CN108746611A - A kind of low-temperature sintering method of high-performance Fe-based powder metallurgy parts - Google Patents
A kind of low-temperature sintering method of high-performance Fe-based powder metallurgy parts Download PDFInfo
- Publication number
- CN108746611A CN108746611A CN201810614427.9A CN201810614427A CN108746611A CN 108746611 A CN108746611 A CN 108746611A CN 201810614427 A CN201810614427 A CN 201810614427A CN 108746611 A CN108746611 A CN 108746611A
- Authority
- CN
- China
- Prior art keywords
- powder
- parts
- mold
- temperature
- performance
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000004663 powder metallurgy Methods 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000009766 low-temperature sintering Methods 0.000 title claims abstract description 26
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 77
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 58
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 58
- 239000001257 hydrogen Substances 0.000 claims abstract description 58
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 36
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 24
- 239000000843 powder Substances 0.000 claims abstract description 23
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000010936 titanium Substances 0.000 claims abstract description 19
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 19
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 18
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims abstract description 18
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims abstract description 18
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 18
- 235000013312 flour Nutrition 0.000 claims abstract description 18
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 18
- 239000010439 graphite Substances 0.000 claims abstract description 18
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 18
- 235000015895 biscuits Nutrition 0.000 claims abstract description 17
- 239000011812 mixed powder Substances 0.000 claims abstract description 13
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 claims abstract description 11
- 239000002994 raw material Substances 0.000 claims abstract description 8
- 239000003595 mist Substances 0.000 claims abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 6
- 238000005303 weighing Methods 0.000 claims abstract description 6
- 230000008676 import Effects 0.000 claims description 31
- 238000005245 sintering Methods 0.000 claims description 18
- 238000000748 compression moulding Methods 0.000 claims description 8
- 238000001816 cooling Methods 0.000 claims description 5
- 230000000694 effects Effects 0.000 claims description 5
- 238000004880 explosion Methods 0.000 claims description 5
- 229910001220 stainless steel Inorganic materials 0.000 claims description 5
- 239000010935 stainless steel Substances 0.000 claims description 5
- 239000010721 machine oil Substances 0.000 claims description 4
- 238000003825 pressing Methods 0.000 claims description 3
- 235000013399 edible fruits Nutrition 0.000 claims 1
- 238000005461 lubrication Methods 0.000 claims 1
- 229910052710 silicon Inorganic materials 0.000 claims 1
- 239000010703 silicon Substances 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 229910052742 iron Inorganic materials 0.000 description 7
- 241000238876 Acari Species 0.000 description 4
- 230000008901 benefit Effects 0.000 description 4
- 229910052802 copper Inorganic materials 0.000 description 4
- 239000010949 copper Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000000314 lubricant Substances 0.000 description 4
- 239000002105 nanoparticle Substances 0.000 description 4
- 239000012255 powdered metal Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 239000002245 particle Substances 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000005272 metallurgy Methods 0.000 description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 235000002918 Fraxinus excelsior Nutrition 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 238000002679 ablation Methods 0.000 description 1
- 239000002956 ash Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 235000013339 cereals Nutrition 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 239000004482 other powder Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/10—Sintering only
- B22F3/1003—Use of special medium during sintering, e.g. sintering aid
- B22F3/1007—Atmosphere
-
- B22F1/0003—
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
- B22F2998/10—Processes characterised by the sequence of their steps
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2999/00—Aspects linked to processes or compositions used in powder metallurgy
Abstract
The invention discloses a kind of low-temperature sintering methods of high-performance Fe-based powder metallurgy parts, include the following steps：S1, the raw material for weighing following parts by weight；S2, it is uniformly coated with one layer of zinc stearate powder on the surface of mold, and mold is sintered；S3, iron powder is atomized using high-pressure water mist, atomized iron powder, copper powder is added in atomized iron powder, titanium valve, silica flour, graphite, nickel powder, molybdenum powder and chromium powder are uniformly mixed, form mixed-powder, mixed-powder is put into mold and is pressed, and form biscuit；S4, hydrogen furnace is powered on so that the temperature in 5 areas Ge Lu in hydrogen furnace reaches scheduled temperature value；The low-temperature sintering of S5, biscuit.The present invention, by being sintered one layer of zinc stearate powder on the surface of mold, it is possible to reduce the frictional force between compacting object and mold will not impact the performance of part, substantially increase the efficiency of taking-up, reduce the production time, improve throughput rate.
