CN109317933B - A kind of processing technology of lithium boron alloy - Google Patents
A kind of processing technology of lithium boron alloy Download PDFInfo
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- CN109317933B CN109317933B CN201811468481.3A CN201811468481A CN109317933B CN 109317933 B CN109317933 B CN 109317933B CN 201811468481 A CN201811468481 A CN 201811468481A CN 109317933 B CN109317933 B CN 109317933B
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Abstract
The invention belongs to the technical fields of intermetallic composite coating, and in particular to a kind of processing technology of lithium boron alloy.The technique are as follows: lithium boron alloy ingot is put into the alloy made-up belt that certain specification is squeezed into extrusion die cylinder first；Obtained alloy made-up belt is put into be vacuum-treated in furnace and carries out heat treatment process；Roller mill upper roller is put it into after cooling again and rolls into product, product is encapsulated into five layers of composite aluminium plastic bag.The processing technology increases cold extrusion and heat treatment two procedures, redistributes lithium in the alloy with boron, to keep the ingredient of material more uniform, improve the thermal stability of alloy material compared with traditional alloy Direct Rolling processing technology；And add and vacuumize and cooling system on extruder, avoid contact of the alloy with foreign gas and because the problems such as material alice cracks caused by temperature rise；Increased trimming machine and edge cutting machine ensure that the purity and regularity of alloy product in roll milling technology.
Description
Technical field
The invention belongs to the technical fields of intermetallic composite coating, and in particular to a kind of processing technology of lithium boron alloy.
Background technique
As the lithium system thermal cell anode material of latest generation, lithium boron alloy is excellent because of its higher voltage and capacity
Electric conductivity and thermal stability have attracted more and more attention from people.Because of the greatest differences of raw material lithium and boron on fusing point and density,
The reaction process of alloy and its complicated and changeable is prepared according to raw material proportioning, the difference of heat of reaction control and stirring condition
Many defects, uniform, the stability of product such as being mingled with easily occurs in alloy, hole, segregation are difficult to realize, and lithium boron alloy is dredged in addition
The porous embedding lithium structure of skeleton of pine, chemical property is extremely active, easily reacts with nitrogen, oxygen and wet air, because
This, it is extremely difficult will to obtain lithium boron alloy product uniform, that performance is stable.
Summary of the invention
Many defects such as the present invention easily occurs being mingled with for above-mentioned lithium boron alloy, hole, segregation, product it is uniform, stablize
Property the problems such as being difficult to realize, a kind of safe and reliable, totally-enclosed processing work that is pollution-free, can stablizing synthesis lithium boron alloy in batches is provided
Skill.
The technical scheme is that
A kind of processing technology of lithium boron alloy, comprising the following steps:
(1) cold-extrusion technology
Alloy pig is put into the extrusion die cylinder for having used lubricant lubricated, opening vacuumizing on extruder is
System adjusts extruding force and squeezes flow, alloy pig is squeezed into conjunction to extrusion cylinder vacuumize process to vacuum degree≤0.02MPa
Gold ribbon base 1；
Extruder cooling system is opened simultaneously, the alloy made-up belt 1 gone out to extrusion process cools down, it is ensured that temperature is lower than 50
℃；
(2) heat treatment process
After the lubricant on 1 surface of alloy made-up belt of extrusion forming is cleared up rapidly, it is put into and is vacuum-treated in furnace, in high-purity argon
500-700 DEG C, heating 0.5-6h are controlled in atmosphere, are cooled to room temperature, the alloy made-up belt 2 after being heat-treated；
(3) alloy rolling mill practice
After being removed the impurity on 2 surface of alloy made-up belt with trimming machine, it is introduced into roller mill and is rolled into the product of setting specification,
With five layers of composite aluminium plastic bag packing and storing of filling high-purity argon gas or dry air.
The features of the present invention is also:
The processing technology of lithium boron alloy of the invention, the dry environment that processing environment is 50 DEG C of dew point≤﹣.
In step (1), the lubricant be atoleine, pentane, dimethicone or boron nitride, purity >=
99.5%, water content≤0.02%.
In step (1), the pumped vacuum systems synchronous progress all on extruder with cooling system；The extruding force
It is 10-100m/min for 10-50Mpa, extruding flow.
In step (1), the described extrusion alloy made-up belt 1 with a thickness of 1-5mm.
