CN103223489A - Method for manufacturing eccentric wheel through powder metallurgy - Google Patents
Method for manufacturing eccentric wheel through powder metallurgy Download PDFInfo
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- CN103223489A CN103223489A CN2013101206115A CN201310120611A CN103223489A CN 103223489 A CN103223489 A CN 103223489A CN 2013101206115 A CN2013101206115 A CN 2013101206115A CN 201310120611 A CN201310120611 A CN 201310120611A CN 103223489 A CN103223489 A CN 103223489A
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- 238000004663 powder metallurgy Methods 0.000 title claims abstract description 15
- 238000000034 method Methods 0.000 title abstract description 6
- 238000004519 manufacturing process Methods 0.000 title abstract description 5
- 239000000654 additive Substances 0.000 claims abstract description 21
- 230000000996 additive effect Effects 0.000 claims abstract description 20
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000000843 powder Substances 0.000 claims abstract description 10
- 238000003825 pressing Methods 0.000 claims abstract description 10
- 239000002994 raw material Substances 0.000 claims abstract description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 8
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000002245 particle Substances 0.000 claims abstract description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 4
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims abstract description 4
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229910052802 copper Inorganic materials 0.000 claims abstract description 4
- 239000010949 copper Substances 0.000 claims abstract description 4
- 229910052742 iron Inorganic materials 0.000 claims abstract description 4
- 239000007788 liquid Substances 0.000 claims abstract description 4
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 4
- 239000011733 molybdenum Substances 0.000 claims abstract description 4
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 4
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 12
- 239000000920 calcium hydroxide Substances 0.000 claims description 12
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 10
- 238000005245 sintering Methods 0.000 claims description 10
- 238000002360 preparation method Methods 0.000 claims description 9
- 230000000630 rising effect Effects 0.000 claims description 9
- XMNIXWIUMCBBBL-UHFFFAOYSA-N 2-(2-phenylpropan-2-ylperoxy)propan-2-ylbenzene Chemical compound C=1C=CC=CC=1C(C)(C)OOC(C)(C)C1=CC=CC=C1 XMNIXWIUMCBBBL-UHFFFAOYSA-N 0.000 claims description 7
- 229920003023 plastic Polymers 0.000 claims description 7
- 239000004033 plastic Substances 0.000 claims description 7
- 229920002689 polyvinyl acetate Polymers 0.000 claims description 7
- 229940075065 polyvinyl acetate Drugs 0.000 claims description 7
- 239000011118 polyvinyl acetate Substances 0.000 claims description 7
- WYTZZXDRDKSJID-UHFFFAOYSA-N (3-aminopropyl)triethoxysilane Chemical compound CCO[Si](OCC)(OCC)CCCN WYTZZXDRDKSJID-UHFFFAOYSA-N 0.000 claims description 6
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 6
- 235000021355 Stearic acid Nutrition 0.000 claims description 6
- 239000007864 aqueous solution Substances 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 6
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 6
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims description 6
- 238000005554 pickling Methods 0.000 claims description 6
- 238000010791 quenching Methods 0.000 claims description 6
- 239000011265 semifinished product Substances 0.000 claims description 6
- 239000008117 stearic acid Substances 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 6
- 239000000725 suspension Substances 0.000 claims description 6
- 238000005496 tempering Methods 0.000 claims description 6
- 239000000243 solution Substances 0.000 claims description 4
- 239000012188 paraffin wax Substances 0.000 claims description 3
- 230000000171 quenching effect Effects 0.000 claims description 3
- 238000005406 washing Methods 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 3
- 239000000203 mixture Substances 0.000 abstract description 3
- CJZGTCYPCWQAJB-UHFFFAOYSA-L calcium stearate Chemical compound [Ca+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O CJZGTCYPCWQAJB-UHFFFAOYSA-L 0.000 abstract description 2
