CN102618750A - Tin brass alloy and manufacturing method thereof - Google Patents
Tin brass alloy and manufacturing method thereof Download PDFInfo
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Abstract
The invention discloses a tin brass alloy and a manufacturing method thereof. The tin brass comprises elements of , by mass, 69.0 to 71.0 percents of Cu, 0.8 to 1.3 percents of Sn, 0.02 to 0.06 percent of As, 0.01 to 0.08 percent of Ti, 0.01 to 0.08 percent of Zr, 0.005 to 0.08 percent of B, 0.02 to 0.06 percent of Sb, 0.05 to 1.2 percents of Ni, 0.05 to 0.70 percent of Mn, 0.05 to 0.10 percent of Fe, 0.15 to 0.6 percent of Al, 0.03 to 0.08 percent of P, 0.05 to 0.40 percent of rare earths, no more than 0.05 percent of impurities, and the balance Zn. The corrosion resistance and abrasion resistance of the alloy are greatly enhanced, usage requirements of different water qualities and different flow conditions in different areas of the north and south, coast and inland in China can be better met, the extremely durable temperature is increased, and requirements of usage of large supercritical sets in bad working environment and long service life are met.
Description
Technical field
The present invention relates to the processing of copper and copper alloy, belong to metallic material alloyization, material antiseptic and alloy melting technical field, relate in particular to a kind of corrosion-resistant, anti scuffing, long-life tin-brass alloy and melting method thereof.
Background technology
The commonly used work of HSn70-1 one-ton brass made condensing surface, is widely used as the condensing surface and the assembly of seagoing vessel, power station, beach, thermal power plant, and solidity to corrosion is the extremely important use properties of this alloy.The nominal zinc content of this alloy is about 29%, and zinc content is greater than 15% brass, easily under the influence of factor such as dezincify, can occur obvious stress corrosion failure tendency at unrelieved stress, the medium that causes the zinc selective dissolution and alloy itself.Zinc content is high more, unrelieved stress is big more, and corrosion tendency is big more, and dezincification of brass, stress corrosion and impingement corrosion are the roots of alloy corrosion, inefficacy.In the dezincify process, zinc is optionally removed and stays porous, is prone to crisp copper layer, zone of oxidation, normal brass base gradually by porous, be prone to crisp copper matrix replacement, finally cause tubing run-down.The prolong alloy HSn70-1 of widespread use at present; Its work-ing life is about 7-10; Be merely six to 1/7th of stainless steel tube work-ing life, can not satisfy the requirement in work-ing life of power station condenser far away, directly cause thermal power station's condensing surface to be substituted by stainless steel tube.
The HSn70-1 alloy reaches the purpose that suppresses dezincification of brass through adding As; Because As only can suppress single-phase alpha brass dezincify, and the nominal zinc content of HSn70-1 alloy is about 29%, and the zinc equivalent of tin is 2; The trend that forms the β phase is big, and the actual zinc equivalent of this alloy is about 31%.Under non-equilibrium crystallization condition, (alpha+beta) phase region can appear in this alloy, and the existence of As does not play restraining effect to the dezincify process of (alpha+beta) phase region.
China is vast in territory, and south is different with northern, coastal with landlocked condition of water quality, some areas such as northeast and North China, and the higher area of dissolved solid, suspended substance, saltiness and chloride ion content in the water body only has 5-8 the work-ing life of prolong sometimes.The water quality of different regions contains Cl
﹣, NH
4 ﹢, S0
4 2 –And the amount that contains suspended solids such as silt particle is different, and anti-corrosion, the anti-erosion performance of one-ton brass prolong proposed different requirement, could satisfy long-life request for utilization.
Existing HSn70-1 alloy only is suitable under the condition of fresh water, immobilized seawater, using, and when the abominable or water impact of condition of water quality is big, tends to occur phenomenons such as the tubing leakage rate is high, work-ing life is low, has a strong impact on the development of China's electric utility.In recent years, along with continuous advancement in technology, generating set develops to maximization, supercritical unit direction, and working temperature is higher, flow velocity is bigger, and condition of water quality is more abominable, and is increasingly high to the performance requriements of prolong alloy.
