CN103658668B - A kind of preparation method of iron-based prealloy powder - Google Patents
A kind of preparation method of iron-based prealloy powder Download PDFInfo
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- 239000000843 powder Substances 0.000 title claims abstract description 71
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 55
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 25
- 238000002360 preparation method Methods 0.000 title claims abstract description 18
- 229910052751 metal Inorganic materials 0.000 claims abstract description 22
- 239000002184 metal Substances 0.000 claims abstract description 21
- 238000000034 method Methods 0.000 claims abstract description 17
- 238000009692 water atomization Methods 0.000 claims abstract description 8
- 238000002844 melting Methods 0.000 claims abstract description 6
- 230000008018 melting Effects 0.000 claims abstract description 6
- 238000012216 screening Methods 0.000 claims abstract description 5
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229910052802 copper Inorganic materials 0.000 claims abstract description 4
- 239000001257 hydrogen Substances 0.000 claims abstract description 4
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 4
- 239000011812 mixed powder Substances 0.000 claims abstract description 4
- 238000011084 recovery Methods 0.000 claims abstract description 4
- 238000010298 pulverizing process Methods 0.000 claims abstract 2
- 239000011701 zinc Substances 0.000 claims description 13
- 229910052725 zinc Inorganic materials 0.000 claims description 11
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 8
- 238000009835 boiling Methods 0.000 claims description 8
- 239000000126 substance Substances 0.000 claims description 8
- 238000001035 drying Methods 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 229910052759 nickel Inorganic materials 0.000 claims description 3
- 229910052718 tin Inorganic materials 0.000 claims description 3
- 239000000654 additive Substances 0.000 claims 3
- 230000000996 additive effect Effects 0.000 claims 3
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 5
- 239000001301 oxygen Substances 0.000 abstract description 5
- 229910052760 oxygen Inorganic materials 0.000 abstract description 5
- 238000009833 condensation Methods 0.000 abstract description 3
- 238000009792 diffusion process Methods 0.000 abstract description 3
- 238000011946 reduction process Methods 0.000 abstract description 2
- 238000005245 sintering Methods 0.000 description 20
- 229910003460 diamond Inorganic materials 0.000 description 16
- 239000010432 diamond Substances 0.000 description 16
- 229910052745 lead Inorganic materials 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 235000013312 flour Nutrition 0.000 description 3
- 229910002804 graphite Inorganic materials 0.000 description 3
- 239000010439 graphite Substances 0.000 description 3
- 238000000227 grinding Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000000889 atomisation Methods 0.000 description 2
- 235000013339 cereals Nutrition 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000004523 agglutinating effect Effects 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007499 fusion processing Methods 0.000 description 1
- JQJCSZOEVBFDKO-UHFFFAOYSA-N lead zinc Chemical compound [Zn].[Pb] JQJCSZOEVBFDKO-UHFFFAOYSA-N 0.000 description 1
- 208000020442 loss of weight Diseases 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000320 mechanical mixture Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- DOTMOQHOJINYBL-UHFFFAOYSA-N molecular nitrogen;molecular oxygen Chemical compound N#N.O=O DOTMOQHOJINYBL-UHFFFAOYSA-N 0.000 description 1
- 238000004663 powder metallurgy Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
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- Powder Metallurgy (AREA)
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
Abstract
The invention discloses a kind of preparation method of iron-based prealloy powder, the steps include: 1) preparation iron-based reguline metal, Fe content 30wt% ~ 90wt%, Cu content 10wt% ~ 70wt%, fusing point is no more than 1800 DEG C; 2) process of melting water atomization pulverization is carried out to metal, obtain iron-based prealloyed powder; 3) powder after process is dried; 4) atomized powder is after oven dry, and add low-melting-point metal elemental powders, fusing point is no more than 500 DEG C, and its content is no more than 15wt%; 5) metal powder with low melting point mixes with oven dry powder; 6) utilize reduction furnace to do reduction treatment to mixed powder, hydrogen flowing quantity controls at 20m3/h ~ 30m3/h, and the recovery time is not less than 2h; 7) bulky grain is removed in screening, obtains iron-based prealloy powder.Easy to implement the method, easy and simple to handle, by High temperature diffusion, evaporation-condensation principle in reduction process, produce Zn content 2% ~ 15% iron-based prealloy powder, it is low that it has oxygen content, and preparation method is simple, cold moudling is good.
