CN106345835A - Glass powder, glass mat, application of glass mat and method for metal vertical hot extrusion - Google Patents

Glass powder, glass mat, application of glass mat and method for metal vertical hot extrusion Download PDF

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Publication number
CN106345835A
CN106345835A CN201610785123.XA CN201610785123A CN106345835A CN 106345835 A CN106345835 A CN 106345835A CN 201610785123 A CN201610785123 A CN 201610785123A CN 106345835 A CN106345835 A CN 106345835A
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glass
glass dust
isolator
hot extrusion
blank
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段素杰
邹丰
罗洪春
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Beijing Tianlichuang Glass Technology Development Co ltd
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Beijing Tianlichuang Glass Technology Development Co ltd
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Priority to CN201610785123.XA priority Critical patent/CN106345835A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C23/00—Extruding metal; Impact extrusion
    • B21C23/32—Lubrication of metal being extruded or of dies, or the like, e.g. physical state of lubricant, location where lubricant is applied
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C23/00—Extruding metal; Impact extrusion
    • B21C23/02—Making uncoated products
    • B21C23/04—Making uncoated products by direct extrusion
    • B21C23/08—Making wire, bars, tubes
    • B21C23/085—Making tubes
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C12/00—Powdered glass; Bead compositions

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Glass Compositions (AREA)

Abstract

The invention provides glass powder, a glass mat, application of the glass mat and a method for metal vertical hot extrusion. The glass powder comprises the components in percentage by weight: 50%-62% of SiO2, 2%-8% of Al2O3, 0.1%-13% of CaO, 0.1%-10% of MgO, 0.1%-10% of K2O, 0.1%-30% of Na2O, 0-12% of B2O3, 0-7% of F and 0-2% of impurities. The components of the abovementioned glass powder have specific dosage relations and fundamentally change the glass performance. The glass mat manufactured by using the glass powder has relatively low softening point and high-temperature viscosity, can match the temperature system of a vertical extruder, has good lubrication effects on hot metals in the metal vertical hot extrusion process, can effectively reduce minor defects such as surface scratches and pits of a product, avoids major defects such as tearing and folding, prolongs the life of a mold and comprehensively improves the equipment utilization rate and the economic benefits.