Summary of the invention
The object of the invention is exactly the deficiency that exists to above-mentioned prior art, and a kind of corrosion-resistant, anti scuffing, long lifetime tin-brass alloy and preparation method thereof are provided.
Above-mentioned purpose realizes through following proposal:
A kind of tin-brass alloy; It is characterized in that; The mass percent of said one-ton brass containing element is Cu 69.0-71.0%, Sn 0.8-1.3%, As 0.02-0.06%, Ti 0.01-0.08%, Zr 0.01-0.08%, B 0.005-0.08%, Sb 0.02-0.06, Ni 0.05-1.2%, Mn 0.05-0.70%, Fe 0.05-0.10%, Al 0.15-0.60%, P 0.03-0.08%, rare earth 0.05-0.40%; Total impurities is not more than 0.05%, and surplus is a zinc.
According to above-mentioned tin-brass alloy; It is characterized in that; Wherein Cu 69.0-71.0%, Sn 0.8-1.3%, As 0.03-0.06%, Ti0.03-0.06%, Zr0.02-0.05%, B0.01-0.05%, Sb 0.03-0.06%, Ni 0.5-0.9%, Al 0.35-0.50%, rare earth 0.10-0.30%; Total impurities is not more than 0.05%, and surplus is a zinc.
According to above-mentioned tin-brass alloy; It is characterized in that; Wherein Cu 69.0-71.0%, Sn 0.8-1.3%, As 0.03-0.06%, Ti 0.03-0.055%, Zr 0.02-0.05%, B 0.008-0.05%, Sb 0.03-0.05, Al 0.15-0.50%, Ni 0.20-0.60%, Mn 0.20-0.60%, rare earth 0.05-0.15%; Total impurities is not more than 0.05%, and surplus is a zinc.
According to above-mentioned tin-brass alloy; It is characterized in that; Wherein Cu 69.0-71.0%, Sn 0.8-1.3%, As 0.03-0.06%, Ti 0.03-0.06%, Zr 0.02-0.05%, B 0.05-0.08%, Sb 0.03-0.06, Ni 0.50-0.80%, Mn 0.30-0.50%, Fe 0.05-0.10%, Al 0.25-0.50%, rare earth 0.05-0.30%; Total impurities is not more than 0.05%, and surplus is a zinc.
A kind of method for preparing above-mentioned alloy is characterized in that, said method comprising the steps of:
⑴ add 59% copper, old material, covers charcoal, and the charcoal add-on is as the criterion can cover metal charge, and heating up makes its whole fusings;
⑵ add 0.05-0.10% iron, 0.20-0.90% nickel in the copper liquid, and stir with copper instrument, and it is fully dissolved;
⑶ add zinc and make its fusing under 1180-1190 ℃ of temperature condition, add copper-Xi master alloy subsequently, and making the Sn content in the alloy is 0.80-1.30%, and it is fully dissolved; Smelting temperature 1130-1160 ℃;
⑷ add easy scaling loss elemental copper-aluminium, copper-manganese master alloy in copper liquid; Add 10% copper simultaneously; Make aluminium, manganese content in the alloy be respectively 0.15-0.60%, 0.05-0.70%, treat that copper-aluminium, copper-manganese master alloy melt fully after, copper liquid temperature is adjusted between 1130-1160 ℃;
⑸ change copper liquid over to foundry furnace, and copper liquid temperature is adjusted between 1120-1160 ℃;
⑹ add copper-antimony successively in copper liquid, copper-arsenic fully dissolves it, makes antimony, arsenic content in the alloy be respectively 0.02-0.06%, 0.02-0.06%; Add copper-boron, copper-titanium, copper-zirconium master alloy subsequently, it is fully dissolved, make boron, titanium, zirconium content in the alloy be respectively 0.005-0.08%, 0.01-0.08%, 0.01-0.08%;
⑺ add copper-lightweight rare earth intermediate alloy in copper liquid; It is fully dissolved, and making the content of rare earth in the alloy is 0.05-0.40%, subsequently; Alloying constituent is carried out total analysis; Carry out necessary alloying element feed supplement or add copper watering down, make it meet the composition requirement of claims regulation, the satisfactory copper liquid temperature of composition is adjusted between 1150-1160 ℃;
⑻ to containing the tin-brass alloy of aluminium, as carrier gas, in copper liquid, is blown into the sodium aluminum fluoride of 0.02-0.05% with high pure nitrogen or argon gas; The gas duration of blast is 3-5 minute, after converting process finishes, and the charcoal that parches at copper liquid surface coverage one deck immediately; After treating that copper liquid leaves standstill 5-8 minute, can begin to drag for slag, casting.