- 239000008116 calcium stearate Substances 0.000 abstract description 2
- 235000013539 calcium stearate Nutrition 0.000 abstract description 2
- 239000000314 lubricant Substances 0.000 abstract description 2
- 238000002156 mixing Methods 0.000 abstract description 2
- 239000011148 porous material Substances 0.000 abstract description 2
- 239000004264 Petrolatum Substances 0.000 abstract 1
- 239000006087 Silane Coupling Agent Substances 0.000 abstract 1
- 229940066842 petrolatum Drugs 0.000 abstract 1
- 235000019271 petrolatum Nutrition 0.000 abstract 1
- 239000012169 petroleum derived wax Substances 0.000 abstract 1
- 235000019381 petroleum wax Nutrition 0.000 abstract 1
- 230000000704 physical effect Effects 0.000 abstract 1
- -1 polyethylene vinyl acetate Polymers 0.000 abstract 1
- 208000037656 Respiratory Sounds Diseases 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- 238000000465 moulding Methods 0.000 description 3
- 239000012752 auxiliary agent Substances 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 229910000077 silane Inorganic materials 0.000 description 1
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- Powder Metallurgy (AREA)
Abstract
The invention discloses a method for manufacturing an eccentric wheel through powder metallurgy. The method comprises the following step: the eccentric wheel is manufactured by the following raw materials in percentage by weight: 0.2-0.4 percent of nickel, 0.4-0.6 percent of molybdenum, 0.6-0.8 percent of tin, 0.3-0.5 percent of aluminium oxide powder, 0.8-1 percent of graphite powder, 0.4-0.6 percent of petroleum wax, 4-6 percent of copper, 1-2 percent of performance additive and the balance of iron. According to the invention, through the added performance additive, superfine powder is provided in the mixed material, and the superfine powder can be filled in the gaps of large particles, so that apparent density of the mixture is improved; the superfine powder is mainly formed by nano-zinc oxide powder and calcium stearate, and through additives including a silane coupling agent and the like, a novel performance additive is obtained, and various physical properties about wear resistance and the like of the product are further improved, and as polyethylene vinyl acetate and liquid petrolatum are taken as lubricants to be added into the performance additive, the effect of the performance additive during mixing and pressing is enhanced, the blank pressing strength of a powder metallurgy structural piece under equal pressing pressure is greatly improved, combination form and pore shape of raw material particles are changed, and the problem about crack generation is solved from the root cause.
Description
Technical field
The present invention relates generally to a kind of preparation method of eccentric wheel powder metallurgy, belongs to casting field.
Background technology
Along with China's economy constantly develops, the powder metallurgy structure purposes is more and more wider.Powder metallurgy has very big economic advantages as a kind of near-net-shape technology when the part that batches such as production structure part are big, dimensional accuracy is high, processing charges are high.But there is a weakness in powder metallurgy structural part: product compact strength before sintering not is very low, causes occurring crackle in moulding and the handling process easily, and can't find out in manufacture process.This is fatal defective as vehicle key position part on some is used, and has caused powder metallurgy structural part can only be applied on the medium to low-risk stressed member, and the scope of application has been subjected to very big restriction.
Powder metallurgy structural part intensity is influenced by three aspect factors mainly: the one, and material composition, the 2nd, product density, the 3rd, whether product crackle occurs in moulding and handling process.Material composition influences manufacturing cost, and product density is very big to moulding board and mould loss influence, and crackle mainly is subjected to the pressed compact intensity effect, and is difficult to find out.
Summary of the invention
The object of the invention is exactly in order to remedy the defective of prior art, a kind of preparation method of eccentric wheel powder metallurgy to be provided.
