CN110788332A - Powder metallurgy eccentric wheel for atomizer compression pump and preparation method thereof - Google Patents
Powder metallurgy eccentric wheel for atomizer compression pump and preparation method thereof Download PDFInfo
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- CN110788332A CN110788332A CN201911196067.6A CN201911196067A CN110788332A CN 110788332 A CN110788332 A CN 110788332A CN 201911196067 A CN201911196067 A CN 201911196067A CN 110788332 A CN110788332 A CN 110788332A
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- 230000006835 compression Effects 0.000 title claims abstract description 34
- 238000007906 compression Methods 0.000 title claims abstract description 34
- 238000004663 powder metallurgy Methods 0.000 title claims abstract description 30
- 238000002360 preparation method Methods 0.000 title claims abstract description 26
- 239000000843 powder Substances 0.000 claims abstract description 39
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 20
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 13
- 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
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000010439 graphite Substances 0.000 claims abstract description 11
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 11
- CADICXFYUNYKGD-UHFFFAOYSA-N sulfanylidenemanganese Chemical compound [Mn]=S CADICXFYUNYKGD-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000000463 material Substances 0.000 claims description 28
- 238000005245 sintering Methods 0.000 claims description 27
- 238000001816 cooling Methods 0.000 claims description 13
- 238000003825 pressing Methods 0.000 claims description 12
- 238000003756 stirring Methods 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 9
- 238000002156 mixing Methods 0.000 claims description 9
- 238000000465 moulding Methods 0.000 claims description 7
- 239000002994 raw material Substances 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 description 14
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 8
- 238000000748 compression moulding Methods 0.000 description 6
- 239000011812 mixed powder Substances 0.000 description 5
- 238000004321 preservation Methods 0.000 description 5
- 229910000997 High-speed steel Inorganic materials 0.000 description 4
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 4
- 239000000956 alloy Substances 0.000 description 4
- 238000005242 forging Methods 0.000 description 4
- 239000001257 hydrogen Substances 0.000 description 4
- 229910052739 hydrogen Inorganic materials 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 229910052757 nitrogen Inorganic materials 0.000 description 4
- 230000001681 protective effect Effects 0.000 description 4
- 239000010409 thin film Substances 0.000 description 4
- 238000003754 machining Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012360 testing method Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- 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
-
- B22F1/0003—
-
- 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
- B22F1/14—Treatment of metallic powder
-
- 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
- B22F3/10—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
- B22F3/1021—Removal of binder or filler
-
- 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
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- 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
- C22C38/08—Ferrous alloys, e.g. steel alloys containing nickel
-
- 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
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
-
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Powder Metallurgy (AREA)
Abstract
The invention provides a powder metallurgy eccentric wheel for an atomizer compression pump and a preparation method thereof, wherein the powder metallurgy eccentric wheel comprises the following raw materials: 92-93.4% of atomized iron powder, 0.8-1% of graphite, 2-2.3% of copper powder, 3-3.2% of nickel powder, 0.6-0.8% of molybdenum powder and 0.2-0.3% of manganese sulfide powder.
Description
Technical Field
The invention relates to the field of manufacturing of eccentric wheels of compression pumps of atomizers, in particular to a powder metallurgy eccentric wheel for the compression pump of the atomizers and a preparation method thereof.
Background
The eccentric wheel is the most important component in the compression pump of the atomizer, gas compression is carried out through the rotation of the eccentric wheel, and high-speed airflow is formed through the small pipe orifice, so that liquid drops are changed into mist-shaped particles to be sprayed out. The eccentric wheel of the compression pump of the conventional atomizer is composed of a convex handle (1), an eccentric wheel body (2) and a positioning groove (3) as shown in figure 1. Under the general condition, the convex handle (1), the eccentric wheel body (2) and the positioning groove (3) are all required to be processed respectively and independently, but the convex handle (1), the eccentric wheel body (2) and the positioning groove (3) are all processed independently, the processing process is complex, uncontrollable factors are more, the production efficiency is lower, and the production cost is very high.
CN101769370A provides a powder metallurgy eccentric helical gear and a method for manufacturing the same, in which a gear body and an eccentric cam are separately molded and pre-sintered, and then welded to form an integral through a welding point and then integrally tempered, so as to manufacture the powder metallurgy eccentric helical gear, but the gear body and the eccentric cam still need to be separately processed, and then are welded, and the like, which is complicated in manufacturing process, prone to cause center distance deviation, and low in production efficiency. The existing preparation method is to firstly carry out rough machining on round steel, then carry out finish machining through a machining center, and obtain a product after multiple positioning machining, and the preparation process is complex, the deviation of the center distance is easy to generate, and the production efficiency is not high.