Beneficial effect of the present invention: a kind of corrosion-resistant, the anti scuffing that the present invention relates to, long-life tin-brass alloy; Phase region characteristics according to alloy substrate; Adopt multicomponent trace element combined microalloying and pureization of alloy substrate means, solved traditional tin-brass alloy dezincify, run-down and problem that work-ing life is low.Corrosion resistant, the wear-corrosion resistance of alloy strengthen greatly; Can satisfy the request for utilization of China's the South and the North, coastal and landlocked different areas, different quality, different current stream condition condition preferably; Extremely durable temperature improves, and satisfies large and super-critical unit bad working environments and uses and the long lifetime requirement.
Embodiment
The mass percent of copper-nickel alloy alloy containing element of the present invention is: Cu 69.0-71.0%, Sn 0.8-1.3%, As 0.02-0.06%, Ti 0.01-0.08%, Zr 0.01-0.08%, B 0.005-0.08%, Sb 0.02-0.06, Ni 0.05-1.2%, Mn 0.05-0.70%, Fe 0.05-0.10%, Al 0.15-0.60%, P 0.03-0.08%, rare earth 0.05-0.40%; Total impurities is not more than 0.05%, and surplus is a zinc.
Perhaps; Cu 69.0-71.0%, Sn 0.8-1.3%, As 0.03-0.06%, Ti0.03-0.06%, Zr0.02-0.05%, B0.01-0.05%, Sb 0.03-0.06%, Ni 0.5-0.9%, Al 0.35-0.50%, rare earth 0.10-0.30%; Total impurities is not more than 0.05%, and surplus is a zinc.
Perhaps; Cu 69.0-71.0%, Sn 0.8-1.3%, As 0.03-0.06%, Ti 0.03-0.055%, Zr 0.02-0.05%, B 0.008-0.05%, Sb 0.03-0.05, Al 0.15-0.50%, Ni 0.20-0.60%, Mn 0.20-0.60%, rare earth 0.05-0.15%; Total impurities is not more than 0.05%, and surplus is a zinc.
Perhaps; Cu 69.0-71.0%, Sn 0.8-1.3%, As 0.03-0.06%, Ti 0.03-0.055%, Zr 0.02-0.05%, B 0.008-0.05%, Sb 0.03-0.05, Al 0.15-0.50%, Ni 0.20-0.60%, Mn 0.20-0.60%, rare earth 0.05-0.15%; Total impurities is not more than 0.05%, and surplus is a zinc.
Perhaps; Cu 69.0-71.0%, Sn 0.8-1.3%, As 0.03-0.06%, Ti 0.03-0.06%, Zr 0.02-0.05%, B 0.05-0.08%, Sb 0.03-0.06, Ni 0.50-0.80%, Mn 0.30-0.50%, Fe 0.05-0.10%, Al 0.25-0.50%, rare earth 0.05-0.30%; Total impurities is not more than 0.05%, and surplus is a zinc.
