CN108543946A - A kind of alloy kneading technique - Google Patents
A kind of alloy kneading technique Download PDFInfo
- Publication number
- CN108543946A CN108543946A CN201810525834.2A CN201810525834A CN108543946A CN 108543946 A CN108543946 A CN 108543946A CN 201810525834 A CN201810525834 A CN 201810525834A CN 108543946 A CN108543946 A CN 108543946A
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- Prior art keywords
- paraffin
- section
- segment
- temperature
- mixing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/10—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material
Abstract
The invention belongs to the technical fields of powder metallurgy, specifically disclose a kind of alloy kneading technique, include the following steps：1. be passed into mixing tube after paraffin is gasified, mixing tube includes first segment, second segment, third section and the 4th section；2. reducing the temperature of first segment；3. being entered the drive of metal powder oxygen in second segment using argon gas as current-carrying, while second segment is cooled down；4. reducing the temperature of third section；5. continuing the temperature of the 4th section of reduction；6. collecting residual metallic powder the 4th section of end；7. the paraffin in second segment, third section and the 4th section is scraped, and paraffin is put into mixing apparatus, carries out the mixing of different temperatures, rotor speed and time in three stages.Present invention aim to address metal powders, and non-uniform problem is mixed with bonding agent.
Description
Technical field
The invention belongs to the technical fields of powder metallurgy, specifically disclose a kind of alloy kneading technique.
Background technology
Hard alloy is hard compounds and binding metal one kind made of powder metallurgical technique of refractory metal
Alloy material, high, wear-resisting, intensity and a series of excellent performances such as toughness is preferable, heat-resisting, corrosion-resistant with hardness, especially
Its high rigidity and wearability is held essentially constant at a temperature of 500 DEG C, is still had at 1000 DEG C very high hard
Degree.
The production technology of hard alloy includes metal powder kneading, pre-burning stage, solid-phase sintering stage, liquid-phase sintering rank
Section and cooling stage.Metal powder kneading is to be uniformly mixed the various metal powders of hard alloy with bonding agent, existing viscous
The processes such as it is mostly paraffin powder to connect agent, and mixing aftershaping is sintered again.
Notification number is the Chinese patent of CN1956827B, discloses one kind and can inhibit material heat release to be kneaded and be deteriorated simultaneously
And the continuous kneading equipment with improved equipment life.It is a kind of twin shaft kneading equipment, screw rod group that there are two equipment tools,
Each screw rod group is disposed with blade section and bucket on the outer surface of rotary shaft, the tubulose being disposed therein with screw rod group
Room, and wherein h/D ratios are 0.01 or higher, wherein h be blade section tip and chamber inner wall surface between the gap that limits,
D is the internal diameter of room.The program can inhibit the heat release for being kneaded material, improve and be kneaded effect.But for hard alloy
For kneading, the density of metal powder is more than the density of binder powder, so if to metal powder and binder powder into
Row premixing, mixed effect is bad, is susceptible to the case where metal powder and binder powder are layered.If bonding agent melted
It is mixed again after change, when metal powder just touches bonding agent, metal powder will be sticky on bonding agent at once, so
It needs to carry out metal powder and bonding agent for a long time and the mixing of high intensity can just be such that the two is uniformly mixed, this can cause entirely
Activity time is elongated, and has higher requirement, the service life of most of mixing apparatus not high the intensity of mixing apparatus.
Invention content
The purpose of the present invention is to provide a kind of alloys to be kneaded technique, is mixed with to solve metal powder with bonding agent uneven
The problem of.
In order to achieve the above object, base case of the invention is：A kind of alloy kneading technique, includes the following steps：
Step 1：Heating paraffin is gasified to 400-500 DEG C, then gaseous paraffin is passed into mixing tube, the mixing
Pipe includes the first segment being sequentially communicated along gaseous paraffin flow direction, second segment, third section and the 4th section；
Step 2：The temperature of paraffin in first segment is reduced to 300-340 DEG C；
Step 3：Metal powder is uniformly mixed, and metal powder drive is entered second using argon gas as current-carrying
Duan Zhong, while cooling treatment is carried out to second segment, the temperature of paraffin in second segment is gradually reduced to 200-250 DEG C；
Step 4：The temperature of paraffin in third section is reduced to 50-70 DEG C；
Step 5：The temperature of paraffin in 4th section is reduced to 0-15 DEG C；
Step 6：Residual metallic powder is collected the 4th section of end；
Step 7：Paraffin in second segment, third section and the 4th section is scraped using paraffin scraping mechanism, the paraffin scraping mechanism packet
Motor, drive sprocket, driven sprocket and chain are included, the output end and drive sprocket of the motor are coaxially connected, and the chain is worn
Mixing tube is crossed, and is located at being partially around on drive sprocket and driven sprocket on the outside of mixing tube on chain, the chain includes
Several balls and connection strap, the ball and the setting of connection strap interval and adjacent ball and connection strap interconnection, the circle
The diameter of pearl is identical as the diameter of mixing tube；
Step 8：The paraffin scraped is put into mixing apparatus, is mixed in three stages；First stage is passed through argon gas guarantor
Shield, 200-250 DEG C of mixing temperature, mixing apparatus rotating speed 20-40rpm, incorporation time 10-15min；Second stage, mixing temperature
180-200 DEG C, mixing apparatus rotating speed 20-40rpm, incorporation time 10-15min；Phase III, 120-170 DEG C of mixing temperature mix
Close equipment rotating speed 30-60rpm, incorporation time 10-15min.
