CN107164648B - A kind of grain refiner and its preparation and application of environmental protection brass - Google Patents
A kind of grain refiner and its preparation and application of environmental protection brass Download PDFInfo
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- CN107164648B CN107164648B CN201710325284.5A CN201710325284A CN107164648B CN 107164648 B CN107164648 B CN 107164648B CN 201710325284 A CN201710325284 A CN 201710325284A CN 107164648 B CN107164648 B CN 107164648B
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/06—Making non-ferrous alloys with the use of special agents for refining or deoxidising
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/03—Making non-ferrous alloys by melting using master alloys
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C9/00—Alloys based on copper
- C22C9/04—Alloys based on copper with zinc as the next major constituent
Abstract
The grain refiner and its preparation and application of environmentally friendly brass, composition weight percent is: Al-Sr alloy is that 36~38, Al-B alloy is 33~35; it be 5~8.5, NaAlF6 is 6~7.5 that Zr, which is 12~15, Al-Fe alloy; CaCO3 is 3~4, and surplus is inevitable impurity.The preparation process of grain refiner is simple; it is environment friendly and pollution-free; using effect is significant; the mobility of molten metal is improved after use; the crystal grain of environmentally friendly brass can be made to be decreased to 30-50 μm by original 70-100 μm; finished surface is more smooth, careful, improves flatness and finish and surface oxidation-resistant ability after polishing.
Description
Technical field
The present invention relates to a kind of fining agent of environmentally friendly brass and its preparation application methods, especially suitable for environmentally friendly silizin
Grain refiner and its preparation and application.
Background technique
Ledrite has high machinability, and excellent cold and hot casting character cuts frangible, workpieces processing any surface finish,
Be widely used in electronics telecommunication, household electrical appliances, aviation, five gold ornaments and bathroom water heating product, but the lead in ledrite be with
Free simple substance is present in solid solution, and when contacting with people, soil, water source, lead will enter in water and nature, makes to environment
It is also very big at harm, while to Health Impact.Environmentally friendly brass for meet the requirement of environmental protection, some substitution ledrites produces
Product come into being, such as silicon lead-free reflow, Bi brass, selenium brass etc..Since bismuth and selenium metal price are expensive, silicon metal price is reasonable,
And silizin has preferable machinability, wearability and cold and hot casting character, is a kind of preferable alternative environmentally protective brass
Material.
Environmentally friendly silizin is mainly used for the hot-water heatings component such as bathroom, valve, and production process is remelting-casting-cutting edge-finishing
Work-polishing-machining-plating-assembling-inspection-packaging-storage.It wherein casts, polishes and be electroplated and environmentally friendly silizin ingot casting is wanted
Ask very high, not only there is stringent Composition Control requirement, and there can be no impurity, stomata, be mingled with, also to make ingot casting crystal grain tiny
Even, metal fluidity is good, it is ensured that material has good machinability, guarantees do not occur phenomenon of rupture in punching course.In view of
This develops a kind of fining agent and its application method for environmentally friendly brass, in particular for the refinement of environmentally friendly silizin crystal grain refinement
Agent is particularly important.
CN201510714013 discloses a kind of silicon brass alloy and the preparation method and application thereof, multiple by addition B and Ti
Grain refiner is closed, regulates and controls the phase composition and its distribution of alloy, but do not refer to degree of grain refinement and function and effect.
Summary of the invention
The technical problem to be solved in the present invention is to develop a kind of grain refiner of environmentally friendly brass, and its prepares and make
With method, after the fining agent is added, the mobility for melting brass is improved, the brass ingot casting uniform small grains of casting, dendrite is few,
Quality of finish is good, effectively promotes the quality of environmentally friendly brass product.
The grain refiner of environmentally friendly brass, composition weight percent is: Al-Sr alloy is that 36~38, Al-B alloy is
It is 5~8.5, NaAlF6 be 6~7.5, CaCO3 is 3~4 that 33~35, Zr, which are 12~15, Al-Fe alloy, and surplus is inevitable
Impurity.
Sr content is 9~10% weight, surplus Al in the Al-Sr alloy；B content is 10 in the Al-B alloy
~12% weight, surplus Al；Fe content is 7~8% weight, surplus Al in the Al-Fe alloy.