The preparation process of alloy:
⑴ add 59% copper, old material, and the charcoal add-on is as the criterion can cover metal charge, heats up to make its whole fusings;
⑵ add 0.05-0.10% iron, 0.20-0.90% nickel in the copper liquid, and stir with copper instrument, and it is fully dissolved;
⑶ add zinc and make its fusing under 1180-1190 ℃ of temperature condition, add copper-Xi master alloy subsequently, and making the Sn content in the alloy is 0.80-1.30%, and it is fully dissolved; Smelting temperature 1130-1160 ℃;
⑷ add easy scaling loss elemental copper-aluminium, copper-manganese master alloy in copper liquid; Add 10% copper simultaneously; Make aluminium, manganese content in the alloy be respectively 0.15-0.60%, 0.05-0.70%, treat that copper-aluminium, copper-manganese master alloy melt fully after, copper liquid temperature is adjusted between 1130-1160 ℃;
⑸ change copper liquid over to foundry furnace, and copper liquid temperature is adjusted between 1120-1160 ℃;
⑹ add copper-antimony successively in copper liquid, copper-arsenic fully dissolves it, makes antimony, arsenic content in the alloy be respectively 0.02-0.06%, 0.02-0.06%; Add copper-boron, copper-titanium, copper-zirconium master alloy subsequently, it is fully dissolved, make boron, titanium, zirconium content in the alloy be respectively 0.005-0.08%, 0.01-0.08%, 0.01-0.08%;
⑺ add copper-lightweight rare earth intermediate alloy in copper liquid; It is fully dissolved, and making the content of rare earth in the alloy is 0.05-0.40%, subsequently; Alloying constituent is carried out total analysis; Carry out necessary alloying element feed supplement or add copper watering down, make it meet the composition requirement of claims regulation, the satisfactory copper liquid temperature of composition is adjusted between 1150-1160 ℃;
⑻ to containing the tin-brass alloy of aluminium, as carrier gas, in copper liquid, is blown into the sodium aluminum fluoride of 0.02-0.05% with high pure nitrogen or argon gas; The gas duration of blast is 3-5 minute, after converting process finishes, and the charcoal that parches at copper liquid surface coverage one deck immediately; After treating that copper liquid leaves standstill 5-8 minute, can begin to drag for slag, casting.
The fusing point of nickel and iron all is higher than copper, and add-on is very little.After treating that whole fusings of copper material and temperature are suitable, add nickel and iron again, it is dissolved in the copper liquid.
Adopt the principle of low temperature zincification, reduce the scaling loss and the volatilization of zinc element.After adding zinc, treat that zinc all after the fusing, adds copper-Xi master alloy again.
After treating that zinc, copper-Xi master alloy all melt, add easy scaling loss elemental copper-aluminium, copper-manganese, copper-arsenic, copper-antimony master alloy again.Elder generation's zincification adds the purpose of copper-Xi, copper-aluminium, copper-manganese, copper-arsenic, copper-antimony master alloy again, is to utilize zinc to remove the oxygen in the copper liquid earlier, reduces the scaling loss that is prone to scaling loss element aluminum, manganese, arsenic, prevents to occur in the alloy SnO of indissoluble
2Particle.
In copper liquid, add copper-boron, copper-titanium, copper-zirconium master alloy, treat to add copper-rare earth intermediate alloy again after master alloy melts fully.
Boron, titanium, zirconium, REE all have certain modification effect, particularly titanium, zr element, add in the copper liquid as alterant.After these elements add copper liquid and fusing, must guard against copper liquid overtemperature and leave standstill overtime.Copper liquid overtemperature with leave standstill overtime all can causing and decompose as the metallic compound elementide of crystal seed, thereby lose metamorphism.Copper liquid temperature through after rotten the processing should not surpass the melting technology temperature; Being melted to the time of repose that copper liquid begins to come out of the stove between the casting fully from the alterant master alloy should not be above one hour.
⒀ will prevent the image that exceeds standard that the trace alloying element in the foundry furnace causes because of accumulative effect when carrying out founding and work continuously, increase and decrease the add-on of the trace element of next heat as one feels fit according to the chemical ingredients of furnace burdening.
