CN102692133A - Composite load bearing board for powder metallurgy vacuum sintering furnace and manufacturing method thereof - Google Patents
Composite load bearing board for powder metallurgy vacuum sintering furnace and manufacturing method thereof Download PDFInfo
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- CN102692133A CN102692133A CN2012101516719A CN201210151671A CN102692133A CN 102692133 A CN102692133 A CN 102692133A CN 2012101516719 A CN2012101516719 A CN 2012101516719A CN 201210151671 A CN201210151671 A CN 201210151671A CN 102692133 A CN102692133 A CN 102692133A
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- mullite
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- 238000005245 sintering Methods 0.000 title claims abstract description 63
- 239000002131 composite material Substances 0.000 title claims abstract description 38
- 238000004663 powder metallurgy Methods 0.000 title claims abstract description 28
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 14
- 229910052863 mullite Inorganic materials 0.000 claims abstract description 67
- 239000002184 metal Substances 0.000 claims abstract description 58
- 229910052751 metal Inorganic materials 0.000 claims abstract description 58
- 230000007704 transition Effects 0.000 claims abstract description 43
- 239000003795 chemical substances by application Substances 0.000 claims description 29
- 229910052799 carbon Inorganic materials 0.000 claims description 26
- 239000002994 raw material Substances 0.000 claims description 24
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 22
- 239000000428 dust Substances 0.000 claims description 22
- 238000000034 method Methods 0.000 claims description 22
- 239000000203 mixture Substances 0.000 claims description 22
- 239000000463 material Substances 0.000 claims description 15
- 239000000843 powder Substances 0.000 claims description 15
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 13
- 239000003595 mist Substances 0.000 claims description 13
- 239000011734 sodium Substances 0.000 claims description 12
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 11
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 11
- 229910052593 corundum Inorganic materials 0.000 claims description 11
- 239000010431 corundum Substances 0.000 claims description 11
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 claims description 11
- 229910052708 sodium Inorganic materials 0.000 claims description 11
- 238000013459 approach Methods 0.000 claims description 9
- 238000002156 mixing Methods 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 230000000399 orthopedic effect Effects 0.000 claims description 7
- 150000001875 compounds Chemical class 0.000 claims description 6
- 238000002360 preparation method Methods 0.000 claims description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- 238000001035 drying Methods 0.000 claims description 4
- 239000008187 granular material Substances 0.000 claims description 4
- 239000002202 Polyethylene glycol Substances 0.000 claims description 3
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 3
- 238000005056 compaction Methods 0.000 claims description 3
- 239000003292 glue Substances 0.000 claims description 3
- 229920001223 polyethylene glycol Polymers 0.000 claims description 3
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 3
- 230000035939 shock Effects 0.000 abstract description 5
- 239000004927 clay Substances 0.000 abstract description 4
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 239000011159 matrix material Substances 0.000 abstract 5
- 239000000853 adhesive Substances 0.000 abstract 1
- 230000001070 adhesive effect Effects 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- 239000002245 particle Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
- 230000002411 adverse Effects 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000002086 nanomaterial Substances 0.000 description 1
- 238000009700 powder processing Methods 0.000 description 1
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- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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Abstract
The invention discloses a composite load bearing board for a powder metallurgy vacuum sintering furnace and a manufacturing method thereof. The composite load bearing board comprises a corundum-mullite matrix plate and a metal attachment plate which are sintered into one whole body; a transition layer is arranged between the corundum-mullite matrix plate and the metal attachment plate; the metal attachment plate is arranged on the corundum-mullite matrix plate, so that the heat conduction efficiency is greatly improved; and the transition layer is arranged between the corundum-mullite matrix plate and the metal attachment plate, so that the adhesive force between the corundum-mullite matrix plate and the metal attachment plate is improved and the yield is improved. The composite load bearing board does not contain clay components, so that the influence on a powder metallurgy product cannot be caused; and the composite load bearing board has very good thermal shock resistance and the service life of the composite load bearing board is prolonged.