The present invention is achieved by the following technical solutions:
A kind of preparation method of eccentric wheel powder metallurgy, it may further comprise the steps:
(1) batching: described eccentric wheel is to be made by following weight percentages:
The modified additive of the paraffin of the aluminium oxide powder of the nickel of 0.2-0.4%, the molybdenum of 0.4-0.6%, 0.6-0.8% tin, 0.3-0.5%, the graphite powder of 0.8-1%, 0.4-0.6%, the copper of 4-6%, 1-2%, all the other are iron;
Described modified additive is to be made by the raw material of following weight parts:
Nano zinc oxide powder 90-100, calcium hydroxide 30-40, stearic acid 30-40, cumyl peroxide 6-8, plastic of poly vinyl acetate 8-10, nano-tungsten powder 2-4, AEO 2-3, atoleine 3-4, aminopropyl triethoxysilane 0.8-1, water are an amount of;
The preparation method of described modified additive may further comprise the steps:
In A, the water with quality such as the calcium hydroxide of above-mentioned weight portion join, at 90-110 ℃ of following agitating heating 20-30 minute, calcium hydroxide aqueous solution;
B, the stearic acid of above-mentioned weight portion is heated to 60-70 ℃, the nano-tungsten powder, the AEO that add above-mentioned weight portion, the rising temperature is as for 80-85 ℃, constant temperature stirred 1-2 hour, under stirring condition, slowly be added into above-mentioned calcium hydroxide aqueous solution, add the back that finishes and continue to stir 1-2 hour, get mixed liquor;
C, the nano zine oxide powder particles of above-mentioned weight portion is distributed in the water, obtains containing the suspension of nano zinc oxide powder;
D, the cumyl peroxide, plastic of poly vinyl acetate, the atoleine that add above-mentioned weight portion in the above-mentioned suspension that contains nano zinc oxide powder stirred 40-50 minute under 500-600 rev/min speed, add the aminopropyl triethoxysilane of above-mentioned weight portion and the mixed liquor that step B obtains again, high speed 1800-2000 rev/min was stirred 20-30 minute, oven dry, grind into superfines, promptly get described modified additive.
(2) compacting: put into cold stamping die after each raw material of above-mentioned weight portion mixed, compacting is 1-3 minute under the pressure of 800-900MPa, makes the blank of colding pressing;
(3) sintering: in sintering atmosphere is under the condition of vacuum, reducing atmosphere or inert atmosphere, the above-mentioned blank of colding pressing is carried out sintering under the pressure of 1-5MPa, temperature schedule is: earlier at 300-500 ℃ of following pre-burning 5-10 minute, then with 5-7 ℃/minute speed rising temperature, when temperature reaches 700-800 ℃, constant temperature 15-25 minute, again with 3-5 ℃/minute speed rising temperature, when temperature reaches 900-1050 ℃, constant temperature 1-2 hour, and then reduce temperature to normal temperature with 4-6 ℃/minute speed and cool off, obtain eccentric semi-finished product;
(4) heat treatment: the eccentric wheel semi-finished product are incubated 1-3 hour down at 860-880 ℃, enter oil groove then and quench, the oil temperature is 45-55 ℃, sends into the tempering furnace tempering after the quenching 1-2 hour, temperature 200-250 ℃, be incubated 1-2 hour, and be cooled to room temperature then;
(5) phosphatization: pre-phosphatization: phosphatization liquor temperature is 90-100 ℃, and pre-phosphating time is 10-15 minute; Pickling: at room temperature be hydrochloric acid solution pickling 1-3 minute of 10-12% with concentration; Normal temperature washing 2-3 time; Phosphatization again: the phosphatization liquid temp is 90-100 ℃, and phosphating time is 20-30 minute; Temperature is that 70-80 ℃ water cleans 2-3 time; Oven dry promptly gets described eccentric wheel.
Advantage of the present invention is:
The modified additive of the present invention by adding, superfines is provided in mixed material, this superfines can be filled between oarse-grained slit, thereby improved the apparent density of compound, and the main component of this superfines is nano zinc oxide powder and calcium stearate, pass through silane coupler, the new modified auxiliary agent that auxiliary agents such as cumyl peroxide obtain, every physical characteristics such as wearability of goods have further been improved, wherein plastic of poly vinyl acetate and atoleine add in the modified additive as lubricant, strengthened this modified additive in the effect of mixing compacting, under equal pressing pressure, significantly improve the powder metallurgy structural part compact strength, change raw material particle combining form and pore shape, solved the generation of crackle from root.
