CN107488802A - The manufacture method of the purposes of Ti (C, N) based ceramic metal, bend glass hot bending die and bend glass - Google Patents
The manufacture method of the purposes of Ti (C, N) based ceramic metal, bend glass hot bending die and bend glass Download PDFInfo
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- CN107488802A CN107488802A CN201710648074.XA CN201710648074A CN107488802A CN 107488802 A CN107488802 A CN 107488802A CN 201710648074 A CN201710648074 A CN 201710648074A CN 107488802 A CN107488802 A CN 107488802A
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- based ceramic
- bending die
- hot bending
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- 239000011521 glass Substances 0.000 title claims abstract description 134
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 72
- 239000002184 metal Substances 0.000 title claims abstract description 72
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 64
- 238000013003 hot bending Methods 0.000 title claims abstract description 61
- 239000000919 ceramic Substances 0.000 title claims abstract description 60
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 59
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 41
- 238000000034 method Methods 0.000 title claims abstract description 29
- 239000000463 material Substances 0.000 claims abstract description 16
- 239000000470 constituent Substances 0.000 claims abstract description 15
- 150000002739 metals Chemical class 0.000 claims abstract description 7
- 239000011248 coating agent Substances 0.000 claims abstract description 3
- 238000000576 coating method Methods 0.000 claims abstract description 3
- 239000000843 powder Substances 0.000 claims description 22
- 238000005245 sintering Methods 0.000 claims description 21
- 239000000203 mixture Substances 0.000 claims description 19
- 238000007781 pre-processing Methods 0.000 claims description 16
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 14
- 229910052723 transition metal Inorganic materials 0.000 claims description 11
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 10
- 238000009760 electrical discharge machining Methods 0.000 claims description 9
- 238000003801 milling Methods 0.000 claims description 9
- -1 transition metal carbides Chemical class 0.000 claims description 9
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 8
- 229910052804 chromium Inorganic materials 0.000 claims description 7
- 239000007789 gas Substances 0.000 claims description 7
- 238000002791 soaking Methods 0.000 claims description 7
- 229910003178 Mo2C Inorganic materials 0.000 claims description 5
- 239000002994 raw material Substances 0.000 claims description 5
- 229910052786 argon Inorganic materials 0.000 claims description 4
- 230000007704 transition Effects 0.000 claims description 2
- 238000000465 moulding Methods 0.000 claims 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 10
- 229910002804 graphite Inorganic materials 0.000 abstract description 10
- 239000010439 graphite Substances 0.000 abstract description 10
- 230000001590 oxidative effect Effects 0.000 abstract description 4
- 238000001816 cooling Methods 0.000 description 11
- 230000001681 protective effect Effects 0.000 description 10
- 239000012071 phase Substances 0.000 description 9
- 230000003647 oxidation Effects 0.000 description 7
- 238000007254 oxidation reaction Methods 0.000 description 7
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 229910052759 nickel Inorganic materials 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 238000000498 ball milling Methods 0.000 description 3
- 238000003754 machining Methods 0.000 description 3
- 230000035939 shock Effects 0.000 description 3
- 238000002679 ablation Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 230000003026 anti-oxygenic effect Effects 0.000 description 2
- 239000011195 cermet Substances 0.000 description 2
- 238000000280 densification Methods 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 239000007791 liquid phase Substances 0.000 description 2
- 239000011268 mixed slurry Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 239000010953 base metal Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000005469 granulation Methods 0.000 description 1
- 230000003179 granulation Effects 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 230000008450 motivation Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 229910003470 tongbaite Inorganic materials 0.000 description 1
- 238000001238 wet grinding Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C29/00—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides
- C22C29/02—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides
- C22C29/04—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbonitrides
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B23/00—Re-forming shaped glass
- C03B23/02—Re-forming glass sheets
- C03B23/023—Re-forming glass sheets by bending
- C03B23/03—Re-forming glass sheets by bending by press-bending between shaping moulds
-
- 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
- C22C1/04—Making non-ferrous alloys by powder metallurgy
- C22C1/05—Mixtures of metal powder with non-metallic powder
- C22C1/051—Making hard metals based on borides, carbides, nitrides, oxides or silicides; Preparation of the powder mixture used as the starting material therefor
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C29/00—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides
- C22C29/005—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides comprising a particular metallic binder
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Powder Metallurgy (AREA)
- Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
Abstract
The invention discloses the manufacture method of a kind of purposes of Ti (C, N) based ceramic metal, bend glass hot bending die and bend glass, to solve the problems, such as in the prior art using bend glass hot bending die made of graphite intolerant to oxidative attack.The purposes is specially purposes of Ti (C, the N) based ceramic metals as the coating material of the constituent material of bend glass hot bending die, the constituent material of bend glass hot bending die forming surface or bend glass hot bending die forming surface.The bend glass hot bending die is a kind of combination for being used to suppress glass blank under the softening temperature of glass blank the part or part that thus make glass blank be shaped to bend glass according to mould surface, the mould is by Ti (C, N) based ceramic metal is formed or the forming surface of the mould is by Ti (C, N) based ceramic metal is formed or the mould surface has Ti (C, N) based ceramic metal face coat.