A kind of grain refiner of silizin, composition are that Al-Sr alloy is 36~38% weight, and Al-B alloy is 35% weight
Amount, Al-Fe alloy are 5% weight, and Zr is 12~14% weight, and NaAlF6 is 6~7% weight, and CaCO3 is 3% weight, and surplus is not
It can avoid impurity.
A kind of grain refiner polishing one-ton brass, composition are that Al-Sr alloy is 36% weight, and Al-B alloy is 33% weight
Amount, Al-Fe alloy are 5.5% weight, and Zr is 15% weight, and NaAlF6 is 7.5% weight, and CaCO3 is 3% weight, and surplus is can not
Avoid impurity.
A kind of grain refiner of Bi brass, composition are that Al-Sr alloy is 38% weight, and Al-B alloy is 30% weight,
Al-Fe alloy is 8.5% weight, and Zr is 13% weight, and NaAlF6 is 7% weight, and CaCO3 is 3.5% weight, and surplus is inevitable
Impurity.
The preparation method of environmentally friendly brass grain refiner, by block-like Al-Sr alloy, Al-B alloy and Al-Fe alloy car
It is whittled into curling item and is broken into bits end, block-like zirconium is pulverized into thin shape, CaCO3 and NaAlF6 are commercially available white powder, will be upper
It states raw material to mix in proportion, stir evenly, it is spare to pour into encapsulation in copper foil.
The application method of environmentally friendly brass grain refiner, copper fusing, fishing slag after, by copper water temperature control 1050 DEG C~
1070 DEG C, 0.03%~0.06% fining agent for accounting for copper water amount is added, 1~5min is manually stirred after addition, last static 5~
10min, temperature start to cast at 1050~1060 DEG C.
As optimization, grain refiner is added after beating high pressure flame, is pressed at the 2/1 of copper water, stirring 1~
Static 5~10min is completed in 5min, stirring.
The present invention has the advantages that fining agent preparation process is simple, environment friendly and pollution-free, easy to use, significant effect is used
The crystallite dimension of environmentally friendly brass can be made to be decreased to 30-50 μm by original 60-100 μm afterwards, improve the mobility of molten metal, it is internal
Impurity also more uniform distribution, there is no the defects that point, meteor tail, recess are raised, and finished surface is more smooth, careful,
And surface of polished flatness and finish are more preferable, improve metal surface oxidation resistance.
Detailed description of the invention
Fig. 1 is 70 μm to be not added with fining agent crystallite dimension.
Fig. 2 is that 0.03% refinement dosage crystallite dimension of addition is 35 μm.
Fig. 3 is no added fining agent.
Fig. 4 is to add thin part agent.
Fig. 5 is 70 μm to be not added with fining agent crystallite dimension.
Fig. 6 is that 0.03% fining agent crystallite dimension of addition is 30 μm.
Fig. 7 is 60 μm of no added fining agent crystallite dimension.
Fig. 8 is 40 μm of 0.04% fining agent crystallite dimension of addition.
Fig. 9 is 60 μm of no added fining agent crystallite dimension.
Figure 10 is 35 μm of 0.04% fining agent crystallite dimension of addition.
Figure 11 is 1 50 μm of metallographic microscope 0.03%KBF4 crystallite dimension of comparative example.
Specific embodiment
The embodiment of the present invention is further described below in conjunction with attached drawing.
Embodiment 1
Al-Sr alloy 38wt% is chosen, Zr is 12 wt %, Al-B alloy, 35 wt %, Al-Fe alloy, 5 wt %,
NaAlF6 is that 7 wt %, CaCO3 are 3 wt %, prepares grain refiner according to the above ratio, powder raw material is full and uniform, recycles
Copper foil encapsulation.
Carry out environmentally friendly silizin meltings in 2 tons of line frequency furnaces, first melt alfer together with red copper, copper water at
Divide after the assay was approved, copper water temperature is controlled at 1050 DEG C~1070 DEG C, fining agent is added, the additional amount of fining agent is copper water
The 0.03% of total amount, carries out 3~5min of artificial stirring, last static 5~10min after addition, temperature is opened at 1050~1060 DEG C
Begin to cast.