In step (2), the heat treatment process is to be put into alloy made-up belt 1 in the melting kettle for being vacuum-treated furnace, close
Be honored as a queen vacuumize-argon filling replaces to water, oxygen content≤10ppm in furnace, open temperature control system, carried out in high-purity argon atmosphere
Heat treatment operation.
In step (3), the alloy rolling mill practice, trimming machine is located at the two sides up and down of alloy made-up belt 2, is unreeling rolling
Before, chip processing is carried out to the impurity on alloy strip base surface.
In step (3), described being introduced into roller mill is rolled, and specially alloy made-up belt 2 passes through roughing-finish rolling two procedures
Obtain the alloy strip product with raw edges.
In step (3), the roughing technique rolling deformation rate is 40-60%, and finish-rolling process rolling deformation rate is 20-
50%。
In step (3), it is configured with edge cutting machine after roller mill, alloy strip raw edges is carried out to cut processing, two sideline judges
Cutting size is 1-5mm.
In step (3), it can configure punching equipment after the edge cutting machine, the alloy of the different size of the market demand can be produced
Band, sheet material, the qualified product of the described rolling with a thickness of 0.1-1mm.
The beneficial effects of the present invention are:
The processing technology increases cold extrusion and heat treatment twice work compared with the direct extrusion-processing technology of traditional alloy
Sequence redistributes lithium in the alloy with boron, to keep the ingredient of material more uniform；Simultaneously through this procedure of Overheating Treatment,
Unreacted boron can react more sufficiently with lithium, and the alloy stability of generation is improved；And pumping is added on extruder
Vacuum and cooling system avoid contact of the alloy with impurity and because the problems such as material alice cracks caused by temperature rise；Roll milling technology
In increased trimming machine and edge cutting machine ensure that the purity and regularity of alloy product.
Detailed description of the invention
Fig. 1 is the processing process figure of lithium boron alloy.
Specific embodiment
A kind of processing method of lithium boron alloy of the present invention is described in detail below with reference to examples and drawings.
Embodiment 1
A kind of processing technology of lithium boron alloy, comprising the following steps: the processing technology of lithium boron alloy of the invention processes ring
The dry environment that border is 50 DEG C of dew point≤﹣.
(1) cold-extrusion technology
First mold is installed as desired, Φ 100mm, the alloy pig that lithium content is 60wt% are put into the nitrogen of Φ 110mm
In the extrusion die cylinder for changing boron (purity >=99.5%, water content≤0.02%) lubricated, the pumped vacuum systems on extruder is opened,
To extrusion cylinder vacuumize process to vacuum degree be 0.02MPa, control extruding force be 25Mpa, flow 20m/min, by alloy pig
Being squeezed into width is 110mm, the alloy made-up belt 1 with a thickness of 2.5mm；
Extruder cooling system is opened simultaneously, the alloy made-up belt 1 gone out to extrusion process cools down, it is ensured that temperature is lower than 50
℃。
(2) heat treatment process
After the lubricant on 1 surface of alloy made-up belt of extrusion forming is cleared up rapidly, alloy made-up belt 1 is put into vacuum processing furnace
Melting kettle in, carry out vacuumizing after sealing-argon filling replaces to water, oxygen content≤10ppm in furnace, open temperature control system,
500 DEG C, heating 2h are controlled in high-purity argon atmosphere, are cooled to room temperature, the alloy made-up belt 2 after being heat-treated.
The heat treatment process is that heat treatment operation is carried out in high-purity argon atmosphere.
(3) alloy rolling mill practice
After the impurity on 2 surface of alloy made-up belt is removed, being introduced into roughing operation and being rolled into width is 110mm, with a thickness of 1mm
Alloy strip, be resent to finishing rolling step, be rolled into width be 110mm, the alloy strip with a thickness of 0.5mm；It is cut out with cutting means
Be cut into width be 100mm, with a thickness of 0.5mm alloy strip harvest extra fine quality alloy volume, finally with filling high-purity argon gas or
Five layers of composite aluminium plastic bag packing and storing of person's dry air；
For the thermal cell being assembled into using this alloy product under 500 DEG C of operating temperatures, no lithium flooded conditions compare traditional processing
The alloy strip operating temperature of technique production is 50 DEG C high.