The specific embodiment
Embodiment 1
A kind of preparation method of eccentric wheel powder metallurgy, it may further comprise the steps:
(1) batching: described eccentric wheel is to be made by following weight percentages:
0.4% nickel, 0.6% molybdenum, 0.8% tin, 0.5% aluminium oxide powder, 0.8% graphite powder, 0.6% paraffin, 6% copper, 2% modified additive, all the other are iron;
Described modified additive is to be made by the raw material of following weight parts:
Nano zinc oxide powder 100, calcium hydroxide 40, stearic acid 40, cumyl peroxide 8, plastic of poly vinyl acetate 10, nano-tungsten powder 4, AEO 3, atoleine 4, aminopropyl triethoxysilane 1, water are an amount of;
The preparation method of described modified additive may further comprise the steps:
In A, the water with quality such as the calcium hydroxide of above-mentioned weight portion join, 110 ℃ of following agitating heating 30 minutes, calcium hydroxide aqueous solution;
B, the stearic acid of above-mentioned weight portion is heated to 70 ℃, the nano-tungsten powder, the AEO that add above-mentioned weight portion, the rising temperature is as for 85 ℃, constant temperature stirred 2 hours, under stirring condition, slowly be added into above-mentioned calcium hydroxide aqueous solution, add the back that finishes and continue to stir 1 hour, get mixed liquor;
C, the nano zine oxide powder particles of above-mentioned weight portion is distributed in the water, obtains containing the suspension of nano zinc oxide powder;
D, the cumyl peroxide, plastic of poly vinyl acetate, the atoleine that add above-mentioned weight portion in the above-mentioned suspension that contains nano zinc oxide powder stirred 50 minutes under 600 rev/mins speed, add the aminopropyl triethoxysilane of above-mentioned weight portion and the mixed liquor that step B obtains again, 2000 rev/mins were stirred 30 minutes at a high speed, oven dry, grind into superfines, promptly get described modified additive.
(2) compacting: put into cold stamping die after each raw material of above-mentioned weight portion mixed, compacting is 3 minutes under the pressure of 900MPa, makes the blank of colding pressing;
(3) sintering: in sintering atmosphere is under the condition of vacuum, reducing atmosphere or inert atmosphere, the above-mentioned blank of colding pressing is carried out sintering under the pressure of 5MPa, temperature schedule is: earlier 500 ℃ of following pre-burnings 10 minutes, then with 7 ℃/minute speed rising temperature, when temperature reaches 800 ℃, constant temperature 25 minutes, again with 5 ℃/minute speed rising temperature, when temperature reaches 1050 ℃, constant temperature 2 hours, and then reduce temperature to normal temperature with 6 ℃/minute speed and cool off, obtain eccentric semi-finished product;
(4) heat treatment: the eccentric wheel semi-finished product are incubated 1 hour down at 880 ℃, enter oil groove then and quench, oily temperature is 55 ℃, sends into the tempering furnace tempering after the quenching 1 hour, and 250 ℃ of temperatures are incubated 2 hours, are cooled to room temperature then;
(5) phosphatization: pre-phosphatization: phosphatization liquor temperature is 100 ℃, and pre-phosphating time is 15 minutes; Pickling: be 12% hydrochloric acid solution pickling 3 minutes at room temperature with concentration; Normal temperature washing 3 times; Phosphatization again: the phosphatization liquid temp is 100 ℃, and phosphating time is 30 minutes; Temperature is that 80 ℃ water cleans 2-3 time; Oven dry promptly gets described eccentric wheel.
Performance test:
Ultimate tensile strength intensity σ b (MPa): 817
Yield strength σ s (MPa): 507
Percentage elongation δ 5 (%): 160
Contraction percentage of area ψ (%): 39.