Description
Technical field
The present invention relates to Ti (C, N) based ceramic metals and bend glass hot bending technical field, in particular to
The manufacture method of the purposes of Ti (C, N) based ceramic metal, bend glass hot bending die and bend glass.
Background technology
Ti (C, N) based ceramic metal is that one kind is mainly hard phase, using iron group metals such as Co, Ni, Mo to be viscous with Ti (C, N)
Phase is connect, and is usually added with WC, TaC, NbC, Mo2C、VC、Cr3C2The composite wood of hardening constituent is formed Deng transition metal carbides
Material.Ti (C, N) based ceramic metal has excellent high temperature resistant, anti-wear performance and good toughness and intensity, main at present to make
It is applied to field of machining for cutter material.In addition, also there is article to mention：Ti (C, N) based ceramic metal is alternatively arranged as：Hair
The high-temperature component of motivation, such as small bearing shell, blade root flange, valve, valve seat, push rod, rocking arm, camshaft, hot nozzle and
Piston ring etc.；And the sealing machine in petrochemical industry, such as sealing ring, valve.
On the other hand, with the continuous upgrading of the electronic products such as mobile phone, tablet personal computer, the screen of this electronic product is
Start largely to use bend glass (such as 2.5D glass screens, 3D glass screens).Bend glass is typically by being arranged in hot-bending machine
Bend glass hot bending die manufactures, and the basic step of manufacture method is：First, mould is assembled into compacting readiness, this
When, glass blank is housed in mould；Then, the mould for suppressing readiness is heated, so that glass contained in mould
Glass blank softens；Hereafter, the glass blank after softening is suppressed by mould, glass blank is shaped to bend glass；
Finally, mould is cooled down, bend glass product is removed from the molds after cooling.
Above-mentioned manufacture method proposes high requirement for the material of bend glass hot bending die.In general, curved surface glass
The material of glass hot bending die need to meet following condition：One, enough intensity is kept under glass blank softening point temperature, is not occurred
High temperature deformation or creep；2nd, under a certain pressure with maintaining interface inertia under the glass blank of softening, not infiltrating mutually；Three, have
Good thermal conductance and thermal shock resistance, quick heating and cooling can be repeated；4th, it is milled and is polished with good
Performance, so that the bend glass of manufacture meets that electronic product will to the harshness of bend glass surface smoothness, dimensional accuracy etc.
Ask；Five, the similar thermal expansion coefficient with glass, in order to avoid heating when due to thermal coefficient of expansion difference cause glass occur explosion or
Fold.
Bend glass hot bending die disclosure satisfy that above-mentioned condition made of currently used graphite.But due to graphite
Intolerant to oxidative attack, need mould being placed under protective atmosphere (such as nitrogen, argon gas) in the manufacturing process of bend glass, to subtract
Few air causes mould ablation with contacting dies.The manufacturing cost of bend glass is not only a significant increase using protective atmosphere,
And there are still the phenomenon of mould gradual ablation under weak oxygen atmosphere.Therefore, the surface of mould needs discontinuity polishing to repair,
It is until final because oxidation causes graphite wafer interparticle bond strength to decline the integrity failure for intensity deficiency occur.According to being used
Graphite performance it is different, the access times of existing bend glass hot bending die are generally 1000-3000 times.
Ti (C, N) based ceramic metals are had not yet to see to apply on bend glass hot bending die.Meanwhile also have no someone
It is proposed, the possibility of Ti (C, N) based ceramic metal is applied on bend glass hot bending die.In addition, in general, it is also difficult to pre-
Survey the suitability that Ti (C, N) based ceramic metal is applied to bend glass hot bending die.