Description
Technical field
The present invention relates to a kind of low temperature of powder metallurgical technology more particularly to high-performance Fe-based powder metallurgy parts burnings
Knot method.
Background technology
In recent years, the technology and economic advantages of powder metallurgical technique were increasingly approved by people, powder metallurgy machinery
The purposes of part is also increasingly wider, and market coverage face is also more and more wider；Especially the demand of iron-based powder metallurgy parts with
The development of auto industry and be continuously increased, however traditional iron-based powder metallurgy parts are since it is sintered at high temperature, waste energy
Source, loss equipment, cause certain environmental pollution, with the development of science and technology and social progress, energy saving to be had become with environmentally friendly
The theme of the modern life, therefore how on the premise of ensuring performance, reduce the sintering temperature of powder metallurgy product, be gradually
People are of interest, and sintering is the most important link of powder metallurgical technique, and the purpose is to make to generate metallurgy between powder particle
In conjunction with even if the crystal boundary being transformed between atom by mechanical engagement between powder particle combines；The variation of energy after before sintering
It is pressed for △ U=U burnings-U, wherein U burnings are the interior energy of material after sintering, and U pressures are the interior energy of green compact；Because the interior energy of sintered body is less than
The interior energy of green compact, so △ U are negative value, △ U are exactly the driving force being sintered；△ U come from the surface energy and powder of powder particle
Intragranular distortion energy has prodigious interior energy in powder compact, and powder compact is in very unstable for thermodynamically
Fixed state, when interior energy height to certain degree will occur to be sintered automatically, so-called spontaneous combustion is exactly to be driven by the interior energy of body of powder
Automatic sintering phenomenon is moved, but under normal circumstances, the interior energy of system is not enough to driving sintering and carries out, so requiring heat to a certain
Temperature can be just sintered, this is why the reason of carrying out high temperature sintering.In the China of publication number CN102114542B
In a kind of low-temperature sintering method of high-performance Fe-based powder metallurgy parts of patent, the higher surface energy of copper nanoparticle is taken full advantage of
And low fusing point, in low-temperature sintering, the liquid phase that copper nanoparticle first melts formation is filled into the hole between ferrous powder granules,
Surface energy high possessed by copper nanoparticle is also that copper atom spreads and provides driving force simultaneously, therefore can be in low-temperature sintering
Reach the performance needed for part；Meanwhile the mixed powder time appropriate can effectively make copper nanoparticle, releasing agent and matrix powder
Uniform mixing, ensure that the uniformity of composition；It is close that pressing pressure appropriate and dwell time can obtain larger compacting
Degree, but is added to zinc stearate in iron powder, and zinc stearate cannot complete ablation, some cigarette ashes and inorganic residual can be left
Slag, these residues prevent the fully and uniformly sintering between iron-based grains, lead to unfavorable pore structure, are burnt to reduce
Tie the performance of part.
Therefore, we have proposed a kind of low-temperature sintering methods of high-performance Fe-based powder metallurgy parts for solving above-mentioned ask
Topic.
Invention content
The purpose of the present invention is to solve stripping rates in the prior art slowly and energy consumption consumes big disadvantage, and proposition
A kind of low-temperature sintering method of high-performance Fe-based powder metallurgy parts.