The operation principle and advantageous effect of this base case are：
In step 1, when by heating paraffin to 300-400 DEG C, paraffin can gasify, after the paraffin after gasification is passed through mixing tube,
Paraffin can be adhered on the tube wall of mixing tube；
In step 2, after the temperature of first segment is lowered to 300-340 DEG C, the boiling point of the temperature range and paraffin is close,
So if the temperature of paraffin continues to reduce, paraffin if, can gradually become liquid and rest on the tube wall of first segment；
In step 3, the paraffin of second segment is entered from first segment, temperature is gradually decrease to 200-250 DEG C, so this
When major part paraffin can become liquid and be stained on the tube wall of second segment, metal powder can be bonded in liquid after entering second segment at this time
On state paraffin.The follow-up surface for entering the paraffin in mixing tube and becoming after liquid and metal powder being adhered to, then it is subsequent
Metal powder is adhered to again on outermost paraffin, repeatedly in this way, metal powder can be completely mixed together with paraffin, together
When due to the sticky of paraffin it is good, so position of the metal powder in paraffin is stablized, larger displacement, only stone will not occur
Wax flowing can just drive metal powder to move；
Step 4：After the temperature of third section is reduced to 50-70 DEG C, although paraffin keeps the state of liquid, due to it
Temperature is low, so mobility is very low, sticky performance is stronger, can adsorb more metal powders；
Step 5：It flows to the 4th section of paraffin temperature and is lowered to 0-15 DEG C, paraffin can become solid-state, solid-state stone at this time
Wax can carry out subsequent mixing after collecting；
Step 6：Gaseous paraffin all becomes solid-state after the 4th section, and metal powder is by that after the 4th section, may go back
There is part metals powder to be not bonded on paraffin, these metal powders can continue to use after collecting；
Step 7：Start motor, motor drives drive sprocket rotation, drive sprocket to drive chain movement, when ball enters
To mixing tube and it is movable within when, ball can scrape the solid paraffin on the tube wall of mixing tube；
Step 8：It is mixed with a large amount of metal powder in paraffin due to putting into mixing apparatus, so mixing is set
Standby rotor speed is relatively low can also to make paraffin and metal powder be uniformly mixed.Three phases are divided to carry out paraffin and metal powder
Mixing can make the two mixing more uniform.
Further, in step 2, the temperature of paraffin is reduced to 320 DEG C in first segment.The temperature is higher than paraffin boiling point 2-10
DEG C or so, so, as long as will become liquid at once when the temperature of paraffin is in a slight decrease, metal powder can be bonded in paraffin
On.
Further, in step 3, the gas pressure of argon gas is 0.1-0.3MPa.Using this programme, the argon gas under the air pressure
Metal powder can be driven to flow, while air pressure and flow velocity are told somebody what one's real intentions are, and are bonded on paraffin convenient for metal powder.
Further, in step 5, to be passed through in the 4th section humidity be 85%-98% air, air pressure 0.05-
0.2MPa, air mass flow are 0.1-0.2 times of argon flow amount.Using this programme, part paraffin, which is blended in argon gas, not to be become
Liquid or solid-state, and moisture content is larger in the air of high humility, water is contacted with paraffin so that paraffin is quickly turned to solid-state.
Further, in step 7, the stearic acid of the 2-15% in terms of solid paraffin weight is added into mixing apparatus.Stearic acid
Be conducive to metal powder and wax moulding.
Further, further include step 9, processing, collected metal powder is dried in collected solid paraffin
End carries out high temperature dehydration.Due to being passed through the higher air of humidity in the 4th section, so the surface of paraffin and metal powder can be residual
There are water, drying process can remove the water of paraffin surface.And metal powder granulates are thinner, so needing high temperature dehydration ability
It is enough all to deviate from moisture.
Description of the drawings
Fig. 1 is the structural schematic diagram of mixing tube and paraffin scraping mechanism in embodiment.
Specific implementation mode
Below by specific implementation mode, the present invention is described in further detail：
Reference numeral in Figure of description includes：Mixing tube 1, the first air inlet pipe 2, the second air inlet pipe 3, first segment 4,
Two section 5, third section 6, the 4th section 7, drive sprocket 8, driven sprocket 9, ball 10, connection strap 11.