Description

Glass dust, the method for glass isolator, the application of glass isolator and metallic vertical hot extrusion
Technical field
The present invention relates to metal Hot-extrusion field, in particular to a kind of glass dust, glass isolator, glass isolator Application and the method for metallic vertical hot extrusion.
Background technology
Metal hot extrusion is by METAL HEATING PROCESS to uniform temperature (different metal heating-up temperature is different), using metal thermoforming Extruder is from the metal fever contour machining procedure of mould port extruded product.Product is based on tubing it is also possible to extrudate.From Divide on design form, metal fever shaping extruder has two kinds: horizontal extruder and vertical extruder, they are respectively adopted horizontal heat Extrusion process and vertical hot extrusion technique are produced.During metal hot extrusion, need to use glass lubricant.Main If using glass in the characteristic of elevated temperature melts, being coated or be placed on the deformation face of thermometal in advance, quite big Extruding force in face of, metal starts deformation, and glass lubricant melts film forming, and be stretched extension with the flowing of metal, all the time Play lubrication.The effect of glass lubricant is main to be exactly to prevent surface defect, generally comprises: cut, load mould, tears Split, fold.Disadvantages described above is more, more serious, illustrates that surface quality is poorer, lubricant effect is more bad.
During an extrusion process, glass lubricant is not only a kind of, but a combination, there are two to three kinds. Apply by different way in different process time point, act on the different parts of blank, finally play the action effect of lubrication.Carefully For cause, glass lubricant is divided into outer dusting, interior dusting (article section is dusting in the just needs of annular) and glass isolator.Outer painting Powder, is applied to blank outer surface, for lubricating blank outer surface recipient；Interior dusting, is applied to blank inner surface, for lubricating Blank inner surface and plug；Glass isolator, is made up of glass dust using front, is applied between blank front end and extrusion die, is used for The unsalted surface of lubricating extrusion and extruding die orifice.
In existing metal hot extrusion technique, the capacity of equipment upper limit of the horizontal extruder of employing is usually no more than 10,000 tons, Domestic operation have more than ten, the outfit comparative maturity of glass lubricant, lubrication is good, the few surface defects of extruded product.And The extruder more than 10,000 tons for the capacity of equipment upper limit belongs to large-size extruder, and what domestic construction completed has 4, is all vertical extrusion Machine.The glass lubricant that domestic vertical extruder uses at present, all comes from horizontal extruder transplanting, and coupling is simultaneously bad, Protection lubricant effect can only meet basic technology requirement.Scene feedback shows in a large number, existing glass lubricant, particularly glass Pad is implicitly present in inferior position in the production technology application aspect of vertical extruder.Poor lubrication, can not squeeze, extrude difficult, the tool and mould longevity Life is short, equipment failure rate is high, products surface quality is poor, cut is many, load mould is deep, or even serious tear is also ordinary visible.
In a word, existing glass lubricant, particularly glass isolator can be good at meeting horizontal extruder production technology will Ask, but no matter from structure design, workflow, process system or fashion of extrusion, two kinds of extruders all exist quite big Difference, simple transplantation and graft cannot adapt to different process environments, same glass lubricant, particularly glass isolator, Ample scope for abilities is just lost on vertical extruder.
For these reasons it is necessary to provide a kind of being applied to large-scale vertical extruder, for making metallic vertical heat The glass dust of extruding glass isolator.
Content of the invention
The present invention is intended to provide a kind of glass dust, existed in metallic vertical hot extrusion with solving glass isolator in prior art The bad problem of greasy property.
To achieve these goals, according to an aspect of the invention, it is provided a kind of glass dust, by weight percentage Meter, this glass dust includes: 50%～62% sio2, 2%～8% al2o3, 0.1%～13% cao, 0.1%～10% Mgo, 0.1%～10% k2O, 0.1%～30% na2O, 0～12% b2o3, 0～7% f and 0～2% miscellaneous Matter.
Further, by weight percentage, glass dust includes: 55%～62% sio2, 2%～5% al2o3、 6%～13% cao, 2%～5% mgo, 6%～8% k2O, 10%～25% na2O, 0～7% b2o3, 0～ 7% f and 0～2% impurity.
Further, sio2And al2o3Weight than for 20～27:1.
Further, sio2And na2The weight of o is than for 2.2～3:1.
Further, the particle diameter of glass dust is less than 5 mesh.
According to a further aspect in the invention, additionally provide a kind of glass isolator, it is using waterglass and above-mentioned glass dust It is prepared from for raw material.
Further, waterglass accounts for the 1～30% of glass dust weight.
Further, the method forming glass isolator includes: glass dust is mixed with waterglass, obtains mixture；To mix Thing carries out suppressing, solidifies, and obtains glass isolator.
According to a further aspect in the invention, additionally provide a kind of application in metallic vertical hot extrusion process for glass isolator.
According to a further aspect in the invention, additionally provide a kind of method of metallic vertical hot extrusion, it comprises the following steps: Metal stock is heated, obtains heating material；Above-mentioned glass isolator is placed between heating material and mould, vertical extruding, Obtain pressing material；And pressing material carried out anneal, sandblasting and polishing, obtain final metal product.
The above-mentioned glass dust that the present invention provides, each group has between dividing specifically uses magnitude relation, is fundamentally changing glass Glass performance.The glass isolator being made using it, softening point and high temperature viscosity are all relatively low, can mate the temperature system of vertical extruder Degree, has extraordinary lubricant effect thus for the thermometal in metallic vertical hot extrusion process, can effectively reduce product The little defect such as surface scratch load mould, prevents the big defect such as tear, fold, extends die life simultaneously, comprehensive raising equipment Utilization rate.In a word, the glass isolator being made using the glass dust that the present invention provides, is more suitable as in metallic vertical hot extrusion technique A part for glass lubricant uses.