Description
Technical field
The present invention relates to powder metallurgical technology, relate in particular to the load bearing board that uses in a kind of powder metallurgy vacuum sintering furnace.
Background technology
Flourish along with powder metallurgy industry, in the every field of powder metallurgy industry, metal injection molded production stainless steel powder metallurgical goods for example, ceramic industry is produced zirconia ceramic product, all will use load bearing board.The load bearing board material of existing technology manufacturing mainly is a corundum-mullite; But because the basic reason of the chemical composition of its prescription, cause existing the defective of following several respects: one of which, simple corundum-mullite material; Its thermal conductivity factor is very low; The powder metallurgy product that causes putting on the load bearing board is heated inhomogeneous, thereby causes the inconsistent of sintering temperature, shows that finally the product size fluctuation is bigger; They are two years old; Because added clay in the prescription, thereby introduced some oxide impurities, these impurity present certain activity in the powder metallurgy product sintering process; Thereby, cause the big adverse consequences of haftplatte, distortion and size fluctuation with product generation certain reaction; Its three, existing load bearing board is in compacting, sintering and production process such as orthopedic, yield rate is lower; Its four, existing load bearing board in use because thermal shock resistance is not enough, causes access times lower, only about 50 to 80 times.
Summary of the invention
Technical problem to be solved by this invention provides a kind ofly to be had high thermal conductivity, long service life and can ensure that the powder metallurgy vacuum sintering furnace of sintered metal product quality uses composite calcining-endure plate.
For solving the problems of the technologies described above; Technical scheme of the present invention is: a kind of powder metallurgy vacuum sintering furnace is used composite calcining-endure plate; Comprise the corundum-mullite parent plate and the metal lamina affixad that are sintered to one, be provided with transition zone between said corundum-mullite parent plate and the said metal lamina affixad; According to weight portion, said corundum-mullite parent plate comprises 75 parts～90 parts low sodium corundum, 5 parts～15 parts high-purity electrofused mullites, 1 part～5 parts superactivity micro mist Alpha-alumina, 1 part～5 parts nanometer SiO
2, the purity of said high-purity electrofused mullite is more than or equal to 95%; Said metal lamina affixad comprises micron-sized low-carbon (LC) carbonyl iron dust; Said transition zone comprises 47.5 parts～49.5 parts corundum-mullite parent plate composition and 47.5 parts～49.5 parts low-carbon (LC) carbonyl iron dust.
As a kind of optimized technical scheme, the weight percent content of carbon is smaller or equal to 0.05% in the said micron-sized low-carbon (LC) carbonyl iron dust.
Owing to adopted technique scheme, a kind of powder metallurgy vacuum sintering furnace is used composite calcining-endure plate, comprises the corundum-mullite parent plate and the metal lamina affixad that are sintered to one, is provided with transition zone between said corundum-mullite parent plate and the said metal lamina affixad; The metal lamina affixad is set on the corundum-mullite parent plate, has improved heat transfer efficiency greatly; Between corundum-mullite parent plate and metal lamina affixad, be provided with transition zone, improved the adhesion strength between corundum-mullite parent plate and the metal lamina affixad, improved yield rate; Do not contain clay component in this composite calcining-endure plate, can not impact powder metallurgy product; The thermal shock resistance of this composite calcining-endure plate is very good, has prolonged service life.
Another technical problem to be solved by this invention provide a kind of can make have high thermal conductivity, long service life and in sintering process not can with the powder metallurgy vacuum sintering furnace of powder metallurgy product generation adverse chemical reaction preparation method with composite calcining-endure plate.