The content of the invention
It is a primary object of the present invention to provide purposes, the bend glass hot bending die of a kind of Ti (C, N) based ceramic metal
And the manufacture method of bend glass, to solve in the prior art, using bend glass hot bending die made of graphite, resistance to oxidation is not invaded
The problem of erosion.
To achieve these goals, according to an aspect of the invention, there is provided a kind of Ti (C, N) based ceramic metal conduct
The constituent material of bend glass hot bending die, the constituent material or bend glass hot bending die of bend glass hot bending die forming surface
The purposes of the coating material of forming surface.
Ti (C, the N) based ceramic metal typically can be by Ti (C, the N) hard phase, 6- of 10-90 parts by weight
45 parts of iron group metal bonding phase, and the transition metal carbides hardening constituent of 2-45 parts are formed.Wherein, the iron group gold
Category bonding mutually generally comprises the one or more in Fe, Co, Ni, Cr.
Further, Ti (C, the N) based ceramic metal is mainly by by weight：Ti (C, N) hard of 60-90 parts
Phase, the iron group metal bonding phase of 6-30 parts, and the transition metal carbides hardening constituent of 2-8 parts are formed.
Further, the iron group metal bonding mutually includes at least one of Co, Ni and Cr, Ti (C, the N) base
Cr content is calculated as 3-15 parts by weight in cermet.
Further, the transition metal carbides hardening constituent is selected from WC, Mo2C, the one or more in TaC, NbC.
To achieve these goals, according to another aspect of the present invention, there is provided a kind of bend glass hot bending die.Should
Mould is a kind of to be used to suppress glass blank under the softening temperature of glass blank and thus make glass blank according to mould
Forming surface is shaped to the combination of the part or part of bend glass, and the mould is made up of Ti (C, N) based ceramic metal or the mould
Forming surface by Ti (C, N) based ceramic metal form or the mould surface there is Ti (C, N) based ceramic metal face coat.
Further, Ti (C, the N) based ceramic metal is mainly by by weight：Ti (C, N) hard of 60-90 parts
Phase, the iron group metal bonding phase of 6-30 parts, and the transition metal carbides hardening constituent of 2-8 parts are formed.
Further, the iron group metal bonding mutually includes at least one of Co, Ni and Cr, Ti (C, the N) base
Cr content is calculated as 3-15 parts by weight in cermet.
Further, the carbide reinforced phase of the transition group is selected from WC, Mo2C, the one or more in TaC, NbC.
Further, the manufacture method of above-mentioned mould comprises the following steps：
1) mixture of powders is prepared
Mixture of powders is made in raw material including proportioning following by weight：
Ti (C, N) powder：60-90 parts
Iron group metal：6-30 parts
Transition metal carbides：2-8 parts；
2) suppress
Above-mentioned mixture of powders is made by pressed compact by pressure forming；
3) it is pre-sintered
Pressed compact is sintered, sintering end point temperature is 1000-1200 DEG C, and soaking time 1-3 hours, cold at this temperature
But pre-sintered base is obtained；
4) preprocessing
Milling Process is carried out to pre-sintered base by CNC milling machine and forms preprocessing base；
5) final temperature sinters
Preprocessing base is sintered, sintering end point temperature is 1400-1480 DEG C, and soaking time 1-3 is small at this temperature
When, cooling obtains final temperature sintered blank；
6) finish
Electrical discharge machining is carried out to final temperature sintered blank by spark erosion equipment and obtains finishing workpiece；
7) polish
Finishing workpiece is polished, finally obtains manufacture finished product.
Further, the step 5) uses pressure sintering, and the gas medium of pressurization is nitrogen or argon gas, air pressure 3-
8MPa。
To achieve these goals, according to another aspect of the present invention, there is provided a kind of manufacture method of bend glass.
This method step includes：
I. above-mentioned mould is assembled into compacting readiness；
II. the mould for suppressing readiness is heated, so that glass blank softening contained in mould；
III. the glass blank after softening is suppressed by mould, glass blank is shaped to bend glass.
Further, in implementation steps II and step III, the mould is made to be in the working environment of weak protective atmosphere
Under, the weak protective atmosphere refers to the protective atmosphere of volumn concentration≤3% of oxygen.
