CN112338192A - High-low temperature resistant oil-retaining bearing made of powder metallurgy material and manufacturing method thereof - Google Patents
High-low temperature resistant oil-retaining bearing made of powder metallurgy material and manufacturing method thereof Download PDFInfo
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- CN112338192A CN112338192A CN202011054771.0A CN202011054771A CN112338192A CN 112338192 A CN112338192 A CN 112338192A CN 202011054771 A CN202011054771 A CN 202011054771A CN 112338192 A CN112338192 A CN 112338192A
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- 239000000463 material Substances 0.000 title claims abstract description 49
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 15
- 238000004663 powder metallurgy Methods 0.000 title claims abstract description 14
- 239000003921 oil Substances 0.000 claims abstract description 36
- 238000005245 sintering Methods 0.000 claims abstract description 31
- 238000002156 mixing Methods 0.000 claims abstract description 19
- 238000003825 pressing Methods 0.000 claims abstract description 16
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 12
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 12
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000004372 Polyvinyl alcohol Substances 0.000 claims abstract description 12
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims abstract description 12
- 235000003891 ferrous sulphate Nutrition 0.000 claims abstract description 12
- 239000011790 ferrous sulphate Substances 0.000 claims abstract description 12
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 claims abstract description 12
- 229910000359 iron(II) sulfate Inorganic materials 0.000 claims abstract description 12
- 229920002451 polyvinyl alcohol Polymers 0.000 claims abstract description 12
- 239000011135 tin Substances 0.000 claims abstract description 12
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 claims abstract description 12
- 238000000034 method Methods 0.000 claims abstract description 11
- 238000007654 immersion Methods 0.000 claims abstract description 10
- 239000010705 motor oil Substances 0.000 claims abstract description 10
- 230000001681 protective effect Effects 0.000 claims description 9
- 239000010721 machine oil Substances 0.000 claims description 8
- 238000012216 screening Methods 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 239000011812 mixed powder Substances 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- 238000011049 filling Methods 0.000 claims description 4
- 239000003034 coal gas Substances 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 2
- 239000000314 lubricant Substances 0.000 abstract description 4
- 238000005470 impregnation Methods 0.000 abstract description 3
- 238000005192 partition Methods 0.000 abstract 1
- KYWSCMDFVARMPN-LCSVLAELSA-N Saikosaponin D Chemical compound O([C@@H]1[C@@H](O)[C@H](O[C@@H]2[C@@]([C@H]3[C@]([C@@H]4[C@@]([C@@]5(C[C@@H](O)[C@]67CO[C@]5([C@@H]6CC(C)(C)CC7)C=C4)C)(C)CC3)(C)CC2)(C)CO)O[C@@H]([C@@H]1O)C)[C@@H]1O[C@H](CO)[C@@H](O)[C@H](O)[C@H]1O KYWSCMDFVARMPN-LCSVLAELSA-N 0.000 description 4
- 229930192014 saikosaponin Natural products 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 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
- B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
- B22F5/10—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of articles with cavities or holes, not otherwise provided for in the preceding subgroups
-
- 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
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/10—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material
-
- 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
- B22F3/02—Compacting only
-
- 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
- B22F3/02—Compacting only
- B22F3/03—Press-moulding apparatus therefor
-
- 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
-
- 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
- B22F3/1017—Multiple heating or additional 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
- 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
- B22F3/24—After-treatment of workpieces or articles
- B22F3/26—Impregnating
-
- 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
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
-
- 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
- C22C38/008—Ferrous alloys, e.g. steel alloys containing tin
-
- 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
- C22C38/16—Ferrous alloys, e.g. steel alloys containing copper
Abstract
The invention discloses a high and low temperature resistant oil-retaining bearing made of powder metallurgy material and a manufacturing method thereof, wherein the high and low temperature resistant oil-retaining bearing comprises iron powder, copper powder, graphite powder, zinc stearate, tin, polyvinyl alcohol, ferrous sulfate and No. 20 engine oil, and the specific steps comprise material mixing, pressing, partition sintering, temperature reduction and oil immersion, and the process can preheat the material at the early stage of sintering by respectively keeping sintering time of three temperature interval values and respective temperature interval values thereof at 650 ℃ for 30min, 850 ℃ for 40min and 1120 ℃ for 90min, and can well remove lubricant and adsorbed gas in a blank; the material which is recovered to normal temperature after sintering is placed in a vacuum box, the vacuum box is evacuated to-720 mm hg, then the No. 20 engine oil is poured into an oil impregnator, the oil impregnator is heated to 80 ℃, and then the temperature is kept for 30-35min, so that the oil and the material are better contacted and fused in the hot vacuum oil impregnator, and better oil impregnation work is completed.