Description
Technical field
The present invention relates to diamond matrix Material Field, be specifically related to a kind of preparation method of iron-based prealloy powder, be applicable in Diamond Tools Industry, in diamond iron-based prealloy powder, low melting point element adds.
Technical background
Prealloy powder is defined as: a kind of metal powder is made up of two kinds or more element, and these elements are merged completely by mechanical means or other means.In iron-based prealloy powder preparation process, zinc lead waits in low-melting-point metal wet-layer preparation and not easily adds because not reducing after being very easily oxidized, being oxidized, present stage is all adopt simple substance powder to add, and in dry production process, because these metal boiling points are lower, in fusion process, volatilization is serious, also be very easily oxidized simultaneously, can not add, low-melting-point metal has segregation phenomena in diamond tool makes, and simultaneously it easily runs off in diamond tool sintering process.
Tradition diamond tool is produced mainly through mechanical mixture simple substance powder, along with the development of technology, the present stage production of diamond tool enters with the production model of simple substance powder mixing prealloy powder completely, should not add the low boiling elements such as Zn, Pb in the pre-alloyed process of these simple substance powder.Diamond tool iron-based prealloy powder is produced in water atomization, and the low-melting-point metal such as zinc, lead adds difficulty, and the application postscript of these elements in diamond tool it is extensive.Current water atomization is produced prealloyed powder for diamond tools and be there is following shortcoming
1) cold moudling ability;
2) metal such as Zn, Pb adds difficulty, mainly at present adds with simple substance powder, its skewness, and product stability is poor;
3) sintering process is more complicated, needs at high temperature to carry out diffusion-alloying, and it is wayward then just to enter sintering stage sintering temperature;
4) powder size needs strict control;
5) in sintering process, loss is large.
Summary of the invention
The object of the invention is the preparation method that there are provided a kind of iron-based prealloy powder, easy to implement the method, easy and simple to handle, based on water atomization iron-based prealloy powder, by High temperature diffusion, evaporation-condensation principle in reduction process, produce Zn content 2% ~ 15% iron-based prealloy powder, the advantages such as it is low that it has oxygen content, and processing performance is superior, preparation method is simple, cold moudling is good.
In order to realize above-mentioned object, the present invention adopts following technical measures:
A preparation method for iron-based prealloy powder, the steps include:
1) prepare iron-based prealloy powder, comprise following composition: Fe content 30wt% ~ 90wt%, Cu content 10wt% ~ 70wt%, all the other metals add arbitrarily, and fusing point is no more than 1800 DEG C;
2) atomization plant is utilized to carry out water atomization process to the powder of above-mentioned preparation;
3) vacuum desiccator is to step 2) process after powder dry, bake out temperature controls at 150 ~ 200 DEG C, and drying time controls at 2 ~ 4h;
4) atomized powder is after oven dry, and add low-melting-point metal elemental powders, fusing point is no more than 500 DEG C, and its content is no more than 15wt%;
5) metal powder with low melting point mixes with oven dry powder;
6) utilize reduction furnace to do reduction treatment to mixed powder, reduction temperature is 400 ~ 800 DEG C, and hydrogen flowing quantity controls at 20m
3/ h ~ 30m
3/ h, the recovery time can not lower than 2h;
7) screening removes bulky grain, iron-based prealloy powder.
All the other metals described in step 1) are one in Co, Ni, Sn or 2 to 3 kinds of any combination.
Described low-melting-point metal is zinc or lead.
In step 7), screening uses-200 mesh sieve.
