CN106392085A - Ball grinding-diameter shrinkage reciprocating extruding method for circular curing of waste titanium chips - Google Patents
Ball grinding-diameter shrinkage reciprocating extruding method for circular curing of waste titanium chips Download PDFInfo
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- CN106392085A CN106392085A CN201611050381.XA CN201611050381A CN106392085A CN 106392085 A CN106392085 A CN 106392085A CN 201611050381 A CN201611050381 A CN 201611050381A CN 106392085 A CN106392085 A CN 106392085A
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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
- B22F8/00—Manufacture of articles from scrap or waste metal particles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
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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
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/20—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces by extruding
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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
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/24—After-treatment of workpieces or articles
-
- 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
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/20—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces by extruding
- B22F2003/208—Warm or hot extruding
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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
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/24—After-treatment of workpieces or articles
- B22F2003/248—Thermal after-treatment
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
Abstract
The invention proposes a ball grinding-diameter shrinkage reciprocating extruding method for circular curing of waste titanium chips. The method comprises the following steps: (1) the titanium chips are recovered and preheated; (2) the ball grinding is performed for the titanium chips; (3) the titanium chips are covered and packed; (4) the covered and packed titanium chips are coldly extruded at room temperature; (5) diameter shrinkage reciprocating extrusion high-temperature curing: a mold is heated to reach 570-600 DEG C; an upper punch applies the extruding force of 0.9-1.0 GPa; a lower punch applies the back pressure of -200 MPa; in the same pair of reciprocating extrusion molds, the room-temperature cold extruded titanium chips perform the diameter shrinkage extrusion, the ejection, the compression upsetting and the secondary diameter shrinkage extrusion deformation; and (6) quenching: massive titanium obtained in the diameter shrinkage reciprocating extrusion step is quenched and cooled to reach the room temperature through a water cooling mode. Through ball milling, oxides on the surfaces of the chips are totally crushed under collision and grinding of steel balls; and on the basis, the high-temperature extrusion curing is performed to cure the titanium chips as large-size massive titanium.
Description
Technical field
The present invention relates to metal material processing method, the ball milling-undergauge of more particularly, to a kind of discarded titanium chip circulation solidification
Reciprocating extrusion method.
Background technology
Titanium is the metals resources of high smelting cost, and its biocompatibility is excellent, corrosion resistance is good, mechanical property is suitable, is system
Make the important materials of medicine equipment, joint prosthesis, large-scale derived energy chemical container etc..But, in order to manufacture high accuracy Ti structure, need
Design larger allowance, substantial amounts of raw material translate into discarded chip.Traditional high temperature founding process energy consumption is big, pollution
Weight, efficiency is low, and cast sturcture's coarse grains, poor-performing.Solid phase circulates and remanufactures because avoiding high temperature founding, is to realize gold
Belong to resource high-efficiency, an effective way of cleaning circulation.By the literature search discovery to prior art, equal channel angular is squeezed
Pressure (Equal channel angular pressing, abbreviation ECAP) technology is applied to process borings, can refine crystalline substance
Grain, improves the microstructure form remanufacturing material, improves mechanical performance.Lapovok etc. exists《Journal of Materials
Science》Deliver " Multicomponent materials from machining on 1193-1204 page of volume 49 within 2014
Chips compacted by equal-channel angular pressing is (by Equal-channel Angular Pressing chip formation system
Standby multi-component material) " literary composition is it was recently reported that being mutually mixed, by the multigroup division of ECAP circular regeneration by aluminium chip and magnesium chip
Golden material；Luo etc. exists《Journal of Materials Science》Deliver on 4606-4612 page of volume 45 within 2010
“Recycling of titanium machining chips by severe plastic deformation
Consolidation (the severe plastic deformation solid cycle of titanium chip) " one literary composition, proposes by reclaiming 2 grades of discarded titanium (ASTM
Grade 2) chip, and to be circulated by ECAP technology and remanufacture block materials.Additionally, Valiev etc. exists《Advanced
Engineering Materials》Deliver " The innovation potential of on 527-533 page of volume 9 within 2007
Bulk nanostructured materials " (the innovation potentiality of bulk nanostructured material) one literary composition, proposes two-step method processing block
Super fine crystal material, this technology includes the ECAP pre-extrusion of 120 degree of corners, and two steps of final extruding, by this integrated
Manufacturing process, can be formed with the microelectron-mechanical part of axial symmetry ratchet outline shape by bar preparation.Aizawa etc. exists
《Materials Transactions》Deliver " Solid-state recycling of on 315-321 page of volume 43 within 2002
Recyclable aluminum wastes with in-process microstructure control " is (capable of circulation discarded
The solid cycle of aluminium and microstructure process control) literary composition, propose from Al-Si alloy chip, and mix Fe impurity, adopt
Block Al alloy super-fine material is prepared in multi-pass undergauge extruding, and its Rate of strain accumulation and working (machining) efficiency are significantly higher than traditional undergauge
Extrusion technique.