Brief description
The Figure of description constituting the part of the application is used for providing a further understanding of the present invention, and the present invention shows Meaning property embodiment and its illustrate for explaining the present invention, does not constitute inappropriate limitation of the present invention.In the accompanying drawings:
Photograph when metallic article is freshly extruded in the metallic vertical hot extrusion process that Fig. 1 shows in the embodiment of the present invention 19 Piece；
After the annealed sandblasting of metallic article in the metallic vertical hot extrusion process that Fig. 2 shows in the embodiment of the present invention 19 Photo；
Photo when metallic article is freshly extruded in the metallic vertical hot extrusion process that Fig. 3 shows in comparative example 3；
Photo after the annealed sandblasting of metallic article in the metallic vertical hot extrusion process that Fig. 4 shows in comparative example 3.
Specific embodiment
It should be noted that in the case of not conflicting, the embodiment in the application and the feature in embodiment can phases Mutually combine.To describe the present invention below with reference to the accompanying drawings and in conjunction with the embodiments in detail.
As background section is introduced, it is poor to there is greasy property in existing glass isolator in metallic vertical hot extrusion Problem.In order to solve this problem, the invention provides a kind of glass dust, by weight percentage, glass dust includes: 50% ～62% sio2, 2%～8% al2o3, 0.1%～13% cao, 0.1%～10% mgo, 0.1%～10% k2O, 0.1%～30% na2O, 0～12% b2o3, 0～7% f and 0～2% impurity.
Why traditional glass isolator can not try out vertical extrusion completely, be primarily due to temperature schedule difference too big.With As a example stainless steel pipe extruding, the temperature before blank enters compression stage is generally kept in 1180 DEG C～1200 DEG C, if it find that Temperature is low can also to mend temperature using heating in medium frequency.So horizontal type extruding ensure that blank is entered with higher and suitable temperature Compression stage.The restriction being required due to quality structure, the heating-up temperature of vertical extrusion blank is high unlike horizontal type extruding how many, but its Individual huge, transfer time is very long, and temperature drop is serious and cannot quickly mend warm (currently without so big induction heating equipment of medium frequency), squeezes Before pressure, Preform surface temperature is substantially not over 1050 DEG C.If now using traditional glass lubricant, at all cannot be fine Melting, liquid phase occurs few, also just out of the question lubricates good.
And the above-mentioned glass dust that the present invention provides, each group has between dividing specifically uses magnitude relation, is fundamentally changing Glass propertiess.The glass isolator being made using it, softening point and high temperature viscosity are all relatively low, can mate the temperature system of vertical extruder Degree, has extraordinary lubricant effect thus for the thermometal in metallic vertical hot extrusion process, can effectively reduce product The little defect such as surface scratch, load mould, prevents the big defect such as tear, fold, extends die life simultaneously, comprehensive raising equipment Utilization rate.In a word, the glass isolator being made using the glass dust that the present invention provides, is more suitable as in metallic vertical hot extrusion technique A part for glass lubricant uses.
Especially, because the blank of vertical extruding is generally huge, single is worth basic more than 100,000, and special material is even more Height, more than million is also not rarely seen.So as the technique auxiliary material of most critical, the glass isolator glass dust that the present invention provides shows Good lubrication effect, the raising for economic benefit aspect also has sizable help.
In a preferred embodiment, by weight percentage, glass dust includes: 55%～62% sio2, 2% ～5% al2o3, 6%～13% cao, 2%～5% mgo, 6%～8% k2O, 10%～25% na2O, 0～ 7% b2o3, 0～7% f and 0～2% impurity.The consumption of each component is controlled within the above range, can drop further Low softening point and high temperature viscosity.When glass isolator is used for metallic vertical hot extrusion, its lubricant effect is more preferably.
In a preferred embodiment, sio in above-mentioned glass dust2And al2o3Weight than for 20～27:1.More excellent Selection of land, sio2And na2The weight of o is than for 2.2～3:1.Control sio2、al2o3、na2Proportionate relationship between o, can make glass Pad possesses more excellent lubricity.It is further preferred that weight percentage, glass dust includes 57% sio2, 2.5% Al2o3, 7% cao, 2% mgo, 6% k2O, 2% na2O, 5% b2o3And 0.5% f.
Due to wholly or in part using raw mineral materials, considerable amount of impurity will necessarily be brought in glass dust.Above-mentioned glass In glass powder component, impurity may include fe2o3、feo、tio2、zno、mno2、so3、cr3o2Deng, its percentage by weight resultant be 0～ 2%.
The each component of glass dust of the present invention can obtain from suitable raw material, and such as quartz sand (mainly provides sio2), leaf Cured stone (mainly provides al2o3), Kaolin (mainly provide al2o3), limestone (mainly provide cao), calcite (main provide Cao), wollastonite (mainly provides cao, sio2), Anhydrite (mainly provide al2o3、na2O and k2O), dolomite (mainly provide cao, Mgo), potassium carbonate (mainly provides k2O), soda (mainly provides na2O), borax pentahydrate (mainly provides b2o3), fluorite (mainly carries For f), brium carbonate (mainly provide bao), borax anhydrouss (mainly provide b2o3), borax decahydrate (mainly provide b2o3), boric acid (main B to be provided2o3), prodan (mainly provide na2O, f and sio2), calcium fluoride (main provide cao and sio2) etc..