A kind of low-temperature sintering method of high-performance Fe-based powder metallurgy parts, includes the following steps：
S1, the raw material for weighing following parts by weight：800-1000 parts of iron powder, 1-2 parts of copper powder, 2-3 parts of titanium valve, 5-8 parts of silica flour,
20-50 parts of 3-5 parts of graphite, 100-150 parts of nickel powder, 2-3 parts of molybdenum powder and chromium powder；
S2, it is uniformly coated with one layer of zinc stearate powder on the surface of mold, and mold is sintered, the mould that will be sintered
It is spare after tool is cooled to room temperature；
S3, iron powder is atomized using high-pressure water mist, atomized iron powder, is added copper powder in atomized iron powder, titanium valve,
Silica flour, graphite, nickel powder, molybdenum powder and chromium powder are uniformly mixed, and form mixed-powder, mixed-powder is put into mold and is pressed into
Type forms biscuit；
S4, hydrogen furnace is powered on so that the temperature in 5 areas Ge Lu in hydrogen furnace reaches scheduled temperature value, 5 stoves
Area is respectively 500 DEG C, 800 DEG C, 850 DEG C, 700 DEG C and 500 DEG C from import fire door to temperature of the outlet fire door in sintering process；
The low-temperature sintering of S5, biscuit：The ignition switch at hydrogen furnace import fire door will be pressed, by hydrogen light rear pull-up into
Mouth fire door, mold and biscuit are ajusted and are placed on import stove gate, and the import fire door of hydrogen furnace is closed, in the mistake of propeller operation
Mold is pushed in journey, and mold constantly proceeds to outlet fire door in hydrogen furnace from import fire door, when mold proceeds to
When exporting at fire door, the ignition switch exported at fire door is pressed, outlet fire door is opened after hydrogen is lighted, uses stainless steel hook
Son ticks mold outside hydrogen furnace, and it is high-performance Fe-based powder metallurgy parts to take out the article in mold after cooling.
Preferably, the raw material includes the ratio of following parts by weight：900 parts of iron powder, 2 parts of copper powder, 2 parts of titanium valve, silica flour 7
35 parts of part, 4 parts of graphite, 130 parts of nickel powder, 3 parts of molybdenum powder and chromium powder.
Preferably, a diameter of 40um-50um of the iron powder, a diameter of 80nm-100 nm of copper powder, titanium valve it is a diameter of
120nm-140nm, a diameter of 90nm-100nm of silica flour, a diameter of 60um-80um of graphite, a diameter of 70um- of nickel powder
80um, a diameter of 40um-60um of molybdenum powder and a diameter of 90um-100um of chromium powder.
Preferably, the temperature of the mold sintering is 800 DEG C -850 DEG C, and the time of mold sintering is 3h-4h.
Preferably, the pressing pressure of the compression moulding is 1500MPa, and the dwell time of compression moulding is 3min, compacting
Molding temperature is 850 DEG C.
Preferably, the temperature in the 1st stove area of the hydrogen furnace must be at 450 DEG C -550 DEG C, the temperature in the 3rd areas Ge Lu of hydrogen furnace
900 DEG C are necessarily less than, the temperature in the 5th stove area of hydrogen furnace must be at 500 DEG C -600 DEG C, and residence time of the mold in 5 areas Ge Lu divides
It Wei not 2h, 2.5h, 4h, 2.5h, 2h.
Preferably, the import fire door and outlet fire door are forbidden to open simultaneously during being sintered, in order to avoid air
The generation that sets off an explosion is immersed in stove, and the propeller is made of lead screw and pushing ram, and propeller needs the machine of addition in two days
Oil, for ensuring lubricant effect.
Preferably, the density of the high-performance Fe-based powder metallurgy parts is 7.3g/cm3-7.6 g/cm3。
The beneficial effects of the invention are as follows：
1, of the invention, by being sintered one layer of zinc stearate powder on the surface of mold, it is possible to reduce compacting object and mold it
Between frictional force, and zinc stearate is adsorbed on the surface of mold, will not be caused to the performance of high-density iron-base powdered metal parts
It influences, substantially increases high-density iron-base powdered metal parts in the efficiency being removed from the molds, reduce the production time, improve
Throughput rate.
2, of the invention, by adding copper powder, titanium valve and silica flour in iron powder, high-performance iron based powders smelting can be significantly reduced
Temperature of the metal parts in sintering process can reduce the loss of hydrogen furnace, improve production efficiency, while extending production again and setting
Standby service life, reduces production cost, improves Social benefit and economic benefit.
3, of the invention, by adding other powder in the feed, the close of high-density iron-base powdered metal parts can be improved
Degree, hardness, wearability and corrosion resistance, greatly enhance the mechanical property of product, improve the market competitiveness of product.
4, of the invention, simple production process, processing efficient obtains highdensity iron-based using prior powder metallurgy technique
Powdered metal parts, it is cost-effective, it is suitable for industrialization large-scale production and application.
Specific implementation mode
The present invention is made further to explain with reference to specific embodiment.