Ball milling (Ball milling, abbreviation BM) is a kind of severe plastic deformation being widely used in and preparing superfine powdery material
Technology.Retrieval to prior art literature finds, Mahboubi Soufiani etc. exists《Materials and Design》2012
" Formation mechanism and characterization of is delivered on 152-160 page of volume 37 of year
(prepared by mechanical alloying for nanostructured Ti6Al4V alloy prepared by mechanical alloying
The Forming Mechanism of Ti6Al4V alloy nanostructures and sign) " literary composition, report with titanium, aluminium, vanadium powder and micron as raw material, by BM skill
Art prepares the Ti-6Al-4V alloy of nanoscale (less than 100nm).Additionally, Zadra exists《Materials Science and
Engineering A》Deliver within 2013 that " Mechanical alloying of titanium be (titanium on 105-113 page of volume 583
Mechanical alloying) " literary composition, the Ti powder that initial feed is less than 150 μm, first pass through BM process, obtain the pure titanium less than 25 μm
Superfines, and block titanium is obtained by discharge plasma sintering.
The conventional art of discarded metal chip circular treatment is remelting and casting.However, high temperature founding energy consumption is big, pollution
Weight, efficiency is low, and cast sturcture's coarse grains, and mechanical performance is poor.For avoiding high temperature founding, solid-phase sintering mode can be adopted.
But, titanium (Ti) is the active metal being easy to aoxidize, and its chip surface oxide is with TiO2Form exists, and it is strong but pliable in texture, though
So through multi-pass ECAP process rear oxidation thing can crush to a certain extent, disperse, but, the continuous distributed of larger oxide
The metallurgical imperfection in microstructure will be formed, weaken the mechanical performance of material.Also there is the refinement limit in ECAP processing, that is, when dynamic
When recrystallization reaches balance with strain refinement effect, then ECAP will be difficult to make microstructure be refined to nanoscale further.And,
Under the conditions of 90 degree of corners, the equivalent strain that the processing of ECAP single pass produces is about 1, and in order to add up to strain, palpus multi-pass is repeatedly
Extruding, therefore the Rate of strain accumulation of ECAP has much room for improvement.Meanwhile, powder, after BM process, must be carried out hot pressed sintering or powder squeezes/forging
The subsequent treatment operations such as pressure are to obtain block materials, and in these operations, because heating (sintering) time is long, and dynamically tie again
The factors such as crystalline substance, will occur grain coarsening, weaken the strength of materials.And, traditional Hot-extrusion is still needed raising in working (machining) efficiency.
Above technical problem not yet solves well.
Content of the invention
It is an object of the invention to provide a kind of ball milling-undergauge reciprocating extrusion method of discarded titanium chip circulation solidification, improve
Strain Accumulation and working (machining) efficiency, prepare entirely densified blocks of large Ti material, realize discarded Ti chip efficient, clean back
Receive and recycle.
The present invention be employed technical scheme comprise that by its technical problem of solution,
Ball milling-undergauge reciprocating extrusion the method for discarded titanium chip circulation solidification, comprises the following steps：
(1) titanium chip recycling pretreatment：Using ethanol, titanium chip raw material are carried out, to remove the oil in raw material
Dirt and impurity.Titanium chip raw material can be using the chip being generated by 2 grades of titaniums that end mill processing obtains, and cleaning preferably employs super
The method of sound cleaning, such as clean, the ethanol of ethanol used preferably 99.9% in ultrasonic activation groove.
