CN102776409B - Technology for preparing corrosion-resistant copper alloy - Google Patents

Abstract

The invention discloses a technology for preparing a corrosion-resistant copper alloy, which comprises the following compositions by weight percent:1.0-1.2% of Mn, 0.5-0.7% of Si, 0.05-0.15% of Fe, 0.8-1.2% of Mg, 2-4% of Zn, 11-13% of Al, 1.2-1.4% of Ti, 0.3-0.5% of Sc, 5.5-6.5% of Ni and 0.2-0.3% of composite mischmetal, wherein the mischmetal contains La and Ce mischmetal elements, the percentage of Ce is 30-50%, and the balance is Cu. The technology comprises the following steps: 1. smelting, refining and casting to form a bar; 2. heating the bar which is obtained in the step 1 to the temperature of 870-920 DEG C; then carrying out hot extruding on the bar to form a pipe billet; 3. heating the pipe billet which is obtained in the step 2 to be 850-900 DEG C, and rolling the pipe billet to form a pipe; 4. carrying out recrystallization annealing, annealing at the temperature of 800-820 DEG C, and thermally insulating for 3-5 hours; 5. drawing until a finished product specification is formed; and 6. finally, carrying out bright annealing, annealing at the temperature of 760-780 DEG C, and thermally insulating for 4-6 hours.

Description

A kind of preparation technology of Vulcan metal

Technical field

The present invention relates to copper alloy technical field, particularly a kind of preparation technology of Vulcan metal.

Background technology

The tube bank material using in briny environment at present mainly contains aluminum brass, and (Typical Representative is: C68700, its composition is 76～79wt%Cu, 1.8～2.5wt%Al, surplus is Zn), (Typical Representative is one-ton brass: C44300, its composition is 70～73wt%Cu, 0.8～1.2wt%Sn, 0.06wt%Fe, 0.02～0.06As, surplus is Zn), and Alpaka (Typical Representative is: C70600, and its composition is 9.0～11wt%Ni, 1.0～1.8wt%Fe, 1.0wt%Mn, 1.0wt%Zn, surplus is Cu; C71500, its composition is 29～33wt%Ni, 0.4～0.7wt%Fe, 1.0wt%Mn, 1.0wt%Zn, surplus is Cu), stainless steel (Typical Representative is 1Cr18Ni9Ti, 0Cr18Ni9Ti, 00Cr19Ni10 and 00Cr18Ni12Mo2) and titanium alloy (Typical Representative is TA2) etc.

Limitation and deficiency that above-mentioned tube bank material is used in corrosive environment of sea water are: aluminum brass and one-ton brass exist low strength, dealloying (dezincify, dealuminzation) and erosion corrosion seriously etc. not enough; There is the defects such as cost is high, processing is comparatively difficult in Alpaka; There is the problems such as cost is higher, marine biological polution is serious in titanium alloy and stainless steel.

Application number is CN200610039282.1, name is called in the patent of " seamless copper alloy tube for heat exchanger of fine corrosion resistance and preparation method thereof " provides a kind of seamless copper alloy tube for heat exchanger, on the basis of arsenic one-ton brass, the elements such as boron, nickel, manganese have been added again, improve the corrosion resistance of tubing, but cupronickel easily produces galvanic corrosion, and one-ton brass exists the problem of sherardizing steel ability always, limited under the condition that sea water desalinating plant is can only flow velocity lower and used.

The production technique of a kind of McGill metals pipe, rod is provided in the patent that and for example application number is CN200710106263.0, the most laggard extrusion molding of alloy cast ingot that contains copper, aluminium, nickel, iron, this alloy is used corrosion resistance nature also very unexcellent through reality, and this copper alloy can not be drawn into tubing, limited its application.

Summary of the invention

For the deficiencies in the prior art, one of object of the present invention is to provide a kind of preparation technology of Vulcan metal, the copper alloy seawater corrosion resistance of preparing by this technique and performance of flushing, high-wearing feature, high strength, and good processability.