Embodiment 2
A kind of processing technology of lithium boron alloy, comprising the following steps:
(1) cold-extrusion technology
First mold is installed as desired, Φ 120mm, the alloy pig that lithium content is 55wt% are put into the liquid of Φ 140mm
The extrusion die cylinder of body paraffin lubricated opens the pumped vacuum systems on extruder, to extrusion cylinder vacuumize process to vacuum degree
For 0.02MPa, control extruding force be 28Mpa, flow 25m/min, it is 140mm, with a thickness of 2mm that alloy pig, which is squeezed into width,
Alloy made-up belt 1.
Meanwhile extruder cooling system is opened, the alloy made-up belt 1 gone out to extrusion process cools down, it is ensured that temperature is lower than
50℃。
(2) heat treatment process
After the lubricant on 1 surface of alloy made-up belt of extrusion forming is cleared up rapidly, it is put into and is vacuum-treated in furnace 7, high-purity
600 DEG C, heating 1.5h are controlled in argon atmospher, are cooled to room temperature, the alloy made-up belt 2 after being heat-treated.
(3) alloy rolling mill practice
Trimming machine is located at the two sides up and down of alloy made-up belt 2, before unreeling rolling, cuts to the impurity on alloy strip base surface
Bits processing, after being removed the impurity on 2 surface of alloy made-up belt with trimming machine, being introduced into roughing operation and being rolled into width is 140mm, thickness
Degree is the alloy strip of 0.8mm, is resent to finishing rolling step, is rolled into 140mm, the alloy strip with a thickness of 0.4mm；Use cutting means
Cutting edge be width be 130mm, the alloy strip with a thickness of 0.4mm.
With sheet-punching machine 15 by alloy strip be punched into diameter be 60mm, with a thickness of 0.4mm alloy disk be put into filling it is high-purity
Five layers of composite aluminium plastic bag packing and storing of argon gas or dry air.
For the thermal cell being assembled into using this alloy product under 550 DEG C of operating temperatures, no lithium flooded conditions compare traditional processing
The alloy strip operating temperature of technique production is 30 DEG C high.
Embodiment 3
A kind of processing technology of lithium boron alloy, comprising the following steps:
(1) cold-extrusion technology
First mold is installed as desired, Φ 125mm, the alloy pig that lithium content is 65wt% are being put into Φ 150mm just
In the extrusion die cylinder of pentane lubricated, the pumped vacuum systems on extruder is opened, to extrusion die cylinder vacuumize process to vacuum
Degree be 0.01MPa, control extruding force be 30Mpa, flow 30m/min, by alloy pig be squeezed into width be 150mm, with a thickness of
The alloy made-up belt 1 of 1.5mm.
Meanwhile extruder cooling system 4 is opened, the alloy made-up belt 1 gone out to extrusion process cools down, it is ensured that temperature is lower than
50℃；
(2) heat treatment process
After the lubricant on 1 surface of alloy made-up belt of extrusion forming is cleared up rapidly, it is put into and is vacuum-treated in furnace 7, high-purity
700 DEG C, heating 1h are controlled in argon atmospher, are cooled to room temperature, the alloy made-up belt 2 after being heat-treated.
(3) alloy rolling mill practice
After the impurity on 2 surface of alloy made-up belt is removed, is introduced into roughing operation be rolled into width for 150mm, with a thickness of
The alloy strip of 0.7mm, is resent to finishing rolling step, is rolled into 150mm, the alloy strip with a thickness of 0.5mm；With cutting means cutting edge
It is 140mm, with a thickness of the alloy strip of 0.5mm for width.
With sheet-punching machine 15 by alloy strip be punched into diameter be 70mm, with a thickness of 0.5mm alloy disk be put into filling it is high-purity
Five layers of composite aluminium plastic bag packing and storing of argon gas or dry air；
For the thermal cell being assembled into using this alloy strip steel rolled stock under 470 DEG C of operating temperatures, no lithium flooded conditions compare traditional processing
The alloy strip operating temperature of technique production is 50 DEG C high.
Although the preferred embodiment of the present invention is described above in conjunction with attached drawing, the invention is not limited to upper
The specific embodiment stated, the above mentioned embodiment is only schematical, is not restrictive, the skill of this field
Art personnel under the inspiration of the present invention, when not departing from invention objective and scope of the claimed protection, can also do
Many forms out, within these are all belonged to the scope of protection of the present invention.