The consideration of the aspects such as integrated cost, simplification configuration technique, it is preferred to use quartz sand is as sio2Supply source, pyrophillite is made For al2o3Supply source, limestone as cao supply source, dolomite as mgo supply source, potassium carbonate as k2O supply source, soda are as na2o Supply source, borax pentahydrate are as b2o3Supply source, fluorite are as f supply source, brium carbonate as bao supply source.
In practical operation, only need to mix after the supply source of each component being weighed by material side, found at high temperature, after discharging Broken processing can get glass dust finished product.Preferably, in mixed process, the uniformity reaches 97%, and temperature during high temperature melting is 1000 DEG C～1600 DEG C.Preferably, in crushing processing process, the particle diameter of glass dust is crushed to less than 5 mesh.
In addition, according to a further aspect in the invention, additionally provide a kind of glass isolator, it is using waterglass and above-mentioned glass Glass powder is prepared from for raw material.
This glass isolator is made using above-mentioned glass dust, and it has relatively low softening point and high temperature viscosity, can mate vertical The temperature schedule of extruder, has extraordinary lubrication effect thus for the thermometal deformation in metallic vertical hot extrusion process Really, can effectively reduce the little defect such as product surface cut, load mould, prevent the big defect such as tear, fold, extend mould makes simultaneously With life-span, comprehensive raising utilization rate of equipment and installations.
Specific glass isolator processing technology can adopt the common process of this area.In a preferred embodiment, In the step of above-mentioned mixing, waterglass accounts for the 1%～30% of glass dust weight.It is highly preferred that it is prepared from by following steps: Above-mentioned glass dust is mixed with waterglass, obtains mixture；Mixture is carried out suppressing, solidifies, obtains glass isolator.
In addition, present invention also offers application in metallic vertical hot extrusion process for the above-mentioned glass isolator.This glass isolator because Its relatively low softening point and high temperature viscosity, can be to the unsalted surface of thermometal and extrusion die in metallic vertical hot extrusion process Mouth is more effectively lubricated.There is not fold, tear such big defect through vertically extruding the product surface obtaining, and draw The little defect such as trace, load mould is also little.The product quality of metallic vertical hot extrusion can be effectively improved.
Further, present invention also offers a kind of method of metallic vertical hot extrusion, it comprises the following steps: to metal Blank is heated, and obtains heating material；Above-mentioned glass isolator is placed between heating material and mould, vertical extruding, is squeezed Binder；And pressing material carried out anneal, sandblasting and polishing, obtain final metal product.
As it was noted above, using the above-mentioned glass isolator of the present invention, metallic vertical hot extrusion can be played with good lubrication Effect.In a word, the metal product that above-mentioned pressing method obtains, surface defect is few.
In actual mechanical process, those skilled in the art can be grasped according to existing metallic vertical hot extrusion technique Make, such as in extrusion process, carry out tube extrusion using outer painting part and interior dusting.Only need to be selected this when placing glass isolator Bright above-mentioned glass isolator, you can be effectively improved the effect of vertical hot extrusion.Preferably, step metal stock being heated In, heating-up temperature is 900 DEG C～1400 DEG C.
Illustrate below taking tube extrusion as a example reality metallic vertical hot extrusion technique process:
1) to make glass isolator standby for glass dust.
2) the solid blank of band large-scale metal puts into heating furnace, high-temperature heating (900 DEG C～1400 DEG C), and (2 is little for held for some time When 24 hours).
3) blank is transferred to de-scaling station, removes surface scale completely.
4) blank is transferred to glass dust coating station, in a kind of glass dust of its surface-coated, entitled outer dusting.Now The effect of outer dusting is lubrication blank outer surface and punching recipient inwall.Sometimes also can omit this step, not apply outer dusting.
5) blank is transferred to punching station, blank is vertical to enter punching recipient, and end face applies a kind of glass thereon Powder, entitled interior dusting.After punching, solid blank becomes hollow.
6) hollow blank is transferred to heating furnace, high-temperature heating (900 DEG C～1400 DEG C), and (1～12 is little to mend warm certain time When).
7) hollow blank is transferred to de-scaling station, removes the oxide skin of surfaces externally and internally.
8) blank is transferred to glass dust coating station, outer surface applies outer dusting, dusting in inner surface applying.It is usually Apply simultaneously.The now effect of outer dusting is lubrication blank outer surface and recipient inwall, and the effect of interior dusting is lubrication blank Inner surface and squeezing needle.
9) it is transferred to extrusion position, blank vertical entrance recipient.Glass isolator is placed on blank upper surface, squeezing needle is worn Cross the mould of blank, glass isolator and top.Start to extrude, hollow metal blank becomes pipe by die orifice.Now glass isolator Effect is the newly-generated outer surface of lubrication blank and die orifice.
10) pipe is hung out by above equipment, is transferred to anneal, by cooling, sandblasting, reconditioning, polishing, cutting etc. Later process, eventually becomes finished product.
Further illustrate beneficial effects of the present invention by the following examples:
Embodiment 1 to 7 and comparative example 1
Raw material: quartz sand (mainly provides sio2), pyrophillite (mainly provide al2o3), limestone (mainly provide cao), Dolomite (mainly providing mgo), potassium carbonate (mainly provide k2O), soda (mainly provides na2O), borax pentahydrate (main offer b2o3), fluorite (mainly provide f2), brium carbonate (mainly provide bao).
All carry out mixing using above-mentioned raw materials in embodiment 1 to 9 and comparative example 1, high temperature melting, discharging, broken processing step Suddenly it is prepared for glass dust.Wherein, in mixed process, the uniformity reaches 97%, and temperature during high temperature melting is 1000～1600 DEG C, In crushing processing process, the particle diameter of glass dust is crushed to less than 5 mesh.
