CN107488802B - The purposes, the manufacturing method of bend glass hot bending die and bend glass of Ti (C, N) based ceramic metal - Google Patents
The purposes, the manufacturing method of bend glass hot bending die and bend glass of Ti (C, N) based ceramic metal Download PDFInfo
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- CN107488802B CN107488802B CN201710648074.XA CN201710648074A CN107488802B CN 107488802 B CN107488802 B CN 107488802B CN 201710648074 A CN201710648074 A CN 201710648074A CN 107488802 B CN107488802 B CN 107488802B
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- 239000011521 glass Substances 0.000 title claims abstract description 135
- 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 65
- 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 42
- 239000000463 material Substances 0.000 claims abstract description 16
- 239000000470 constituent Substances 0.000 claims abstract description 15
- 239000011248 coating agent Substances 0.000 claims abstract description 3
- 238000000576 coating method Methods 0.000 claims abstract description 3
- 238000005245 sintering Methods 0.000 claims description 23
- 239000000843 powder Substances 0.000 claims description 22
- 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
- 238000001816 cooling Methods 0.000 claims description 14
- -1 Transition metal carbides Chemical class 0.000 claims description 11
- 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
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 8
- 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
- 230000015572 biosynthetic process Effects 0.000 claims description 4
- 230000007704 transition Effects 0.000 claims description 2
- 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
- 238000000034 method 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 6
- 238000007254 oxidation reaction Methods 0.000 description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 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
- 229910052804 chromium Inorganic materials 0.000 description 3
- 238000010438 heat treatment 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
- 230000008859 change Effects 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
- 238000005498 polishing Methods 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
- 239000002131 composite material Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 229960000935 dehydrated alcohol Drugs 0.000 description 1
- 230000000694 effects Effects 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
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- 229910052742 iron Inorganic materials 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
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- 239000002245 particle Substances 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
Abstract
The invention discloses a kind of purposes of Ti (C, N) based ceramic metal, the manufacturing method of 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 metal 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 for being suppressed glass blank the combination of the part or part that thus make glass blank be shaped to according to mould surface bend glass under the softening temperature of glass blank, the mold is by Ti (C, N) based ceramic metal is constituted or the forming surface of the mold is by Ti (C, N) based ceramic metal is constituted or the mould surface has Ti (C, N) based ceramic metal surface covering.
Description
Technical field
The present invention relates to Ti (C, N) based ceramic metal and bend glass hot bending shape technical field, in particular to
The purposes, the manufacturing method of bend glass hot bending die and bend glass of Ti (C, N) based ceramic metal.
Background technique
It is mainly hard phase with Ti (C, N) that Ti (C, N) based ceramic metal, which is a kind of, with iron group metals such as Co, Ni, Mo is viscous
Phase is connect, and is usually added with WC, TaC, NbC, Mo2C、VC、Cr3C2Equal transition metal carbides form the composite wood of hardening constituent
Material.Ti (C, N) based ceramic metal has excellent high temperature resistant, wear-resisting property and good toughness and intensity, main at present to make
It is applied to field of machining for cutter material.In addition, also having 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, rocker 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 computer, the screen of this electronic product is
Start largely to use bend glass (such as 2.5D glass screen, 3D glass screen).Bend glass generally passes through and is arranged in hot-bending machine
Bend glass hot bending die manufactures, the basic step of manufacturing method are as follows: firstly, mold is assembled into compacting readiness, this
When, glass blank is housed in mold；Then, the mold of compacting readiness is heated, to make glass contained in mold
The softening of glass blank；Hereafter, the glass blank after softening is suppressed by mold, glass blank is made to be shaped to bend glass；
Finally, cooling down to mold, bend glass product is removed from the molds after cooling.
Above-mentioned manufacturing 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 the following conditions: one, enough intensity is kept under glass blank softening point temperature, is not occurred
High temperature deformation or creep；Two, under a certain pressure with maintain interface inertia under the glass blank of softening, mutually do not infiltrate；Three, have
Quickly heating and cooling can be repeated in good thermal conductance and thermal shock resistance；Four, it is milled and is polished with good
Performance wants the harshness of bend glass surface smoothness, dimensional accuracy etc. so that the bend glass of manufacture be made to meet electronic product
It asks；Five, the similar thermal expansion coefficient with glass, in order to avoid when heated due to thermal expansion coefficient difference cause glass occur explosion or
Fold.
