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Special mold powder for continuous casting of titanium-containing high-strength welding wire steel and its manufacturing method

A technology of mold powder and a manufacturing method, applied in the field of iron and steel smelting, can solve problems such as the influence of operator's health on the service life of equipment, poor SiO2 reaction effect, etc. Effect

Inactive Publication Date: 2021-08-24
NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The mold flux SiO 2 Higher content, even with increased TiO 2 Suppression of Ti in steel and SiO in slag 2 The reaction effect is not good, and the F in the slag system - The content is high, which has a certain impact on the health of operators and the service life of equipment

Method used

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  • Special mold powder for continuous casting of titanium-containing high-strength welding wire steel and its manufacturing method
  • Special mold powder for continuous casting of titanium-containing high-strength welding wire steel and its manufacturing method

Examples

Experimental program
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Effect test

Embodiment 1

[0032] This embodiment provides a special mold flux for continuous casting of titanium-containing high-strength welding wire steel, which consists of the following components in terms of mass percentage:

[0033] CaO 28%, Al 2 o 3 28%, Na 2 O 6%, MgO 1%, F - 10%, B 2 o 3 10%, SiO 2 1%, TiO 2 10%, Fe 2 o 3 2%, carbon material 4%, the mass ratio of graphite and carbon black in the carbon material is 2:1.

[0034] This embodiment also provides a method for manufacturing the above mold flux for continuous casting of titanium-containing high-strength welding wire steel, including the following steps:

[0035] (1) Raw material preparation: weigh CaO and Al according to the above mass percentage 2 o 3 、Na 2 CO 3 , MgO, F - , B 2 o 3 , SiO 2 、TiO 2 and Fe 2 o 3 and carbon materials; where Na 2 CO 3 To generate Na after melting 2 O raw material, Na 2 CO 3 The mass according to Na 2 The mass conversion of O is obtained;

[0036] (2) Melting: uniformly mix ...

Embodiment 2

[0041] This embodiment provides a special mold powder for continuous casting of titanium-containing high-strength welding wire steel, which consists of the following components in mass percentage:

[0042] CaO 30%, Al 2 o 3 30%, Na 2 O 7%, MgO 2%, F - 8%, B 2 o 3 8%, SiO 2 2%, TiO 2 6%, Fe 2 o 3 1%, carbon material 6%, the mass ratio of graphite and carbon black in carbon material is 2:1.

[0043] The preparation method of this example is the same as that of Example 1, except that the heating temperature in step (2) of this example is 1350°C, and the heat preservation is 40min, and the water temperature of water quenching in step (3) is 5°C.

Embodiment 3

[0045] This embodiment provides a special mold powder for continuous casting of titanium-containing high-strength welding wire steel, which consists of the following components in mass percentage:

[0046] CaO 29%, Al 2 o 3 29%, Na 2 O 9%, MgO 3%, F - 6%, B 2 o 3 6%, SiO 2 4%, TiO 2 4%, Fe 2 o 3 2%, carbon material 8%, the mass ratio of graphite and carbon black in carbon material is 3:2.

[0047] The preparation method of this example is the same as that of Example 1, except that the heating temperature in step (2) of this example is 1450° C., and the water temperature for water quenching in step (3) is 15° C.

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Abstract

The invention provides mold powder for continuous casting of titanium-containing high-strength welding wire steel, which consists of the following components in terms of mass percentage: CaO 28-32%, Al 2 o 3 28~32%, Na 2 O 6~10%, MgO 1~5%, F ‑ 4~10%, B 2 o 3 4~10%, SiO 2 1~4%, TiO 2 2~8%, Fe 2 o 3 ≤2%, carbon material 4~10%, including CaO and Al 2 o 3 The mass ratio is 1:1. The invention also provides a method for manufacturing the mold flux. The present invention by adding B 2 o 3 、Na 2 O and F ‑ Remarkably reduce the melting point and viscosity of the mold flux, which is beneficial to the consumption, lubrication and adsorption of the mold flux; the manufacturing method of the present invention is simple to operate, and the conditions are mild, and the obtained mold flux enables the titanium-containing high-strength welding wire steel to achieve continuous casting and continuous casting, obtaining A billet with good surface quality has high practical significance.

Description

technical field [0001] The invention relates to the technical field of iron and steel smelting, in particular to mold mold powder specially used for continuous casting of titanium-containing high-strength welding wire steel and a manufacturing method thereof. Background technique [0002] As an important functional material in the continuous casting process, mold slag plays an important role in heat insulation and heat preservation in the continuous casting mold, preventing secondary oxidation of molten steel, absorbing non-metallic inclusions, lubricating the billet shell and controlling heat transfer. The performance of the mold flux directly determines the quality of the slab, thereby affecting the production efficiency. [0003] The titanium element in the titanium-containing high-strength welding wire steel can combine with nitrogen to form TiN, which plays a role in nitrogen fixation, and at the same time improves the ability of the weld metal to resist nitrogen pores,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D11/111
CPCB22D11/111
Inventor 朱立光朴占龙王杏娟刘增勋王硕明张彩军陈伟张庆军孙立根韩毅华
Owner NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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