Embodiment 1
With mass percent is that 59% Cu puts into the main frequency furnace melting, treat copper begin softening after, at copper surface coverage one deck charcoal.The consumption of charcoal is copper 15-25kg per ton.Smelting temperature is 1180-1200 ℃.In the copper liquid of fusing, add the Ni of mass percent 1.0%, metallic nickel is dissolved in the copper liquid through alloying.After treating Ni fusing, in copper liquid, add mass percent and be 0.8% Al and 10% Cu; Utilize the solution heat fusing cold burden copper of aluminium, reach the purpose that cuts down the consumption of energy with metal loss.After Al to be added and the Cu fusing, in copper liquid, add the Zn of mass percent 27 %, smelting temperature is 1160-1180 ℃; Adopt to add zincification behind the aluminium earlier, can utilize aluminium deoxidation and form alumina protective layer, reduce that copper liquid is air-breathing to be lost with zinc subsequently on copper liquid surface.After treating the Metal Zn fusing, in copper liquid, add Sn or Cu-Sn master alloy, the mass percent that makes Sn in the finished product alloy is 1.0%; In copper liquid, add Mn, the mass percent that makes Mn in the finished product alloy is 0.70%; In copper liquid, add the Cu-Ti master alloy, the mass percent that makes Ti in the finished product alloy is 0.05%; In copper liquid, add Fe, the mass percent that makes Fe in the finished product alloy is 0.09%; In copper liquid, add Cu-P, the mass percent that makes P in the finished product alloy is 0.06%; In copper liquid, add Sb, the mass percent that makes Sb in the finished product alloy is 0.05%; In copper liquid, add the Cu-Zr master alloy, the mass percent that makes Zr in the finished product alloy is 0.04%; In copper liquid, add the Cu-B master alloy, the mass percent that makes B in the finished product alloy is 0.04%; In copper liquid, add the Cu-As master alloy, the mass percent that makes As in the finished product alloy is 0.05%.In copper liquid, add lanthanum, cerium mischmetal or lanthanum, cerium mischmetal oxide compound, making the mass percent of lanthanum in the finished product alloy or cerium is 0.3%;
After the master alloy to be added fusing, copper liquid temperature is adjusted between 1160-1180 ℃, as carrier gas, in copper liquid, be blown into the sodium aluminum fluoride refining agent of 0.1%-0.2%, remove the alumina inclusion in the copper liquid with high pure nitrogen or argon gas.When being blown into, note not staying dead angle and blind area.The gas duration of blast is 3-5 minute.
Sampling analysis, treat that the alloying constituent conformance with standard requires after, copper liquid is warming up to 1160-1180 ℃, subsequently, come out of the stove.
Prepared in this way copper alloy composition is (mass percent): 0.96% Ni, 0.050% Ti, 0.55% Al, 25.8% Zn, 0.96% Sn, 0.66% Mn, 0.08% Fe, 0.063% P, 0.049% Sb, 0.041% Zr, 0.035% B, 0.044% As, total amount of rare earth 0.28% (containing lanthanum and cerium), surplus is a copper.
Embodiment 2
With mass percent is that 59% Cu puts into the main frequency furnace melting, treat copper begin softening after, at copper surface coverage one deck charcoal.The consumption of charcoal is copper 15-25kg per ton.Smelting temperature is 1180-1200 ℃.In the copper liquid of fusing, add the Ni of mass percent 0.8%, metallic nickel is dissolved in the copper liquid through alloying.After treating Ni fusing, in copper liquid, add mass percent and be 0.6% Al and 10% Cu; Utilize the solution heat fusing cold burden copper of aluminium, reach the purpose that cuts down the consumption of energy with metal loss.After Al to be added and the Cu fusing, in copper liquid, add the Zn of mass percent 27.5 %, smelting temperature is 1160-1180 ℃; Adopt to add zincification behind the aluminium earlier, can utilize aluminium deoxidation and form alumina protective layer, reduce that copper liquid is air-breathing to be lost with zinc subsequently on copper liquid surface.After treating the Metal Zn fusing, in copper liquid, add Sn or Cu-Sn master alloy, the mass percent that makes Sn in the finished product alloy is 1.0%; In copper liquid, add the Cu-Ti master alloy, the mass percent that makes Ti in the finished product alloy is 0.05%; In copper liquid, add Sb, the mass percent that makes Sb in the finished product alloy is 0.05%; In copper liquid, add the Cu-Zr master alloy, the mass percent that makes Zr in the finished product alloy is 0.04%; In copper liquid, add the Cu-B master alloy, the mass percent that makes B in the finished product alloy is 0.04%; In copper liquid, add the Cu-As master alloy, the mass percent that makes As in the finished product alloy is 0.05%.In copper liquid, add lanthanum, cerium mischmetal or lanthanum, cerium mischmetal oxide compound, making the mass percent of lanthanum in the finished product alloy or cerium is 0.2%;
After the master alloy to be added fusing, copper liquid temperature is adjusted between 1160-1180 ℃, as carrier gas, in copper liquid, be blown into the sodium aluminum fluoride refining agent of 0.1%-0.2%, remove the alumina inclusion in the copper liquid with high pure nitrogen or argon gas.When being blown into, note not staying dead angle and blind area.The gas duration of blast is 3-5 minute.