(2) ball-milling treatment of titanium chip：Pretreated titanium chip is inserted in the ball mill container including steel ball, simultaneously plus
Enter process control agent, ball milling 10-20 hour under the protection of inert gas atmosphere, rotating speed 280-350rpm；
Preferably, between described titanium chip and steel ball, mass ratio is 12-20:1, a diameter of 7-12mm of described steel ball, institute
State process control agent and be selected from stearic acid, straight iron powder etc., preferably stearic acid, the addition of described process control agent is 0.5-
2wt%.Inert gas can be nitrogen, argon gas, helium etc., preferably argon gas.Inert atmosphere is kept to be to prevent chip in ball
Over oxidation during mill.Again, it is preferred to by passing to liquid nitrogen circulation in external container, to reduce the friction temperature of chip-steel ball
Degree, and machine often runs 1-2 hour time-out 10-15 minute.
(3) the jacket encapsulation of titanium chip：One layer of kollag of steel cylinder outer wrapping, described drum diameter is slightly less than back and forth squeezes
Mould upstream channel diameter, steel cylinder-kollag is inserted cold stamping die, and its diameter is slightly less than reciprocal extruding mold upper channel
Diameter, titanium chip is filled in steel cylinder cavity, then with hand press by chip preliminary consolidation.
Preferably, described steel cylinder material be through annealing stainless steel, described kollag can be selected for graphite paper,
Masking foil etc., preferably graphite paper.
(4) jacket encapsulates the room temperature cold extrusion of titanium chip：Cold stamping die passage is inserted in jacket encapsulation titanium chip, by titaniferous
The cold stamping die of chip is installed on a hydraulic press, and drift is put into die inlet passage, and the pressure of constantly improve drift, to～
Stop pre-extrusion during 650MPa.This step can further improve the degree of packing of chip, prevents titanium chip excessive in hot setting
Oxidation.
(5) undergauge reciprocating extrusion hot setting processing：To 570-600 DEG C, upper punch applies 0.9～1.0GPa to heating mould
Extruding force, the back pressure of low punch offer～200MPa.In same pair reciprocating extrusion die, the titanium after room temperature cold extrusion is cut
Bits material experience undergauge extruding, ejection, compression is upset, and the complex deformation course such as undergauge extruding again, specifically, by titanium
The upper channel of reciprocal extruding mold inserted by chip cold-extruded pressed compact, and in the presence of upper low punch pressure reduction, base of colding pressing is extruded by undergauge,
Chip is solidified further.And then, remove upper punch pressure, the pressure being provided by low punch by Ti chip sample by under
Supreme eject to upper channel；Again apply pressure to upper punch, and improve lower punch pressure to balance to upper punch, titanium sample
Compressed upset under balance static pressure effect；Reduce lower punch pressure, then titanium sample occurs second to contract under differential pressure action
Footpath extrudes, and starts new round reciprocating extrusion operation.
(6) quench：The block titanium obtaining in undergauge reciprocating extrusion step is quickly quenching into room temperature by water-cooling pattern.
It is an advantage of the current invention that the method practicality simple to operate, controllability is strong, high in machining efficiency.By implementing at BM
Reason, chip surface oxide (TiO2) completely crushed under the collision of steel ball, stranding stone roller, effectively prevent larger oxide to lack
Sunken continuity distribution and gathering.On this basis, implement high temperature extrusion solidification processing, BM-Ti chip is solidified into large scale
Block Ti material.In same pair extrusion die, Ti chip material experiences Simulation Based On Multi-step deformation mechanisms, and Strain Accumulation efficiency is able to larger
Improve.Meanwhile, the apparatus structure that the method adopts is compact, and processing is fast.Realize the full densification of chip sample by reciprocating extrusion
Solidification and ejection device, obtain the grained material of even tissue, and thoroughly eliminate porosity defects.Because extrusion temperature controls in Ti
Recrystallization temperature (～600 DEG C) below, therefore compared to high temperature founding (～1200 DEG C) or discharge plasma sintering (～900 DEG C)
Deng other technology, its reciprocal undergauge extrusion technique can suppress grain coarsening effectively, after retaining BM process to the full extent
Ultra-fine microstructure.Using this technical finesse 2 grades of Ti (ASTM Grade 2) chip, by remanufacturing, regenerate the strong of Ti material
Degree is higher than 2 grades of Ti business bars.The method is a kind of metals resources solid phase circular treatment technology of high-efficiency cleaning, which obviates height
Warm founding is it is adaptable to carrying out the recovery of high smelting cost metals resources with Ti as representative and remanufacturing.
