CN103589903A - High-strength and wear-resistant copper alloy and preparation method thereof - Google Patents

Abstract

The invention relates to a high-strength and wear-resistant copper alloy material. The high-strength and wear-resistant copper alloy material is characterized by containing the following chemical ingredients in percentage by mass: 63.0-66.0% of Cu, 0.6-1.2% of Al, lower than 0.7% of Ni, 1.6-2.4% of Mn, lower than 0.5% of Fe, 0.8-1.3% of Si, lower than 0.1% of Pb and the balance of Zn. The high-strength and wear-resistant copper alloy disclosed by the invention has good comprehensive mechanical properties.

Description

A kind of high-strength wear-resistant copper alloy and manufacture method thereof

Technical field

The present invention relates to a kind of alloy and preparing technical field thereof, specifically a kind of high-strength wear-resistant copper alloy and manufacture method thereof.

Background technology

Polynary Complicated Copper alloy material has excellent over-all properties, is widely used in machinery, automobile and other industries.Along with these industries are to the improving constantly of material performance requirement, develop and there is good comprehensive mechanical performance, as higher tensile strength, yield strength, good plasticity, reliable hardness, the material that especially at high temperature possesses better performance becomes the task of top priority.The Cu alloy material comprehensive mechanical performance that is widely used at present machinery, automobile and other industries needs further to be improved.

Summary of the invention

The object of the present invention is to provide a kind of brass material of good combination property.In copper zinc alloy, add specifically appropriate aluminium, nickel, iron, manganese and silicon, and carry out optimum combination, propose rational content and manufacturing process.

A kind of high-strength wear-resistant copper alloy material of the present invention, comprises the chemical composition of following quality percentage: Cu 63.0 ~ 66.0%; Al 0.7 ~ 1.2%; Ni < 0.7%; Mn 1.6 ~ 2.4%; Fe < 0.5%; Si 0.7 ~ 1.2%; Pb < 0.1%; Surplus is Zn; Other < 0.3%.

The reasons are as follows of the active chemical design considerations of high-strength wear-resistant copper alloy of the present invention and restriction content range:

Al: can form firm oxide film at alloy surface, improve the erosion resistance of alloy to gas, liquid, and improve intensity, the hardness of brass;

Mn: can improve erosion resistance, thermostability and intensity after adding manganese;

Si: can carry heavy alloyed intensity, hardness, casting fluidity;

Ni: the obdurability that improves material.

Of the present invention a kind of high-strength wear-resistant copper alloy material is done manufacture method, uses the manufacture of 1.5T middle frequency furnace, and processing step is:

1. first at furnace bottom, add 200kg left and right FM6804 brass borings material, add again electrolytic copper copper coin 100 ~ 110kg, aluminium ingot 34 ~ 40kg, Cu-Mn master alloy (manganese content 35%, residue is for copper content), Al-Fe master alloy (iron-holder 35%, residue is for aluminum content), Ni2.2 ~ 2.4kg, Si3.4 ~ 3.6kg, fusing heats up, P-Cu master alloy (the phosphorus content 10 ~ 12% that simultaneously adds 0.7 ~ 0.8kg, residue is for copper content) carry out deoxidation, adding charcoal covers, temperature of fusion rises to more than 1100 ℃, shorten smelting time as far as possible, reduce alloy air-breathing;

2., after electrolytic copper copper coin melts completely in stove, add remaining 700kg left and right FM6804 brass borings material in batches, after guaranteeing to melt completely, insulation 5-10 minute; After insulation finishes, add remaining electrolytic copper copper coin 130 ~ 140kg cooling, then add remaining 0.7 ~ 0.8kg P-Cu master alloy and the rear boiling 2-3 minute that heats up of 83 ~ 88kg zinc ingot metal fusing, add sodium aluminum fluoride, slagging-off;

3. temperature is adjusted to after 1090 ℃～1130 ℃, carries out vertical semi-continuous casting;

4. after ingot casting being cut to certain length, use 1650T or 2500T extrusion machine to be expressed to required size of pipe and tubing.

5. according to product size, design cold-rolling process again, and carry out stress relief annealing, meet material performance requirement.