Sampling analysis, treat that the alloying constituent conformance with standard requires after, copper liquid is warming up to 1160-1180 ℃, subsequently, come out of the stove.
Prepared in this way copper alloy composition is (mass percent): 0.76% Ni, 0.052% Ti, 0.36% Al, 26.3% Zn, 0.93% Sn, 0.053% Sb, 0.043% Zr, 0.032% B, 0.047% As, total amount of rare earth 0.18% (containing lanthanum and cerium), surplus is a copper.
Embodiment 3
With mass percent is that 59% Cu puts into the main frequency furnace melting, treat copper begin softening after, at copper surface coverage one deck charcoal.The consumption of charcoal is copper 15-25kg per ton.Smelting temperature is 1180-1200 ℃.In the copper liquid of fusing, add the Ni of mass percent 0.6%, metallic nickel is dissolved in the copper liquid through alloying.After treating Ni fusing, in copper liquid, add mass percent and be 0.7% Al and 10% Cu; After Al to be added and the Cu fusing, in copper liquid, add the Zn of mass percent 27.5 %, smelting temperature is 1160-1180 ℃; After treating the Metal Zn fusing, in copper liquid, add Sn or Cu-Sn master alloy, the mass percent that makes Sn in the finished product alloy is 1.0%; In copper liquid, add Mn or Mu-Sn master alloy, the mass percent that makes Mn in the finished product alloy is 0.5%; In copper liquid, add the Cu-Ti master alloy, the mass percent that makes Ti in the finished product alloy is 0.05%; In copper liquid, add Sb, the mass percent that makes Sb in the finished product alloy is 0.05%; In copper liquid, add the Cu-Zr master alloy, the mass percent that makes Zr in the finished product alloy is 0.04%; In copper liquid, add the Cu-B master alloy, the mass percent that makes B in the finished product alloy is 0.04%; In copper liquid, add the Cu-As master alloy, the mass percent that makes As in the finished product alloy is 0.05%.In copper liquid, add lanthanum, cerium mischmetal or lanthanum, cerium mischmetal oxide compound, making the mass percent of lanthanum in the finished product alloy or cerium is 0.15%;
After the master alloy to be added fusing, copper liquid temperature is adjusted between 1160-1180 ℃, as carrier gas, in copper liquid, be blown into the sodium aluminum fluoride refining agent of 0.1%-0.2%, remove the alumina inclusion in the copper liquid with high pure nitrogen or argon gas.When being blown into, note not staying dead angle and blind area.The gas duration of blast is 3-5 minute.
Sampling analysis, treat that the alloying constituent conformance with standard requires after, copper liquid is warming up to 1160-1180 ℃, subsequently, come out of the stove.
Prepared in this way copper alloy composition is (mass percent): 0.56% Ni, 0.048% Ti, 0.43% Al, 26.0% Zn, 0.95% Sn, 0.43% Mn, 0.047% Sb, 0.033% Zr, 0.033% B, 0.044% As, total amount of rare earth 0.14% (containing lanthanum and cerium), surplus is a copper.