The present invention mainly adds the low boiling elements such as Zn, Pb in prealloy powder, make the low boiling elements such as Zn, Pb melt with prealloy powder completely, form a kind of New Pre alloyed powder containing Zn, Pb, its performance characteristics compared with prior art, has the following advantages and effect:
1) cold moudling ability is good;
2) Elemental redistribution such as Zn, Pb is even, and product is stablized;
3) sintering process is simple, easily controls;
4) powder size claimed range is wide, does not need strict Control granularity;
5) lose in sintering process little.
Detailed description of the invention
Embodiment 1:
For a better understanding of the present invention, illustrate content of the present invention further below in conjunction with embodiment, a kind of preparation method of iron-based prealloy powder, the steps include:
1) prealloy powder is prepared in water atomization, constituent content in alloyed powder: Fe mass percentage is 30% or 40% or 60% or 90%, Cu mass percentage is 10% or 40% or 55% or 70%, all the other add Co arbitrarily, Ni, Sn metallic element, preparation 100 ~ 200kg, fusing point is no more than 1800 DEG C, and the water atomization complete set of equipments adopting Handan blue moral powder by atomization equipment Co., Ltd to produce prepares iron-based prealloy powder;
2) utilize SZG series double cone rotating vacuum drier to carry out drying and processing to prealloy powder, bake out temperature is
150 DEG C or 180 DEG C or 200 DEG C, drying time is 2h or 3h or 4h;
3) low melting point simple substance zinc metal dust mixes with oven dry powder;
4) utilize RDTQ-20-8 model reduction furnace to do reduction treatment to mixed powder, reduction temperature is 400 or 450 or 500 or 560 or 610 or 670 or 720 or 780 or 800 DEG C, and hydrogen flowing quantity is 20m
3/ h or 25m
3/ h or 30m
3/ h, the recovery time is 2h or 2.5h;
5) adopt the screening of XF triple unit vibration screen to remove bulky grain, obtain-200 order prealloy powder meeting demand.
The present invention, according to principles such as diffusion, evaporation-condensations, is prepared.Invention preparation three kinds of powder as detection contrast test, in table 1:
Table 1
Take elemental powders Zn to mix with prealloy powder equally, test specimen as a comparison, the composition of pre-alloyed powder is:
Table 2
No. 1 powder and the zinc powder adding 10%, obtain No. 1 premixing flour;
No. 2 powder and the zinc powder adding 8%, obtain No. 2 premixing flour;
No. 1 powder and the zinc powder adding 12%, obtain No. 3 premixing flour;
Its method of testing and comparing result as described below:
Diamond tool powder, the performance of its oxygen content to carcass has important effect, in the present invention, adopts RO-306 nitrogen oxygen analyzer to measure oxygen content.
Table 3
Therefore oxygen content in power of the present invention is obviously better than premixed powder.
Utilize abrasion test to carry out measuring the green strength of carcass, namely forming ability, concrete mode is the pressure adopting 35mpa, and 10mm is high in compacting, and diameter is the cylinder of 10mm, and putting into the gap of thin Fe silk establishment is 1mm
2prototype rotary barrel in (long 92mm, diameter is 95mm), with the speed of 1200 turns rotate 12min, using the loss of weight as intensity index, wear intensity account form is as follows:
The cold press compacting appearance and size adopting the Changjiang river Seiko to produce is 55x10x10mm
3caking, pressing pressure is 80Mpa, carries out wear test:
Table 4
As can be seen here, green strength is obviously strengthened, and the inventive method is produced its forming ability of powder and is better than premixed powder.
In powder metallurgy, an important index is the sintering reaction performance of metal dust, and good sintering character is exactly that powder can reach higher density at a lower temperature or at short notice.The powder that sintering character is good, its minimum sintering temperature is not preferably higher than 850 DEG C, and high sintering temperature can cause the reduction in sintered body life-span, and diamond carbonization comes off and high energy consumption.A good index of agglutinating property is the raising of its relative density, its relative density at least should arrive solid density 96% or higher, its account form:
Appearance and size is 55x10x10mm
3clavate complex in graphite grinding tool, carry out hot pressed sintering 1min, temperature is 820 DEG C, and pressure is 35mpa, measure density, its result is as table 5:
Table 5
As can be seen here, the powder that the inventive method is produced, its density and sintering character obviously increase.
