the rare earth copper alloy before adding, and strictly avoid rust and moisture on the iron sheets;
[0041] (2) Before adding, turn off the argon gas system of the ladle to keep the liquid steel level stable; use a crane to hang the rare earth copper alloy to be added, and open the argon gas system of the ladle gradually from small to large, and gradually remove the liquid on the surfa...
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