Embodiment one
A kind of low-temperature sintering method of high-performance Fe-based powder metallurgy parts, includes the following steps：
S1, the raw material for weighing following parts by weight：800 parts of iron powder (a diameter of 40um of iron powder), 1 part of copper powder (copper powder it is straight
Diameter is 80nm), 2 parts of titanium valve (a diameter of 120nm of titanium valve), 5 parts of silica flour (a diameter of 90nm of silica flour), 3 parts of graphite be (graphite
A diameter of 80um), 100 parts of nickel powder (a diameter of 80um of nickel powder), 20 parts of 2 parts of molybdenum powder (a diameter of 40um of molybdenum powder) and chromium powder
(a diameter of 100um of chromium powder)；
S2, it is uniformly coated with one layer of zinc stearate powder on the surface of mold, and temperature in use is 800 DEG C and is carried out to mold
It is sintered 3h, it is spare after the mold sintered is cooled to room temperature；
S3, iron powder is atomized using high-pressure water mist, atomized iron powder, is added copper powder in atomized iron powder, titanium valve,
Silica flour, graphite, nickel powder, molybdenum powder and chromium powder are uniformly mixed, and form mixed-powder, and mixed-powder is put into mold and is carried out in pressure
For 1500MPa, temperature is compression moulding 3min under conditions of 850 DEG C, forms biscuit；
S4, hydrogen furnace is powered on so that the temperature in 5 areas Ge Lu in hydrogen furnace reaches scheduled temperature value, 5 stoves
Area is respectively 500 DEG C, 800 DEG C, 850 DEG C, 700 DEG C and 500 DEG C from import fire door to temperature of the outlet fire door in sintering process,
The temperature in the 1st stove area of hydrogen furnace must be at 450 DEG C -550 DEG C, and the temperature in the 3rd areas Ge Lu of hydrogen furnace is necessarily less than 900 DEG C, hydrogen
The temperature in the 5th stove area of stove must be at 500 DEG C -600 DEG C, and residence time of the mold in 5 areas Ge Lu is respectively 2h, 2.5h, 4h,
2.5h, 2h；
The low-temperature sintering of S5, biscuit：The ignition switch at hydrogen furnace import fire door will be pressed, by hydrogen light rear pull-up into
Mouth fire door, mold and biscuit are ajusted and are placed on import stove gate, the import fire door of hydrogen furnace are closed, in propeller (propeller
Be made of lead screw and pushing ram, and propeller need two days addition machine oil, for ensuring lubricant effect) operation during
Mold is pushed, and mold constantly proceeds to outlet fire door in hydrogen furnace from import fire door, when mold proceeds to outlet
When at fire door, the ignition switch exported at fire door is pressed, outlet fire door is opened after hydrogen is lighted, it will using stainless steel hook
Mold ticks hydrogen furnace, and outer (import fire door and outlet fire door are forbidden to open simultaneously during being sintered, in order to avoid air soaks
Enter the generation that sets off an explosion in stove), it is high-performance Fe-based powder metallurgy parts to take out the article in mold after cooling.
Embodiment two
A kind of low-temperature sintering method of high-performance Fe-based powder metallurgy parts, includes the following steps：
S1, the raw material for weighing following parts by weight：1000 parts of iron powder (a diameter of 40um of iron powder), 2 parts of copper powder (copper powder it is straight
Diameter is 100nm), 3 parts of titanium valve (a diameter of 140nm of titanium valve), 8 parts of silica flour (a diameter of 100nm of silica flour), 5 parts of (graphite of graphite
A diameter of 80um), 150 parts of nickel powder (a diameter of 70um of nickel powder), 3 parts of molybdenum powder (a diameter of 60um of molybdenum powder) and chromium powder 50
Part (a diameter of 90um of chromium powder)；
S2, it is uniformly coated with one layer of zinc stearate powder on the surface of mold, and temperature in use is 850 DEG C and is carried out to mold
It is sintered 3h, it is spare after the mold sintered is cooled to room temperature；
S3, iron powder is atomized using high-pressure water mist, atomized iron powder, is added copper powder in atomized iron powder, titanium valve,
Silica flour, graphite, nickel powder, molybdenum powder and chromium powder are uniformly mixed, and form mixed-powder, and mixed-powder is put into mold and is carried out in pressure
For 1500MPa, temperature is compression moulding 3min under conditions of 850 DEG C, forms biscuit；
S4, hydrogen furnace is powered on so that the temperature in 5 areas Ge Lu in hydrogen furnace reaches scheduled temperature value, 5 stoves