After fining agent, silizin crystal grain is greatly refined, and crystallite dimension is decreased to 35 μm by original 70 μm, is had
Effect improves the mobility of molten metal, makes to be mingled with and is uniformly distributed, and product surface quality is bright and clean.As shown in FIG. 1 to FIG. 4, Fig. 2 and figure
4 be addition by example 1 group at grain refiner after, the metallographic microscope and ingot casting surface photo of silizin illustrate grain structure
Refinement and surface quality are highly polished.
Embodiment 2
Choosing Al-Sr alloy 36 wt %, Zr is 14 wt %, Al-B alloy, 35 wt %, Al-Fe alloy, 5 wt %,
NaAlF6 is that 6 wt %, CaCO3 are 4 wt %, and ratio prepares grain refiner, and fining agent powder raw material is full and uniform, then benefit
It is encapsulated with copper foil.
Silizin melting is carried out in 2 tons of line frequency furnaces, is first melted alfer together with red copper, copper water is at sorting
After testing qualification, copper water temperature is controlled at 1050 DEG C~1070 DEG C, 0.03% fining agent of copper water total amount is added, is carried out after addition
3~5min of artificial stirring, finally static 5~10min, temperature start to cast at 1050~1060 DEG C.
After fining agent, silizin crystal grain is greatly refined, and crystallite dimension is decreased to 30 μm by original 70 μm, is had
Effect improves the mobility of molten metal, makes to be mingled with and is uniformly distributed, and product surface quality is bright and clean.Shown in See Figure 5 and Fig. 6, Fig. 6 is
Obvious refinement is not added with by grain structure ratio after the grain refiner addition silizin of the present embodiment composition.
Embodiment 3
Choosing Al-Sr alloy 36 wt %, Zr is 15 wt %, Al-B alloy, 33 wt %, Al-Fe alloy, 5.5 wt %,
NaAlF6 is that 7.5 wt %, CaCO3 are 3 wt %, and ratio prepares grain refiner, and fining agent powder raw material is full and uniform, then
It is encapsulated using copper foil.
Carry out the meltings of environmental protection polishing tin copper ingot in 2 tons of line frequency furnaces, when copper water ingredient after the assay was approved, by copper water
At 1050 DEG C~1070 DEG C, additional amount is 0.04% fining agent of copper water total amount for temperature control.Artificial stirring 3 is carried out after addition
~5min, last static 5~10min, temperature start to cast at 1050~1060 DEG C.
After fining agent, silizin crystal grain is greatly refined, and crystallite dimension is decreased to 30 μm by original 60 μm, is had
Effect improves the mobility of molten metal, makes to be mingled with and is uniformly distributed, and product surface quality is bright and clean.It, can by Fig. 8 as shown in Fig. 7 and Fig. 8
The grain structure ratio that tin copper ingot is polished after obvious expression addition grain refiner is not added with obvious refinement.
Embodiment 4
Choosing Al-Sr alloy 38 wt %, Zr is 13 wt %, Al-B alloy, 30 wt %, Al-Fe alloy, 8.5 wt %,
NaAlF6 is that 7 wt %, CaCO3 are 3.5 wt %, and ratio prepares grain refiner, and fining agent powder raw material is full and uniform, then
It is encapsulated using copper foil.
Carry out the melting of Bi brass copper ingot in 2 tons of line frequency furnaces, when copper water ingredient after the assay was approved, by copper water temperature
At 1010 DEG C~1050 DEG C, additional amount is 0.04% fining agent of copper water total amount for control.Carried out after addition artificial stirring 3~
5min, last static 5~10min, temperature start to cast at 1020~1050 DEG C.
After fining agent, Bi brass crystal grain is greatly refined, and crystallite dimension is decreased to 35 μm by original 60 μm, is had
Effect improves the mobility of molten metal, makes to be mingled with and is uniformly distributed, and product surface quality is bright and clean.As shown in Fig. 9 and Figure 10, Figure 10 is pressed
Ratio addition grain refiner ratio is not added with obvious refinement.
Comparative example 1
Silizin melting is carried out in 2 tons of line frequency furnaces, is first melted alfer together with red copper, copper water is at sorting
After testing qualification, copper water temperature is controlled at 1050 DEG C~1070 DEG C, outsourcing fining agent KBF4 is chosen, copper water total amount is added
0.03% fining agent stirs 2.5min, and static 5min is completed in stirring, and static completion thermometric, which reaches 1030 DEG C, to cast.
