CN105503033B - Gasket for thermal simulation test and preparation method thereof - Google Patents
Gasket for thermal simulation test and preparation method thereof Download PDFInfo
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- CN105503033B CN105503033B CN201410502304.8A CN201410502304A CN105503033B CN 105503033 B CN105503033 B CN 105503033B CN 201410502304 A CN201410502304 A CN 201410502304A CN 105503033 B CN105503033 B CN 105503033B
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Abstract
The invention discloses a gasket for thermal simulation test and a preparation method thereof, belonging to the field of detection of material performance. The gasket comprises the following components by weight: 60 to 70% of metal powder, 25 to 35% of glass powder and 3 to 5% of a binder, wherein the particle sizes of the metal powder and the glass powder are both in a micro-nano order. The preparation method for the gasket comprises the following steps: fully mixing the metal powder with glass powder; then adding the binder; and carrying out adequate stirring and then carrying out tableting so as to obtain a thin piece which is the gasket used for reducing nonuniform sample deformation caused by friction and cooling in thermal simulation test. The invention has the following advantages: due to existence of the metal powder, the gasket can be heated through induction; and due to existence of the glass powder, problems in cooling of an end part can be overcome, and a friction coefficient between a pressure head and a sample can be reduced.
Description
Technical field
The present invention relates to a kind of pad in thermal modeling test and preparation method thereof, belong to material property detection neck
Domain.
Background technology
Thermodynamic simulated experiment machine is a kind of experimental facilities for research material deformational behavior at high temperature, mainly there is pressure
Contracting, stretching, three kinds of modes of texturing are reversed, wherein compression is most widely used, especially in rolling metal processing industry,
It is to formulate the indispensable equipment of processing technology.But there are two unfavorable factors when experiment is compressed in this equipment.One is
Friction between sample end and pressure head causes that sample is subject to a radial constraint in end surface so that sample deformation is uneven
It is even, so as to produce cydariform and cause the uneven distribution of strain so that cannot accurately be organized.For rubbing to deformation
Influence, is generally described using sample mid diameter after deformation with sample end diameter ratio d, and the ratio is bigger, then show to rub
Wipe bigger on the uneven influence of deformation sample deformation, so as to the influence to Strain Distribution is bigger, in the ideal case (without friction shadow
Ringing) ratio is 1, and the ratio is 1.3~1.4 or so when lubricant method is not taken；Two be pressure head temperature it is relatively low, typically
It is room temperature before experiment.And in compression experiment, sample can be heated to 800~1200 DEG C or so.So sample end and pressure head
Between there is heat transfer so that sample end region temperature is relatively low, cause sample overall deformation uneven, cause experiment to obtain
Obtain accurately tissue and resistance of deformation.For the evaluation of end cooling influence, usually using holding original sample diameter dimension position
Length and the ratio s of original sample length this standard, the influence of the bigger end cooling of the ratio is bigger.In the ideal case
(when being cooled down without the end) ratio is 0, and the ratio is up to 0.4 or so in the relatively low material of some coefficients of heat conduction.
Traditionally people are more abundant to the understanding of thermal simulation experiment for rubbing, so taking multiple means to reduce
The influence of friction, such as places pure graphite flake lubricant to reduce frictional force in the middle of sample and pressure head.Although but this measure
Frictional force is effectively reduced, but to reducing because sample end region temperature is uneven caused by the heat transfer between sample and pressure head
The deformation for causing is uneven but without any effect.Because graphite flake can only be normal temperature clamping, graphite flake sheet in clamping
Body can not be inductively heated, therefore when sample is heated to high temperature (900~1200 DEG C), due to sample and graphite flake exist compared with
The big temperature difference causes the heat transfer therebetween sample end can be caused to cool down, thus graphite flake can only play reduction friction and cannot
Change end cooling problem.Because sample is inductively heated, therefore it is one to install sheet metal additional between sample and pressure head
Solve the effective means of the relatively low sample deformation problem of non-uniform for causing of sample end region temperature.But at high temperature metallic gasket with gold
A larger frictional force can be produced between category sample preparation, is caused so as to have adverse effect on.The generation of this frictional force is main
Because metallic gasket is unable to arbitrary deformation, so as to produce constraint to sample.Therefore up to the present also without a kind of effective
Means can simultaneously solve the problems, such as friction and end cooling, have many researchs also to attempt in this respect, such as Chinese patent
CN101182862 proposes a kind of pad of metal+graphite surface, and it is embedded in by kirsite matrix and solid lubricant
Constitute together, its feature is still to have used graphite rod to be used as lubrication on metal, is carried out using graphite flake with tradition
Lubrication is principle of uniformity.The defect of this method is that can only solve lubrication problem, and cools down the examination that problem is caused for end