Area is respectively 500 DEG C, 800 DEG C, 850 DEG C, 700 DEG C and 500 DEG C from import fire door to temperature of the outlet fire door in sintering process,
The temperature in the 1st stove area of hydrogen furnace must be at 450 DEG C -550 DEG C, and the temperature in the 3rd areas Ge Lu of hydrogen furnace is necessarily less than 900 DEG C, hydrogen
The temperature in the 5th stove area of stove must be at 500 DEG C -600 DEG C, and residence time of the mold in 5 areas Ge Lu is respectively 2h, 2.5h, 4h,
2.5h, 2h；
The low-temperature sintering of S5, biscuit：The ignition switch at hydrogen furnace import fire door will be pressed, by hydrogen light rear pull-up into
Mouth fire door, mold and biscuit are ajusted and are placed on import stove gate, the import fire door of hydrogen furnace are closed, in propeller (propeller
Be made of lead screw and pushing ram, and propeller need two days addition machine oil, for ensuring lubricant effect) operation during
Mold is pushed, and mold constantly proceeds to outlet fire door in hydrogen furnace from import fire door, when mold proceeds to outlet
When at fire door, the ignition switch exported at fire door is pressed, outlet fire door is opened after hydrogen is lighted, it will using stainless steel hook
Mold ticks hydrogen furnace, and outer (import fire door and outlet fire door are forbidden to open simultaneously during being sintered, in order to avoid air soaks
Enter the generation that sets off an explosion in stove), it is high-performance Fe-based powder metallurgy parts to take out the article in mold after cooling.
Embodiment three
A kind of low-temperature sintering method of high-performance Fe-based powder metallurgy parts, includes the following steps：
S1, the raw material for weighing following parts by weight：900 parts of iron powder (a diameter of 40um of iron powder), 2 parts of copper powder (copper powder it is straight
Diameter is 100nm), 2 parts of titanium valve (a diameter of 120nm of titanium valve), 7 parts of silica flour (a diameter of 90nm of silica flour), 4 parts of (graphite of graphite
A diameter of 80um), 130 parts of nickel powder (a diameter of 70um of nickel powder), 3 parts of molybdenum powder (a diameter of 40um of molybdenum powder) and chromium powder 35
Part (a diameter of 100um of chromium powder)；
S2, it is uniformly coated with one layer of zinc stearate powder on the surface of mold, and temperature in use is 850 DEG C and is carried out to mold
It is sintered 4h, it is spare after the mold sintered is cooled to room temperature；
S3, iron powder is atomized using high-pressure water mist, atomized iron powder, is added copper powder in atomized iron powder, titanium valve,
Silica flour, graphite, nickel powder, molybdenum powder and chromium powder are uniformly mixed, and form mixed-powder, and mixed-powder is put into mold and is carried out in pressure
For 1500MPa, temperature is compression moulding 3min under conditions of 850 DEG C, forms biscuit；
S4, hydrogen furnace is powered on so that the temperature in 5 areas Ge Lu in hydrogen furnace reaches scheduled temperature value, 5 stoves
Area is respectively 500 DEG C, 800 DEG C, 850 DEG C, 700 DEG C and 500 DEG C from import fire door to temperature of the outlet fire door in sintering process,
The temperature in the 1st stove area of hydrogen furnace must be at 450 DEG C -550 DEG C, and the temperature in the 3rd areas Ge Lu of hydrogen furnace is necessarily less than 900 DEG C, hydrogen
The temperature in the 5th stove area of stove must be at 500 DEG C -600 DEG C, and residence time of the mold in 5 areas Ge Lu is respectively 2h, 2.5h, 4h,
2.5h, 2h；
The low-temperature sintering of S5, biscuit：The ignition switch at hydrogen furnace import fire door will be pressed, by hydrogen light rear pull-up into
Mouth fire door, mold and biscuit are ajusted and are placed on import stove gate, the import fire door of hydrogen furnace are closed, in propeller (propeller
Be made of lead screw and pushing ram, and propeller need two days addition machine oil, for ensuring lubricant effect) operation during
Mold is pushed, and mold constantly proceeds to outlet fire door in hydrogen furnace from import fire door, when mold proceeds to outlet
When at fire door, the ignition switch exported at fire door is pressed, outlet fire door is opened after hydrogen is lighted, it will using stainless steel hook
Mold ticks hydrogen furnace, and outer (import fire door and outlet fire door are forbidden to open simultaneously during being sintered, in order to avoid air soaks
Enter the generation that sets off an explosion in stove), it is high-performance Fe-based powder metallurgy parts to take out the article in mold after cooling.