A kind of alloy of the present embodiment is kneaded technique, includes the following steps：
Step 1：Heating paraffin is gasified to 450 DEG C, then gaseous paraffin is passed into mixing tube 1, the mixing tube 1
Include the first segment 4 being distributed along gaseous paraffin flow direction, second segment 5, third section 6 and the 4th section 7；
Step 2：Paraffin temperature in first segment 4 is reduced to 320 DEG C；
Step 3：Metal powder is uniformly mixed, and is entered the drive of metal powder oxygen using argon gas as current-carrying
In second segment 5, the gas pressure of argon gas is 0.1MPa, while carrying out cooling treatment to second segment 5, gradually by stone in second segment 5
The temperature of wax is reduced to 200 DEG C；
Step 4：Paraffin temperature in third section 6 is reduced to 55 DEG C, paraffin gradually becomes solid-state at this time；
Step 5：4th section 7 of temperature is reduced to 10 DEG C, to be passed through in the 4th section 7 humidity be 95% air, air
Pressure is 0.05MPa, and air mass flow is 0.1 times of argon flow amount.
Step 6：Residual metallic powder is collected the 4th section 7 of end；
Step 7：Paraffin in second segment 5, third section 6 and the 4th section 7 is scraped using paraffin scraping mechanism.Paraffin scraping mechanism packet
Motor, drive sprocket 8, driven sprocket 9 and chain are included, the output end and drive sprocket 8 of motor are coaxially connected, and chain passes through mixing
Pipe 1, and it is located at being partially around on drive sprocket 8 and driven sprocket 9 on the outside of mixing tube 1 on chain.Chain includes several circles
Pearl 10 and connection strap 11, ball 10 and the setting of the interval of connection strap 11 and adjacent ball 10 and the interconnection of connection strap 11, ball
10 diameter is identical as the diameter of mixing tube 1；Start motor, motor drives drive sprocket 8 to rotate, and drive sprocket 8 drives chain
It is mobile, when ball 10 enter mixing tube 1 and it is movable within when, ball 10 can be by the solid-state stone on the tube wall of mixing tube 1
Wax scrapes；
Step 8：The paraffin scraped is put into mixing apparatus, in terms of solid paraffin weight 3% is added into mixing apparatus
Stearic acid is mixed in three stages；First stage, it is passed through argon gas protection, 230 DEG C, rotor speed 30rpm of mixing temperature mixes
Close time 12min；Second stage, 190 DEG C, rotor speed 35rpm, incorporation time 12min of mixing temperature；Phase III, mixing
150 DEG C, rotor speed 50rpm, incorporation time 12min of temperature；
Step 9：Processing is dried in collected solid paraffin, drying temperature is 45 DEG C, collected metal
Powder carries out high temperature dehydration, 250 DEG C of dehydration temperaturre.
Above-described is only the embodiment of the present invention, and the common sense such as well known concrete structure and characteristic are not made herein in scheme
Excessive description.It, without departing from the structure of the invention, can be with it should be pointed out that for those skilled in the art
Several modifications and improvements are made, these should also be considered as protection scope of the present invention, these all do not interfere with what the present invention was implemented
Effect and patent practicability.
Claims (6)
1. a kind of alloy is kneaded technique, it is characterised in that：Include the following steps：
Step 1：Heating paraffin is gasified to 400-500 DEG C, then gaseous paraffin is passed into mixing tube, the mixing tube packet
Include the first segment being sequentially communicated along gaseous paraffin flow direction, second segment, third section and the 4th section；
Step 2：The temperature of paraffin in first segment is reduced to 300-340 DEG C；
Step 3：Metal powder is uniformly mixed, and is entered metal powder drive in second segment using argon gas as current-carrying,
Cooling treatment is carried out to second segment simultaneously, the temperature of paraffin in second segment is gradually reduced to 200-250 DEG C；
Step 4：The temperature of paraffin in third section is reduced to 50-70 DEG C；
Step 5：The temperature of paraffin in 4th section is reduced to 0-15 DEG C；
Step 6：Residual metallic powder is collected the 4th section of end；
Step 7：Paraffin in second segment, third section and the 4th section is scraped using paraffin scraping mechanism, the paraffin scraping mechanism includes electricity
Machine, drive sprocket, driven sprocket and chain, the output end and drive sprocket of the motor are coaxially connected, and the chain passes through mixed
Pipe is closed, and is located at being partially around on drive sprocket and driven sprocket on the outside of mixing tube on chain, the chain includes several
Ball and connection strap, the ball and the setting of connection strap interval and adjacent ball and connection strap interconnection, the ball
Diameter is identical as the diameter of mixing tube；
Step 8：The paraffin scraped is put into mixing apparatus, is mixed in three stages；First stage is passed through argon gas protection, mixes
Close 200-250 DEG C of temperature, mixing apparatus rotating speed 20-40rpm, incorporation time 10-15min；Second stage, mixing temperature 180-
200 DEG C, mixing apparatus rotating speed 20-40rpm, incorporation time 10-15min；Phase III, 120-170 DEG C of mixing temperature, mixing is set
Standby rotating speed 30-60rpm, incorporation time 10-15min.