Description
Technical Field
The invention discloses a high and low temperature resistant oil-retaining bearing made of a powder metallurgy material and a manufacturing method thereof, belonging to the technical field of bearing manufacturing.
Background
In the prior art, when a bearing with high and low temperature resistance is manufactured and sintered, the bearing is mostly sintered at two temperature interval values, and after a material product is pressed, the bearing directly enters a higher temperature interval value, so that the heat can not be uniformly transmitted to the whole body of the material product, and a lubricant and adsorbed gas in a blank can not be discharged; in the oil immersion process, normal-temperature oil and normal-temperature materials cannot be better contacted and fused in a normal-temperature vacuum oil immersion device, so that the oil immersion effect is poor.
Disclosure of Invention
The invention aims to solve the technical problems that most of the existing saikosaponin has low purity, the preparation process has more residual impurities, and some impurities are ignored in the extraction process, so that most of the saikosaponin on the market cannot sufficiently exert the effect of the saikosaponin, and provides a high-temperature and low-temperature resistant oil-containing bearing made of a powder metallurgy material and a preparation method of the saikosaponin, so that the problems are solved.
In order to achieve the purpose, the invention provides the following technical scheme: a powder metallurgy material made oil-retaining bearing of high and low temperature resistance and its preparation method, including iron powder, copper powder, graphite powder, zinc stearate, tin, polyvinyl alcohol, ferrous sulfate and No. 20 engine oil, the concrete step is:
(1) screening iron powder, copper powder, graphite powder, zinc stearate, tin, polyvinyl alcohol and ferrous sulfate, then intensively mixing through a V-shaped mixing barrel, and then adding a little No. 20 machine oil for mixing again;
(2) performing blank pressing on the mixed powder, wherein the pressing pressure is 6-7 tons/cm, the pressing die is made of Cr12MoV steel, the hardness HRC =55-60, and the smoothness is 8-9;
(3) sintering the pressed material, filling protective gas into the material, and performing sintering operation at three temperature intervals and at different time;
(4) stopping heating the sintering furnace, cooling the material in the sintering furnace at a certain speed until the temperature reaches 300-320 ℃, and pushing out the sintering furnace until the normal temperature state is recovered;
(5) and putting the material into a vacuum oil immersion device for oil immersion.
Preferably, the proportion of the iron powder, the copper powder, the graphite powder, the zinc stearate, the tin, the polyvinyl alcohol and the ferrous sulfate in the step (1) is 90-92%, 2-3%, 0.8%, 0.5%, 0.7% and 7%, the screening mesh number is-110 meshes, the initial mixing time is 2.8-3h, and 0.2% of No. 20 engine oil is added and mixed for 1 h.
Preferably, the inside of the container is filled with a protective gas according to the step (3), and the gas composition of the protective gas is 5-6 parts of air and 1 part of coal gas.
Preferably, the sintering time of the three temperature interval values and their respective temperature interval values according to the step (3) are respectively 600-650 ℃ for 30min, 750-850 ℃ for 40min and 1040-1120 ℃ for 90 min.
Preferably, the temperature reduction rate according to the step (4) is 10 ℃/1.2min, and the temperature reduction rate is maintained until the temperature is reduced to 550 ℃ and 600 ℃, and then the temperature is rapidly reduced at a rate of 20 ℃/1 min.
Preferably, the material which is recovered to normal temperature after sintering according to the step (5) is placed in a vacuum box, the vacuum box is evacuated to-720 mm hg, the machine oil No. 20 is poured into an oil impregnator, the oil impregnator is heated to 80 ℃, the temperature is kept for 30-35min, air can be released, and the material is taken out from the interior of the oil impregnator.
Preferably, the method of manufacture of claims 1-7 is used.
