CN105149590A - Powder metallurgy gear and manufacturing method thereof - Google Patents
Powder metallurgy gear and manufacturing method thereof Download PDFInfo
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- CN105149590A CN105149590A CN201510540759.3A CN201510540759A CN105149590A CN 105149590 A CN105149590 A CN 105149590A CN 201510540759 A CN201510540759 A CN 201510540759A CN 105149590 A CN105149590 A CN 105149590A
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Abstract
The invention discloses a powder metallurgy gear and a manufacturing method thereof. The gear is composed of the following ingredients, by mass, 12-24 parts of nickel powder, 1 part-13 parts of copper powder, 5-15 parts of aluminum powder, 2-10 parts of zircon sand, 8-19 parts of zinc powder, 4-11 parts of aluminum oxide, 35-51 parts of iron powder, 3-10 parts of boron powder and 2-16 parts of calcium oxalate. The compression resistance and the salt spray resistance are improved while the tooth portion HRC of the gear is high, the manufacturing process is simple, and the gear has the good market prospect.
Description
Technical field
The invention belongs to field of powder metallurgy, be specifically related to a kind of powder metallurgical gear and preparation method thereof.
Background technology
Powder metallurgy be produce metal dust or with metal dust (or mixture of metal dust and non-metal powder) as raw material, through being shaped and sintering, manufacture the technology of metal material, composite and all kinds goods.
Gear drive is a kind of machine driving most widely used in modern mechanical product, this is because it can ensure constant gearratio, has the advantages such as transmission power scope is large, efficiency is high, the life-span is long.Adopt the gear of metallurgical technology manufacture can ensure the uniformity of gear morpheme and dimensional tolerance, but due to the working environment of gear complicated, had higher requirement to its performance.
Authorization Notice No. be CN102179519B patent discloses a kind of powder metallurgy transmitting gear, its compressive resistance and salt spray resistance have much room for improvement.
Summary of the invention
In order to overcome above the deficiencies in the prior art, the invention provides a kind of powder metallurgical gear and preparation method thereof, obtained gear, while teeth portion HRC is high, can improve resistance to compression and salt spray resistance, and preparation technology is simple, has good market prospects.
The technical solution used in the present invention is: a kind of powder metallurgical gear, is made up of each component of following mass parts: nickel powder 12-24 part, copper powder 1-13 part, aluminium powder 5-15 part, zircon sand 2-10 part, zinc powder 8-19 part, alundum (Al2O3) 4-11 part, iron powder 35-51 part, boron powder 3-10 part, calcium oxalate 2-16 part.
Preferably, a kind of powder metallurgical gear, is made up of each component of following mass parts: nickel powder 15-22 part, copper powder 4-11 part, aluminium powder 7-12 part, zircon sand 5-9 part, zinc powder 10-16 part, alundum (Al2O3) 7-10 part, iron powder 38-46 part, boron powder 4-8 part, calcium oxalate 5-13 part.
Preferred, a kind of powder metallurgical gear, is made up of each component of following mass parts: nickel powder 19 parts, copper powder 8 parts, aluminium powder 9 parts, zircon sand 6 parts, zinc powder 13 parts, alundum (Al2O3) 8 parts, iron powder 42 parts, 6 parts, boron powder, calcium oxalate 10 parts.
A preparation method for powder metallurgical gear, comprises the following steps:
(1) by above-mentioned mass parts, nickel powder, copper powder, aluminium powder, zircon sand, zinc powder, alundum (Al2O3), iron powder, boron powder, calcium oxalate mix after pulverizing, and sieve, obtain compound;
(2) step (1) gained compound is adopted powder metallurgy two-way floating pressing process, specific mo(u)lding pressure is 550-800MPa, compressingly obtains blank;
(3) step (2) gained blank is sintered to 1100-1300 DEG C, take out after insulation 2-4h, namely obtain described powder metallurgical gear with after stove cooling.
Above-mentioned steps (1) is sieved in process and is adopted 80-150 eye mesh screen.
In above-mentioned steps (3) sintering process, sintering pressure is 8-11Kg/cm
2.
Beneficial effect: the powder metallurgical gear teeth portion compressive resistance that the present invention obtains is between 5920-6015N, teeth portion HRC all >=30, occur without red rust after 24 hours salt spray tests, due to the synergy between component, while teeth portion HRC is high, can improve resistance to compression and salt spray resistance, preparation technology is simple, has good market prospects.
Detailed description of the invention
Embodiment 1
A kind of powder metallurgical gear, is made up of each component of following mass parts: nickel powder 12 parts, copper powder 1 part, aluminium powder 5 parts, zircon sand 2 parts, zinc powder 8 parts, alundum (Al2O3) 4 parts, iron powder 35 parts, 3 parts, boron powder, calcium oxalate 2 parts.
Preparation method:
(1) by above-mentioned mass parts, nickel powder, copper powder, aluminium powder, zircon sand, zinc powder, alundum (Al2O3), iron powder, boron powder, calcium oxalate mix after pulverizing, and cross 80 eye mesh screens, obtain compound;
(2) step (1) gained compound is adopted powder metallurgy two-way floating pressing process, specific mo(u)lding pressure is 550MPa, compressingly obtains blank;
(3) step (2) gained blank is sintered to 1100 DEG C, sintering pressure is 8Kg/cm
2, take out after insulation 2h, namely obtain described powder metallurgical gear with after stove cooling.
