CN103589904B - A kind of high-strength wear-resistant copper alloy and pipe-making method thereof - Google Patents

Abstract

The present invention relates to a kind of high-strength wear-resistant copper alloy material. It is characterized in that comprising the chemical composition of following percent mass: Cu57.0��60.0; Al1.5��2.0; Mn2.0��4.0; Fe��0.25; Si0.6��0.9; Pb0.3��0.6; All the other are Zn. The high-strength wear-resistant copper alloy of the present invention has good comprehensive mechanical performance.

Description

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

Technical field

The present invention relates to a kind of alloy and manufacture method thereof, espespecially a kind of high-strength wear-resistant copper alloy and pipe-making method thereof.

Background technology

The complicated Cu alloy material of many units has excellent over-all properties, extensively for machinery, automobile and other industries. Along with these industry improving constantly material performance requirement, developing and have good comprehensive mechanical performance, such as higher tensile strength, yield strength, good plasticity, reliable hardness, the material especially at high temperature possessing better performance becomes the task of top priority. Extensively need to be improved further for Cu alloy material comprehensive mechanical performance mechanical, automobile and other industries at present.

Summary of the invention

It is an object of the invention to provide a kind of good combination property, the brass material of better performances under high temperature. In copper zinc alloy, add appropriate aluminium, iron, manganese, silicon and lead specifically, and carry out optimum combination, it is proposed to reasonably content and manufacture method.

The object of the present invention is achieved by the following measures: brass material comprises the chemical composition of following percent mass: Cu57.0��60.0%; Al1.5��2.0%; Mn2.0��4.0%; Fe��0.25%; Si0.6��0.9%; Pb0.3��0.6%; Surplus is Zn; Other��0.4%.

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

Al: firm oxide film can be formed at alloy surface, it is to increase alloy is to the erosion resistance of gas, liquid, and improves intensity, the hardness of brass;

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

Si: the intensity of alloy, hardness, casting fluidity can be improved, add Pb simultaneously and can reduce friction factor.

The present invention is high-strength wear-resistant copper alloy bar manufacture method, carries out melting with 1.5T middle frequency furnace, and processing step is:

1. first add about 200kg FM5908 at furnace bottom and consider material to be worth doing, then the alloys such as the electrolytic copper copper coin of 60��70kg, 3.5��5kg aluminium ingot, 15��30kgCu-Mn master alloy (master alloy manganese content is 35%), Si1.5��2.5kg and simple substance are added the fusing that heats up, add charcoal to cover simultaneously, temperature rises to 1100 DEG C, shorten smelting time as far as possible, reduce molten metal air-breathing;

2. after in stove, Cu melts completely, then FM5908 bits material is continued to add, after guaranteeing fusing completely, then add remaining 70��90kg electrolytic copper copper coin and it is cooled to about 1000 DEG C, then Pb0.7��1.5kg, Zn80��95kg are all added, it is ensured that after Zn melts completely, add sodium aluminum fluoride refining, stir, slagging-off, leave standstill 5��10 minutes;

3., after temperature is adjusted to 1050 DEG C��1120 DEG C, vertical semi-continuous casting is carried out;

4. required bar size it is expressed to after ingot casting being cut to certain length;

5. design drawing process according to product size 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 FM5908 brass material being ensured as-cast structure is alpha+beta+strengthening phase+Pb phase, possesses good intensity and hardness, possesses good hot plastic deformation ability simultaneously, reduce being mingled with of ingot casting by control melting technology, erosion resistance, thermostability and intensity after adding manganese, can be improved; Adding silicon and can improve the intensity of alloy, hardness, casting fluidity, manganese and silicon form manganese silicon series intermetallic compound in Copper substrate and occur, as the strengthening phase in Copper substrate, the wear resisting property that improve material simultaneously; Add the cutting ability that Pb improves material;

2. the as-cast structure of FM5908 brass material is changed with the use of extrusion process, can turn into extruding from the 0��2 of as cast condition grade (coarse grain) 4��5 grades (relatively small grains) of state, its as-cast grain be carried out fragmentation and obtains small grains thus improve its tensile strength, hardness and unit elongation;

3. FM5908 brass material bar generation cold conditions viscous deformation is made with the use of drawing process so that intensity, the hardness of this material are further enhanced, and bar external diameter size is more accurate, reduce follow-up precision work process redundancy;

4. make the unrelieved stress after FM5908 brass bar viscous deformation by annealing process, avoid cracking and produce stress corrosion.

Embodiment

Embodiment one

The complicated Cu alloy material of a kind of high-strength abrasion-proof, its weight percentages of components is as follows:

1. first 200kgFM5908 brass bits material is added at furnace bottom, add electrolytic copper copper coin 60kg, aluminium ingot 4.8kg, Cu-Mn master alloy 28kg(manganese content 35% again, remaining as copper content), Si1.6kg, heat up fusing, and the P-Cu master alloy (phosphorus content 10��12%, remaining as copper content) simultaneously adding 0.7��0.8kg carries out deoxidation, add charcoal to cover, temperature of fusion rises to more than 1100 DEG C, shortens smelting time as far as possible, reduces alloy air-breathing;

2. check in stove and remove the gred after expecting fusing completely, add 0.4��0.5kgP-Cu alloy (phosphor copper) and carry out deoxidation, the FM5908 brass bits material of 200��250kg is added every 20��30 minutes, after guaranteeing fusing completely, it is incubated 5-10 minute, after insulation terminates, add remaining electrolytic copper copper coin 80kg to lower the temperature, heat up after adding remaining 0.7��0.8kgP-Cu master alloy and the fusing of 91kg zinc ingot again boiling 2-3 minute, adds sodium aluminum fluoride, slagging-off;

3., after temperature is adjusted to 1090 DEG C��1130 DEG C, vertical semi-continuous casting is carried out;

4. 1650T or 2500T extrusion machine is used to be expressed to required bar size after ingot casting being cut to certain length.

