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Stainless steel refining agent and preparation method thereof

A refining agent, stainless steel technology, applied in the field of stainless steel smelting, can solve the problems of stainless steel magnetism or magnetic increase, small inclusions difficult to remove, affect the quality of molten steel, etc., to reduce the gas content, reduce or eliminate free carbides, refining good effect

Inactive Publication Date: 2016-08-17
新昌县儒岙晨辉不锈钢制品厂
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing stainless steel refining agent is used to smelt stainless steel, which is easy to close or reduce the austenite zone and increase the ferrite content, so that the stainless steel produces magnetism or increases the magnetism.
The existing refining agent components contain aluminum, although aluminum has deoxidation effect, but the formed Al 2 o 3 It is difficult to completely remove the small inclusions in molten steel, which affects the quality of molten steel

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A kind of stainless steel refining agent, comprises according to the raw material of weight part:

[0025] Ce: 3 parts, La: 1 part, Y: 4 parts, Ca: 10 parts, Ba: 4 parts, Mg: 6 parts, Si: 30 parts, Re: 2 parts, V: 3 parts, Mn: 6 parts, Ti: 3 parts, Fe: 12 parts, 3 parts of dolomite, 2 parts of fluorite.

[0026] The preparation method of described stainless steel refining agent, concrete steps are as follows:

[0027] (1) Weigh each raw material according to the weight part, and the raw material is block;

[0028] (2) Put the bulk raw material into the crucible of the intermediate frequency induction furnace to melt, and then use the gas atomization technology to atomize into 80 mesh powder;

[0029] (3) Put the atomized powder in an oven and bake at 100°C for 80 minutes;

[0030] (4) Compress the dried atomized powder into a cylinder, cube or round cake in a hot pressing mold to obtain the finished refining agent.

Embodiment 2

[0032] A kind of stainless steel refining agent, comprises according to the raw material of weight part:

[0033] Ce: 3.5 parts, La: 1.5 parts, Y: 4.5 parts, Ca: 11 parts, Ba: 4.5 parts, Mg: 6.5 parts, Si: 31 parts, Re: 2.5 parts, V: 3.5 parts, Mn: 7 parts, Ti: 3.5 parts, Fe: 13 parts, dolomite 3.5 parts, fluorite 2.5 parts.

[0034] The preparation method of described stainless steel refining agent, concrete steps are as follows:

[0035] (1) Weigh each raw material according to the weight part, and the raw material is block;

[0036] (2) Put the bulk raw material into the crucible of an intermediate frequency induction furnace to melt, and then use gas atomization technology to atomize it into a 90-mesh powder;

[0037] (3) Put the atomized powder in an oven and bake at 110°C for 85 minutes;

[0038] (4) Compress the dried atomized powder into a cylinder, cube or round cake in a hot pressing mold to obtain the finished refining agent.

Embodiment 3

[0040] A kind of stainless steel refining agent, comprises according to the raw material of weight part:

[0041] Ce: 4 parts, La: 2 parts, Y: 5 parts, Ca: 12 parts, Ba: 5 parts, Mg: 7 parts, Si: 32 parts, Re: 3 parts, V: 4 parts, Mn: 8 parts, Ti: 4 parts, Fe: 14 parts, dolomite 4 parts, fluorite 3 parts.

[0042] The preparation method of described stainless steel refining agent, concrete steps are as follows:

[0043] (1) Weigh each raw material according to the weight part, and the raw material is block;

[0044] (2) Put the bulk raw material into the crucible of an intermediate frequency induction furnace to melt, and then use gas atomization technology to atomize it into a 100-mesh powder;

[0045] (3) Put the atomized powder in an oven and bake at 120°C for 90 minutes;

[0046] (4) Compress the dried atomized powder into a cylinder, cube or round cake in a hot pressing mold to obtain the finished refining agent.

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PUM

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Abstract

The invention discloses a stainless steel refining agent and a preparation method thereof. The stainless steel refining agent comprises raw materials in parts by weight: Ce: 3-5 parts, La: 1-3 parts, Y: 4-6 parts, Ca: 10 parts ‑14 parts, Ba: 4‑6 parts, Mg: 6‑8 parts, Si: 30‑34 parts, Re: 2‑4 parts, V: 3‑5 parts, Mn: 6‑10 parts, Ti: 3‑3 parts 5 parts, Fe: 12‑16 parts, dolomite 3‑5 parts, fluorite 2‑4 parts. The invention adopts the method of atomization powder making and hot pressing to replace the existing physical mixing method, so that the refining agent has uniform components, is convenient to use, and has better refining effect. Body, reduce or eliminate free carbide, deoxidation and degassing, remove inclusions or change the shape of inclusions and other functions, can protect the furnace lining, the furnace lining has a long service life, can greatly reduce the subcutaneous black spots of the workpiece, and the surface of the polished piece is black. Points and pockmarks, improve the yield of products, can greatly reduce the inclusions of molten steel, and greatly reduce the gas content.

Description

technical field [0001] The invention relates to the technical field of stainless steel smelting, in particular to a stainless steel refining agent and a preparation method thereof. Background technique [0002] As an important steel material, stainless steel is increasingly widely used in the national economy. How to further improve the product quality and production efficiency of stainless steel has become a concern of the steel industry. [0003] Adding refining agent in the smelting process of stainless steel can simplify the production process and greatly reduce the production cost. Chinese invention patent application 99120040.3 discloses a "stainless steel refining agent and its method for smelting stainless steel" (public date November 10, 1999). Among them, the stainless steel refining agent, its composition by weight percentage is Re2.0-20.0%, Ca2.0-16.0%, Al0.5-6.0%, Ba3.0-18.0%, Mg0.5-9.5%, V3.0- 30.0%, the rest is Si. When it is used for smelting stainless st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C7/04
CPCC21C7/04C21C7/0006
Inventor 盛健平
Owner 新昌县儒岙晨辉不锈钢制品厂
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