Brief description
Fig. 1 is that the technique of the ball milling-undergauge reciprocating extrusion method of discarded titanium chip circulation solidification proposed by the present invention is illustrated
Figure, in figure, 1, upper punch, 2, reciprocal reducing extrusion die, 3, titanium chip sample, 4, low punch.
Specific embodiment
In order that technological means, creation characteristic, reached purpose and effect that the present invention realizes are easy to understand, tie below
Close diagram and specific embodiment, the present invention is expanded on further.
Embodiment：
(1) Ti chip recycling pretreatment：The chip being generated with 2 grades of Ti of end mill (ASTM Grade 2), as raw material, is searched
After collection chip, using inductively coupled plasma atomic emission spectrum (Inductively coupled plasma atomic
Emission spectroscopy, abbreviation ICP-AES) analyze its chemical composition (mass percent, wt.%), analysis result is such as
Shown in table 1.As shown in Table 1,2 grades of its chemical composition of Ti chips (oxygen content) through Milling Process meet ASTM standard scope.With
When, the ethanol using 99.9% cleans Ti chip in ultrasonic activation groove, to remove the greasy dirt in raw material and impurity etc..
(2) the BM process of Ti chip：Steel BM container will be inserted by the Ti chip that step (1) obtains, chip is (straight with steel ball
Footpath 10mm) between mass ratio be 15:1.Meanwhile, add the stearic acid of 1wt.% as process control agent, and BM container is filled with
Argon gas as protection atmosphere, to prevent chip over oxidation during BM.The rotating speed of planetary BM machine is 300rpm；BM transports
Row total duration is 15 hours.During BM, Ti chip issues raw food weldering, hardens and broken with rubbing stone roller with the hands in the shock of steel ball.Logical
Cross BM processing, Ti chip profile size and oxide on surface are significantly refined.Meanwhile, by external container liquid nitrogen circulation with
Reduce the friction temperature of chip-steel ball, and machine often runs 1 hour and will suspend 12 minutes.After BM terminates, using ICP-AES
Analysis chip chemical composition, result is as shown in table 1.As shown in Table 1, under argon gas protection, its oxygen contains the Ti chip through BM process
Amount only slightly rises (rising to 0.17wt% by 0.15wt%), and iron content rises to 0.64wt% by 0.10wt%, this be due to
Caused by during BM, steel ball (and steel vessel wall) is worn and is mixed into chip.
(3) the jacket encapsulation of BM-Ti chip：Steel cylinder (material：Annealing stainless steel) one layer of graphite paper of outer wrapping (as
Kollag), described drum diameter is slightly less than reciprocal extruding mold upper channel diameter, steel cylinder-kollag is inserted cold
Compression mould (its diameter is slightly less than the diameter of reciprocal extruding mold upper channel), will be filled to by the BM-Ti chip that step (2) obtains
In steel cylinder cavity, then with hand press by chip preliminary consolidation.
(4) jacket encapsulates the room temperature cold extrusion of BM-Ti chip：Cold stamping die passage is inserted in jacket encapsulation BM-Ti chip,
Cold stamping die containing Ti chip is installed on a hydraulic press, drift is put into die inlet passage, and the pressure of constantly improve drift
By force, to stopping pre-extrusion during～650MPa.This step can further improve the degree of packing of chip, prevents BM-Ti chip in high temperature
Over oxidation in solidification.Measure through Archimedes method (Archimedes), its relative density of Ti chip of room temperature pre-extrusion>
99.0%.