Sample deformation problem of non-uniform is helpless.Chinese patent CN101780551A proposes a kind of normal temperature lubrication piece, the lubrication piece
With the lubricating resin layer being formed on base material, lubricating resin layer is comprising two or more water-soluble to the different solubility of water
Property resin, and being formed by microphase-separated, the patent is characterised by being lubricated using resin material, but this kind of pad by
It is relatively low in fusing point, therefore cannot be in applied at elevated temperature, and thermal simulation sample is generally carried out more than 700 DEG C.Chinese patent
CN1257908 proposes a kind of lubricant of metallized thermoplastic processing, particularly a kind of metal hot-working profit of not graphitiferous
Lubrication prescription.The technology has two, first be liquid in normal temperature, cannot clamping in thermal modeling test.And can be
Improve friction problem, but there is no effect to the sample deformation problem of non-uniform that sample end cooling problem is caused.Chinese patent
CN1468944 proposes a kind of glass lubricant specially for hot extrusion of high temperature alloy pipe, and the technology is not only acted on high temperature lubricating,
Also there is heat-blocking action, the reduction of blank temperature is alleviated；And stable chemical nature, there is no chemistry with blank metal anti-
Should；Lubricant of the present invention is into thick at service temperatures, and lubricant effect is good.So as to improve product quality, life is improve
Efficiency is produced, production cost is reduced.Experiment shows, using the technology than the life-span raising one using other lubricant Extruding dies
More than times；Extrusion tube blank shows that quality reaches requirement；Extruding force reduction by 18%, reduces the energy and disappears compared with other lubricants
Consumption；Slow down the reduction of Preform surface temperature, improve the plasticity of material.Compared with the drilling cold rolling process of existing use, material can
More than 10% is saved, efficiency can improve more than 100%, cost reduction by more than 40%.The technology proposes its lubricant not only to be had
Lubrication, and also there is heat-blocking action.But because itself can not be inductively heated, therefore it is necessarily deposited between sample
In larger temperature difference, therefore heat transfer is inevitable, sample end region temperature is necessarily caused less than the problem of center portion, so as to cause
The sample deformation for causing is uneven.
The content of the invention
The present invention proposes a kind of pad, can efficiently solve and tested using the hot modeling test machine of induction heating mode
Sample deformation inequality problem in journey caused by friction and end are cooled down, so as to improve the accuracy of thermal simulation experiment result
And precision.
To achieve these goals, the present invention is achieved by the following scheme：
The pad uneven for reducing friction in thermal modeling test and sample deformations caused by cooling, by by weight hundred
The following component composition of fraction meter：
Metal dust：60~70%；
Glass powder：25~35%；
Binding agent：3~5%；
Wherein, the particle diameter that the particle diameter of the metal dust and glass powder is micro-nano, i.e. powder is nanometer to micron
Level.
Firstly, since the presence of metal dust, the pad can be inductively heated, and reach the temperature close with sample higher
Degree, the heat transfer between isolation pressure head and sample, so as to alleviate sample end cooling in the prior art to thermal simulation experiment result
The adverse effect for causing.It is the presence of metal dust with the difference of prior art, therefore can be inductively heated so that pad
Temperature difference between sample is reduced, so as to while lubricant effect is played, significantly improve sample due between pad
The sample deformation problem of non-uniform that the cooling of sample end is caused caused by heat transfer.
Secondly as the presence of glass powder, end cooling problem can be not only solved using the pad can also be reduced
Coefficient of friction between pressure head and sample.Because glass dust can be presented molten in experimental temperature (at 800~1200 DEG C)
State, reduces the friction between pressure head and sample, alleviates the adverse effect that friction brings to thermal simulation experiment.In sum, using this
Pad can simultaneously alleviate the adverse effect that friction and end cooling bring to thermal simulation experiment result.
Preferably, the metal dust is consistent with the composition of sample.
Preferably, the binding agent includes at least in polyvinyl butyral resin, polyethylene glycol and PVP
Kind.
It is a kind of be used to reduce friction in thermal modeling test as described herein and cool down caused by sample deformations it is uneven
Pad preparation method, it comprises the following steps：
Metal dust is sufficiently mixed with glass powder first, is subsequently adding binding agent, compressing tablet is carried out after being sufficiently stirred for, made
Thin slice, the uneven pad as reducing friction in thermal modeling test and sample deformations caused by cooling.
Preferably, a diameter of 10~14mm of the thin slice, is highly 1~2mm.
The advantage of the invention is that：
Firstly, since the presence of metal dust, the pad can be inductively heated, and reach the temperature close with sample higher
Degree, the heat transfer between isolation pressure head and sample, so as to alleviate sample end cooling in the prior art to thermal simulation experiment result
The adverse effect for causing.It is the presence of metal dust with the difference of prior art, therefore can be inductively heated so that pad
Temperature difference between sample is reduced, so as to while lubricant effect is played, significantly improve sample due between pad
The sample deformation problem of non-uniform that the cooling of sample end is caused caused by heat transfer.