Compared with the prior art, the invention has the following beneficial effects:
the method comprises the following steps of screening iron powder, copper powder, graphite powder, zinc stearate, tin, polyvinyl alcohol and ferrous sulfate, then intensively mixing through a V-shaped mixing barrel, and then adding a little No. 20 machine oil for mixing again; the mixed powder is subjected to blank pressing, the pressing pressure is 6-7 tons/cm, a pressing die is made of Cr12MoV steel, the hardness HRC =55-60 and the smoothness is 8-9 ^, the pressed material is sintered, protective gas is filled into the material, sintering work is carried out in three temperature interval values and different time, the sintering furnace stops heating, the material is cooled in the sintering furnace at a certain speed until the temperature reaches 300-, the lubricant and adsorbed gas in the blank can be well discharged; the material which is recovered to normal temperature after sintering is placed in a vacuum box, the vacuum box is evacuated to-720 mm hg, then the No. 20 engine oil is poured into an oil impregnator, the oil impregnator is heated to 80 ℃, and then the temperature is kept for 30-35min, so that the oil and the material are better contacted and fused in the hot vacuum oil impregnator, and better oil impregnation work is completed.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
A powder metallurgy material made oil-bearing with high and low temperature resistance and its manufacturing method, comprising iron powder, copper powder, graphite powder, zinc stearate, tin, polyvinyl alcohol, ferrous sulfate and No. 20 engine oil, the concrete steps are:
(1) screening iron powder, copper powder, graphite powder, zinc stearate, tin, polyvinyl alcohol and ferrous sulfate, then intensively mixing through a V-shaped mixing barrel, and then adding a little No. 20 machine oil for mixing again;
(2) performing blank pressing on the mixed powder, wherein the pressing pressure is 6-7 tons/cm, the pressing die is made of Cr12MoV steel, the hardness HRC =55-60, and the smoothness is 8-9;
(3) sintering the pressed material, filling protective gas into the material, and performing sintering operation at three temperature intervals and at different time;
(4) stopping heating the sintering furnace, cooling the material in the sintering furnace at a certain speed until the temperature reaches 300-320 ℃, and pushing out the sintering furnace until the normal temperature state is recovered;
(5) and putting the material into a vacuum oil immersion device for oil immersion.
Specifically, according to the proportion of 90% -92%, 2% -3%, 0.8%, 0.5%, 0.7% and 7% of the iron powder, the copper powder, the graphite powder, the zinc stearate, the tin, the polyvinyl alcohol and the ferrous sulfate in the step (1), the screening mesh number is-110 meshes, the primary mixing time is 2.8-3h, and 0.2% of No. 20 engine oil is added and mixed for 1 h.
Specifically, according to the step (3), the protective gas is filled into the gas, and the gas comprises 5-6 parts of air and 1 part of coal gas.
Specifically, the sintering time according to the three temperature interval values and their respective temperature interval values in the step (3) is respectively 600-650 deg.C for 30min, 750-850 deg.C for 40min, and 1040-1120 deg.C for 90 min.
Specifically, the temperature reduction rate according to the step (4) is 10 ℃/1.2min, and the temperature reduction rate is maintained until the temperature is reduced to 550 ℃ and 600 ℃, and then the temperature is rapidly reduced at a rate of 20 ℃/1 min.
Specifically, the material which is sintered and recovered to normal temperature is placed in a vacuum box according to the step (5), the vacuum box is evacuated to-720 mm hg, the machine oil No. 20 is poured into an oil impregnator, the oil impregnator is heated to 80 ℃, the temperature is kept for 30-35min, air can be released, and the material is taken out from the interior of the oil impregnator.
Specifically, the method is produced by the production method according to claims 1 to 7.