According to another aspect of the present invention, a kind of manufacture method of Ti (C, N) based ceramic metal part is additionally provided.Should
Method comprises the following steps：
1) mixture of powders is prepared；
2) above-mentioned mixture of powders is made by pressed compact by pressure forming；
3) pre-sintering is carried out to pressed compact, pre-sintered outlet temperature is the first temperature, and cooling obtains pre-sintered base；
4) preprocessing is carried out to pre-sintered base and forms preprocessing base；
5) final temperature sintering is carried out to preprocessing base, final temperature sintering end point temperature is second temperature, and cooling obtains final temperature sintering
Base；
6) finishing processing is carried out to final temperature sintered blank and obtains finishing workpiece；
Wherein, first temperature is less than second temperature.
In addition, according to another aspect of the present invention, there is provided a kind of manufacture method of bend glass hot bending die.The party
Method comprises the following steps：
1) mixture of powders is prepared
Mixture of powders is made in raw material including proportioning following by weight：
Ti (C, N) powder：60-90 parts
Iron group metal：6-30 parts
Transition metal carbides：2-8 parts；
2) suppress
Above-mentioned mixture of powders is made by pressed compact by pressure forming；
3) it is pre-sintered
Pressed compact is sintered, sintering end point temperature is 1000-1200 DEG C, and soaking time 1-3 hours, cold at this temperature
But pre-sintered base is obtained；
4) preprocessing
Milling Process is carried out to pre-sintered base by CNC milling machine and forms preprocessing base；
5) final temperature sinters
Preprocessing base is sintered, sintering end point temperature is 1400-1480 DEG C, and soaking time 1-3 is small at this temperature
When, cooling obtains final temperature sintered blank；
6) finish
Electrical discharge machining is carried out to final temperature sintered blank by spark erosion equipment and obtains finishing workpiece；
7) polish
Finishing workpiece is polished, finally obtains manufacture finished product.
Experiment shows that Ti (C, N) based ceramic metals are warm in bend glass as the constituent material of bend glass hot bending die
Very excellent performance is embodied in the use of bending mould：First, Ti (C, N) based ceramic metal are soft in 800 DEG C of glass blank
Intensity at a temperature of change point is much larger than graphite；Second, Ti (C, N) based ceramic metal keeps boundary at a temperature of mold work with glass
Face is stable, does not react or infiltrates, and bend glass is molded and can be stripped easily from mould after cooling；3rd, have good
Good thermal conductance and thermal shock resistance；The thermal coefficient of expansion and glass of the 4th, Ti (C, N) based ceramic metal are very close, hence it is evident that excellent
In graphite；5th, Ti (C, N) based ceramic metal embodies very excellent antioxygenic property at a temperature of mold work, can show
Writing improves the mold use life-span；6th, Ti (C, N) based ceramic metal hardness are high, wearability is splendid, thus be not easy to be scraped off or
Abrasion is produced, causes mould invalidation.In view of the above-mentioned suitability of Ti (C, N) based ceramic metal, when bend glass hot bending die by
Ti (C, N) based ceramic metal is formed or the forming surface of bend glass hot bending die is made up of, again Ti (C, N) based ceramic metal
Or the face coat of bend glass hot bending die forming surface can be effectively improved when being made up of Ti (C, N) based ceramic metal
The problem of bend glass hot bending die is intolerant to oxidative attack.
In addition, after using above-mentioned mould manufacturing method, Ti (C, N) based ceramic metal high rigidity and high intensity institute can be overcome
The processing inconvenience problem that may be brought, and the bend glass hot bending die of this method manufacture can reach very high dimensional accuracy with
And the finish of forming surface.
The manufacture method of above-mentioned bend glass, as a result of the bend glass hot bending die of the present invention, therefore in reality
The problem of mould is intolerant to oxidative attack can be effectively improved when applying step II and step III；Because mould resistance to oxidation corrodes, can lead to
Cross and make the mould be under weak protective atmosphere or the working environment of unprotect atmosphere so as to reduce the manufacturing cost of bend glass.
With reference to embodiment, the present invention is described further.The additional aspect of the present invention and advantage will be
Give out in the middle part of following description, partly will become apparent from the description below, or recognized by the practice of the present invention.
Embodiment
Clear, complete explanation is carried out to the present invention below.Those of ordinary skill in the art are in the feelings illustrated based on these
The present invention can be realized under condition.Of particular note is that：
Technical scheme and technical characteristic in the present invention provided in each several part including the description below, do not rushing
In the case of prominent, these technical schemes and technical characteristic can be mutually combined.