The advantage of a kind of high-strength wear-resistant copper alloy of the present invention and manufacture method thereof is:

1. by the chemical Composition Control of FM6804 brass material being guaranteed to as-cast structure is alpha+beta+strengthening phase, possesses good intensity and hardness, possesses good hot plastic deformation ability simultaneously, by controlling melting technology, reduce being mingled with of ingot casting, can improve erosion resistance, thermostability and intensity after adding manganese; Add silicon can carry heavy alloyed intensity, hardness, casting fluidity, while manganese and silicon form manganese silicon series intermetallic compound and as the strengthening phase in copper matrix, have occurred improving the wear resisting property of material in copper matrix; Add nickel to improve the obdurability of material;

2. by using extrusion process to change the as-cast structure of FM6804 brass material, can be become from 0 ~ 2 grade (coarse grain) of as cast condition 4 ~ 5 grades (compared with small grains) of As-extruded, thereby its as cast condition crystal grain is carried out to fragmentation, obtain small grains and improve its tensile strength, hardness and unit elongation;

3. by using cold-rolling process to make the viscous deformation of FM6804 brass material tubing generation cold conditions, the intensity of this material, hardness are further enhanced, and size of pipe and tubing is more accurate, reduces follow-up precision work process redundancy;

4. by annealing process, make the unrelieved stress after FM6804 brass material pipe plastic deformation, avoid tubing cracking and produce stress corrosion.

Embodiment

Embodiment mono-

Of the present invention a kind of high-strength wear-resistant copper alloy material is done manufacture method, uses the manufacture of 1.5T middle frequency furnace, and processing step is:

A Complicated Copper alloy material, its weight percentages of components is as follows:

Cu 63%

Al 1.2%

Mn 2.4%

Si 1%

Fe 0.4%

Ni 0.6%

Zn 31.4%

1. first at furnace bottom, add 200kgFM6804 brass borings material, add again electrolytic copper copper coin 110kg, aluminium ingot 0.7kg, Cu-Mn master alloy 21.6kg(manganese content 35%, residue is for copper content), Al-Fe master alloy 4kg(iron-holder 35%, residue is for aluminum content), Ni1.8kg, Si4.5kg, fusing heats up, P-Cu master alloy (the phosphorus content 10 ~ 12% that simultaneously adds 0.7 ~ 0.8kg, residue is for copper content) carry out deoxidation, adding charcoal covers, temperature of fusion rises to more than 1100 ℃, shorten smelting time as far as possible, reduce alloy air-breathing;

2. check that in stove, material removes the gred after fusing completely, add 0.4 ~ 0.5 kg P-Cu alloy (phosphor copper) to carry out deoxidation, the FM6804 brass borings material that added 200 ~ 250kg every 20 ~ 30 minutes, after guaranteeing to melt completely, insulation 5-10 minute, after insulation finishes, add remaining electrolytic copper copper coin 105kg cooling, add again the rear boiling 2-3 minute that heats up of remaining 0.7 ~ 0.8kg P-Cu master alloy and the fusing of 80kg zinc ingot metal, add sodium aluminum fluoride, slagging-off;

3. temperature is adjusted to after 1090 ℃～1130 ℃, carries out vertical semi-continuous casting;

4. after ingot casting being cut to certain length, use 1650T or 2500T extrusion machine to be expressed to required size of pipe and tubing.

5. according to product size, design cold-rolling process again, and carry out stress relief annealing, meet material performance requirement.

Embodiment bis-

Of the present invention a kind of high-strength wear-resistant copper alloy material is done manufacture method, uses the manufacture of 1.5T middle frequency furnace, and processing step is:

A Complicated Copper alloy material, its weight percentages of components is as follows:

Cu 64%

Al 1.0%

Mn 2.0%

Si 1.2%

Fe 0.3%

Ni 0.5%

Zn 31.0%

1. first at furnace bottom, add 200kgFM6804 brass borings material, add again electrolytic copper copper coin 122kg, Cu-Mn master alloy 8kg(manganese content 35%, residue is for copper content), Ni0.6kg, Si7kg, heat up and melt, add the P-Cu master alloy (phosphorus content 10 ~ 12% remains as copper content) of 0.7 ~ 0.8kg to carry out deoxidation simultaneously, adding charcoal covers, temperature of fusion rises to more than 1100 ℃, shortens smelting time as far as possible, reduces alloy air-breathing;

2. check that in stove, material removes the gred after fusing completely, add 0.4 ~ 0.5 kg P-Cu alloy (phosphor copper) to carry out deoxidation, the FM6804 brass borings material that added 200 ~ 250kg every 20 ~ 30 minutes, after guaranteeing to melt completely, insulation 5-10 minute, after insulation finishes, add remaining electrolytic copper copper coin 115kg cooling, add again the rear boiling 2-3 minute that heats up of remaining 0.7 ~ 0.8kg P-Cu master alloy and the fusing of 80kg zinc ingot metal, add sodium aluminum fluoride, slagging-off;

3. temperature is adjusted to after 1090 ℃～1130 ℃, carries out vertical semi-continuous casting;

4. after ingot casting being cut to certain length, use 1650T or 2500T extrusion machine to be expressed to required size of pipe and tubing.