Embodiment 4
With mass percent is that 59% Cu puts into the main frequency furnace melting, treat copper begin softening after, at copper surface coverage one deck charcoal.The consumption of charcoal is copper 15-25kg per ton.Smelting temperature is 1180-1200 ℃.In the copper liquid of fusing, add the Ni of mass percent 0.8%, metallic nickel is dissolved in the copper liquid through alloying.After treating the Ni fusing.In copper liquid, add mass percent and be 0.7% Al and 10% Cu; After Al to be added and the Cu fusing, in copper liquid, add the Zn of mass percent 28 %, smelting temperature is 1160-1180 ℃.After treating Metal Zn fusing, in copper liquid, add Cu-Mn and Cu-Ti master alloy, make that the mass percent of Mn and Ti is 0.4% and 0.05% in the finished product alloy; In copper liquid, add Sn or Cu-Sn master alloy, the mass percent that makes Sn in the finished product alloy is 1.0%; In copper liquid, add Sb, the mass percent that makes Sb in the finished product alloy is 0.05%; In copper liquid, add Fe, the mass percent that makes Fe in the finished product alloy is 0.08%; In copper liquid, add the Cu-Zr master alloy, the mass percent that makes Zr in the finished product alloy is 0.04%; In copper liquid, add the Cu-B master alloy, the mass percent that makes B in the finished product alloy is 0.06%; In copper liquid, add the Cu-As master alloy, the mass percent that makes As in the finished product alloy is 0.05%.In copper liquid, add lanthanum, cerium mischmetal or lanthanum, cerium mischmetal oxide compound, making the mass percent of lanthanum in the finished product alloy or cerium is 0.09%;
After the master alloy fusing to be added, subsequently, alloying constituent is carried out total analysis; Carry out necessary alloying element feed supplement or add copper watering down; Make it meet the composition requirement of claims regulations, the satisfactory copper liquid temperature of composition adjusted between 1160-1180 ℃, with high pure nitrogen or argon gas as carrier gas; In copper liquid, be blown into the sodium aluminum fluoride refining agent of 0.1%-0.2%, remove the alumina inclusion in the copper liquid.When being blown into, note not staying dead angle and blind area.The gas duration of blast is 3-5 minute.
Sampling analysis, treat that the alloying constituent conformance with standard requires after, copper liquid is warming up to 1160-1180 ℃, subsequently, come out of the stove.
Prepared in this way copper alloy composition is (mass percent): 0.73% Ni, 0.42% Al, 0.042% Ti, 0.33% Mn, 0.34% Al, 26.9% Zn, 0.044% Sb, 0.99% Sn, 0.043% Zr, 0.052% B, 0.06% Fe, total amount of rare earth 0.10% (containing lanthanum and cerium), surplus is a copper.
Claims (5)
1. tin-brass alloy; It is characterized in that; The mass percent of said one-ton brass containing element is Cu 69.0-71.0%, Sn 0.8-1.3%, As 0.02-0.06%, Ti 0.01-0.08%, Zr 0.01-0.08%, B 0.005-0.08%, Sb 0.02-0.06, Ni 0.05-1.2%, Mn 0.05-0.70%, Fe 0.05-0.10%, Al 0.15-0.60%, P 0.03-0.08%, rare earth 0.05-0.40%; Total impurities is not more than 0.05%, and surplus is a zinc.
2. tin-brass alloy; It is characterized in that; Said one-ton brass comprises that the mass percent of element is Cu 69.0-71.0%, Sn 0.8-1.3%, As 0.03-0.06%, Ti 0.03-0.06%, Zr 0.02-0.05%, B 0.01-0.05%, Sb 0.03-0.06%, Ni 0.5-0.9%, Al 0.35-0.50%, rare earth 0.10-0.30%; Total impurities is not more than 0.05%, and surplus is a zinc.
3. tin-brass alloy; It is characterized in that; Said one-ton brass comprises that the mass percent of element is Cu 69.0-71.0%, Sn 0.8-1.3%, As 0.03-0.06%, Ti 0.03-0.055%, Zr 0.02-0.05%, B 0.008-0.05%, Sb 0.03-0.05, Al 0.15-0.50%, Ni 0.20-0.60%, Mn 0.20-0.60%, rare earth 0.05-0.15%; Total impurities is not more than 0.05%, and surplus is a zinc.
4. tin-brass alloy; It is characterized in that; Said one-ton brass comprises that the mass percent of element is Cu 69.0-71.0%, Sn 0.8-1.3%, As 0.03-0.06%, Ti 0.03-0.06%, Zr 0.02-0.05%, B 0.05-0.08%, Sb 0.03-0.06, Ni 0.50-0.80%, Mn 0.30-0.50%, Fe 0.05-0.10%, Al 0.25-0.50%, rare earth 0.05-0.30%; Total impurities is not more than 0.05%, and surplus is a zinc.