For solving the problems of the technologies described above, technical scheme of the present invention is: a kind of powder metallurgy vacuum sintering furnace comprises the steps: with the manufacturing approach of composite calcining-endure plate
Step 1, batching:
1. the parts by weight of raw materials of corundum-mullite parent plate is: low sodium corundum accounts for 75 parts～90 parts, and high-purity electrofused mullite accounts for 5 parts～15 parts, and the micro mist Alpha-alumina of superactivity accounts for 1 part～5 parts, nanometer SiO
2Account for 1 part～5 parts, the purity of said high-purity electrofused mullite is more than or equal to 95%;
2. the raw material of metal lamina affixad comprises 95 parts～99 parts micron-sized low-carbon (LC) carbonyl iron dust and 1 part～5 parts forming agent;
3. the transition zone between corundum-mullite parent plate and metal lamina affixad adopts 47.5 parts～49.5 parts corundum-mullite parent plate raw material, 47.5 parts～49.5 parts low-carbon (LC) carbonyl iron dust and 1 part～5 parts forming agent to mix;
Step 2, batch mixing:
2. the mixing method of metal lamina affixad raw material, at first water dissolves forming agent, mixes forming agent solution and other material powders of metal lamina affixad then, and is dry successively then, sieve and granulate;
3. the mixing method of transition zone raw material, at first water dissolves forming agent, mixes forming agent solution and other material powders of transition zone then, and is dry successively then, sieve and granulate;
Step 3, compacting:
1. adopt hydraulic press to grow up 50 millimeters wide 50 millimeters, thick 1～2 millimeter transition zone slug press to the transition zone compound compacting after granulating;
2. adopt hydraulic press to grow up 100 millimeters wide 100 millimeters, thick 3～5 millimeters parent plate slug press to four blocks of transition zone slug presses with the powder compaction of corundum-mullite parent plate;
3. adopt hydraulic press to grow up 100 millimeters wide 100 millimeters, thick 1～2 millimeter lamina affixad slug press to the metal lamina affixad compound compacting after granulating;
Step 4, sintering:
1. under 1700 ℃～1800 ℃ temperature, carry out sintering to the parent plate slug press 90～180 minutes with vacuum sintering furnace, process parent plate sintering blank;
2. under 1200 ℃～1300 ℃ temperature, carry out sintering to parent plate sintering blank and lamina affixad slug press 90～180 minutes with vacuum sintering furnace, process the composite calcining-endure plate blank;
Step 5, orthopedic:
Under 1000 ℃～1100 ℃ temperature, carry out with vacuum sintering furnace the composite calcining-endure plate blank orthopedic, thereby process composite calcining-endure plate, its flatness can be controlled within 0.1 millimeter.
As a kind of optimized technical scheme, said forming agent comprises 50% polyethylene glycol and 50% polyvinyl alcohol.
As a kind of optimized technical scheme, in said step 2, adopt " V " type mixer and mix the glue machine.
As a kind of optimized technical scheme; In said step 2; Ratio water according to 8:1 dissolves forming agent, joins forming agent solution and other material powders of metal lamina affixad or other material powders of transition zone in the helical-ribbon type blender then to mix.
As a kind of optimized technical scheme, in said step 2, adopt tilting-type granulator or vibratory sieve granulator that the raw mix of metal lamina affixad and the raw mix of transition zone are granulated respectively.
As a kind of optimized technical scheme, in said step 2, with the raw mix of the raw mix of metal lamina affixad and transition zone in 90 ℃ drying box dry 0.8 to 1.2 hour.
Through above-mentioned manufacturing approach, can produce have high thermal conductivity, long service life and can ensure that the powder metallurgy vacuum sintering furnace of sintered metal product quality uses composite calcining-endure plate.
Description of drawings
Following accompanying drawing only is intended to the present invention is done schematic illustration and explanation, not delimit the scope of the invention.Wherein,
Accompanying drawing is the structural representation of the embodiment of the invention;
Among the figure: 1-corundum-mullite parent plate; The 2-transition zone; 3-metal lamina affixad.
The specific embodiment
Describe in detail with reference to the accompanying drawings according to exemplary embodiment of the present invention.Here, it should be noted that in the accompanying drawings, give structure and the essentially identical part of function, and, omitted about the redundancy of substantially the same part and described in order to make specification simpler and clearer with identical Reference numeral.