In addition, the embodiments of the invention being related in the description below are generally only the embodiment of a branch of the invention, and
The embodiment being not all of.Therefore, creativeness is not being made based on the embodiment in the present invention, those of ordinary skill in the art
The every other embodiment obtained on the premise of work, should all belong to the scope of protection of the invention.
On term in the present invention and unit.Term in description and claims of this specification and relevant part
" mainly by ... form ", " comprising ", " being selected from " and their any deformation, it is intended that cover non-exclusive include.
【The manufacture of bend glass】
The manufacture method of bend glass, step include：
I. bend glass hot bending die is assembled into compacting readiness；
II. the mould for suppressing readiness is heated, so that glass blank softening contained in mould；
III. the glass blank after softening is suppressed by mould, glass blank is shaped to bend glass；
IV. mould is cooled down, bend glass product is removed from the molds after cooling.
Bend glass hot bending die under compacting readiness is typically made up of upper die and lower die；Wherein, lower mould is provided with
Upwardly opening curved surface forming chamber, upper mould are provided with the forming convax mould protruded down, gob are gripped between upper mould and lower mould
Part.
Heating, compacting and the cooling of mould are then carried out on hot-bending machine.And hot-bending machine is in bend glass manufacturing field
Existing equipment.After mould is heated and softens glass blank contained therein, hot-bending machine can drive mould and lower mould towards conjunction
Mould direction is moved, and thus the glass blank after softening is suppressed, glass blank is shaped to bend glass.
In addition, during heating, compacting in mould etc., mould can be also placed under protective atmosphere, even be shut out with reducing
Exhausted air and contacting dies, so as to play a part of effectively avoiding mould from being oxidized erosion at high temperature.But it is bent so to do increase
The manufacturing cost of surface glass.
【Bend glass hot bending die】
In one group of embodiment of the present invention, the upper die and lower die of bend glass hot bending die are by Ti (C, N) Base Metal
Ceramics are formed.In this group of embodiment, the step of manufacture method of each upper die and lower die includes, is as follows：
1) mixture of powders is prepared
According to required obtained Ti (C, N) based ceramic metal, raw material is configured to mixture of powders；
2) suppress
Above-mentioned mixture of powders is made by pressed compact by pressure forming；
3) it is pre-sintered
Pre-sintering is carried out to pressed compact, pre-sintered outlet temperature is the first temperature, and cooling obtains pre-sintered base；
4) preprocessing
Milling Process is carried out to pre-sintered base by CNC milling machine and forms preprocessing base；
5) final temperature sinters
Final temperature sintering is carried out to preprocessing base, final temperature sintering end point temperature is the second temperature higher than the first temperature, is cooled down
Obtain final temperature sintered blank；
6) finish
Electrical discharge machining is carried out to final temperature sintered blank by spark erosion equipment and obtains finishing workpiece；
7) polish
Finishing workpiece is polished and finally obtains manufacture finished product.
Hardness, intensity very high Ti (C, N) based ceramic metal will be obtained after final temperature sintering, is not easy to carry out machining；
And it is by pressure forming that the globality of pressed compact made of mixture of powders and intensity is poor, also it is not easy to cut to add
Work.Therefore, what the above method was creative first carries out pre-sintering before final temperature sintering to pressed compact, pressed compact is changed into intensity between pressure
Pre-sintered base between base and final temperature sintered blank, the pre-sintered base have the performances such as the intensity of suitable machining, disclosure satisfy that
The requirement of preprocessing process, greatly facilitate the manufacture of mould.
The above method also by Milling Process, electrical discharge machining, polish these conventional manufacturing process organically incorporate Ti (C,
N) in the powder metallurgically manufacturing technique of based ceramic metal, it can be ensured that the accuracy of manufacture and surface requirements of mould, while also ensure
The manufacture efficiency of mould, well control the manufacturing cost of mould.
First temperature, the concrete numerical value of second temperature can be set according to selected Ti (C, N) based ceramic metals.Its
In, the first temperature is generally 1000-1200 DEG C, and second temperature is generally 1400-1480 DEG C.And in the first temperature, second temperature
Under soaking time be generally 1-3 hours.
Pressed in Ti (C, N) based ceramic metal powder metallurgically manufacturing technique that briquetting pressure in the step 2) can be routinely
The briquetting pressure of step processed is set, and is usually set to 100-300Mpa.
The step 5) preferably uses pressure sintering, and the gas medium of pressurization is nitrogen or argon gas, air pressure 3-8MPa.