(5) parallel channels corner-undergauge Compound Extrusion hot setting processing：Wrap up mould with armouring electric blanket, be heated to
The recrystallization temperature (～600 DEG C) of Ti certain level (for example, 600 DEG C) below, and by temperature controller equilibrium temperature ± 1
DEG C scope.The Ti chip obtaining for step (4) is colded pressing base, carries out hot setting processing.Processing speed～5mm/min.On
Drift 1 applies the extruding force of 0.9～1.0GPa, and low punch 4 provides～back pressure of 200MPa.In same pair reciprocating extrusion die
In 2, the Ti chip 3 experience undergauge after room temperature cold extrusion extrudes, ejection, and compression is upset, and the complicated change such as undergauge extruding again
Shape course, specifically, Ti chip cold-extruded pressed compact is inserted the upper channel of reciprocal extruding mold, in the effect of upper low punch pressure reduction
Under, base of colding pressing is extruded by undergauge, and chip is solidified further.And then, remove upper punch pressure, provided by low punch
Pressure ejects Ti chip sample from the bottom to top to upper channel；Again apply pressure to upper punch, and improve lower punch pressure
Balance to upper punch, Ti sample is compressed upset under balance static pressure effect；Reduce lower punch pressure, then in differential pressure action
There is second undergauge extruding in lower Ti sample, start new round reciprocating extrusion operation.The present invention carries out two-wheeled extrusion process altogether, foot
With full compact curing Ti chip pressed compact.
(6) quench：The block Ti material being obtained by step (5) is quickly quenching into room temperature by water-cooling pattern.
Measured by Archimedes method, block remanufactures Ti material and realizes entirely densified (nearly 99.99%) of relative density.Sweeping
Retouch multiple spot under electron microscope to observe, do not find that microscopic void exists.Ti material chemical composition, its result are analyzed using ICP-AES
As shown in table 1.As shown in Table 1, the oxygen content remanufacturing Ti material rises to 0.27wt% by the 0.15wt% of original chip, still approximately
Oxygen content in 2 grades of Ti (ASTM Grade 2).Meanwhile, by wire cutting～4.00 × 4.00 × 6.00mm sample, and ten thousand
Performance test can be carried out in Material Testing Machine, find to remanufacture yield strength 500-600MPa of Ti material.
Table 1 is using the initial Ti chip of ICP-AES technical Analysis, and BM process (BM-Ti) and reciprocal undergauge extruding remanufacture
The chemical composition of Ti chip afterwards.
Table 1
| Element | O | N | C | Fe |
| Initial Ti chip (wt.%) | 0.15 | <0.01 | <0.01 | 0.10 |
| BM-Ti chip (wt.%) | 0.17 | <0.01 | 0.22 | 0.64 |
| Reciprocal undergauge extruding Ti chip (wt.%) | 0.27 | 0.04 | 0.25 | - |
Embodiment of above only technology design to illustrate the invention and feature, its object is to allow those skilled in the art
Member understands present disclosure and is carried out, and can not be limited the scope of the invention with this, all spiritual according to the present invention
Equivalence changes or modification that essence is done, all should cover within the scope of the present invention.