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

Embodiment two

The complicated Cu alloy material of a kind of high-strength abrasion-proof, its weight percentages of components is as follows:

1. first 200kgFM5908 brass bits material is added at furnace bottom, add electrolytic copper copper coin 60kg, aluminium ingot 4.1kg, Cu-Mn master alloy 21kg(manganese content 35% again, remaining as copper content), Si1.8kg, heat up fusing, and the P-Cu master alloy (phosphorus content 10��12%, remaining as copper content) simultaneously adding 0.7��0.8kg carries out deoxidation, add charcoal to cover, temperature of fusion rises to more than 1100 DEG C, shortens smelting time as far as possible, reduces alloy air-breathing;

2. check in stove and remove the gred after expecting fusing completely, add 0.4��0.5kgP-Cu alloy (phosphor copper) and carry out deoxidation, the FM5908 brass bits material of 200��250kg is added every 20��30 minutes, after guaranteeing fusing completely, it is incubated 5-10 minute, after insulation terminates, add remaining electrolytic copper copper coin 85kg to lower the temperature, heat up after adding remaining 0.7��0.8kgP-Cu master alloy and the fusing of 92kg zinc ingot again boiling 2-3 minute, adds sodium aluminum fluoride, slagging-off;

3., after temperature is adjusted to 1090 DEG C��1130 DEG C, vertical semi-continuous casting is carried out;

4. 1650T or 2500T extrusion machine is used to be expressed to required bar size after ingot casting being cut to certain length.

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

Embodiment three

The complicated Cu alloy material of a kind of high-strength abrasion-proof, its weight percentages of components is as follows:

1. first 200kgFM5908 brass bits material is added at furnace bottom, add electrolytic copper copper coin 60kg, aluminium ingot 3.6kg, Cu-Mn master alloy 14kg(manganese content 35% again, remaining as copper content), Si2.4kg, heat up fusing, and the P-Cu master alloy (phosphorus content 10��12%, remaining as copper content) simultaneously adding 0.7��0.8kg carries out deoxidation, add charcoal to cover, temperature of fusion rises to more than 1100 DEG C, shortens smelting time as far as possible, reduces alloy air-breathing;

2. check in stove and remove the gred after expecting fusing completely, add 0.4��0.5kgP-Cu alloy (phosphor copper) and carry out deoxidation, the FM5908 brass bits material of 200��250kg is added every 20��30 minutes, after guaranteeing fusing completely, it is incubated 5-10 minute, after insulation terminates, add remaining electrolytic copper copper coin 87kg to lower the temperature, heat up after adding remaining 0.7��0.8kgP-Cu master alloy and the fusing of 90kg zinc ingot again boiling 2-3 minute, adds sodium aluminum fluoride, slagging-off;

3., after temperature is adjusted to 1090 DEG C��1130 DEG C, vertical semi-continuous casting is carried out;

4. 1650T or 2500T extrusion machine is used to be expressed to required bar size after ingot casting being cut to certain length.

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

Sampling carries out chemical composition analysis, 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 carries out mechanical behavior under high temperature test, and test-results is in table 2.

Table 3

Material of the present invention has good mechanical property, can extensively for the high-end product of automobile industry.

Claims (1)

1. the production method of a high-strength wear-resistant copper alloy material, it is characterised in that:

Described high-strength wear-resistant copper alloy material comprises the chemical composition of following percent mass: Cu57.0��60.0; Al1.5��2.0; Mn2.0��4.0; Fe��0.25; Si0.6��0.9; Pb0.3��0.6; All the other are Zn,

Its technological process of production is:

1. first 200kgFM5908 brass bits material is added at furnace bottom, add electrolytic copper copper coin 60��70kg again, aluminium ingot 3.5��5kg, manganese content be 35% Cu-Mn master alloy 15��30kg, Si1.5��2.5kg heat up fusing, add charcoal to cover simultaneously, temperature rises to 1100 DEG C, shorten smelting time as far as possible, reduce molten metal air-breathing;

2. after in stove, Cu melts completely, then FM5908 bits material is continued to add, after guaranteeing fusing completely, then add remaining 70��90kg electrolytic copper copper coin and it is cooled to 1000 DEG C, then Pb0.7��1.5kg, Zn80��95kg are all added, it is ensured that after Zn melts completely, add sodium aluminum fluoride refining, stir, slagging-off, leave standstill 5��10 minutes;

3., after temperature is adjusted to 1050 DEG C��1120 DEG C, vertical semi-continuous casting is carried out;

4. 1650T or 2500T extrusion machine is used to be expressed to required bar size after ingot casting being cut to certain length;

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