Secondly as the presence of glass powder, end cooling problem can be not only solved using the pad can also be reduced
Coefficient of friction between pressure head and sample.Because glass dust can be presented molten in experimental temperature (at 800~1200 DEG C)
State, reduces the friction between pressure head and sample, alleviates the adverse effect that friction brings to thermal simulation experiment.In sum, using this
Pad can simultaneously alleviate the adverse effect that friction and end cooling bring to thermal simulation experiment result.
Specific embodiment
With reference to embodiment, the invention will be further described, but protection scope of the present invention is not only limited to implement
Example.
Embodiment 1：Titanium alloy hot simulation compression pad
A) by the micron-sized titanium alloy metal dust that mass percent is 65%, 30% micron-sized glass powder is abundant
Mixing, is subsequently added 5% binding agent PVP, and stirring is sufficiently mixed again, obtains mixed-powder；
B) mixed-powder after being sufficiently stirred for using mould is pressed into diameter 14mm, the as thin slice of height 1mm, titanium alloy
Use hot simulation compression pad；
C) when thermal modeling test is carried out, the pad is respectively placed in sample two ends, is heated to 1000 DEG C, carry out 50% change
Shape is compressed.
D) sample mid diameter and sample end diameter ratio d=1.03 after measurement compression, keep original sample diameter dimension
The length at position and the ratio s=0.02 of original sample length, from the d values and s values of above-mentioned actual measurement, and combine discussion above,
It is considered that the pad serves the effect of good improvement friction and end cooling, sample deformation is highly uniform.
Embodiment 2：High temperature alloy hot simulation compression pad
A) by the micron-sized high temperature alloy metal dust that mass percent is 60%, 35% micron-sized glass powder fills
Divide mixing, be subsequently added 5% polyvinyl butyral resin, stirring is sufficiently mixed again, obtain mixed-powder；
B) powder after being sufficiently stirred for using mould is pressed into diameter 14mm, the thin slice of height 1mm；
C) when thermal modeling test is carried out, the pad is respectively placed in sample two ends, is heated to 1100 DEG C, carry out 50% change
Shape is compressed；
D) sample mid diameter and sample end diameter ratio d=1.04 after measurement compression.Keep original sample diameter dimension
The length at position and the ratio s=0.03 of original sample length.From the d values and s values of above-mentioned actual measurement, and discussion above is combined,
It is considered that the pad serves the effect of good improvement friction and end cooling, sample deformation is highly uniform.
Embodiment 3：Precise Alloy hot simulation compression pad
A) by the micron-sized Precise Alloy metal dust that mass percent is 70%, 25% micron-sized glass powder fills
Divide mixing, be subsequently heated 5% polyethylene glycol, stirring is sufficiently mixed again, obtain mixed-powder；
B) mixed-powder after being sufficiently stirred for using mould is pressed into diameter 14mm, the thin slice of height 1mm.
C) when thermal modeling test is carried out, the pad is respectively placed in sample two ends, is heated to 900 DEG C, carry out 50% change
Shape is compressed.
D) sample mid diameter and sample end diameter ratio d=1.03 after measurement compression, keep original sample diameter dimension
The length at position and the ratio s=0.03 of original sample length, from the d values and s values of above-mentioned actual measurement, and combine discussion above,
It is considered that the pad serves the effect of good improvement friction and end cooling, sample deformation is highly uniform.
Embodiment 4：Precise Alloy hot simulation compression pad
A) by the micron-sized Precise Alloy metal dust that mass percent is 65%, 32% micron-sized glass powder fills
Divide mixing, be subsequently heated 3% polyethylene glycol, stirring is sufficiently mixed again, obtain mixed-powder；
B) mixed-powder after being sufficiently stirred for using mould is pressed into diameter 14mm, the thin slice of height 1mm.
C) when thermal modeling test is carried out, the pad is respectively placed in sample two ends, is heated to 900 DEG C, carry out 50% change
Shape is compressed.
D) sample mid diameter and sample end diameter ratio d=1.05 after measurement compression, keep original sample diameter dimension
The length at position and the ratio s=0.02 of original sample length, from the d values and s values of above-mentioned actual measurement, and combine discussion above,
It is considered that the pad serves the effect of good improvement friction and end cooling, sample deformation is highly uniform.
Comparative example 1：Graphite flake
A) when thermal modeling test is carried out, the graphite flake is respectively placed in sample two ends, is heated to 1000 DEG C, carry out 50%
Alternating compression.