CN103223489B provides a preparation method of eccentric wheel powder metallurgy, which is characterized in that a modification auxiliary agent is added into raw materials, ultrafine powder is provided in mixed raw materials, and a phosphating treatment process is matched, so that one-step forming can be realized, and the apparent density of the mixed materials is improved.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a metallurgical powder eccentric wheel for an atomizer compression pump and a preparation method thereof, and aims to improve the mechanical strength of the eccentric wheel, improve the density of a product and improve the production efficiency of the eccentric wheel.
In order to solve the technical problems, the invention adopts the following technical scheme:
the utility model provides a powder metallurgy eccentric wheel for atomizer compression pump which characterized in that, powder metallurgy eccentric wheel, by weight percent, its raw and other materials constitution includes: 92-93.4% of atomized iron powder, 0.8-1% of graphite, 2-2.3% of copper powder, 3-3.2% of nickel powder, 0.6-0.8% of molybdenum powder and 0.2-0.3% of manganese sulfide powder;
the atomized iron powder is a powder material produced by Swedish Hegners Limited, and the product model is ASC 100.29;
the preparation method of the powder metallurgy eccentric wheel for the atomizer compression pump comprises the steps of mixing, cooling, press forming and sintering;
mixing materials, wherein the stirring speed is 18-20rad/min, and the stirring time is 45-60 minutes;
cooling, namely cooling the mixed powder at room temperature, and standing for 20-24h at 25 ℃;
performing press forming, wherein the density difference between the eccentric wheel convex handle and the eccentric wheel body is less than 0.05 g/cm, the pressure is 14-15 tons, and the weight of the powder is 20-20.5 grams;
the forming rate can reach 8-10 pieces/minute;
sintering, wherein the temperature of a dewaxing section is 650-850 ℃, the dewaxing time is 1.5-2 hours, the temperature of a high temperature section is 1120-1130 ℃, and the heat preservation time is 30-50 minutes;
the invention applies ASC100.29 atomized iron powder to the manufacturing process of the powder metallurgy eccentric wheel in a breakthrough manner, in the iron-based powder metallurgy material, through the reasonable collocation of carbon, copper, nickel, molybdenum and manganese, the material not only has very strong compressibility, but also has excellent mechanical strength, only needs one-time pressing and one-time sintering during preparation to meet the requirement of the eccentric wheel product on service performance, simplifies the manufacturing process, and greatly improves the production efficiency.
By adopting the technical scheme, the invention has the beneficial effects that:
1. by adopting the preparation method of the metallurgical powder eccentric wheel for the atomizer compression pump, the test is carried out through a pressure feed testing machine, the crushing value of the eccentric wheel can be improved to 2300 plus 2500N, the material strength is higher, and the product performance requirement is met;
2. by adopting the preparation method of the metallurgical powder eccentric wheel for the atomizer compression pump, the product density can reach 7.2-7.3g/cm through high-speed dry-rolling and sintering, and the higher material density can be reached through one-time pressing and sintering;
3. by adopting the powder metallurgy material, the convex handle, the eccentric wheel body and the positioning groove are molded at one time by pressing, so that the processing process that a plurality of parts are respectively independent is omitted, the manufacturing is easy, the press molding speed can reach 8-10 pieces/minute, and the production efficiency is obviously improved;
4. by adopting the preparation method of the metallurgical powder eccentric wheel for the atomizer compression pump, the problem of unstable center distance generated in the processing process of eccentric wheel products can be solved, the powder metallurgical material is formed in one step, the deviation existing in the process of multiple clamping is avoided, and the center distance is very stable;
5. by adopting the preparation method of the metallurgical powder eccentric wheel for the atomizer compression pump, the powder metallurgy material is formed at one time, the pressed product is very smooth, the phenomenon that burrs are generated on the product after a cutter is worn when the product is machined and cut is avoided, and the yield is high.
Description of the drawings:
FIG. 1 is a schematic view of an eccentric wheel for a compression pump of an atomizer
Wherein, (1) shows the convex handle, (2) shows the eccentric wheel body, (3) shows the locating slot
The specific implementation mode is as follows:
the invention is further illustrated below with reference to specific examples.