Pressure sintering can suppress the volatilization of high-temperature liquid-phase component during sintering, while promote liquid phase to flow by additional air pressure, quickening
Grain, which is reset, promotes densification.3-8Mpa air pressure setting both ensure that densification effect, take into account equipment anti-pressure ability.
【Ti (C, N) based ceramic metal】
For Ti (C, N) based ceramic metal of above-described embodiment, its material composition and content (percentage by weight) such as the institute of table 1
Show.
Table 1
Embodiment 1-5 raw material is respectively put into ball mill and carries out ball milling, ratio of grinding media to material 8:1, rotating speed is 30 revs/min
Clock, Ball-milling Time are 70 hours, and using absolute ethyl alcohol as wet grinding media, uniform mixed slurry is obtained after the completion of ball milling.Then
Embodiment 1-5 mixed slurry is subjected to spraying granulation respectively, obtains the compound particle of dry good fluidity, so as to
Complete the preparation of embodiment 1-5 mixture of powders.
Embodiment 1-5 mixture of powders is made on corresponding by above-mentioned bend glass hot bending die manufacture method respectively
Mould and lower mould (upper die and lower die of each embodiment use same Ti (C, N) based ceramic metal).Specific process parameter is referring to table 2
It is shown.
Table 2
Embodiment 1-5 bend glass hot bending die is respectively obtained by above-mentioned bend glass hot bending die manufacture method
Upper die and lower die, the accuracy error of each upper die and lower die is in below 0.02mm.
【The performance of bend glass hot bending die】
Distinguish the performance (result ginseng is shown in Table 3) of testing example 1-5 bend glass hot bending die and according to above-mentioned
Bend glass manufacture method manufacture bend glass.
Table 3
According to table 3, with reference to the manufacture of bend glass, embodiment 1-5 bend glass hot bending die embodies following
Performance：
The bend glass hot bending die of first, Ti (C, N) based ceramic metal is under 800 DEG C of glass blank softening point temperature
Intensity be much larger than graphite jig；
The bend glass hot bending die of second, Ti (C, N) based ceramic metal keeps boundary at a temperature of mold work with glass
Face is stable, does not react or infiltrates, and bend glass is molded and can be stripped easily from mould after cooling；
The bend glass hot bending die of the 3rd, Ti (C, N) based ceramic metal has good thermal conductance and thermal shock resistance；
The thermal coefficient of expansion of the bend glass hot bending die of the 4th, Ti (C, N) based ceramic metal and the very close (glass of glass
The thermal coefficient of expansion of glass is generally 7-9 × 10-6k-1), hence it is evident that better than graphite jig；
The bend glass hot bending die of the 5th, Ti (C, N) based ceramic metal embodies very excellent at a temperature of mold work
(in table 3,1h mass changes are due to that mould is weightless caused by oxidation to different antioxygenic property in 800 DEG C of air, therefore, should
Item numerical value is lower, shows that high-temperature oxidation resistance is higher), the mold use life-span can be significantly improved；
The bend glass hot bending die hardness of the 6th, Ti (C, N) based ceramic metal is high, wearability is splendid, thus be not easy by
Scratch produces abrasion, causes mould invalidation.
In addition, from table 3 it is observed that the bend glass hot bending die high-temperature oxidation resistance of embodiment 2 and embodiment 3 is bright
It is aobvious more preferable compared with other embodiment, and reason is mainly determined by the composition of Ti (C, N) based ceramic metal.
3D mobile phone glass is manufactured using the hot-bending machine for the bend glass hot bending die for being provided with above-described embodiment, the curved surface
Glass hot-bending die can be used more than 6000 times in the case of not repaired halfway.
In addition, in view of Ti (C, N) based ceramic metals high-temperature oxidation resistance protrude, during 3D mobile phone glass is manufactured,
It can also make bend glass hot bending die be in weak protective atmosphere and (refer to the protective atmosphere of volumn concentration≤3% of oxygen, such as oxygen
The nitrogen of volumn concentration≤3%) working environment under, so as to reduce the dosage of protective atmosphere.
Claims (11)
- Constituent material of 1.Ti (C, the N) based ceramic metals as bend glass hot bending die, bend glass hot bending die forming surface Constituent material or bend glass hot bending die forming surface coating material purposes.