For achieving the above object, the present invention adopts following technical scheme:

A preparation technology for Vulcan metal, this copper alloy is comprised of following component by weight percentage: Mn 1.0-1.2%, Si 0.5-0.7%, Fe 0.05-0.15%, Mg 0.8-1.2%, Zn 2-4%, Al 11-13%, Ti 1.2-1.4%, Sc 0.3-0.5%, Ni 5.5-6.5%, compound rare-earth 0.2-0.3%, wherein mishmetal is La, Ce mixed rare-earth elements, and the per-cent of Ce is 30-50%, and surplus is Cu.Described preparation technology comprises the steps:

1) select the master alloy of electrolytic copper, fine aluminium ingot, pure magnesium ingot, pure zinc ingot, all the other elements selections and copper, according to mentioned component, carry out proportioning, except aluminium and magnesium, all the other raw materials first carry out melting, until it, all after fusing, add fine aluminium ingot, pure magnesium ingot refining, refining temperature is 1170-1190 ℃, after refining 20-30 minute, is cast into bar.

2) by step 1) bar that obtains is heated to temperature 870-920 ℃; Then be hot extruded into pipe.

3) by step 2) heating of pipe blank that obtains is to 850-900 ℃, is rolled into pipe.

4) carry out recrystallization annealing, annealing temperature is 800-820 ℃, insulation 3-5 hour.

5) then carry out drawing, be drawn to the finished product specification.

6) finally carry out clean annealing, annealing temperature is 760-780 ℃, and soaking time is 4-6 hour.

Preparation method of the present invention has following beneficial effect:

1) on the basis of a large amount of orthogonal tests, adopt multicomponent alloy element, make these elements reach coordination technique effect, put forward heavy alloyed corrosion resisting property and mechanical property; By adding rare earth element, put forward heavy alloyed over-all properties;

2) for designed alloying element component, improve preparation technology, control refining temperature and time, make the content of element keep preset blending ratio, and make liquation pure; Adjust the temperature of extruding, rolling, recrystallization annealing and clean annealing, the above-mentioned actual temperature of using is all to consider on the basis of alloying constituent, through what determine after great many of experiments, after continuous like this processing, guaranteed the microtexture of alloy, and then determined that it has suitable performance.

Embodiment

Embodiment mono-

A preparation technology for Vulcan metal, this copper alloy is comprised of following component by weight percentage: Mn 1.0%, and Si 0.7%, Fe 0.05%, and Mg 1.2%, and Zn 2%, Al 13%, Ti1.2%, Sc 0.5%, and Ni 5.5%, compound rare-earth 0.3%, wherein mishmetal is La, Ce mixed rare-earth elements, and the per-cent of Ce is 30%, and surplus is Cu.Described preparation technology comprises the steps:

1) select the master alloy of electrolytic copper, fine aluminium ingot, pure magnesium ingot, pure zinc ingot, all the other elements selections and copper, according to mentioned component, carry out proportioning, except aluminium and magnesium, all the other raw materials first carry out melting, until it, all after fusing, add fine aluminium ingot, pure magnesium ingot refining, refining temperature is 1170 ℃, and refining was cast into bar after 30 minutes.

2) by step 1) bar that obtains is heated to temperature 870-920 ℃; Then be hot extruded into pipe.

3) by step 2) heating of pipe blank that obtains is to 850-900 ℃, is rolled into pipe.

4) carry out recrystallization annealing, annealing temperature is 800 ℃, is incubated 5 hours.

5) then carry out drawing, be drawn to the finished product specification.

6) finally carry out clean annealing, annealing temperature is 760 ℃, and soaking time is 6 hours.

Embodiment bis-

A preparation technology for Vulcan metal, this copper alloy is comprised of following component by weight percentage: Mn 1.2%, and Si 0.5%, Fe 0.15%, and Mg 0.8%, and Zn 4%, Al 11%, Ti 1.4%, and Sc 0.3%, and Ni 6.5%, compound rare-earth 0.2%, wherein mishmetal is La, Ce mixed rare-earth elements, and the per-cent of Ce is 50%, and surplus is Cu.Described preparation technology comprises the steps:

1) select the master alloy of electrolytic copper, fine aluminium ingot, pure magnesium ingot, pure zinc ingot, all the other elements selections and copper, according to mentioned component, carry out proportioning, except aluminium and magnesium, all the other raw materials first carry out melting, until it, all after fusing, add fine aluminium ingot, pure magnesium ingot refining, refining temperature is 1190 ℃, and refining was cast into bar after 20 minutes.