After outsourcing fining agent, by being decreased to 50 μm by 70 μm originally, the refinement of comparative example 1 is not shown crystallite dimension
It writes, as shown in figure 11.
Table 1, the environmentally friendly brass grain refiner using effect table of comparisons
Table 1 shows that grain refiner of the invention is to the degree of grain refinement of silizin, one-ton brass and Bi brass better than existing
There are KBF4, and its polished surface finish, red punching is not cracked, and turning ability is all preferable.
Claims (5)
1. the grain refiner of environmentally friendly brass, composition weight percent is: Al-Sr alloy is that 36~38, Al-B alloy is 33
It is 5~8.5, NaAlF6 be 6~7.5, CaCO3 is 3~4 that~35, Zr, which are 12~15, Al-Fe alloy, and surplus is inevitable miscellaneous
Matter.
2. the grain refiner of environmental protection brass according to claim 1, it is characterized in that Sr content is in the Al-Sr alloy
9~10% weight, surplus Al；B content is 10~12% weight, surplus Al in the Al-B alloy；The Al-Fe is closed
Fe content is 7~8% weight, surplus Al in gold.
3. the grain refiner of environmental protection brass according to claim 1, it is characterized in that a kind of grain refiner of silizin,
Its form be Al-Sr alloy be 36~38% weight, Al-B alloy be 35% weight, Al-Fe alloy be 5% weight, Zr be 12~
14% weight, NaAlF6 are 6~7% weight, and CaCO3 is 3% weight, and surplus is inevitable impurity.
4. the grain refiner of environmental protection brass according to claim 1, it is characterized in that a kind of crystal grain for polishing one-ton brass is thin
Agent, composition are that Al-Sr alloy is 36% weight, and Al-B alloy is 33% weight, and Al-Fe alloy is 5.5% weight, Zr 15%
Weight, NaAlF6 are 7.5% weight, and CaCO3 is 3% weight, and surplus is inevitable impurity.
5. the application method of environmental protection brass grain refiner according to claim 1, it is characterized in that in copper fusing, fishing slag
Afterwards, copper water temperature is controlled at 1050 DEG C~1070 DEG C, 0.03%~0.06% fining agent for accounting for copper water amount is added, descendant is added
Work stirs 1~5min, last static 5~10min, and temperature starts to cast at 1050~1060 DEG C.
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| CN201710325284.5A CN107164648B (en) | 2017-05-10 | 2017-05-10 | A kind of grain refiner and its preparation and application of environmental protection brass |
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| CN201710325284.5A CN107164648B (en) | 2017-05-10 | 2017-05-10 | A kind of grain refiner and its preparation and application of environmental protection brass |
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| CN107164648B true CN107164648B (en) | 2018-12-28 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110923497B (en) * | 2019-10-29 | 2021-03-16 | 福建工程学院 | Intermediate alloy for refining crystalline structure of copper and copper alloy, preparation method and application process thereof |
| CN111218561B (en) * | 2019-11-11 | 2021-11-12 | 宁波长振铜业有限公司 | Composite refining agent for reducing impurity element aluminum in waste brass and use method thereof |
| CN111455200B (en) * | 2020-04-16 | 2022-02-15 | 宁波金田铜业(集团)股份有限公司 | Preparation method for directly producing copper ingot for environment-friendly bath by using scrap copper |
| CN113699394A (en) * | 2021-08-30 | 2021-11-26 | 宁波金田铜业(集团)股份有限公司 | Red copper refiner, preparation method and preparation method of red copper casting blank |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103056322A (en) * | 2013-01-28 | 2013-04-24 | 梧州漓佳铜棒有限公司 | Compound for producing brass rods from scrap copper by horizontal continuous casting and smelting method |
| CN105274387A (en) * | 2015-10-27 | 2016-01-27 | 华南理工大学 | Leadfree high-strength and corrosion-resistance silicon brass alloy easy to be cut and preparation method and application |
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- 2017-05-10 CN CN201710325284.5A patent/CN107164648B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103056322A (en) * | 2013-01-28 | 2013-04-24 | 梧州漓佳铜棒有限公司 | Compound for producing brass rods from scrap copper by horizontal continuous casting and smelting method |
| CN105274387A (en) * | 2015-10-27 | 2016-01-27 | 华南理工大学 | Leadfree high-strength and corrosion-resistance silicon brass alloy easy to be cut and preparation method and application |
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