Difference is, the proportioning of each raw material is different, and in made glass dust, the content of each composition is different, is specifically shown in Following table:
Chemical composition adopts the x-ray fluorescence spectrophotometer that power ＆ light company of the U.S. produces to measure, and its unit is percentage by weight.
Embodiment 8 to 14 and comparative example 2
Prepare glass isolator using the glass dust in above-described embodiment 1 to 7 respectively in embodiment 8 to 14, use in comparative example 2 Glass isolator prepared by glass dust in above-mentioned comparative example 1:
Glass dust is mixed with waterglass, obtains mixture；Mixture is carried out suppressing, solidifies, obtains described glass isolator. Wherein, glass dust is mixed by weight 10:1 with waterglass, pressing process is as follows: compound is poured into compacting die cavity, Shakeout, cover mold, top mold deadweight compacting mixture, the demoulding, obtain the glass isolator that thickness is 10cm.
Measure the softening point of glass isolator and high temperature viscosity in each embodiment, result is as shown in the table:
High temperature physical property is the gx-iii type high temperature property tester being produced using Beijing film institute, and its unit is DEG C； High temperature viscosity is the rotary high temp viscosity measuring instrument being produced using U.S. theta, and its unit is DEG C.
In addition, as a comparison, in Chinese patent zl201110115128.9, the softening point of glass isolator is 1260 ± 40 DEG C, high Warm viscosity is 1170 ± 50 DEG C, and in Chinese patent 201310481682.8, the softening point of glass isolator is 1060 ± 40 DEG C, and high temperature glues Spend for 1090 ± 50 DEG C.
Embodiment 15
Glass isolator using preparation in embodiment 14 carries out metallic vertical hot extrusion test, and process of the test is as follows:
The solid blank of large-size stainless steel puts into heating furnace, high-temperature heating (1200 DEG C), held for some time (14 hours).Will Blank is transferred to de-scaling station, removes surface scale completely.Blank is transferred to glass dust coating station, in its surface-coated Outer dusting 844-7.Blank is transferred to punching station, blank is vertical to enter punching recipient, dusting in end face applying thereon. Hollow blank is transferred to cavetto station, blank is accomplished as far as possible cylinder.Hollow blank is transferred to heating furnace, high-temperature heating (1200 DEG C), mend warm certain time (4 hours).Hollow blank is transferred to de-scaling station, removes the oxide skin of surfaces externally and internally.
Blank is transferred to glass dust coating station, outer surface applies outer dusting, dusting in inner surface applying.It is transferred to crowded Pressure station, blank vertical entrance recipient.The glass isolator being obtained in embodiment 18 is placed on blank upper surface, squeezing needle passes through The mould of blank, glass isolator and top.Start to extrude, hollow metal blank becomes pipe by die orifice.Pipe by equipment above Hang out, be transferred to anneal, by later process such as cooling, sandblasting, reconditioning, polishing, cuttings, eventually become finished product.
Observe squeezing effect, when freshly extruded, glass melting is good, and lubrication is good, range estimation understands that tube surfaces are not scarce greatly Fall into (as shown in Figure 1)；Annealing sandblasting after, tube surfaces are smooth, range estimation there is no big defect, little defect also inconspicuous (as Fig. 2 institute Show).
Comparative example 3
Glass isolator using preparation in comparative example 2 carries out metallic vertical hot extrusion test, and process of the test is as follows:
The solid blank of large-size stainless steel puts into heating furnace, high-temperature heating (1200 DEG C), held for some time (14 hours).Will Blank is transferred to de-scaling station, removes surface scale completely.Blank is transferred to glass dust coating station, in its surface-coated Outer dusting 844-7.Blank is transferred to punching station, blank is vertical to enter punching recipient, dusting in end face applying thereon. Hollow blank is transferred to cavetto station, blank is accomplished as far as possible cylinder.Hollow blank is transferred to heating furnace, high-temperature heating (1200 DEG C), mend warm certain time (4 hours).Hollow blank is transferred to de-scaling station, removes the oxide skin of surfaces externally and internally.
Blank is transferred to glass dust coating station, outer surface applies outer dusting, dusting in inner surface applying.It is transferred to crowded Pressure station, blank vertical entrance recipient.The glass isolator being obtained in comparative example 2 is placed on blank upper surface, squeezing needle passes through The mould of blank, glass isolator and top.Start to extrude, hollow metal blank becomes pipe by die orifice.Pipe by equipment above Hang out, be transferred to anneal, by later process such as cooling, sandblasting, reconditioning, polishing, cuttings, eventually become finished product.
Observe squeezing effect, when freshly extruded, tube surfaces are attached with a lot of molten glass, and more than 30%, lubrication is relatively for range estimation Difference, distant it is impossible to find out defect (as shown in Figure 3)；It is evident that tube surfaces out-of-flatness after annealing sandblasting, load mould, draw The little defect such as trace more (as shown in Figure 4).
From data above, the glass dust of preparation in the embodiment of the present invention 1 to 7, make after glass isolator its softening point and High temperature viscosity is all relatively low, and the lubricant being highly suitable in metallic vertical hot extrusion uses.Confirm in embodiment 15 using this The glass dust that invention provides, makes after glass isolator as the lubricant in metal hot extrusion process, can be effectively improved metal and squeeze The quality of compacting product.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for the skill of this area For art personnel, the present invention can have various modifications and variations.All within the spirit and principles in the present invention, made any repair Change, equivalent, improvement etc., should be included within the scope of the present invention.