2) by step 1) bar that obtains is heated to temperature 870-920 ℃; Then be hot extruded into pipe.

3) by step 2) heating of pipe blank that obtains is to 850-900 ℃, is rolled into pipe.

4) carry out recrystallization annealing, annealing temperature is 820 ℃, is incubated 3 hours.

5) then carry out drawing, be drawn to the finished product specification.

6) finally carry out clean annealing, annealing temperature is 780 ℃, and soaking time is 4 hours.

Embodiment tri-

A preparation technology for Vulcan metal, this copper alloy is comprised of following component by weight percentage: Mn 1.1%, and Si 0.6%, Fe 0.010%, and Mg 1.0%, and Zn 3%, Al 12%, Ti 1.3%, and Sc 0.4%, and Ni 6.0%, compound rare-earth 0.25%, wherein mishmetal is La, Ce mixed rare-earth elements, and the per-cent of Ce is 40%, and surplus is Cu.Described preparation technology comprises the steps:

1) select the master alloy of electrolytic copper, fine aluminium ingot, pure magnesium ingot, pure zinc ingot, all the other elements selections and copper, according to mentioned component, carry out proportioning, except aluminium and magnesium, all the other raw materials first carry out melting, until it, all after fusing, add fine aluminium ingot, pure magnesium ingot refining, refining temperature is 1180 ℃, and refining was cast into bar after 25 minutes.

2) by step 1) bar that obtains is heated to temperature 870-920 ℃; Then be hot extruded into pipe.

3) by step 2) heating of pipe blank that obtains is to 850-900 ℃, is rolled into pipe.

4) carry out recrystallization annealing, annealing temperature is 810 ℃, is incubated 4 hours.

5) then carry out drawing, be drawn to the finished product specification.

6) finally carry out clean annealing, annealing temperature is 770 ℃, and soaking time is 5 hours.

Applicant's statement, the present invention illustrates detailed process equipment and process flow process of the present invention by above-described embodiment, but the present invention is not limited to above-mentioned detailed process equipment and process flow process, do not mean that the present invention must rely on above-mentioned detailed process equipment and process flow process and could implement.Person of ordinary skill in the field should understand, any improvement in the present invention, to the selection of the interpolation of the equivalence replacement of each raw material of product of the present invention and ancillary component, concrete mode etc., within all dropping on protection scope of the present invention and open scope.

Claims (1)

1. a preparation technology for Vulcan metal, is characterized in that, this copper alloy is comprised of following component by weight percentage: Mn 1.0-1.2%, Si 0.5-0.7%, Fe 0.05-0.15%, Mg 0.8-1.2%, Zn 2-4%, Al 11-13%, Ti 1.2-1.4%, Sc 0.3-0.5%, Ni 5.5-6.5%, mishmetal 0.2-0.3%, wherein mishmetal is La, Ce mixed rare-earth elements, the per-cent of Ce is 30-50%, and surplus is Cu; Described preparation technology comprises the steps:

1) select the master alloy of electrolytic copper, fine aluminium ingot, pure magnesium ingot, pure zinc ingot, all the other elements selections and copper, according to mentioned component, carry out proportioning, except aluminium and magnesium, all the other raw materials first carry out melting, until it, all after fusing, add fine aluminium ingot, pure magnesium ingot refining, refining temperature is 1170-1190 ℃, after refining 20-30 minute, is cast into bar;

2) by step 1) bar that obtains is heated to temperature 870-920 ℃; Then be hot extruded into pipe;

3) by step 2) heating of pipe blank that obtains is to 850-900 ℃, is rolled into pipe;

4) carry out recrystallization annealing, annealing temperature is 800-820 ℃, insulation 3-5 hour;

5) then carry out drawing, be drawn to the finished product specification;

6) finally carry out clean annealing, annealing temperature is 760-780 ℃, and soaking time is 4-6 hour.