By embodiment one, the density of high-performance Fe-based powder metallurgy parts made of embodiment two and embodiment three is surveyed
Amount, measurement result are as shown in Table 1:
| Embodiment one | Embodiment two | Embodiment three | |
| Density (g/cm3) | 7.3 | 7.5 | 7.6 |
Table one：The density meter of high-performance Fe-based powder metallurgy parts
By the measurement result of table one it is found that high-performance iron based powders made of embodiment one, embodiment two and embodiment three
The density of metallurgy component is all higher than the density of high-performance Fe-based powder metallurgy parts common in the market.
By embodiment one, high-performance Fe-based powder metallurgy parts test made of embodiment two and embodiment three is apparent hard
Degree, relative sintered density, tensile strength and porosity, test result are as shown in Table 2：
| Embodiment one | Embodiment two | Embodiment three | |
| Apparent hardness (HVO) | 92.63 | 94.51 | 97.82 |
| Relative sintered density (%) | 92.3 | 93.1 | 93.7 |
| Tensile strength (MPa) | 1.62 | 1.63 | 1.67 |
| Porosity (%) | 8.32 | 7.94 | 7.68 |
Table two：The Mechanics Performance Testing table of high-performance Fe-based powder metallurgy parts
By the test result of table two it is found that embodiment one in the present invention, high-performance made of embodiment two and embodiment three
Iron-based powder metallurgy parts apparent hardness is big, and relative sintered density is high, and tensile strength is big, and porosity is low.
The result of table one and table two it is found that high-performance Fe-based powder metallurgy parts made of the present invention are had excellent performance,
In, embodiment three is highly preferred embodiment of the present invention.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Any one skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (8)
1. a kind of low-temperature sintering method of high-performance Fe-based powder metallurgy parts, which is characterized in that include the following steps：
S1, the raw material for weighing following parts by weight：800-1000 parts of iron powder, 1-2 parts of copper powder, 2-3 parts of titanium valve, 5-8 parts of silica flour, graphite
3-5 parts, 100-150 parts of nickel powder, 20-50 parts of 2-3 parts of molybdenum powder and chromium powder；
S2, it is uniformly coated with one layer of zinc stearate powder on the surface of mold, and mold is sintered, the mold sintered is cold
But spare to after room temperature；
S3, iron powder is atomized using high-pressure water mist, copper powder, titanium valve, silicon is added in atomized iron powder in atomized iron powder
Powder, graphite, nickel powder, molybdenum powder and chromium powder are uniformly mixed, and form mixed-powder, mixed-powder is put into mold and is pressed into
Type forms biscuit；
S4, hydrogen furnace is powered on so that the temperature in 5 areas Ge Lu in hydrogen furnace reaches scheduled temperature value, 5 areas Ge Lu from
Import fire door is respectively 500 DEG C, 800 DEG C, 850 DEG C, 700 DEG C and 500 DEG C to temperature of the fire door in sintering process is exported；
The low-temperature sintering of S5, biscuit：The ignition switch at hydrogen furnace import fire door will be pressed, hydrogen is lighted into rear pull-up import stove
Door, mold and biscuit are ajusted and are placed on import stove gate, the import fire door of hydrogen furnace are closed, during propeller is run
Mold is pushed, and mold constantly proceeds to outlet fire door in hydrogen furnace from import fire door, when mold proceeds to outlet
When at fire door, the ignition switch exported at fire door is pressed, outlet fire door is opened after hydrogen is lighted, it will using stainless steel hook
Mold is ticked outside hydrogen furnace, and it is high-performance Fe-based powder metallurgy parts to take out the article in mold after cooling.
2. a kind of low-temperature sintering method of high-performance Fe-based powder metallurgy parts according to claim 1, which is characterized in that
The raw material includes the ratio of following parts by weight：900 parts of iron powder, 2 parts of copper powder, 2 parts of titanium valve, 7 parts of silica flour, 4 parts of graphite, nickel powder
130 parts, 35 parts of 3 parts of molybdenum powder and chromium powder.