Embodiment one:
Shown in accompanying drawing, a kind of powder metallurgy vacuum sintering furnace is used composite calcining-endure plate, comprises the corundum-mullite parent plate 1 and metal lamina affixad 3 that are sintered to one, is provided with transition zone 2 between said corundum-mullite parent plate 1 and the said metal lamina affixad 3; According to weight portion, said corundum-mullite parent plate 1 comprises 80 parts low sodium corundum, 15 parts of high-purity electrofused mullites, 3 parts superactivity micro mist Alpha-alumina, 2 parts nanometer SiO
2Wherein, Na in the said low sodium corundum
2The content of O≤0.1%; The purity of said high-purity electrofused mullite is more than or equal to 95%, and the content of glassy phase is smaller or equal to 5%;
Said metal lamina affixad 3 comprises micron-sized low-carbon (LC) carbonyl iron dust; Wherein, in the said micron-sized low-carbon (LC) carbonyl iron dust weight percent content of carbon smaller or equal to 0.05%;
Said transition zone 2 comprises 48.5 parts corundum-mullite parent plate 1 composition and 48.5 parts low-carbon (LC) carbonyl iron dust.
The granularity of superactivity micro mist Alpha-alumina little (the D50 value is less than 0.5 μ m), active big, and grain shape good (subcircular).The granularity of common Alpha-alumina micro mist is big, and the D50 value is greater than 1.0um; Because superactivity micro mist Alpha-alumina granularity is little, activity is big, thereby can play the reduction firing temperature to product, improves the effect of product r.
At present, in the common recognition that the superfine powder processing industry has basically formed be: below the particle size diameter 100nm of nano material; The particle size diameter 100nm of submicron material～1.0 μ m; The particle size diameter 1.0 μ m～5.0 μ m of micro materials.So, nanometer SiO
2Be meant the SiO of particle size diameter below 100nm
2Material.
Metal lamina affixad 3 is set on corundum-mullite parent plate 1; Improved heat transfer efficiency greatly; Remedied the not high defective of corundum-mullite parent plate 1 thermal conductivity, solved powder metallurgy product be heated inhomogeneous, thereby cause the inconsistent technical problem of sintering temperature; Guarantee the uniformity of product size, improved product quality; Between corundum-mullite parent plate 1 and metal lamina affixad 3, be provided with transition zone 2; The composition of corundum-mullite parent plate 1 carries out the transition to the composition of metal lamina affixad 3 gradually; Corundum-mullite parent plate 1, transition zone 2 and metal lamina affixad 3 threes combine closely; Be easy to processing, improved yield rate; From top description, can know, not contain clay component in this composite calcining-endure plate, can not impact powder metallurgy product; The thermal shock resistance of this composite calcining-endure plate is very good, has prolonged service life.
A kind of powder metallurgy vacuum sintering furnace comprises the steps: with the manufacturing approach of composite calcining-endure plate
Step 1, batching:
1. the parts by weight of raw materials of corundum-mullite parent plate 1 is: low sodium corundum accounts for 80 parts, and high-purity electrofused mullite accounts for 15 parts, and the micro mist Alpha-alumina of superactivity accounts for 3 parts, nanometer SiO
2Account for 2 parts, the purity of said high-purity electrofused mullite is more than or equal to 95%, and the content of glassy phase is smaller or equal to 5%;
2. the raw material of metal lamina affixad 3 comprises 97 parts micron-sized low-carbon (LC) carbonyl iron dust and 3 parts forming agent; Wherein, said forming agent comprises 50% polyethylene glycol and 50% polyvinyl alcohol, and the weight percent content of carbon is smaller or equal to 0.05% in the said micron-sized low-carbon (LC) carbonyl iron dust;