During diamond tool is produced, most hardness all adopts Rockwell hardness to carry out the test of hardness, tests according to GB/T230-91 standard.Appearance and size is 55x10x10mm
3clavate complex in graphite grinding tool, carry out hot pressed sintering 1min, temperature is 820 degrees Celsius, and pressure is 35mpa, measure hardness, result is as table 6:
Table 6
According to hardness determination, its hardness difference is substantially little, and its hardness number is applicable to the demand of diamond tool;
Mass loss in diamond tool sintering process is called diamond tool flow, and powder mass flow of the present invention obviously reduces, as shown in table 7, and this also describes sintering character simultaneously and stablizes.
Appearance and size is 55x10x10mm
3clavate complex in graphite grinding tool, carry out hot pressed sintering 1min, temperature is 820 degrees Celsius, and pressure is 35mpa, measurement quality lose: result is as table 7:
Table 7
As seen from the above table: sintering loss, obviously reduce, further illustrating sintering stability increases.
Claims (2)
1. a preparation method for iron-based prealloy powder, the steps include:
1) iron-based reguline metal is prepared, comprise following composition: Fe content 30wt% ~ 90wt%, Cu content 10wt% ~ 70wt%, the one in Co, Ni, Sn or 2 to 3 kinds are combined not limited content to be added, additive fusing point is not higher than 1800 DEG C, and additive boiling point is not less than 1800 DEG C;
2) process of melting water atomization pulverization is carried out to the metal of above-mentioned preparation, obtain iron-based prealloy atomized powder;
3) to step 2) process after iron-based prealloy atomized powder dry, bake out temperature controls at 150 ~ 200 DEG C, and drying time is 2 ~ 4h;
4) atomized powder is after oven dry, and add low boiling metal simple-substance zinc or lead powder end, additive boiling point is not higher than 1800 DEG C, and its content is no more than 15wt%;
5) low boiling metal simple-substance zinc or lead powder end mix with oven dry powder;
6) utilize reduction furnace to do reduction treatment to mixed powder, reduction temperature is 400 ~ 800 DEG C, and hydrogen flowing quantity controls at 20m3/h ~ 30m3/h, and the recovery time is not less than 2h;
7) bulky grain is removed in screening, obtains iron-based prealloy powder.
2. the preparation method of a kind of iron-based prealloy powder as claimed in claim 1, is characterized in that: sieve use 200 mesh sieve in described step 7).
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| CN118007030A (en) * | 2024-01-31 | 2024-05-10 | 江门市宏佳新材料科技有限公司 | Iron-based prealloyed powder for diamond tool and preparation method thereof |
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Free format text: CORRECT: APPLICANT; FROM: HUBEI E-XIN DIAMOND MATERIAL CO., LTD. TO: HUBEI EXIN DIAMOND TECHNOLOGY CO., LTD. |
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| C14 | Grant of patent or utility model | ||
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Address after: 436000 Diamond Industrial Park 188 Edong Avenue, Ezhou City, Hubei Province Patentee after: Believe diamond new material limited liability company in Hubei Province Address before: 436000 Diamond Industrial Park 188 Edong Avenue, Ezhou City, Hubei Province Patentee before: HUBEI EXIN DIAMOND TECHNOLOGY Co.,Ltd. |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
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Denomination of invention: A kind of preparation method of iron-based pre-alloyed powder Effective date of registration: 20220815 Granted publication date: 20160316 Pledgee: Bank of China Limited Ezhou branch Pledgor: Believe diamond new material limited liability company in Hubei Province Registration number: Y2022420000257 |