3. a kind of low-temperature sintering method of high-performance Fe-based powder metallurgy parts according to claim 1, which is characterized in that
A diameter of 40um-50um of the iron powder, a diameter of 80nm-100nm of copper powder, a diameter of 120nm-140nm of titanium valve, silica flour
A diameter of 90nm-100nm, a diameter of 60um-80um of graphite, a diameter of 70um-80um of nickel powder, molybdenum powder it is a diameter of
A diameter of 90um-100um of 40um-60um and chromium powder.
4. a kind of low-temperature sintering method of high-performance Fe-based powder metallurgy parts according to claim 1, which is characterized in that
The temperature of the mold sintering is 800 DEG C -850 DEG C, and the time of mold sintering is 3h-4h.
5. a kind of low-temperature sintering method of high-performance Fe-based powder metallurgy parts according to claim 1, which is characterized in that
The pressing pressure of the compression moulding is 1500MPa, and the dwell time of compression moulding is 3min, and the temperature of compression moulding is 850
℃。
6. a kind of low-temperature sintering method of high-performance Fe-based powder metallurgy parts according to claim 1, which is characterized in that
The temperature in the 1st stove area of the hydrogen furnace must be at 450 DEG C -550 DEG C, and the temperature in the 3rd areas Ge Lu of hydrogen furnace is necessarily less than 900 DEG C,
The temperature in the 5th stove area of hydrogen furnace must be at 500 DEG C -600 DEG C, and residence time of the mold in 5 areas Ge Lu is respectively 2h, 2.5h, 4h,
2.5h, 2h.
7. a kind of low-temperature sintering method of high-performance Fe-based powder metallurgy parts according to claim 1, which is characterized in that
The import fire door and outlet fire door are forbidden to open simultaneously during being sintered, and set off an explosion in order to avoid air immerses in stove
Occur, the propeller is made of lead screw and pushing ram, and propeller needs the machine oil of addition in two days, for ensuring lubrication effect
Fruit.
8. a kind of low-temperature sintering method of high-performance Fe-based powder metallurgy parts according to claim 1, which is characterized in that
The density of the high-performance Fe-based powder metallurgy parts is 7.3g/cm3-7.6g/cm3。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810614427.9A CN108746611A (en) | 2018-06-14 | 2018-06-14 | A kind of low-temperature sintering method of high-performance Fe-based powder metallurgy parts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810614427.9A CN108746611A (en) | 2018-06-14 | 2018-06-14 | A kind of low-temperature sintering method of high-performance Fe-based powder metallurgy parts |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108746611A true CN108746611A (en) | 2018-11-06 |
Family
ID=64022557
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810614427.9A Pending CN108746611A (en) | 2018-06-14 | 2018-06-14 | A kind of low-temperature sintering method of high-performance Fe-based powder metallurgy parts |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108746611A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112692289A (en) * | 2020-12-24 | 2021-04-23 | 泰州市科诚汽车零配件有限公司 | Powder metallurgy processing technology for two-claw coupler for automobile |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1056832A (en) * | 1990-05-22 | 1991-12-11 | 杨洋 | The production technology of iron-based and iron-copper bi-metal products |
| CN1261553A (en) * | 2000-01-31 | 2000-08-02 | 山东工业大学 | Iron-base alloy catalyst and its preparing method |
| CN101579738A (en) * | 2009-06-30 | 2009-11-18 | 北京科技大学 | Double pressing molding method for preparing high-density powder metallurgical iron-base part |
| CN101875570A (en) * | 2010-03-31 | 2010-11-03 | 李锦桥 | Horizontal metalized hydrogen furnace |
| CN102114542A (en) * | 2011-03-23 | 2011-07-06 | 常州大学 | Low-temperature sintering method for high-performance Fe-based powder metallurgy parts |
| CN102773481A (en) * | 2012-05-08 | 2012-11-14 | 北京科技大学 | Method of improving performance of iron-based powder metallurgy parts prepared by high velocity compaction |
