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Core-spun yarn product for conducting bulk material wire feeding treatment on molten steel and processing method of core-spun yarn product

A processing method and cored wire technology, applied in the field of metallurgy, can solve the problems of internal air residue, loose and not dense materials, etc.

Pending Publication Date: 2021-11-16
MAANSHAN XINGDA METALLURGICAL NEW MATERIAL +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] Aiming at the problems of loose and uncompacted materials and a large amount of residual air in the existing bulk material cored wire for molten steel feeding processing, the present invention provides a cored wire product for bulk material feeding processing of molten steel and its processing method

Method used

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  • Core-spun yarn product for conducting bulk material wire feeding treatment on molten steel and processing method of core-spun yarn product
  • Core-spun yarn product for conducting bulk material wire feeding treatment on molten steel and processing method of core-spun yarn product
  • Core-spun yarn product for conducting bulk material wire feeding treatment on molten steel and processing method of core-spun yarn product

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] In this example, a cored wire having a diameter of 13 mm was produced. When carrying out extrusion processing of notch 410, the distance l from the extrusion processing point to the sealing point is set to be 145mm (approximately l=11D 0 ). Take the 10.0m finished cored wire and divide it into five sections of 2.0m each, weigh the core material in each section, measure the diameter (outer diameter) of each section and convert the equivalent diameter, the result is:

[0051]

[0052]

Embodiment 2

[0057] In this example, a cored wire having a diameter of 13 mm was produced. When carrying out extrusion processing of notch 410, the distance l from the extrusion processing point to the sealing point is set to be 145mm (approximately l=11D 0 ). Take 20.0m of finished cored wire and evenly divide it into ten sections of 2.0m each, and weigh the bulk materials in each section as follows:

[0058] serial number 1 2 3 4 5 6 7 8 9 10 average standard deviation Weight (g) 179 181 181 180 181 179 179 180 180 181 180.1 0.876

Embodiment 3

[0066] In this embodiment, calcium treatment is carried out on molten steel, and a cored wire with an outer diameter of 10 mm is made of silicon-calcium powder with calcium and silicon contents of 30% and 55% respectively. The particle size of the core material is not greater than 1.5 mm. The low carbon steel strip is a single layer with a thickness of 0.55mm.

[0067] It is manufactured by the processing method of the present invention. After the cored wire is encapsulated, it is locally pressed and rounded by rollers along the axial direction, and a concave groove is formed at the pressed place of the shell. The cored wire is fed into the ladle with a liquid steel volume of 130 tons at a speed of 1.8m / sec in the late stage of ladle furnace refining. The wire feeding process is basically stable, and there is no obvious phenomenon of molten steel churning and ladle top slag being involved. After the ladle is blown with argon and stirred weakly, 18ppm of calcium is finally adde...

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Abstract

The invention discloses a core-spun yarn product for conducting bulk material wire feeding treatment on molten steel and a processing method of the core-spun yarn, and belongs to the technical field of metallurgy. According to the core-spun yarn product and the processing method thereof, when the product is processed, a tubular container steel shell which is subjected to loading and sealing of bulk inner core materials is locally and continuously extruded in the axial direction, and the sunken steel shell cross section formed in the extruded part is subjected to diameter reducing rounding, so that the cross section of the product is reduced due to the fact that the product is provided with a local notch, the internal material filling compactness is high, the contact density with the shell is large, and the internal gas content is low. By adopting the technical scheme of the core-spun yarn product, the sealing time of the shell can be prolonged, rapid evaporation of gas is effectively inhibited, and evaporation and oxidation loss of magnesium or / and calcium are reduced, so that the yield of alloying or inclusion modification treatment elements in steel when a wire feeding process is adopted is improved and stabilized, meanwhile, the pollution to the molten steel and the harm to the field environment during wire feeding (especially magnesium or / and calcium treatment) are reduced.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and more specifically relates to a cored wire product and a processing and using method for feeding molten steel with bulk materials (reactive or non-reactive), aiming at improving the internal The quasi-volume density of the cavity bulk material reduces the residual air inside, promotes the heat absorption of the internal material, prolongs the melting time of the outer shell and promotes the reaction of the reactive material. The cored wire product and its processing method. Background technique [0002] Feeding the molten steel through the cored wire is a method of adding inner core materials in the refining process (especially at the end of refining) widely used in the molten steel refining process, which can avoid the adverse effects of ladle top slag on feeding, And it can directly add the material into the depth of the molten steel to increase the yield of the molten steel to the materi...

Claims

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Application Information

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IPC IPC(8): C21C7/00
CPCC21C7/0056
Inventor 乌力平李国安
Owner MAANSHAN XINGDA METALLURGICAL NEW MATERIAL
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