5. according to product size, design cold-rolling process again, and carry out stress relief annealing, meet material performance requirement.

Embodiment tri-

Of the present invention a kind of high-strength wear-resistant copper alloy material is done manufacture method, uses the manufacture of 1.5T middle frequency furnace, and processing step is:

A Complicated Copper alloy material, its weight percentages of components is as follows:

Cu 66.0%

Al 1.1%

Mn 1.8%

Si 0.9%

Fe 0.3%

Ni 0.4%

Zn 29.5%

1. first at furnace bottom, add 200kgFM6804 brass borings material, add again electrolytic copper copper coin 122kg, Ni1.8kg, Si3.4kg, fusing heats up, P-Cu master alloy (the phosphorus content 10 ~ 12% that simultaneously adds 0.7 ~ 0.8kg, residue is copper content) carry out deoxidation, add charcoal and cover, temperature of fusion rises to more than 1100 ℃, shorten smelting time as far as possible, reduce alloy air-breathing;

2. check that in stove, material removes the gred after fusing completely, add 0.4 ~ 0.5 kg P-Cu alloy (phosphor copper) to carry out deoxidation, the FM6804 brass borings material that added 200 ~ 250kg every 20 ~ 30 minutes, after guaranteeing to melt completely, insulation 5-10 minute, after insulation finishes, add remaining electrolytic copper copper coin 127kg cooling, add again the rear boiling 2-3 minute that heats up of remaining 0.7 ~ 0.8kg P-Cu master alloy and the fusing of 80kg zinc ingot metal, add sodium aluminum fluoride, slagging-off;

3. temperature is adjusted to after 1090 ℃～1130 ℃, carries out vertical semi-continuous casting;

4. after ingot casting being cut to certain length, use 1650T or 2500T extrusion machine to be expressed to required size of pipe and tubing.

5. according to product size, design cold-rolling process again, and carry out stress relief annealing, meet material performance requirement.

Chemical composition analysis is carried out in sampling, and chemical composition and hardness result are in Table 1.

Table 1

Material of the present invention carries out mechanical property test, and test-results is in Table 2.

Table 2

Material of the present invention has good mechanical property, can be widely used on the high-end product of automobile industry.

Claims (2)

1. a high-strength wear-resistant copper alloy material, is characterized in that comprising the chemical composition of following quality percentage: Cu 63.0 ~ 66.0%; Al 0.6 ~ 1.2%; Ni < 0.7%; Mn 1.6 ~ 2.4%; Fe < 0.5%; Si 0.8 ~ 1.3%; All the other are Zn.

2. a production method for high-strength wear-resistant copper alloy material, is characterized in that its technological process of production is:

1. first at furnace bottom, add furnace entering volume 200kg left and right FM6804 brass borings material, add again electrolytic copper copper coin 100 ~ 110kg, aluminium ingot 34 ~ 40kg, Cu-Mn master alloy (manganese content 35%, residue is for copper content), Al-Fe master alloy (iron-holder 35%, residue is for aluminum content), Ni2.2 ~ 2.4kg, Si3.4 ~ 3.6kg, fusing heats up, P-Cu master alloy (the phosphorus content 10 ~ 12% that simultaneously adds 0.7 ~ 0.8kg, residue is for copper content) carry out deoxidation, adding charcoal covers, temperature of fusion rises to more than 1100 ℃, shorten smelting time as far as possible, reduce alloy air-breathing;

2., after electrolytic copper copper coin melts completely in stove, add remaining 700kg left and right FM6804 brass borings material in batches, after guaranteeing to melt completely, insulation 5-10 minute; After insulation finishes, add remaining electrolytic copper copper coin 130 ~ 140kg cooling, then add remaining 0.7 ~ 0.8kg P-Cu master alloy and the rear boiling 2-3 minute that heats up of 83 ~ 88kg zinc ingot metal fusing, add sodium aluminum fluoride, slagging-off;

3. temperature is adjusted to after 1090 ℃～1130 ℃, carries out vertical semi-continuous casting;

4. after ingot casting being cut to certain length, use 1650T or 2500T extrusion machine to be expressed to required size of pipe and tubing;

5. according to product size, design cold-rolling process again, and carry out stress relief annealing, meet material performance requirement.