3. the transition zone 2 between corundum-mullite parent plate 1 and metal lamina affixad 3 adopts 48.5 parts corundum-mullite parent plate 1 raw material, 48.5 parts low-carbon (LC) carbonyl iron dust and 3 parts forming agent to mix;
Step 2, batch mixing:
adopts " V " type mixer and mixes the raw material of glue machine with corundum-mullite parent plate 1 and mix according to said ratio;
2. the mixing method of metal lamina affixad 3 raw materials; Ratio according to 8:1 is dissolved forming agent with pure water; Join forming agent solution and metal lamina affixad 3 other material powders in the helical-ribbon type blender and to mix; Then in 90 ℃ drying box dry 1 hour, sieve then, with tilting-type granulator or vibratory sieve granulator the raw mix of metal lamina affixad 3 is granulated at last;
3. the mixing method of transition zone 2 raw materials; Ratio according to 8:1 is dissolved forming agent with pure water; Join forming agent solution and transition zone 2 other material powders in the helical-ribbon type blender then and mix; Then in 90 ℃ drying box dry 1 hour, sieve then, with tilting-type granulator or vibratory sieve granulator the raw mix of metal lamina affixad 3 is granulated at last;
Step 3, compacting:
1. adopt hydraulic press to grow up 50 millimeters wide 50 millimeters, thick 1.5 millimeters transition zone 2 slug presses to the transition zone 2 compounds compacting after granulating;
2. adopt hydraulic press to grow up four blocks of transition zone 2 slug presses 100 millimeters with the powder compaction of corundum-mullite parent plate 1, wide 100 millimeters, 5 millimeters parent plate slug press;
3. adopt hydraulic press to grow up 100 millimeters wide 100 millimeters, thick 1 millimeter lamina affixad slug press to the metal lamina affixad 3 compounds compacting after granulating;
Step 4, sintering:
1. under 1800 ℃ temperature, carry out sintering to the parent plate slug press 120 minutes with vacuum sintering furnace, process parent plate sintering blank;
2. under 1300 ℃ temperature, carry out sintering to parent plate sintering blank and lamina affixad slug press 120 minutes with vacuum sintering furnace, process the composite calcining-endure plate blank;
Step 5, orthopedic:
Under 1100 ℃ temperature, carry out orthopedic 30 minutes to the composite calcining-endure plate blank with vacuum sintering furnace, thereby process composite calcining-endure plate, its flatness can be controlled within 0.1 millimeter.
Through above-mentioned manufacturing approach; Compacting sintering transition zone 2 on corundum-mullite parent plate 1, and then sinter molding metal lamina affixad is combined closely for 3, three layers on the outer surface of transition zone 2; The composite calcining-endure plate heat transfer efficiency that is provided with metal lamina affixad 3 has improved; Powder metallurgy product is heated evenly, and the high conformity of sintering temperature has guaranteed the uniformity of product size; And metal lamina affixad 3 has also improved the shock resistance of composite calcining-endure plate.That is to say, utilize above-mentioned manufacturing approach, can produce have high thermal conductivity, long service life and can ensure that the powder metallurgy vacuum sintering furnace of sintered metal product quality uses composite calcining-endure plate.
Embodiment two:
Present embodiment and embodiment one are basic identical, and difference is:
Shown in accompanying drawing, according to weight portion, said corundum-mullite parent plate 1 comprises 75 parts low sodium corundum, 15 parts of high-purity electrofused mullites, 5 parts superactivity micro mist Alpha-alumina, 5 parts nanometer SiO
2
Said transition zone 2 comprises 47.5 parts corundum-mullite parent plate 1 composition and 47.5 parts low-carbon (LC) carbonyl iron dust.