Bend glass hot bending die made of currently used graphite can satisfy above-mentioned condition.But due to graphite
Intolerant to oxidative attack, need to be placed in mold under protective atmosphere (such as nitrogen, argon gas) in the manufacturing process of bend glass, to subtract
Few air is contacted with mold leads to mold ablation.The manufacturing cost of bend glass is not only a significant increase using protective atmosphere,
And there are still molds under weak oxygen atmosphere the phenomenon that gradually ablation.Therefore, the surface of mold needs discontinuity polishing to repair,
Until final, because oxidation leads to graphite wafer interparticle bond strength, there is the insufficient integrity failure of intensity in decline.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 metal is had not yet to see to apply on bend glass hot bending die.Meanwhile also having no someone
It proposes, a possibility that applying Ti (C, N) based ceramic metal 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.
Summary of the invention
The main purpose of the present invention is to provide a kind of purposes of Ti (C, N) based ceramic metal, bend glass hot bending die
And the manufacturing 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 the goals above, according to an aspect of the invention, there is provided a kind of Ti (C, N) based ceramic metal conduct
The constituent material or bend glass hot bending die of the constituent material of bend glass hot bending die, bend glass hot bending die forming surface
The purposes of the coating material of forming surface.
Ti (C, the N) based ceramic metal generally can Ti (C, N) hard phase, 6- by 10-90 by weight parts
45 parts of iron group metal bonding phase and 2-45 parts of transition metal carbides hardening constituent are constituted.Wherein, the iron group gold
Belong to bonding and mutually generally comprises one or more of Fe, Co, Ni, Cr.
Further, Ti (C, the N) based ceramic metal is mainly by by weight: 60-90 parts Ti (C, N) hard
Phase, 6-30 parts of iron group metal bonding phase and 2-8 parts of transition metal carbides hardening constituent are constituted.
Further, the iron group metal bonding mutually includes at least one of Co, Ni and Cr, Ti (C, the N) base
The content of Cr is calculated as 3-15 parts by weight in cermet.
Further, the transition metal carbides hardening constituent is selected from WC, Mo2C, one or more of TaC, NbC.
To achieve the goals above, according to another aspect of the present invention, a kind of bend glass hot bending die is provided.It should
Mold is a kind of thus to make glass blank according to mold for being suppressed under the softening temperature of glass blank glass blank
Forming surface is shaped to the combination of the part or part of bend glass, which is made of Ti (C, N) based ceramic metal or the mold
Forming surface by Ti (C, N) based ceramic metal constitute or the mould surface have Ti (C, N) based ceramic metal surface covering.
Further, Ti (C, the N) based ceramic metal is mainly by by weight: 60-90 parts Ti (C, N) hard
Phase, 6-30 parts of iron group metal bonding phase and 2-8 parts of transition metal carbides hardening constituent are constituted.
Further, the iron group metal bonding mutually includes at least one of Co, Ni and Cr, Ti (C, the N) base
The content of Cr is calculated as 3-15 parts by weight in cermet.
Further, the carbide reinforced phase of the transition group is selected from WC, Mo2C, one or more of TaC, NbC.
Further, above-mentioned mold manufacturing method the following steps are included:
1) mixture of powders is prepared
To include that mixture of powders is made in the raw material matched following by weight:
Ti (C, N) powder: 60-90 parts
Iron group metal: 6-30 parts
Transition metal carbides: 2-8 parts；
2) it suppresses
Green compact is made in above-mentioned mixture of powders by pressure forming；
3) it is pre-sintered
Green compact is sintered, sintering end point temperature is 1000-1200 DEG C, soaking time 1-3 hours at this temperature, cold
But it obtains being pre-sintered base；
4) preprocessing
Milling Process formation preprocessing base is carried out to base is pre-sintered by CNC milling machine；
5) final temperature is sintered
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) it finishes
Electrical discharge machining is carried out to final temperature sintered blank by spark erosion equipment and obtains finishing workpiece；
7) it polishes
Finishing workpiece is polished, manufacture finished product is finally obtained.
Further, the step 5) uses pressure sintering, and the gas medium of pressurization is nitrogen or argon gas, air pressure 3-
8MPa。
To achieve the goals above, according to another aspect of the present invention, a kind of manufacturing method of bend glass is provided.
