CN102876976A - Method for preparing high-strength iron alloy - Google Patents

Abstract

The invention relates to a method for preparing high-strength iron alloy. The method comprises the following steps of: preparing the following raw materials in percentage by weight: 1 to 1.4 percent of carbon, 6 to 7 percent of manganese, 4 to 5 percent of copper, 1.5 to 2.0 percent of titanium, 0.5 to 1.2 percent of silicon and the balance of ferrum and inevitable impurities into a smelting furnace, heating until the mixture is in the liquid state, and stirring for mixing; introducing nitrogen from the bottom of the smelting furnace in the smelting state; and performing cold rolling.

Description

A kind of high-strength iron alloy preparation method

Technical field

The present invention relates to a kind of ferroalloy materials, particularly relate to a kind of high-intensity iron alloy preparation method that has.

Background technology

At present, the iron alloy kind in the Application Areas take performance that iron alloy was had as main, seldom has iron alloy to have good over-all properties basically.And good over-all properties is not only the demand of industrial circle, also can enlarge the Application Areas of ferroalloy materials.

Summary of the invention

Technical problem to be solved by this invention is to improve proportioning and the making method of existing iron alloy, provides a kind of erosion resistance, high strength, sludge proof ferroalloy materials.

The present invention is achieved by the following technical solutions:

A kind of high-strength iron alloy preparation method, its step comprises:

1), form preparation raw material by following weight percent, the carbon of 1-1.4%, the manganese of 6-7%, the copper of 4-5%, the titanium of 1.5-2.0%, the silicon of 0.5-1.2%, all the other are iron and inevitable impurity, wherein the weight ratio of manganese and titanium is 4: 1;

2), by step 1) above-mentioned batching is put into smelting furnace be heated to liquid state and mix, under the melting state, pass into nitrogen 15-20 minute of 0.5-2.0MPa from the smelting furnace bottom, then cold rolling.

Described nitrogen pressure is preferably 1.0MPa.

The invention has the beneficial effects as follows:

1), iron alloy of the present invention compares with existing similar iron alloy, has high strength.

2), iron alloy of the present invention soaks for a long time in the acidic solution of PH4-5 and does not weather.

3), iron alloy of the present invention does not have corrosion and oxidative phenomena in wet environment.

Embodiment

Below describe technical scheme of the present invention in detail by specific embodiment.

Embodiment 1

A kind of high-strength iron alloy preparation method, its step comprises:

1), form preparation raw material by following weight percent, 1% carbon, 6% manganese, 4% copper, 1.5% titanium, 0.5% silicon, all the other are iron and inevitable impurity;

2), by step 1) above-mentioned batching is put into smelting furnace be heated to liquid state and mix, under the melting state, pass into the nitrogen 20 minutes of 0.5MPa from the smelting furnace bottom, then cold rolling.

Product is tested, and obtaining product strength is 0.215MPa, puts into pH value and be 4.5 acidic solution 1 hour, observes surface-brightening by sight; Did SaltSprayTest 60 hours, the surface is without corrosion.

Embodiment 2

A kind of high-strength iron alloy preparation method, its step comprises:

1), form preparation raw material by following weight percent, 1.4% carbon, 7% manganese, 5% copper, 1.75% titanium, 1.2% silicon, all the other are iron and inevitable impurity;

2), by step 1) above-mentioned batching is put into smelting furnace be heated to liquid state and mix, under the melting state, pass into the nitrogen 15 minutes of 2.0MPa from the smelting furnace bottom, then cold rolling.

Product is tested, and obtaining product strength is 0.21MPa, puts into pH value and be 4.5 acidic solution 1 hour, observes surface-brightening by sight; Did SaltSprayTest 60 hours, the surface is without corrosion.

Embodiment 3

A kind of high-strength iron alloy preparation method, its step comprises:

1), form preparation raw material by following weight percent, 1.3% carbon, 6.8% manganese, 4.2% copper, 1.7% titanium, 0.8% silicon, all the other are iron and inevitable impurity;

2), by step 1) above-mentioned batching is put into smelting furnace be heated to liquid state and mix, under the melting state, pass into the nitrogen 18 minutes of 1.0MPa from the smelting furnace bottom, then cold rolling.

Product is tested, and obtaining product strength is 0.23MPa, puts into pH value and be 4.5 acidic solution 1 hour, observes surface-brightening by sight; Did SaltSprayTest 60 hours, the surface is without corrosion.

Claims (2)

1. high-strength iron alloy preparation method, it is characterized in that: its step comprises:

1), form preparation raw material by following weight percent, the carbon of 1-1.4%, the manganese of 6-7%, the copper of 4-5%, the titanium of 1.5-2.0%, the silicon of 0.5-1.2%, all the other are iron and inevitable impurity, wherein the weight ratio of manganese and titanium is 4: 1;

2), by step 1) above-mentioned batching is put into smelting furnace be heated to liquid state and mix, under the melting state, pass into nitrogen 15-20 minute of 0.5-2.0MPa from the smelting furnace bottom, then cold rolling.

2. described high-strength iron alloy preparation method according to claim 1, it is characterized in that: described nitrogen pressure is preferably 1.0MPa.