| CN103008667A (en) * | 2013-01-07 | 2013-04-03 | 北京科技大学 | Method for preparing high-density iron-base powder metallurgy parts |
| US20180015537A1 (en) * | 2016-07-18 | 2018-01-18 | Kenneth J. Reed | Method of producing metallic nano particle colloidal dispersions |
-
2018
- 2018-06-14 CN CN201810614427.9A patent/CN108746611A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1056832A (en) * | 1990-05-22 | 1991-12-11 | 杨洋 | The production technology of iron-based and iron-copper bi-metal products |
| CN1261553A (en) * | 2000-01-31 | 2000-08-02 | 山东工业大学 | Iron-base alloy catalyst and its preparing method |
| CN101579738A (en) * | 2009-06-30 | 2009-11-18 | 北京科技大学 | Double pressing molding method for preparing high-density powder metallurgical iron-base part |
| CN101875570A (en) * | 2010-03-31 | 2010-11-03 | 李锦桥 | Horizontal metalized hydrogen furnace |
| CN102114542A (en) * | 2011-03-23 | 2011-07-06 | 常州大学 | Low-temperature sintering method for high-performance Fe-based powder metallurgy parts |
| CN102773481A (en) * | 2012-05-08 | 2012-11-14 | 北京科技大学 | Method of improving performance of iron-based powder metallurgy parts prepared by high velocity compaction |
| CN103008667A (en) * | 2013-01-07 | 2013-04-03 | 北京科技大学 | Method for preparing high-density iron-base powder metallurgy parts |
| US20180015537A1 (en) * | 2016-07-18 | 2018-01-18 | Kenneth J. Reed | Method of producing metallic nano particle colloidal dispersions |
Non-Patent Citations (2)
| Title |
|---|
| 吴晓翔: "用氢氮混合气替代氢气保护气体的论证", 《洁净与空调技术》 * |
| 陈精康: "Φ60mm钨筒高温烧氢炉研制", 《光源与照明》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112692289A (en) * | 2020-12-24 | 2021-04-23 | 泰州市科诚汽车零配件有限公司 | Powder metallurgy processing technology for two-claw coupler for automobile |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101249562A (en) | Powder metallurgy prescription and technique | |
| CN102233425A (en) | Powder metallurgy formula and process | |
| CN100380537C (en) | Soft-magnetic composite material and process for making magnetic conduction component by using same | |
| CN102990065B (en) | The flap powder metallurgy manufacture method of check-valves | |
| CN107267854B (en) | The smelting process and product of a kind of high carbon ferro-chrome | |
| CN101555565B (en) | Process for producing vermicular cast iron by cupola-line frequency furnace duplex melting | |
| CN101733403A (en) | Process for manufacturing main drive inner core of gasoline economizer for motorcycle | |
| CN102560249A (en) | Formula and process for powder metallurgy | |
| CN104785772A (en) | Valve guide pipe and powder metallurgy production process thereof | |
| CN103231060B (en) | A kind of powder metallurgical helical gear and preparation method thereof | |
| CN103785824A (en) | Powder metallurgy friction pair for braking of heavy-load vehicle and preparation technology thereof | |
| CN105834440A (en) | Method for preparing high-permeability flaky soft magnetic alloy powder | |
| CN104759614A (en) | Belt pulley powder metallurgy formulation and process | |
| CN102094102A (en) | Method for casting nodular cast iron with large section | |
| CN103785836A (en) | Powder metallurgy process | |
| CN108746611A (en) | A kind of low-temperature sintering method of high-performance Fe-based powder metallurgy parts | |
| CN105414553A (en) | Valve seat ring and manufacturing method thereof | |
| CN103233166A (en) | Powder metallurgy sector gear and making method thereof | |
| CN102979938B (en) | Casting method of valve body of check valve | |
| CN102965571B (en) | Powder metallurgy method for pump body of hydraulic pump | |
| CN102989955B (en) | Precision die-forging and forming process for black box of airplane | |
| CN102974771A (en) | Casting forming preparation method of pressure reducing valve body | |
| CN103008642B (en) | The valve rod powder metallurgy manufacture method of check-valves | |
| CN108746589A (en) | A kind of preparation method of iron-based powder metallurgy parts | |
| CN102114542A (en) | Low-temperature sintering method for high-performance Fe-based powder metallurgy parts |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20181106 |
|
| RJ01 | Rejection of invention patent application after publication |