2. a kind of alloy according to claim 1 is kneaded technique, it is characterised in that：In step 2, paraffin in first segment
Temperature is reduced to 320 DEG C.
3. a kind of alloy according to claim 1 is kneaded technique, it is characterised in that：In step 3, the gas pressure of argon gas
For 0.1-0.3MPa.
4. a kind of alloy according to claim 3 is kneaded technique, it is characterised in that：In step 5, to being passed through in the 4th section
Humidity is the air of 85%-98%, and air pressure 0.05-0.2MPa, air mass flow is 0.1-0.2 times of argon flow amount.
5. a kind of alloy according to claim 1 is kneaded technique, it is characterised in that：In step 7, add into mixing apparatus
Enter the stearic acid of the 2-15% in terms of solid paraffin weight.
6. a kind of alloy as claimed in any of claims 1 to 5 is kneaded technique, it is characterised in that：It further include step
Nine, processing is dried in collected solid paraffin, collected metal powder carries out high temperature dehydration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810525834.2A CN108543946B (en) | 2018-05-28 | 2018-05-28 | Alloy mulling process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810525834.2A CN108543946B (en) | 2018-05-28 | 2018-05-28 | Alloy mulling process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108543946A true CN108543946A (en) | 2018-09-18 |
| CN108543946B CN108543946B (en) | 2020-01-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810525834.2A Active CN108543946B (en) | 2018-05-28 | 2018-05-28 | Alloy mulling process |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5435805A (en) * | 1977-08-26 | 1979-03-16 | Honda Motor Co Ltd | Method of producing ferrous powder sintered body |
| CN1956827A (en) * | 2004-06-03 | 2007-05-02 | 三菱重工业株式会社 | Continuous kneading device and kneading system using the same |
| US7585348B2 (en) * | 2004-03-08 | 2009-09-08 | Battelle Memorial Institute | Feedstock composition for powder metallurgy forming of reactive metals |
| CN106222465A (en) * | 2016-08-30 | 2016-12-14 | 河南省大地合金股份有限公司 | A kind of preparation method of hard alloy |
| CN106732073A (en) * | 2017-03-23 | 2017-05-31 | 烟台工程职业技术学院 | A kind of powder metallurgy mixing device |
| CN107034407A (en) * | 2017-05-27 | 2017-08-11 | 遵义中铂硬质合金有限责任公司 | A kind of production method of hard alloy |
-
2018
- 2018-05-28 CN CN201810525834.2A patent/CN108543946B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5435805A (en) * | 1977-08-26 | 1979-03-16 | Honda Motor Co Ltd | Method of producing ferrous powder sintered body |
| US7585348B2 (en) * | 2004-03-08 | 2009-09-08 | Battelle Memorial Institute | Feedstock composition for powder metallurgy forming of reactive metals |
| CN1956827A (en) * | 2004-06-03 | 2007-05-02 | 三菱重工业株式会社 | Continuous kneading device and kneading system using the same |
| CN106222465A (en) * | 2016-08-30 | 2016-12-14 | 河南省大地合金股份有限公司 | A kind of preparation method of hard alloy |
| CN106732073A (en) * | 2017-03-23 | 2017-05-31 | 烟台工程职业技术学院 | A kind of powder metallurgy mixing device |
| CN107034407A (en) * | 2017-05-27 | 2017-08-11 | 遵义中铂硬质合金有限责任公司 | A kind of production method of hard alloy |
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| CN108543946B (en) | 2020-01-07 |
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| CB03 | Change of inventor or designer information |
Inventor after: Ji Jianbin Inventor after: Hu Xiao Inventor after: Hu Guangqiang Inventor after: Zhao Wei Inventor before: Ji Jianbin Inventor before: Hu Xiao Inventor before: Hu Guangqiang Inventor before: Zhao Wei |
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| TR01 | Transfer of patent right |
Effective date of registration: 20220608 Address after: 412000 No. 102, plant 8, Jiade Industrial Park Phase II, No. 269, Jinlong East Road, Hetang District, Zhuzhou City, Hunan Province Patentee after: ZHUZHOU JINXIN CEMENTED CARBIDE Co.,Ltd. Address before: 563000 Xiangjiang Industrial Park, southern New District, Honghuagang District, Zunyi City, Guizhou Province Patentee before: ZUNYI ZHONGBO CEMENTED CARBIDE Co.,Ltd. |