Processing technology of the invention increases cold extrusion and heat treatment compared with traditional alloy Direct Rolling processing technology
Two procedures redistribute lithium in the alloy with boron, to keep the ingredient of material more uniform, the heat for improving alloy material is steady
It is qualitative；And add and vacuumize and cooling system on extruder, avoid contact of the alloy with foreign gas and because of temperature rise caused by
Material alice cracking the problems such as.Increased trimming machine and edge cutting machine ensure that the purity of alloy product and regular in roll milling technology
Degree.
Claims (10)
1. a kind of processing technology of lithium boron alloy, comprising the following steps:
(1) cold-extrusion technology
Alloy pig is put into the extrusion die cylinder for having used lubricant lubricated, opens the pumped vacuum systems on extruder, it is right
Extrusion cylinder vacuumize process adjusts extruding force and squeezes flow, alloy pig is squeezed into alloy made-up belt to vacuum degree≤0.02MPa
One；
Extruder cooling system is opened simultaneously, the alloy made-up belt one gone out to extrusion process cools down, it is ensured that temperature is lower than 50 DEG C；
(2) heat treatment process
After the lubricant on one surface of alloy made-up belt of extrusion forming is cleared up rapidly, it is put into and is vacuum-treated in furnace, in high-purity argon gas
500-700 DEG C, heating 0.5-6h are controlled in atmosphere, are cooled to room temperature, the alloy made-up belt two after being heat-treated；
(3) alloy rolling mill practice
It after being removed the impurity on two surface of alloy made-up belt with trimming machine, is introduced into roller mill and is rolled into the product of setting specification, use
Fill five layers of composite aluminium plastic bag packing and storing of high-purity argon gas or dry air.
2. a kind of processing technology of lithium boron alloy according to claim 1, it is characterised in that: the lithium boron alloy processing
Environment is the dry environment of dew point≤- 50 DEG C.
3. a kind of processing technology of lithium boron alloy according to claim 1, it is characterised in that: in step (1), the profit
Lubrication prescription is atoleine, pentane, dimethicone or boron nitride, purity >=99.5%, water content≤0.02%.
4. a kind of processing technology of lithium boron alloy according to claim 1, it is characterised in that: in step (1), the pumping
Vacuum system synchronous progress all on extruder with cooling system；The extruding force is 10-50Mpa, extruding flow is 10-
100m/min。
5. a kind of processing technology of lithium boron alloy according to claim 1, it is characterised in that: in step (1), the conjunction
Gold ribbon base one with a thickness of 1-5mm.
6. a kind of processing technology of lithium boron alloy according to claim 1, it is characterised in that: in step (2), the heat
Treatment process is to be put into alloy made-up belt one in the melting kettle for being vacuum-treated furnace, carry out vacuumizing after sealing-argon filling replace to
Water, oxygen content≤10ppm in furnace open temperature control system, heat treatment operation are carried out in high-purity argon atmosphere.
7. a kind of processing technology of lithium boron alloy according to claim 1, it is characterised in that: in step (3), the conjunction
Golden rolling mill practice, trimming machine is located at the two sides up and down of alloy made-up belt two, before unreeling rolling, to the impurity on alloy strip base surface into
Row chip processing.
8. a kind of processing technology of lithium boron alloy according to claim 1, it is characterised in that: in step (3), described draws
Enter in roller mill and roll, specially alloy made-up belt two obtains the alloy strip product with raw edges by roughing-finish rolling two procedures；
Further preferably, in step (3), the roughing technique rolling deformation rate is 40-60%, and finish-rolling process rolling deformation rate is
20-50%.
9. a kind of processing technology of lithium boron alloy according to claim 8, it is characterised in that: in step (3), after roller mill
It is configured with edge cutting machine, alloy strip raw edges is carried out to cut processing, both sides cutter size is 1-5mm.
10. a kind of processing technology of lithium boron alloy according to claim 9, it is characterised in that: described in step (3)
Punching equipment is configured after edge cutting machine, produces alloy strip steel rolled stock, the sheet material of the different size of the market demand, rolls the thickness of qualified product
Degree is 0.1-1mm.
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| CN102851561B (en) * | 2011-06-27 | 2014-04-23 | 北京有色金属研究总院 | Lithium boron alloy production process, and device thereof |
| CN104362330A (en) * | 2014-09-19 | 2015-02-18 | 青岛乾运高科新材料股份有限公司 | LiNixCo1-x-yMnyO2 cathode material coated with boron-lithium composite oxide and preparation method thereof |
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