A kind of powder metallurgy vacuum sintering furnace comprises the steps: with the manufacturing approach of composite calcining-endure plate
Step 1, batching is with the difference of embodiment one:
1. the parts by weight of raw materials of corundum-mullite parent plate 1 is: low sodium corundum accounts for 75 parts, and high-purity electrofused mullite accounts for 15 parts, and the micro mist Alpha-alumina of superactivity accounts for 5 parts, nanometer SiO
2Account for 5 parts;
2. the raw material of metal lamina affixad 3 comprises 95 parts micron-sized low-carbon (LC) carbonyl iron dust and 5 parts forming agent;
3. the transition zone 2 between corundum-mullite parent plate 1 and metal lamina affixad 3 adopts 47.5 parts corundum-mullite parent plate 1 raw material, 47.5 parts low-carbon (LC) carbonyl iron dust and 5 parts forming agent to mix;
Step 4, the difference of sintering and embodiment one is:
1. under 1800 ℃ temperature, carry out sintering to the parent plate slug press 90 minutes with vacuum sintering furnace, process parent plate sintering blank;
2. under 1300 ℃ temperature, carry out sintering to parent plate sintering blank and lamina affixad slug press 90 minutes with vacuum sintering furnace, process the composite calcining-endure plate blank.
Embodiment three:
Present embodiment and embodiment one are basic identical, and difference is:
Shown in accompanying drawing, according to weight portion, said corundum-mullite parent plate 1 comprises 90 parts low sodium corundum, 5 parts of high-purity electrofused mullites, 1 part superactivity micro mist Alpha-alumina, 1 part nanometer SiO
2
Said transition zone 2 comprises 49.5 parts corundum-mullite parent plate 1 composition and 49.5 parts low-carbon (LC) carbonyl iron dust.
A kind of powder metallurgy vacuum sintering furnace comprises the steps: with the manufacturing approach of composite calcining-endure plate
Step 1, batching is with the difference of embodiment one:
1. the parts by weight of raw materials of corundum-mullite parent plate 1 is: low sodium corundum accounts for 90 parts, and high-purity electrofused mullite accounts for 5 parts, and the micro mist Alpha-alumina of superactivity accounts for 1 part, nanometer SiO
2Account for 1 part;
2. the raw material of metal lamina affixad 3 comprises 99 parts micron-sized low-carbon (LC) carbonyl iron dust and 1 part forming agent;
3. the transition zone 2 between corundum-mullite parent plate 1 and metal lamina affixad 3 adopts 49.5 parts corundum-mullite parent plate 1 raw material, 49.5 parts low-carbon (LC) carbonyl iron dust and 1 part forming agent to mix;
Step 4, the difference of sintering and embodiment one is:
1. under 1800 ℃ temperature, carry out sintering to the parent plate slug press 180 minutes with vacuum sintering furnace, process parent plate sintering blank;
2. under 1300 ℃ temperature, carry out sintering to parent plate sintering blank and lamina affixad slug press 180 minutes with vacuum sintering furnace, process the composite calcining-endure plate blank.
Description of the invention provides for example with for the purpose of describing, and is not the disclosed form that exhaustively perhaps limit the invention to.A lot of modifications and variation are obvious for those of ordinary skill in the art.Selecting and describing embodiment is for better explanation principle of the present invention and practical application, thereby and makes those of ordinary skill in the art can understand the various embodiment that have various modifications that the present invention's design is suitable for special-purpose.
Claims (8)
1. a powder metallurgy vacuum sintering furnace is used composite calcining-endure plate, it is characterized in that: comprise the corundum-mullite parent plate and the metal lamina affixad that are sintered to one, be provided with transition zone between said corundum-mullite parent plate and the said metal lamina affixad;
According to weight portion, said corundum-mullite parent plate comprises 75 parts～90 parts low sodium corundum, 5 parts～15 parts high-purity electrofused mullites, 1 part～5 parts superactivity micro mist Alpha-alumina, 1 part～5 parts nanometer SiO
2, the purity of said high-purity electrofused mullite is more than or equal to 95%;
Said metal lamina affixad comprises micron-sized low-carbon (LC) carbonyl iron dust;
Said transition zone comprises 47.5 parts～49.5 parts corundum-mullite parent plate composition and 47.5 parts～49.5 parts low-carbon (LC) carbonyl iron dust.
2. powder metallurgy vacuum sintering furnace as claimed in claim 1 is used composite calcining-endure plate, it is characterized in that: the weight percent content of carbon is smaller or equal to 0.05% in the said micron-sized low-carbon (LC) carbonyl iron dust.