Claims (1)
1. the preparation method of an eccentric wheel powder metallurgy is characterized in that it may further comprise the steps:
(1) batching: described eccentric wheel is to be made by following weight percentages:
The modified additive of the paraffin of the aluminium oxide powder of the nickel of 0.2-0.4%, the molybdenum of 0.4-0.6%, 0.6-0.8% tin, 0.3-0.5%, the graphite powder of 0.8-1%, 0.4-0.6%, the copper of 4-6%, 1-2%, all the other are iron;
Described modified additive is to be made by the raw material of following weight parts:
Nano zinc oxide powder 90-100, calcium hydroxide 30-40, stearic acid 30-40, cumyl peroxide 6-8, plastic of poly vinyl acetate 8-10, nano-tungsten powder 2-4, AEO 2-3, atoleine 3-4, aminopropyl triethoxysilane 0.8-1, water are an amount of;
The preparation method of described modified additive may further comprise the steps:
In A, the water with quality such as the calcium hydroxide of above-mentioned weight portion join, at 90-110 ℃ of following agitating heating 20-30 minute, calcium hydroxide aqueous solution;
B, the stearic acid of above-mentioned weight portion is heated to 60-70 ℃, the nano-tungsten powder, the AEO that add above-mentioned weight portion, the rising temperature is as for 80-85 ℃, constant temperature stirred 1-2 hour, under stirring condition, slowly be added into above-mentioned calcium hydroxide aqueous solution, add the back that finishes and continue to stir 1-2 hour, get mixed liquor;
C, the nano zine oxide powder particles of above-mentioned weight portion is distributed in the water, obtains containing the suspension of nano zinc oxide powder;
D, the cumyl peroxide, plastic of poly vinyl acetate, the atoleine that add above-mentioned weight portion in the above-mentioned suspension that contains nano zinc oxide powder stirred 40-50 minute under 500-600 rev/min speed, add the aminopropyl triethoxysilane of above-mentioned weight portion and the mixed liquor that step B obtains again, high speed 1800-2000 rev/min was stirred 20-30 minute, oven dry, grind into superfines, promptly get described modified additive;
(2) compacting: put into cold stamping die after each raw material of above-mentioned weight portion mixed, compacting is 1-3 minute under the pressure of 800-900MPa, makes the blank of colding pressing;
(3) sintering: in sintering atmosphere is under the condition of vacuum, reducing atmosphere or inert atmosphere, the above-mentioned blank of colding pressing is carried out sintering under the pressure of 1-5MPa, temperature schedule is: earlier at 300-500 ℃ of following pre-burning 5-10 minute, then with 5-7 ℃/minute speed rising temperature, when temperature reaches 700-800 ℃, constant temperature 15-25 minute, again with 3-5 ℃/minute speed rising temperature, when temperature reaches 900-1050 ℃, constant temperature 1-2 hour, and then reduce temperature to normal temperature with 4-6 ℃/minute speed and cool off, obtain eccentric semi-finished product;
(4) heat treatment: the eccentric wheel semi-finished product are incubated 1-3 hour down at 860-880 ℃, enter oil groove then and quench, the oil temperature is 45-55 ℃, sends into the tempering furnace tempering after the quenching 1-2 hour, temperature 200-250 ℃, be incubated 1-2 hour, and be cooled to room temperature then;
(5) phosphatization: pre-phosphatization: phosphatization liquor temperature is 90-100 ℃, and pre-phosphating time is 10-15 minute; Pickling: at room temperature be hydrochloric acid solution pickling 1-3 minute of 10-12% with concentration; Normal temperature washing 2-3 time; Phosphatization again: the phosphatization liquid temp is 90-100 ℃, and phosphating time is 20-30 minute; Temperature is that 70-80 ℃ water cleans 2-3 time; Oven dry promptly gets described eccentric wheel.
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| CN103572162A (en) * | 2013-10-10 | 2014-02-12 | 铜陵国方水暖科技有限责任公司 | Powder-metallurgy slippage pump rotor and preparation method thereof |
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| CN103600081B (en) * | 2013-10-10 | 2016-05-04 | 铜陵新创流体科技有限公司 | A kind of powder-metallurgy refrigeration compressor valve sheet and preparation method thereof |
| CN103600076B (en) * | 2013-10-10 | 2016-05-04 | 铜陵新创流体科技有限公司 | A kind of powder metallurgy automobile power steering pump stator and preparation method thereof |
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| CN105149590A (en) * | 2015-08-28 | 2015-12-16 | 苏州莱特复合材料有限公司 | Powder metallurgy gear and manufacturing method thereof |
| CN106048172A (en) * | 2016-07-20 | 2016-10-26 | 柳州科尔特锻造机械有限公司 | Microwave sintering technology for alloy steel |
| CN107008909A (en) * | 2017-03-27 | 2017-08-04 | 刘金财 | A kind of preparation method of high-precision powder metallurgical gear |
| CN110788332A (en) * | 2019-11-29 | 2020-02-14 | 济南市博瀚精工机械有限公司 | Powder metallurgy eccentric wheel for atomizer compression pump and preparation method thereof |
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| CN103223489B (en) | 2016-08-24 |
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