CN104294006A

CN104294006A - Deoxidizing agent for steelmaking

Info

Publication number: CN104294006A
Application number: CN201410579387.0A
Authority: CN
Inventors: 周欢
Original assignee: Individual
Current assignee: Individual
Priority date: 2014-10-24
Filing date: 2014-10-24
Publication date: 2015-01-21

Abstract

The invention relates to a deoxidizing agent for steelmaking, and the deoxidizing agent comprises the following components in percentage by weight: 25-35% of magnesium, 35-45% of aluminum, 0.3-0.5% of barium, 0.1-0.3% of sodium, and the balance of iron. By virtue of a powder metallurgy technology, a problem that the solubility of magnesium relative to iron is low is solved, the casting loss of magnesium is reduced, the magnesium content of an alloy is increased, the addition amount of the deoxidizing agent is reduced, and the cost of production is lowered.

Description

A kind of deoxidant for steelmaking

Technical field

The invention belongs to metal material field, refer to a kind of deoxidant for steelmaking especially.

Background technology

In present steelmaking process, generally use fine aluminium reductor, this utilizes fine aluminium and affinity for oxygen is strong, deoxidation effectiveness is high and be used widely, but fine aluminium deoxidation also has some defects, be exactly that the fusing point of aluminium is low, density is little, float in molten steel, and the aluminium sesquioxide poor plasticity that produces of deoxidation and fusing point is high, be present in the thermal creep fragility that can cause steel in steel, reduce the hot strength of steel.

Also use magnesium to make reductor in existing reductor, because the character of magnesium is active, being more conducive to the combination of oxygen, be optimal reductor, but the density of magnesium is little, and the boiling point of magnesium is low, solubleness is low, is difficult to be dissolved in molten steel.

Existing technology has used and have been coordinated by aluminium and magnesium and to make Al-Mg-Fe alloy as reductor, but adopt common method for refining, because magnesium is relative to the low solubility of iron, therefore cause the scaling loss of magnesium too much when refining, the yield of obtained magnalium is low and cause cost high.

Summary of the invention

The object of this invention is to provide a kind of deoxidant for steelmaking, by the technical program, the problem that magnesium loss is large, cost is high that existing technology produces steel making deoxidant can be overcome.

A kind of deoxidant for steelmaking, its composition is by weight percentage, the magnesium of 25-35%, the aluminium of 35-45%, the barium of 0.3-0.5%, the sodium of 0.1-0.3%, and She's amount is iron.

The present invention's beneficial effect is compared with the existing technology:

By powder metallurgy technology, overcome the problem that magnesium is low relative to iron solubility, and decrease magnesium water damage amount, improve the content of magnesium in alloy, reduce the addition of reductor, reduce production cost.

Embodiment

Describe technical scheme of the present invention in detail by the following examples, should be understood that, following embodiment only can be used for explaining the present invention and can not being interpreted as being limitation of the present invention.

A kind of deoxidant for steelmaking, its composition is that the magnesium of 25-35%, the aluminium of 35-45%, the barium of 0.3-0.5%, the sodium of 0.1-0.3%, surplus is iron by weight percentage.

Described preparation method is:

Batching, is, the magnesium of 25-35%, the aluminium of 35-45%, the barium of 0.3-0.5%, the sodium of 0.1-0.3% by weight percentage, and surplus is that iron carries out calculating batching;

Batch mixing, by above-mentioned each component not by grinding mechanical powdered, the median size of each powder is 20-60 micron; Above-mentioned powder is carried out batch mixing 30-60 minute in mixer;

Compacting, becomes base substrate by 350-500MPa pressure compacting 10-60 second in mould;

Fire, sinter 1-3 hour to be 500-3000Pa furnace temperature be 650-700 DEG C in maintenance vacuum condition or vacuum nitrogen atmosphere in stove by obtained base substrate, then with the speed of cooling of 15-25 DEG C/min, be cooled to room temperature and obtain alloy.

By at the uniform velocity lowering the temperature, making the uniform texture of reductor, being conducive to the service efficiency improving reductor.

In following examples of the application, the preparation method of deoxidant for steelmaking is identical, the different compositions being only steel making deoxidant, therefore, below in an example, only propose the composition of steel making deoxidant, repeat specification is not carried out to the preparation method of steel making deoxidant.

Embodiment 1

A kind of deoxidant for steelmaking, its composition is that the magnesium of 25%, the aluminium of 35%, the barium of 0.3%, the sodium of 0.1%, surplus is iron by weight percentage.

Embodiment 2

A kind of deoxidant for steelmaking, its composition is by weight percentage, the magnesium of 35%, the aluminium of 45%, the barium of 0.5%, the sodium of 0.3%, and She's amount is iron.

Embodiment 3

A kind of deoxidant for steelmaking, its composition is that the magnesium of 30%, the aluminium of 38%, the barium of 0.35%, the sodium of 0.18%, surplus is iron by weight percentage.

Claims

1. a deoxidant for steelmaking, is characterized in that: its composition is that the magnesium of 25-35%, the aluminium of 35-45%, the barium of 0.3-0.5%, the sodium of 0.1-0.3%, surplus is iron by weight percentage.