3. the described powder metallurgy vacuum sintering furnace of claim 1 is characterized in that with the manufacturing approach of composite calcining-endure plate, comprises the steps:
Step 1, batching:
1. the parts by weight of raw materials of corundum-mullite parent plate is: low sodium corundum accounts for 75 parts～90 parts, and high-purity electrofused mullite accounts for 5 parts～15 parts, and the micro mist Alpha-alumina of superactivity accounts for 1 part～5 parts, nanometer SiO
2Account for 1 part～5 parts, the purity of said high-purity electrofused mullite is more than or equal to 95%;
2. the raw material of metal lamina affixad comprises 95 parts～99 parts micron-sized low-carbon (LC) carbonyl iron dust and 1 part～5 parts forming agent;
3. the transition zone between corundum-mullite parent plate and metal lamina affixad adopts 47.5 parts～49.5 parts corundum-mullite parent plate raw material, 47.5 parts～49.5 parts micron-sized low-carbon (LC) carbonyl iron dust and 1 part～5 parts forming agent to mix;
Step 2, batch mixing:
2. the mixing method of metal lamina affixad raw material, at first water dissolves forming agent, mixes forming agent solution and other material powders of metal lamina affixad then, and is dry successively then, sieve and granulate;
3. the mixing method of transition zone raw material, at first water dissolves forming agent, mixes forming agent solution and other material powders of transition zone then, and is dry successively then, sieve and granulate;
Step 3, compacting:
1. adopt hydraulic press to grow up 50 millimeters wide 50 millimeters, thick 1～2 millimeter transition zone slug press to the transition zone compound compacting after granulating;
2. adopt hydraulic press to grow up 100 millimeters wide 100 millimeters, thick 3～5 millimeters parent plate slug press to four blocks of transition zone slug presses with the powder compaction of corundum-mullite parent plate;
3. adopt hydraulic press to grow up 100 millimeters wide 100 millimeters, thick 1～2 millimeter lamina affixad slug press to the metal lamina affixad compound compacting after granulating;
Step 4, sintering:
1. under 1700 ℃～1800 ℃ temperature, carry out sintering to the parent plate slug press 90～180 minutes with vacuum sintering furnace, process parent plate sintering blank;
2. under 1200 ℃～1300 ℃ temperature, carry out sintering to parent plate sintering blank and lamina affixad slug press 90～180 minutes with vacuum sintering furnace, process the composite calcining-endure plate blank;
Step 5, orthopedic:
Under 1000 ℃～1100 ℃ temperature, carried out the composite calcining-endure plate blank orthopedic 20～40 minutes with vacuum sintering furnace, thereby process composite calcining-endure plate, its flatness can be controlled within 0.1 millimeter.
4. preparation method as claimed in claim 3 is characterized in that: said forming agent comprises 50% polyethylene glycol and 50% polyvinyl alcohol.
5. preparation method as claimed in claim 3 is characterized in that: in said step 2, adopt " V " type mixer and mix the glue machine.
6. preparation method as claimed in claim 3; It is characterized in that: in said step 2; Ratio water according to 8:1 dissolves forming agent, joins forming agent solution and other material powders of metal lamina affixad or other material powders of transition zone in the helical-ribbon type blender then to mix.
7. preparation method as claimed in claim 3 is characterized in that: in said step 2, adopt tilting-type granulator or vibratory sieve granulator that the raw mix of metal lamina affixad and the raw mix of transition zone are granulated respectively.
8. preparation method as claimed in claim 3 is characterized in that: in said step 2, with the raw mix of the raw mix of metal lamina affixad and transition zone in 90 ℃ drying box dry 0.8 to 1.2 hour.
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| CN115872756A (en) * | 2021-11-10 | 2023-03-31 | 济源市耐火炉业有限公司 | Composite checker brick for large coke oven and preparation method thereof |
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| CN102692133B (en) | 2014-08-27 |
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