This method step includes:
I. above-mentioned mold is assembled into compacting readiness；
II. the mold of compacting readiness is heated, so that glass blank contained in mold be made to soften；
III. the glass blank after softening is suppressed by mold, glass blank is made to be shaped to bend glass.
Further, in implementation steps II and step III, the mold is enabled 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 manufacturing method of Ti (C, N) based ceramic metal part is additionally provided.It should
Method the following steps are included:
1) mixture of powders is prepared；
2) above-mentioned mixture of powders is made by green compact by pressure forming；
3) green compact is pre-sintered, pre-sintering outlet temperature is the first temperature, cooling to obtain being pre-sintered base；
4) preprocessing is carried out to pre-sintering base and forms preprocessing base；
5) final temperature sintering is carried out to preprocessing base, final temperature sintering end point temperature is second temperature, cooling to obtain final temperature sintering
Base；
6) finishing processing is carried out to final temperature sintered blank and obtains finishing workpiece；
Wherein, first temperature is lower than second temperature.
In addition, according to another aspect of the present invention, providing a kind of manufacturing method of bend glass hot bending die.The party
Method the following steps are included:
1) mixture of powders is prepared
To include that mixture of powders is made in the raw material matched following by weight:
Ti (C, N) powder: 60-90 parts
Iron group metal: 6-30 parts
Transition metal carbides: 2-8 parts；
2) it suppresses
Green compact is made in above-mentioned mixture of powders by pressure forming；
3) it is pre-sintered
Green compact is sintered, sintering end point temperature is 1000-1200 DEG C, soaking time 1-3 hours at this temperature, cold
But it obtains being pre-sintered base；
4) preprocessing
Milling Process formation preprocessing base is carried out to base is pre-sintered by CNC milling machine；
5) final temperature is sintered
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) it finishes
Electrical discharge machining is carried out to final temperature sintered blank by spark erosion equipment and obtains finishing workpiece；
7) it polishes
Finishing workpiece is polished, manufacture finished product is finally obtained.
Experiments have shown that Ti (C, N) based ceramic metal is 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 keep boundary with glass at a temperature of mold work
Face is stablized, and is not reacted or is infiltrated, and bend glass is formed and can be demoulded from mold easily after cooling；Third has good
Good thermal conductance and thermal shock resistance；The thermal expansion coefficient 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 embody very excellent antioxygenic property at a temperature of mold work, can show
Write the service life for improving mold；6th, Ti (C, N) based ceramic metal hardness is high, wearability is splendid, thus be not easy to be scraped off or
Abrasion is generated, mould invalidation is caused.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 constituted or the forming surface of bend glass hot bending die is made of, again Ti (C, N) based ceramic metal
Or the surface covering of bend glass hot bending die forming surface by Ti (C, N) based ceramic metal constitute when, can be effectively improved
The problem of bend glass hot bending die is intolerant to oxidative attack.
In addition, Ti (C, N) based ceramic metal high rigidity and high-intensitive institute can be overcome after using above-mentioned mould manufacturing method
The inconvenient problem of possible processing, 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 manufacturing method of above-mentioned bend glass, due to using bend glass hot bending die of the invention, in reality
The problem of mold is intolerant to oxidative attack can be effectively improved when applying step II and step III；Since mold resistance to oxidation corrodes, can lead to
It crosses and the mold is enabled to be under weak protective atmosphere or the working environment of unprotect atmosphere the manufacturing cost for reducing bend glass.
The present invention is described further With reference to embodiment.The additional aspect of the present invention and advantage will be
It gives out in the middle part of following description, partially will become apparent from the description below, or practice through the invention is recognized.
Specific 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 will be realized under condition.Of particular note is that:
The technical solution provided in each section including following the description and technical characteristic in the present invention are not rushing
In the case where prominent, these technical solutions and technical characteristic be can be combined with each other.
In addition, the embodiment of the present invention being related in following the description is generally only the embodiment of a branch of the invention, and
The embodiment being not all of.Therefore, based on the embodiments of the present invention, those of ordinary skill in the art are not making creativeness
Every other embodiment obtained, should fall within the scope of the present invention under the premise of labour.
About term in the present invention and unit.Term in description and claims of this specification and related part
" mainly by ... constitute ", " comprising ", " being selected from " and their any deformation, it is intended that cover and non-exclusive include.
[manufacture of bend glass]
The manufacturing method of bend glass, step include:
I. bend glass hot bending die is assembled into compacting readiness；
II. the mold of compacting readiness is heated, so that glass blank contained in mold be made to soften；
III. the glass blank after softening is suppressed by mold, glass blank is made to be shaped to bend glass；
IV. mold is cooled down, is removed from the molds bend glass product after cooling.
Bend glass hot bending die under compacting readiness is generally made of upper die and lower die；Wherein, lower die is equipped with
Upwardly opening curved surface forming chamber, upper mold are equipped with the forming convax mould protruded downward, glass billet are gripped between upper mold and lower die
Part.
