CN102876974A - Preparing method of corrosion-resistant ferrous alloy - Google Patents

Abstract

The invention relates to a preparing method of corrosion-resistant ferrous alloy. The preparing method comprises the steps of preparing the following raw materials by weight: 1 to 1.4 percent of carbon, 6 to 7 percent of manganese, 4 to 5 percent of copper, 1.5 to 2.5 percent of titanium, 0.5 to 1.2 percent of silicon, and ferrum and inevitable impurities in balancing amount; placing the raw materials in a melting furnace to be heated into liquid; stirring for mixing; introducing nitrogen from the bottom of the melting furnace in the state of melting; and carrying out cold-rolling.

Description

Corrosion-resistant iron alloy preparation method

Technical field

The present invention relates to a kind of ferroalloy materials, particularly relate to a kind of iron alloy preparation method with erosion resistance.

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:

Corrosion-resistant ferroalloy materials 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 1.5-2.5%, the silicon of 0.5-1.2%, all the other are iron and inevitable impurity, wherein the weight ratio of manganese and titanium is 3: 1-5: 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 0.5-1.2MPa from smelting furnace bottom, at first adopted during described inflated with nitrogen lower pressure 0.5MPa3-5 minute, adjusting pressure kept 5-10 minute to 0.8-1.0MPa, nitrogen pressure is adjusted to 1.2-1.5MPa3-5 minute at last, then cold rolling.

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 does not weather in the medium-term and long-term immersion of the acidic solution of PH4-5.

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

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 nitrogen 15-20 minute of 0.5-1.2MPa from smelting furnace bottom, at first adopted during described inflated with nitrogen lower pressure 0.5MPa3-5 minute, adjusting pressure kept 5-10 minute to 0.8-1.0MPa, nitrogen pressure is adjusted to 1.2-1.5MPa3-5 minute at last, 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

1), form preparation raw material by following weight percent, 1.4% carbon, 7% manganese, 5% copper, 2.5% 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 nitrogen 15-20 minute of 0.5-1.2MPa from smelting furnace bottom, at first adopted during described inflated with nitrogen lower pressure 0.5MPa3-5 minute, adjusting pressure kept 5-10 minute to 0.8-1.0MPa, nitrogen pressure is adjusted to 1.2-1.5MPa3-5 minute at last, 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

1), form preparation raw material by following weight percent, 1.3% carbon, 6.8% manganese, 4.2% copper, 2.1% 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 nitrogen 15-20 minute of 0.5-1.2MPa from smelting furnace bottom, at first adopted during described inflated with nitrogen lower pressure 0.5MPa3-5 minute, adjusting pressure kept 5-10 minute to 0.8-1.0MPa, nitrogen pressure is adjusted to 1.2-1.5MPa3-5 minute at last, 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 (1)

1. erosion resistance 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 1.5-2.5%, the silicon of 0.5-1.2%, all the other are iron and inevitable impurity, wherein the weight ratio of manganese and titanium is 3: 1-5: 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 0.5-1.2MPa from smelting furnace bottom, at first adopted during described inflated with nitrogen lower pressure 0.5MPa3-5 minute, adjusting pressure kept 5-10 minute to 0.8-1.0MPa, nitrogen pressure is adjusted to 1.2-1.5MPa3-5 minute at last, then cold rolling.