The powder metallurgy eccentric wheel for the atomizer compression pump comprises the following raw materials in percentage by weight:
93 percent of atomized iron powder, 1 percent of graphite, 2 percent of copper powder, 3 percent of nickel powder, 0.7 percent of molybdenum powder and 0.3 percent of manganese sulfide powder
The atomized iron powder is a powder material produced by Swedish Hegners Limited, and the product model is ASC 100.29;
the preparation method of the powder metallurgy eccentric wheel for the atomizer compression pump comprises the following steps:
1. mixing material
Stirring atomized iron powder, graphite, copper powder, nickel powder, molybdenum powder and manganese sulfide by a powder mixer at a stirring speed of 18rad/min for 45 minutes;
2. cooling down
After the powder materials are uniformly mixed, cooling is carried out at room temperature, and the mixture is placed for 20 hours at 25 ℃ for use;
3. and (3) pressing and forming:
adding the mixed powder into a hopper, performing compression molding by a press, wherein the middle die is made of hard alloy, other punches are made of high-speed steel, and the density difference between the eccentric wheel convex handle and the eccentric wheel body is controlled not to exceed 0.05 g/cm for carrying out thin-film forging to obtain a molding blank;
the press forming is carried out, the pressure is 14 tons, the powder weight is 20 grams, and the press forming speed is 8 per minute;
4. and (3) sintering:
placing the formed blank in a sintering furnace for sintering, and changing the formed blank into a high-strength sintered blank after sintering;
and (3) sintering: the dewaxing time is 2 hours at 650 ℃ in the dewaxing section, the heat preservation time is 30 minutes at 1130 ℃ in the high temperature section, and the furnace protective atmosphere is 90 percent of nitrogen and 10 percent of hydrogen.
The metallurgical powder eccentric wheel for the atomizer compression pump, which is prepared by adopting the technical scheme of embodiment 1 of the invention, has the density of 7.215 g/cm, the pressure-fed value of 2350N and higher material strength.
The powder metallurgy eccentric wheel for the atomizer compression pump comprises the following raw materials in percentage by weight:
93.15 percent of atomized iron powder, 0.8 percent of graphite, 2.2 percent of copper powder, 3 percent of nickel powder, 0.6 percent of molybdenum powder and 0.25 percent of manganese sulfide powder
The atomized iron powder is a powder material produced by Swedish Hegners Limited, and the product model is ASC 100.29;
the preparation method of the powder metallurgy eccentric wheel for the atomizer compression pump comprises the following steps:
1. mixing material
Stirring atomized iron powder, graphite, copper powder, nickel powder, molybdenum powder and manganese sulfide by a powder mixer at a stirring speed of 18rad/min for 50 minutes;
2. cooling down
After the powder materials are uniformly mixed, cooling is carried out at room temperature, and then the mixture is placed for 24 hours at 25 ℃ for use;
3. and (3) pressing and forming:
adding the mixed powder into a hopper, performing compression molding by a press, wherein the middle die is made of hard alloy, other punches are made of high-speed steel, and the density difference between the eccentric wheel convex handle and the eccentric wheel body is controlled not to exceed 0.03 g/cm for carrying out thin film forging to obtain a molding blank;
the pressure of the compression molding is 14.5 tons, the weight of the powder is 20 grams, and the compression molding speed is 10 per minute;
4. and (3) sintering:
placing the formed blank in a sintering furnace for sintering, and changing the formed blank into a high-strength sintered blank after sintering;
and (3) sintering: the dewaxing period is 750 ℃, the dewaxing time is 1.5 hours, the high temperature period is 1120 ℃, the heat preservation time is 50 minutes, and the furnace protective atmosphere is 90 percent of nitrogen and 10 percent of hydrogen.
The metallurgical powder eccentric wheel for the atomizer compression pump, which is prepared by adopting the technical scheme of the embodiment 2, has the density of 7.278 g/cm and the pressure-fed value of 2412N, and is high in material strength.
The powder metallurgy eccentric wheel for the atomizer compression pump comprises the following raw materials in percentage by weight:
92.9 percent of atomized iron powder, 0.8 percent of graphite, 2 percent of copper powder, 3.2 percent of nickel powder, 0.8 percent of molybdenum powder and 0.3 percent of manganese sulfide powder
The atomized iron powder is a powder material produced by Swedish Hegners Limited, and the product model is ASC 100.29;
the preparation method of the powder metallurgy eccentric wheel for the atomizer compression pump comprises the following steps:
1. mixing material
Stirring atomized iron powder, graphite, copper powder, nickel powder, molybdenum powder and manganese sulfide by a powder mixer at a stirring speed of 20rad/min for 60 minutes;
2. cooling down
After the powder materials are uniformly mixed, cooling is carried out at room temperature, and the mixture is placed for 20 hours at 25 ℃ for use;
3. and (3) pressing and forming:
adding the mixed powder into a hopper, performing compression molding by a press, wherein the middle die is made of hard alloy, other punches are made of high-speed steel, and the density difference between the eccentric wheel convex handle and the eccentric wheel body is controlled not to exceed 0.05 g/cm for carrying out thin-film forging to obtain a molding blank;
the pressure of the pressing forming is 15 tons, the powder weight is 20.5 grams, and the pressing forming speed is 10 per minute;
4. and (3) sintering:
placing the formed blank in a sintering furnace for sintering, and changing the formed blank into a high-strength sintered blank after sintering;
and (3) sintering: the dewaxing time is 1.5 hours at 850 ℃ in the dewaxing section, the heat preservation time is 40 minutes at 1130 ℃ in the high temperature section, and the furnace protective atmosphere is 90 percent of nitrogen and 10 percent of hydrogen.
