Rare earth microalloyed anti-seismic and hot-rolled H-shaped steel and preparation method of H-shaped steel
A technology of micro-alloying and H-beam, applied in the field of metallurgical materials, to prevent the formation and expansion of intergranular cracks, refine the size of grains and precipitates, and have a small fluctuation range
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[0022] The technical solutions of the present invention will be described in detail below with reference to exemplary implementations. Example embodiments may, however, be embodied in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art.
[0023] The preparation method of rare earth microalloyed shock-resistant hot-rolled H-shaped steel generally includes: molten iron pretreatment→converter smelting→LF refining→VD vacuum refining→continuous casting slab→rolling. Specifically include the following steps:
[0024] 1. Converter smelting;
[0025] Control the w[S]≤0.009% of the molten iron in the converter, increase the tapping temperature of the converter to about 1600°C, and control the amount of slag dropped by the converter.
[0026] 2. LF refining;
[0027] Prolo...
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