Claims (7)
1. ball milling-undergauge reciprocating extrusion the method discarding titanium chip circulation solidification is it is characterised in that comprise the following steps：
(1) titanium chip recycling pretreatment：Using ethanol, titanium chip raw material are carried out, with remove the greasy dirt in raw material and
Impurity；
(2) ball-milling treatment of titanium chip：Pretreated titanium chip is inserted in the ball mill container including steel ball, was simultaneously introduced
Program control preparation, ball milling 10-20 hour under the protection of inert gas atmosphere, rotating speed 280-350rpm；
(3) the jacket encapsulation of titanium chip：One layer of kollag of steel cylinder outer wrapping, steel cylinder-kollag is inserted cold stamping die
Tool, titanium chip is filled in steel cylinder cavity, then with hand press by chip preliminary consolidation；
(4) jacket encapsulates the room temperature cold extrusion of titanium chip：Cold stamping die passage is inserted in jacket encapsulation titanium chip, by titaniferous chip
Cold stamping die install on a hydraulic press, drift is put into die inlet passage, and the pressure of constantly improve drift, to～
Stop pre-extrusion during 650MPa；
(5) undergauge reciprocating extrusion hot setting processing：To 570-600 DEG C, upper punch applies squeezing of 0.9～1.0GPa to heating mould
Pressure, the back pressure of low punch offer～200MPa, the titanium chip material in same pair reciprocating extrusion die, after room temperature cold extrusion
Material experience undergauge extruding, ejection, compression is upset, and undergauge crimp course again；Specifically, by titanium chip cold-extruded pressed compact
Insert the upper channel of reciprocal extruding mold, in the presence of upper low punch pressure reduction, base of colding pressing is extruded by undergauge, and chip is entered one
Step solidification, and then, removes upper punch pressure, titanium chip sample is ejected supreme by pressure from the bottom to top that provided by low punch
Portion's passage, again to upper punch apply pressure, and improve lower punch pressure to upper punch balance, titanium sample balance static pressure
Compressed upset under effect；Reduce lower punch pressure, then titanium sample occurs second undergauge extruding under differential pressure action, starts new
One wheel reciprocating extrusion operation.
(6) quench：The block titanium obtaining in undergauge reciprocating extrusion step is quickly quenching into room temperature by water-cooling pattern.
2. ball milling-undergauge reciprocating extrusion the method for discarded titanium chip circulation solidification according to claim 1, its feature exists
In, in step (1), the chip that titanium chip raw material are generated by the 2 grades of titaniums being obtained by end mill processing.
3. ball milling-undergauge reciprocating extrusion the method for discarded titanium chip circulation solidification according to claim 1, its feature exists
In, in step (1), the method using being cleaned by ultrasonic for the cleaning, ethanol is 99.9% ethanol.
4. ball milling-undergauge reciprocating extrusion the method for discarded titanium chip circulation solidification according to claim 1, its feature exists
In, in step (2), between titanium chip and steel ball, mass ratio is 12-20:1, a diameter of 7-12mm of steel ball.
5. ball milling-undergauge reciprocating extrusion the method for discarded titanium chip circulation solidification according to claim 1, its feature exists
In in step (2), process control agent is stearic acid or straight iron powder, and the addition of process control agent is 0.5-2wt%, indifferent gas
Body is nitrogen, argon gas or helium.
6. ball milling-undergauge reciprocating extrusion the method for discarded titanium chip circulation solidification according to claim 1, its feature exists
In, in step (2), external container pass to liquid nitrogen circulation, to reduce the friction temperature of chip-steel ball, and machine often runs 1-2
Hour suspends 10-15 minute.
7. ball milling-undergauge reciprocating extrusion the method for discarded titanium chip circulation solidification according to claim 1, its feature exists
In in step (3), steel cylinder material is the stainless steel through annealing, and kollag is graphite paper or masking foil.
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| CN108746234A (en) * | 2018-06-27 | 2018-11-06 | 唐竹胜 | A kind of production method of tubing string shape component of machine |
| CN110093634A (en) * | 2018-01-28 | 2019-08-06 | 上海奇谋能源技术开发有限公司 | A kind of method of physical recovering method electrolytic zinc-coated steel sheet anode scrap |
| CN110605396A (en) * | 2019-09-19 | 2019-12-24 | 燕山大学 | In-situ extrusion and upsetting integrated forming method for metal powder after sintering with atmosphere protection and integrated hydraulic press thereof |
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| CN108637155B (en) * | 2018-05-09 | 2020-03-17 | 合肥工业大学 | Bolt production mold, production method and manufactured bolt |
| CN108746234A (en) * | 2018-06-27 | 2018-11-06 | 唐竹胜 | A kind of production method of tubing string shape component of machine |
| CN110605396A (en) * | 2019-09-19 | 2019-12-24 | 燕山大学 | In-situ extrusion and upsetting integrated forming method for metal powder after sintering with atmosphere protection and integrated hydraulic press thereof |
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