- 2. purposes as claimed in claim 1, it is characterised in that Ti (C, the N) based ceramic metal is mainly by by weight：Ti (C, N) hard phase of 60-90 parts,The iron group metal bonding phase of 6-30 parts, andThe transition metal carbides hardening constituent of 2-8 parts is formed.
- 3. purposes as claimed in claim 2, it is characterised in that：The iron group metal bonding mutually includes at least one in Co, Ni Kind and Cr, Cr content is calculated as 3-15 parts by weight in Ti (C, the N) based ceramic metal.
- 4. purposes as claimed in claim 2, it is characterised in that：The transition metal carbides hardening constituent is selected from WC, Mo2C、 One or more in TaC, NbC.
- 5. bend glass hot bending die is a kind of for being suppressed thus glass blank under the softening temperature of glass blank Glass blank is set to be shaped to the combination of the part or part of bend glass according to mould surface, it is characterised in that：The mould by Ti (C, N) based ceramic metal is formed or the forming surface of the mould is made up of Ti (C, N) based ceramic metal or the mould molding mask There is Ti (C, N) based ceramic metal face coat.
- 6. mould as claimed in claim 5, it is characterised in that Ti (C, the N) based ceramic metal is mainly by by weight：Ti (C, N) hard phase of 60-90 parts,The iron group metal bonding phase of 6-30 parts, andThe transition metal carbides hardening constituent of 2-8 parts is formed.
- 7. mould as claimed in claim 6, it is characterised in that：The iron group metal bonding mutually includes at least one in Co, Ni Kind and Cr, Cr content is calculated as 3-15 parts by weight in Ti (C, the N) based ceramic metal.
- 8. mould as claimed in claim 6, it is characterised in that：The carbide reinforced phase of transition group is selected from WC, Mo2C、TaC、 One or more in NbC.
- 9. mould as claimed in claim 5, it is characterised in that the manufacture method of the mould comprises the following steps：1) mixture of powders is preparedMixture of powders is made in raw material including proportioning following by weight：Ti (C, N) powder：60-90 partsIron group metal：6-30 partsTransition metal carbides：2-8 parts；2) suppressAbove-mentioned mixture of powders is made by pressed compact by pressure forming；3) it is pre-sinteredPressed compact is sintered, sintering end point temperature is 1000-1200 DEG C, at this temperature soaking time 1-3 hours, is cooled down To pre-sintered base；4) preprocessingMilling Process is carried out to pre-sintered base by CNC milling machine and forms preprocessing base；5) final temperature sintersPreprocessing base is sintered, sintering end point temperature is 1400-1480 DEG C, and soaking time 1-3 hours, cold at this temperature But final temperature sintered blank is obtained；6) finishElectrical discharge machining is carried out to final temperature sintered blank by spark erosion equipment and obtains finishing workpiece；7) polishFinishing workpiece is polished, finally obtains manufacture finished product.
- 10. mould as claimed in claim 9, it is characterised in that：The step 5) uses pressure sintering, the gas medium of pressurization For nitrogen or argon gas, air pressure 3-8MPa.
- 11. the manufacture method of bend glass, its step includes：I. mould described in any one claim in claim 5 to 10 is assembled into compacting readiness；II. the mould for suppressing readiness is heated, so that glass blank softening contained in mould；III. the glass blank after softening is suppressed by mould, glass blank is shaped to bend glass.
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| CN107488802B (en) * | 2017-04-28 | 2019-09-27 | 成都美奢锐新材料有限公司 | The purposes, the manufacturing method of bend glass hot bending die and bend glass of Ti (C, N) based ceramic metal |
| CN110468320A (en) * | 2019-08-06 | 2019-11-19 | 广东工业大学 | A kind of high rigidity and the cermet of high tenacity and its preparation method and application |
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| CN107488802B (en) * | 2017-04-28 | 2019-09-27 | 成都美奢锐新材料有限公司 | The purposes, the manufacturing method of bend glass hot bending die and bend glass of Ti (C, N) based ceramic metal |
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| CN108275869A (en) * | 2018-03-01 | 2018-07-13 | 广东欧珀移动通信有限公司 | Hot pressing die and its preparation method and application for bend glass |
| CN110468320A (en) * | 2019-08-06 | 2019-11-19 | 广东工业大学 | A kind of high rigidity and the cermet of high tenacity and its preparation method and application |
| CN111055092A (en) * | 2019-11-25 | 2020-04-24 | 贵派电器股份有限公司 | Machining method of smooth curved plate die and smooth curved plate die |
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