Claims (10)

1. it is characterised in that by weight percentage, described glass dust includes a kind of glass dust: 50%～62% sio2, 2% ～8% al2o3, 0.1%～13% cao, 0.1%～10% mgo, 0.1%～10% k2O, 0.1%～30% na2O, 0～12% b2o3, 0～7% f and 0～2% impurity.
2. it is characterised in that by weight percentage, described glass dust includes glass dust according to claim 1: 55% ～62% sio2, 2%～5% al2o3, 6%～13% cao, 2%～5% mgo, 6%～8% k2O, 10%～ 25% na2O, 0～7% b2o3, 0～7% f and 0～2% impurity.
3. glass dust according to claim 1 and 2 is it is characterised in that described sio2With described al2o3Weight than for 20 ～27:1.
4. glass dust according to claim 3 is it is characterised in that described sio2With described na2The weight of o is than for 2.2～3: 1.
5. glass dust according to claim 4 is it is characterised in that the particle diameter of described glass dust is less than 5 mesh.
6. a kind of glass isolator, is prepared from for raw material using waterglass and glass dust it is characterised in that described glass dust is right Require the glass dust any one of 1 to 5.
7. glass isolator according to claim 6 it is characterised in that described waterglass account for described glass dust weight 1～ 30%.
8. glass isolator according to claim 6 is it is characterised in that the method forming described glass isolator includes:
Described glass dust is mixed with waterglass, obtains mixture；
Described mixture is carried out suppressing, solidifies, obtains described glass isolator.
9. application in metallic vertical hot extrusion process for the glass isolator any one of a kind of claim 6 to 8.
10. a kind of method of metallic vertical hot extrusion is it is characterised in that comprise the following steps:
Metal stock is heated, obtains heating material；
Glass isolator any one of claim 6 to 8 is placed between described heating material and mould, vertical extruding, obtains To pressing material；And
Described pressing material is carried out anneal, sandblasting and polishing, obtain final metal product.
CN201610785123.XA 2016-08-30 2016-08-30 Glass powder, glass mat, application of glass mat and method for metal vertical hot extrusion Pending CN106345835A (en)

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Citations (7)

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