The metallurgical powder eccentric wheel for the atomizer compression pump, which is prepared by adopting the technical scheme of embodiment 3 of the invention, has the density of 7.305 g/cm, the pressure-fed value of 2495N and higher material strength.
Embodiment 4 atomizer compression pump powder metallurgy eccentric wheel and preparation method thereof
The powder metallurgy eccentric wheel for the atomizer compression pump comprises the following raw materials in percentage by weight:
92.4 percent of atomized iron powder, 1 percent of graphite, 2.3 percent of copper powder, 3.2 percent of nickel powder, 0.8 percent of molybdenum powder and 0.3 percent of manganese sulfide powder
The atomized iron powder is a powder material produced by Swedish Hegners Limited, and the product model is ASC 100.29;
the preparation method of the powder metallurgy eccentric wheel for the atomizer compression pump comprises the following steps:
1. mixing material
Stirring atomized iron powder, graphite, copper powder, nickel powder, molybdenum powder and manganese sulfide by a powder mixer at a stirring speed of 20rad/min for 60 minutes;
2. cooling down
After the powder materials are uniformly mixed, cooling is carried out at room temperature, and the mixture is placed for 22 hours at 25 ℃ for use;
3. and (3) pressing and forming:
adding the mixed powder into a hopper, performing compression molding by a press, wherein the middle die is made of hard alloy, other punches are made of high-speed steel, and the density difference between the eccentric wheel convex handle and the eccentric wheel body is controlled not to exceed 0.02 g/cm for carrying out thin film forging to obtain a molding blank;
the pressure of the pressing forming is 15 tons, the powder weight is 20.3 grams, and the pressing forming speed is 10 per minute;
4. and (3) sintering:
placing the formed blank in a sintering furnace for sintering, and changing the formed blank into a high-strength sintered blank after sintering;
and (3) sintering: the dewaxing period is 750 ℃, the dewaxing time is 1.5 hours, the high temperature period is 1120 ℃, the heat preservation time is 30 minutes, and the furnace protective atmosphere is 90 percent of nitrogen and 10 percent of hydrogen.
The metallurgical powder eccentric wheel for the atomizer compression pump, which is prepared by adopting the technical scheme of embodiment 4 of the invention, has the density of 7.255 g/cm, the pressure-feed value of 2453N and high material strength.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that various changes, modifications and substitutions can be made without departing from the spirit and scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. The utility model provides a powder metallurgy eccentric wheel for atomizer compression pump which characterized in that, powder metallurgy eccentric wheel, by weight percent, its raw and other materials constitution includes: 92-93.4% of atomized iron powder, 0.8-1% of graphite, 2-2.3% of copper powder, 3-3.2% of nickel powder, 0.6-0.8% of molybdenum powder and 0.2-0.3% of manganese sulfide powder.
2. The eccentric wheel of claim 1, wherein the atomized iron powder is a powder manufactured by Hegners Limited, Sweden, and its product model is ASC 100.29.
3. The preparation method of the powder metallurgy eccentric wheel for the atomizer compression pump is characterized by comprising the steps of mixing, cooling, press forming and sintering.
4. The preparation method according to claim 3, wherein the pressing forming is carried out by carrying out high speed carrying on the eccentric wheel convex handle and the eccentric wheel body according to the density difference of less than 0.05 g/cm under the pressure of 14-15 tons and the powder weight of 20-20.5 grams.
5. The method as claimed in claim 3, wherein the sintering temperature is 650-850 ℃ and the dewaxing time is 1.5-2 hours, the temperature is 1120-1130 ℃ and the holding time is 30-50 minutes.
6. The method according to claim 3, wherein the powder after cooling and mixing is cooled at room temperature and left at 25 ℃ for 20 to 24 hours.
7. The preparation method according to claim 3, wherein the mixing is performed at a stirring speed of 18 to 20rad/min for 45 to 60 minutes.
8. The method according to claim 3, wherein the press molding is carried out at a molding rate of 8 to 10 pieces/minute.
9. The preparation method as claimed in claims 1 to 8, wherein the crushing value of the prepared eccentric wheel is 2300-2500N, and the density can reach 7.2-7.3 g/cm.
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| CN201911196067.6A CN110788332A (en) | 2019-11-29 | 2019-11-29 | Powder metallurgy eccentric wheel for atomizer compression pump and preparation method thereof |
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