B) sample mid diameter and sample end diameter ratio d=1.2 after measurement compression, keep original sample diameter dimension portion
The length of position and the ratio s=0.03 of original sample length, from the d values and s values of above-mentioned actual measurement, and combine discussion above, can
To think that the pad serves good improvement friction effect, but end cooling problem is still present, so as to cause sample to produce
Lantern shape, sample deformation is uneven.
Comparative example 2：
A) when thermal modeling test is carried out, the sheet metal is respectively placed in sample two ends, is heated to 1000 DEG C, carry out 50%
Alternating compression.
B) sample mid diameter and sample end diameter ratio d=1.03 after measurement compression.Keep original sample diameter dimension
The length at position and the ratio s=0.25 of original sample length.From the d values and s values of above-mentioned actual measurement, and discussion above is combined,
It is considered that the pad serves good improvement end cooling effect, but friction problem is still present, so as to cause sample to produce
Cydariform is given birth to, sample deformation is uneven.
Finally it should be noted that：Above example is only used to illustrate the present invention and not limit technology described in the invention
Scheme；Therefore, although this specification with reference to each above-mentioned embodiment to present invention has been detailed description, this
Field it is to be appreciated by one skilled in the art that still can be modified to the present invention or equivalent；And all do not depart from this
The technical scheme of the spirit and scope of invention and its improvement, it all should cover in scope of the presently claimed invention.
Claims (5)
1. the pad being used in thermal modeling test, it is characterised in that be made up of the following component of percentage：
Metal dust：60~70%；
Glass powder：25~35%；
Binding agent：3~5%；
Wherein, the particle diameter of the metal dust and glass powder is micro-nano.
2. the pad being used in thermal modeling test as claimed in claim 1, it is characterised in that the metal dust and sample into
Divide consistent.
3. the pad being used in thermal modeling test as claimed in claim 1, it is characterised in that the binding agent includes polyvinyl alcohol
At least one in butyral, polyethylene glycol and PVP.
4. it is a kind of as described in claim 1 or 2 or 3 be used for thermal modeling test in pad preparation method, it is characterised in that bag
Include following steps：
Metal dust is sufficiently mixed with glass powder first, is subsequently adding binding agent, compressing tablet is carried out after being sufficiently stirred for, be obtained thin
Piece, the uneven pad as reducing friction in thermal modeling test and sample deformations caused by cooling.
5. preparation method as claimed in claim 4, it is characterised in that a diameter of 10~14mm of the thin slice, highly for 1~
2mm。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410502304.8A CN105503033B (en) | 2014-09-26 | 2014-09-26 | Gasket for thermal simulation test and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410502304.8A CN105503033B (en) | 2014-09-26 | 2014-09-26 | Gasket for thermal simulation test and preparation method thereof |
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| Publication Number | Publication Date |
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| CN105503033A CN105503033A (en) | 2016-04-20 |
| CN105503033B true CN105503033B (en) | 2017-05-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410502304.8A Active CN105503033B (en) | 2014-09-26 | 2014-09-26 | Gasket for thermal simulation test and preparation method thereof |
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| CN108240963B (en) * | 2016-12-23 | 2020-06-12 | 宝武特种冶金有限公司 | Method for measuring friction coefficient by using thermal simulator |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1468944A (en) * | 2002-07-19 | 2004-01-21 | 中国科学院金属研究所 | Prepn and application of glass lubricant specially for hot extrusion of high temperature alloy pipe |
| CN101182862A (en) * | 2007-12-20 | 2008-05-21 | 姚祖胜 | Zinc-radical abrasion resistant alloy self-lubricated bearing, slide board, pad and manufacturing method |
| CN202676535U (en) * | 2012-06-20 | 2013-01-16 | 鞍钢股份有限公司 | Anvil head for quenching thermal simulation sample |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2690906B2 (en) * | 1987-09-02 | 1997-12-17 | 三菱重工業株式会社 | High temperature gasket |
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2014
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1468944A (en) * | 2002-07-19 | 2004-01-21 | 中国科学院金属研究所 | Prepn and application of glass lubricant specially for hot extrusion of high temperature alloy pipe |
| CN101182862A (en) * | 2007-12-20 | 2008-05-21 | 姚祖胜 | Zinc-radical abrasion resistant alloy self-lubricated bearing, slide board, pad and manufacturing method |
| CN202676535U (en) * | 2012-06-20 | 2013-01-16 | 鞍钢股份有限公司 | Anvil head for quenching thermal simulation sample |
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Effective date of registration: 20200513 Address after: 200940 room 1277, building 216, 1269 Shuishui Road, Baoshan District, Shanghai Patentee after: Baowu Special Metallurgy Co., Ltd Address before: 200940 No. 1269, Fisheries Road, Shanghai, Baoshan District Patentee before: BAOSTEEL SPECIAL STEEL Co.,Ltd. |
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