5. a method for preparing one of claim 1-4 said alloy is characterized in that, said method comprising the steps of:
⑴ add 59% copper, old material, covers charcoal, and the charcoal add-on is as the criterion can cover metal charge, and heating up makes its whole fusings;
⑵ add iron, nickel in the copper liquid, and stir with copper instrument, and it is fully dissolved;
⑶ add zinc and make its fusing under 1180-1190 ℃ of temperature condition, add copper-Xi master alloy subsequently, makes the Sn content in the alloy reach target value, and it is fully dissolved; Smelting temperature 1130-1160 ℃;
⑷ add easy scaling loss elemental copper-aluminium, copper-manganese master alloy in copper liquid; Add 10% copper simultaneously; Make aluminium, manganese content in the alloy reach target value respectively, treat that copper-aluminium, copper-manganese master alloy melt fully after, copper liquid temperature is adjusted between 1130-1160 ℃;
⑸ change copper liquid over to foundry furnace, and copper liquid temperature is adjusted between 1120-1160 ℃;
⑹ add copper-antimony successively in copper liquid, copper-arsenic fully dissolves it, makes antimony, arsenic content in the alloy reach target value respectively; Add copper-boron, copper-titanium, copper-zirconium master alloy subsequently, it is fully dissolved, make boron, titanium, zirconium content in the alloy reach target value respectively;
⑺ add copper-lightweight rare earth intermediate alloy in copper liquid; It is fully dissolved, make the content of rare earth in the alloy reach target value, subsequently; Alloying constituent is carried out total analysis; Carry out the alloying element feed supplement or add copper watering down, make it meet the composition requirement, the copper liquid temperature that will meet the composition requirement is adjusted between 1150-1160 ℃;
⑻ to containing the tin-brass alloy of aluminium, as carrier gas, in copper liquid, is blown into the sodium aluminum fluoride of 0.02-0.05% with high pure nitrogen or argon gas; The gas duration of blast is 3-5 minute, after converting process finishes, and the charcoal that parches at copper liquid surface coverage one deck immediately; After treating that copper liquid leaves standstill 5-8 minute, can begin to drag for slag, casting.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103602852A (en) * | 2013-11-08 | 2014-02-26 | 浙江八达铜业有限公司 | Tin brass strip and manufacturing method thereof |
| CN103725919A (en) * | 2014-01-03 | 2014-04-16 | 安新县华昌合金厂 | Lead-free brass alloy |
| CN104894413A (en) * | 2015-04-16 | 2015-09-09 | 新疆大学 | Copper and copper alloy temperature control-pressure regulation smelting method |
| CN108559927A (en) * | 2017-12-12 | 2018-09-21 | 维沃移动通信有限公司 | A kind of preparation method of hardware, hardware and mobile terminal |
| CN109434318A (en) * | 2018-11-09 | 2019-03-08 | 路达(厦门)工业有限公司 | A kind of tin-brass alloy solder |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103602852A (en) * | 2013-11-08 | 2014-02-26 | 浙江八达铜业有限公司 | Tin brass strip and manufacturing method thereof |
| CN103602852B (en) * | 2013-11-08 | 2015-06-17 | 浙江八达铜业有限公司 | Tin brass strip and manufacturing method thereof |
| CN103725919A (en) * | 2014-01-03 | 2014-04-16 | 安新县华昌合金厂 | Lead-free brass alloy |
| CN104894413A (en) * | 2015-04-16 | 2015-09-09 | 新疆大学 | Copper and copper alloy temperature control-pressure regulation smelting method |
| CN108559927A (en) * | 2017-12-12 | 2018-09-21 | 维沃移动通信有限公司 | A kind of preparation method of hardware, hardware and mobile terminal |
| CN109434318A (en) * | 2018-11-09 | 2019-03-08 | 路达(厦门)工业有限公司 | A kind of tin-brass alloy solder |
| CN109434318B (en) * | 2018-11-09 | 2021-08-31 | 路达(厦门)工业有限公司 | Tin brass alloy solder |
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