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Protection slag used for high-carbon high-alloy wear-resistant steel, and preparation method for protection slag

A technology of mold slag and wear-resistant steel, which is applied in the field of steelmaking and can solve problems such as longitudinal cracks

Inactive Publication Date: 2020-07-24
WUHU XINXING DUCTILE IRON PIPES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a mold slag for high-carbon and high-alloy wear-resistant steel and its preparation method, which solves the problem that high-carbon and high-alloy wear-resistant steel is prone to longitudinal cracks on the surface of the slab

Method used

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  • Protection slag used for high-carbon high-alloy wear-resistant steel, and preparation method for protection slag
  • Protection slag used for high-carbon high-alloy wear-resistant steel, and preparation method for protection slag
  • Protection slag used for high-carbon high-alloy wear-resistant steel, and preparation method for protection slag

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Experimental program
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Embodiment 1

[0025] Mix the basic slag, co-solvent and melting rate regulator, melt and cool, dry and grind to obtain mold slag, wherein the mass percentage of each component in the mold slag is: CaO 30.3%, SiO 2 32.1%, Al 2 o 3 5.5%, Na 2 O 7.5%, F 7.1%, C 13.1%, the control alkalinity is 0.94.

Embodiment 2

[0027] Mix the basic slag, co-solvent and melting rate regulator, melt and cool, dry and grind to obtain mold slag, wherein the mass percentage of each component in the mold slag is: CaO 29.8%, SiO 2 33.6%, Al 2 o 3 4.7%, Na 2 O 8.6%, F 7.5%, C 10.6%, the control alkalinity is 0.89.

Embodiment 3

[0029] Mix the basic slag, co-solvent and melting rate regulator, melt and cool, dry and grind to obtain mold slag, wherein the mass percentage of each component in the mold slag is: CaO 31.6%, SiO 2 31.2%, Al 2 o 3 4.1%, Na 2 O 6.8%, F 8.2%, C 14.3%, the control alkalinity is 1.01.

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Abstract

The invention relates to the field of steelmaking, and discloses a protection slag used for high-carbon high-alloy wear-resistant steel, and a preparation method for the protection slag. The protection slag comprises basic material slags, a co-solvent and a melting speed regulation agent, wherein the basic material slags comprise the following ingredients: 27.6-33.6 wt% of CaO and 29.2-35.2 wt% ofSiO2; the co-solvent comprises the following ingredients: 3.8-6.6 wt% of Al2O3, 3.8-9.0 wt% of F and 6.6-9.2 wt% of Na2O; and the melting speed regulation agent comprises the following ingredient: 11.7-14.3 wt% of C. According to the protection slag disclosed by the invention, the problem that the high-carbon high-alloy wear-resistant steel is likely to generate longitudinal cracks on the surfaceof a casting blank is solved.

Description

technical field [0001] The invention relates to the field of steelmaking, in particular to a mold slag for high-carbon and high-alloy wear-resistant steel and a preparation method thereof. Background technique [0002] Due to its high surface hardness, good toughness and excellent wear resistance, wear-resistant steel is widely used in the field of mining. In addition to high carbon content, this steel type also needs to add high alloy elements (Si, Mn, Cr) to meet the wear resistance requirements of this steel type. Due to the high-carbon and high-alloy steel characteristics of this steel type, its solidification shrinkage rate is large, and the strength of the solidified billet shell is poor. When steel mills solve the problem of longitudinal cracks on the surface of this steel type, they mainly achieve it by optimizing the process and regulating the physical and chemical indicators of mold slag. Mold slag is mainly regulated from two aspects of lubrication and heat tran...

Claims

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Application Information

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IPC IPC(8): C21C7/076
CPCC21C7/076Y02P10/20
Inventor 赵立左小坦陶群南王东兴杨伟勇黄雁
Owner WUHU XINXING DUCTILE IRON PIPES