Heating, compacting and the cooling of mold then carry out on hot-bending machine.And hot-bending machine is in bend glass manufacturing field
Existing equipment.After mold is heated and softens glass blank contained therein, hot-bending machine can drive upper mold and lower die towards conjunction
The movement of mould direction, thus suppresses the glass blank after softening, glass blank is made to be shaped to bend glass.
In addition, also mold can be placed under protective atmosphere durings the heating of mold, compacting etc., even shut out with reducing
Exhausted air is contacted with mold, to play the role of effectively mold being avoided to be oxidized erosion at high temperature.But it is bent to do so increase
The manufacturing cost of surface glass.
[bend glass hot bending die]
In one group of embodiment of the invention, the upper die and lower die of bend glass hot bending die are by Ti (C, N) Base Metal
Ceramics are constituted.In this group of embodiment, the steps included are as follows for the manufacturing method of each upper die and lower die:
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) it suppresses
Green compact is made in above-mentioned mixture of powders by pressure forming；
3) it is pre-sintered
Green compact is pre-sintered, pre-sintering outlet temperature is the first temperature, cooling to obtain being pre-sintered base；
4) preprocessing
Milling Process formation preprocessing base is carried out to base is pre-sintered by CNC milling machine；
5) final temperature is sintered
Final temperature sintering is carried out to preprocessing base, final temperature sintering end point temperature is the second temperature higher than the first temperature, cooling
Obtain final temperature sintered blank；
6) it finishes
Electrical discharge machining is carried out to final temperature sintered blank by spark erosion equipment and obtains finishing workpiece；
7) it polishes
Polishing is carried out to finishing workpiece 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 pressure forming that the globality of green compact made of mixture of powders and intensity is poor, it is also not easy to cut to add
Work.Therefore, the above method is creative is first pre-sintered green compact before final temperature sintering, and green compact is made to be changed into intensity between pressure
Pre-sintering base between base and final temperature sintered blank, it is suitable for the performances such as the intensity of machining which, which has, be can satisfy
The requirement of preprocessing process greatly facilitates the manufacture of mold.
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 mold, while also guaranteeing
The manufacture efficiency of mold, controls the manufacturing cost of mold well.
First temperature, the specific value of second temperature can be set according to selected Ti (C, N) based ceramic metal.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.
Briquetting pressure in the step 2) can press in Ti (C, N) based ceramic metal powder metallurgically manufacturing technique 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 inhibit the volatilization of high-temperature liquid-phase component when sintering, while promote liquid phase flowing, quickening by additional air pressure
Grain, which is reset, promotes densification.The air pressure setting of 3-8Mpa 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, material composition and content (weight percent) such as 1 institute of table
Show.
Table 1
The raw material of embodiment 1-5 is respectively put into ball mill and carries out ball milling, ratio of grinding media to material 8:1, revolving speed is 30 revs/min
Clock, Ball-milling Time is 70 hours, and using dehydrated alcohol as wet grinding media, uniform mixed slurry is obtained after the completion of ball milling.Then
The mixed slurry of embodiment 1-5 is subjected to spraying granulation respectively, obtains the mixture particle of dry good fluidity, thus
Complete the preparation of the mixture of powders of embodiment 1-5.
The mixture of powders of embodiment 1-5 is made on corresponding by above-mentioned bend glass hot bending die manufacturing method respectively
Mould and lower die (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
The bend glass hot bending die of embodiment 1-5 is respectively obtained by above-mentioned bend glass hot bending die manufacturing method
Upper die and lower die, the accuracy error of each upper die and lower die is in 0.02mm or less.
[performance of bend glass hot bending die]
Distinguish the performance (result ginseng is shown in Table 3) of the bend glass hot bending die of testing example 1-5 and according to above-mentioned
Bend glass manufacturing method manufacture bend glass.