Specifically, the method comprises the following steps of screening iron powder, copper powder, graphite powder, zinc stearate, tin, polyvinyl alcohol and ferrous sulfate, then intensively mixing through a V-shaped mixing barrel, and then adding a little No. 20 machine oil for mixing again; the mixed powder is subjected to blank pressing, the pressing pressure is 6-7 tons/cm, a pressing die is made of Cr12MoV steel, the hardness HRC =55-60 and the smoothness is 8-9 ^, the pressed material is sintered, protective gas is filled into the material, sintering work is carried out in three temperature interval values and different time, the sintering furnace stops heating, the material is cooled in the sintering furnace at a certain speed until the temperature reaches 300-, the lubricant and adsorbed gas in the blank can be well discharged; the material which is recovered to normal temperature after sintering is placed in a vacuum box, the vacuum box is evacuated to-720 mm hg, then the No. 20 engine oil is poured into an oil impregnator, the oil impregnator is heated to 80 ℃, and then the temperature is kept for 30-35min, so that the oil and the material are better contacted and fused in the hot vacuum oil impregnator, and better oil impregnation work is completed.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. A manufacturing method of a high and low temperature resistant oil-retaining bearing made of a powder metallurgy material is characterized by comprising iron powder, copper powder, graphite powder, zinc stearate, tin, polyvinyl alcohol, ferrous sulfate and No. 20 engine oil, and comprises the following specific steps:
(1) screening iron powder, copper powder, graphite powder, zinc stearate, tin, polyvinyl alcohol and ferrous sulfate, then intensively mixing through a V-shaped mixing barrel, and then adding a little No. 20 machine oil for mixing again;
(2) performing blank pressing on the mixed powder, wherein the pressing pressure is 6-7 tons/cm, the pressing die is made of Cr12MoV steel, the hardness HRC =55-60, and the smoothness is 8-9;
(3) sintering the pressed material, filling protective gas into the material, and performing sintering operation at three temperature intervals and at different time;
(4) stopping heating the sintering furnace, cooling the material in the sintering furnace at a certain speed until the temperature reaches 300-320 ℃, and pushing out the sintering furnace until the normal temperature state is recovered;
(5) and putting the material into a vacuum oil immersion device for oil immersion.
2. The method for manufacturing the high and low temperature resistant oil-impregnated bearing made of the powder metallurgy material according to claim 1, wherein: the proportion of the iron powder, the copper powder, the graphite powder, the zinc stearate, the tin, the polyvinyl alcohol and the ferrous sulfate in the step (1) is 90-92%, 2-3%, 0.8%, 0.5%, 0.7% and 7%, the screening mesh number is-110 meshes, the initial mixing time is 2.8-3h, 0.2% of No. 20 engine oil is added, and then the mixture is mixed for 1 h.
3. The method for manufacturing the high and low temperature resistant oil-impregnated bearing made of the powder metallurgy material according to claim 1, wherein: and (4) filling protective gas into the gas container according to the step (3), wherein the gas comprises 5-6 parts of air and 1 part of coal gas.
4. The method for manufacturing the high and low temperature resistant oil-impregnated bearing made of the powder metallurgy material according to claim 1, wherein: the sintering time of the three temperature intervals and their respective temperature intervals according to step (3) are respectively 600-650 deg.C for 30min, 750-850 deg.C for 40min and 1040-1120 deg.C for 90 min.
5. The method for manufacturing the high and low temperature resistant oil-impregnated bearing made of the powder metallurgy material according to claim 1, wherein: the temperature reduction rate according to the step (4) is 10 ℃/1.2min, and the temperature is maintained until the temperature is reduced to 550 ℃ and 600 ℃, and then the temperature is rapidly reduced at the rate of 20 ℃/1 min.
6. The method for manufacturing the high and low temperature resistant oil-impregnated bearing made of the powder metallurgy material according to claim 1, wherein: and (4) placing the material which is sintered and recovered to the normal temperature in the vacuum box according to the step (5), evacuating to-720 mm hg, pouring the machine oil No. 20 into an oil impregnator, heating the oil impregnator to 80 ℃, keeping for 30-35min, deflating, and taking out the material from the interior.
7. The high and low temperature resistant oil-impregnated bearing made of a powder metallurgy material according to claim 1, wherein: manufactured by the manufacturing method of claims 1-7.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011054771.0A CN112338192A (en) | 2020-09-30 | 2020-09-30 | High-low temperature resistant oil-retaining bearing made of powder metallurgy material and manufacturing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011054771.0A CN112338192A (en) | 2020-09-30 | 2020-09-30 | High-low temperature resistant oil-retaining bearing made of powder metallurgy material and manufacturing method thereof |
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| CN112338192A true CN112338192A (en) | 2021-02-09 |
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| CN202011054771.0A Pending CN112338192A (en) | 2020-09-30 | 2020-09-30 | High-low temperature resistant oil-retaining bearing made of powder metallurgy material and manufacturing method thereof |
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