Table 3
According to table 3, in conjunction with the manufacture of bend glass, the bend glass hot bending die of embodiment 1-5 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 with glass at a temperature of mold work
Face is stablized, and is not reacted or is infiltrated, and bend glass is formed and can be demoulded from mold easily after cooling；
The bend glass hot bending die of third, Ti (C, N) based ceramic metal has good thermal conductance and thermal shock resistance；
The thermal expansion coefficient and the very close (glass of glass of the bend glass hot bending die of the 4th, Ti (C, N) based ceramic metal
The thermal expansion coefficient of glass is generally 7-9 × 10-6k-1), hence it is evident that it is 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
Different antioxygenic property (in table 3,1h mass change is that the mold caused by aoxidizing is weightless in 800 DEG C of air, this
Item numerical value is lower, shows that high-temperature oxidation resistance is higher), the service life of mold 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
Abrasion is scratched or generated, mould invalidation is caused.
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 embodiments, and reason is mainly determined by the ingredient 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 6000 times or more in the case where not modifying halfway.
In addition, it is prominent in view of Ti (C, N) based ceramic metal high-temperature oxidation resistance, during manufacturing 3D mobile phone glass,
It can also enable 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, to reduce the dosage of protective atmosphere.
Claims (9)
- Constituent material of 1.Ti (C, the N) based ceramic metal 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；Ti (C, the N) based ceramic metal Mainly by by weight: 60-90 parts Ti (C, N) hard phase, 6-30 parts of iron group metal bonding phase and 2-8 parts Transition metal carbides hardening constituent is constituted.
- 2. purposes as described in claim 1, it is characterised in that: the iron group metal bonding mutually includes at least one in Co, Ni Kind and Cr, the content of Cr is calculated as 3-15 parts by weight in Ti (C, the N) based ceramic metal.
- 3. 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 of TaC, NbC.
- 4. bend glass hot bending die is a kind of for being suppressed thus under the softening temperature of glass blank glass blank So that glass blank is shaped to the combination of the part or part of bend glass according to mould surface, it is characterised in that: the mold by Ti (C, N) based ceramic metal is constituted or the forming surface of the mold is made of Ti (C, N) based ceramic metal or the mould surface has There is Ti (C, N) based ceramic metal surface covering；Ti (C, the N) based ceramic metal is mainly by by weight: 60-90 parts Ti (C, N) hard phase, 6-30 parts of iron group metal bonding phase and 2-8 parts of transition metal carbides hardening constituent are constituted.
- 5. mold as claimed in claim 4, it is characterised in that: the iron group metal bonding mutually includes at least one in Co, Ni Kind and Cr, the content of Cr is calculated as 3-15 parts by weight in Ti (C, the N) based ceramic metal.
- 6. mold as claimed in claim 4, it is characterised in that: the carbide reinforced phase of transition group is selected from WC, Mo2C、TaC、 One or more of NbC.
- 7. mold as claimed in claim 4, which is characterized in that the manufacturing method of the mold the following steps are included:1) mixture of powders is preparedTo include that mixture of powders is made in the raw material matched following by weight:Ti (C, N) powder: 60-90 partsIron group metal: 6-30 partsTransition metal carbides: 2-8 parts；2) it suppressesGreen compact is made in above-mentioned mixture of powders by pressure forming；3) it is pre-sinteredGreen compact is sintered, sintering end point temperature is 1000-1200 DEG C, soaking time 1-3 hours at this temperature, cooling To pre-sintering base；4) preprocessingMilling Process formation preprocessing base is carried out to base is pre-sintered by CNC milling machine；5) final temperature is sinteredPreprocessing base is sintered, sintering end point temperature is 1400-1480 DEG C, soaking time 1-3 hours at this temperature, cold But final temperature sintered blank is obtained；6) it finishesElectrical discharge machining is carried out to final temperature sintered blank by spark erosion equipment and obtains finishing workpiece；7) it polishesFinishing workpiece is polished, manufacture finished product is finally obtained.
- 8. mold as claimed in claim 7, 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.
- 9. the manufacturing method of bend glass, step include:I. mold described in any one of claim 4 to 8 claim is assembled into compacting readiness；II. the mold of compacting readiness is heated, so that glass blank contained in mold be made to soften；III. the glass blank after softening is suppressed by mold, glass blank is made to be shaped to bend glass.
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| CN108220734B (en) * | 2017-12-28 | 2020-10-16 | 成都美奢锐新材料有限公司 | Raw material powder for producing cermet and method for producing cermet |
| CN108277413A (en) * | 2018-02-28 | 2018-07-13 | 湖南天益高技术材料制造有限公司 | A kind of 3D glass heats bender high temperature resistant soaking plate and its manufacturing process |
| 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 |
| CN110468320B (en) * | 2019-08-06 | 2021-08-10 | 广东工业大学 | High-hardness and high-toughness metal ceramic and preparation method and application thereof |
| 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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