Embodiment 2
A kind of powder metallurgical gear, is made up of each component of following mass parts: nickel powder 24 parts, copper powder 13 parts, aluminium powder 15 parts, zircon sand 10 parts, zinc powder 19 parts, alundum (Al2O3) 11 parts, iron powder 51 parts, 10 parts, boron powder, calcium oxalate 16 parts.
Preparation method:
(1) by above-mentioned mass parts, nickel powder, copper powder, aluminium powder, zircon sand, zinc powder, alundum (Al2O3), iron powder, boron powder, calcium oxalate mix after pulverizing, and cross 150 eye mesh screens, obtain compound;
(2) step (1) gained compound is adopted powder metallurgy two-way floating pressing process, specific mo(u)lding pressure is 800MPa, compressingly obtains blank;
(3) step (2) gained blank is sintered to 1300 DEG C, sintering pressure is 11Kg/cm
2, take out after insulation 4h, namely obtain described powder metallurgical gear with after stove cooling.
Embodiment 3
A kind of powder metallurgical gear, is made up of each component of following mass parts: nickel powder 15 parts, copper powder 4 parts, aluminium powder 7 parts, zircon sand 5 parts, zinc powder 10 parts, alundum (Al2O3) 7 parts, iron powder 38 parts, 4 parts, boron powder, calcium oxalate 5 parts.
Preparation method:
(1) by above-mentioned mass parts, nickel powder, copper powder, aluminium powder, zircon sand, zinc powder, alundum (Al2O3), iron powder, boron powder, calcium oxalate mix after pulverizing, and cross 100 eye mesh screens, obtain compound;
(2) step (1) gained compound is adopted powder metallurgy two-way floating pressing process, specific mo(u)lding pressure is 600MPa, compressingly obtains blank;
(3) step (2) gained blank is sintered to 1150 DEG C, sintering pressure is 9Kg/cm
2, take out after insulation 2.5h, namely obtain described powder metallurgical gear with after stove cooling.
Embodiment 4
A kind of powder metallurgical gear, is made up of each component of following mass parts: nickel powder 22 parts, copper powder 11 parts, aluminium powder 12 parts, zircon sand 9 parts, zinc powder 16 parts, alundum (Al2O3) 10 parts, iron powder 46 parts, 8 parts, boron powder, calcium oxalate 13 parts.
Preparation method:
(1) by above-mentioned mass parts, nickel powder, copper powder, aluminium powder, zircon sand, zinc powder, alundum (Al2O3), iron powder, boron powder, calcium oxalate mix after pulverizing, and cross 120 eye mesh screens, obtain compound;
(2) step (1) gained compound is adopted powder metallurgy two-way floating pressing process, specific mo(u)lding pressure is 700MPa, compressingly obtains blank;
(3) step (2) gained blank is sintered to 1250 DEG C, sintering pressure is 10Kg/cm
2, take out after insulation 3.5h, namely obtain described powder metallurgical gear with after stove cooling.
Embodiment 5
A kind of powder metallurgical gear, is made up of each component of following mass parts: nickel powder 19 parts, copper powder 8 parts, aluminium powder 9 parts, zircon sand 6 parts, zinc powder 13 parts, alundum (Al2O3) 8 parts, iron powder 42 parts, 6 parts, boron powder, calcium oxalate 10 parts.
Preparation method:
(1) by above-mentioned mass parts, nickel powder, copper powder, aluminium powder, zircon sand, zinc powder, alundum (Al2O3), iron powder, boron powder, calcium oxalate mix after pulverizing, and cross 120 eye mesh screens, obtain compound;
(2) step (1) gained compound is adopted powder metallurgy two-way floating pressing process, specific mo(u)lding pressure is 650MPa, compressingly obtains blank;
(3) step (2) gained blank is sintered to 1200 DEG C, sintering pressure is 9.5Kg/cm
2, take out after insulation 3h, namely obtain described powder metallurgical gear with after stove cooling.
Comparative example
Authorization Notice No. be CN102179519B patent discloses a kind of powder metallurgy transmitting gear, preparation process is: each component raw material of formula rate is carried out Homogeneous phase mixing, and by compressing, pressing pressure is 550 ~ 650MPa; Then sinter, sintering temperature is 1120 ~ 1250 DEG C, and sintering time is 30 ~ 40 minutes, and then room temperature is down in cooling, then carries out fine finishining; Heat-treat operation again: first quench, hardening heat is 850 ~ 900 DEG C, 2.8 ~ 3.2 hours cool times; Carry out tempering again, temperature is 150 ~ 200 DEG C, tempering time 1.8 ~ 2.2 hours, and then cool to room temperature, obtains powder metallurgy transmission gear; The percentage by weight of each component raw material of described formula rate is: nickel 1% ~ 5%, copper 1% ~ 3%, molybdenum 0.5% ~ 2%, graphite 0.5% ~ 0.9%, lubricant 0.6% ~ 0.9%, cutting agent 0.3% ~ 0.5%, and all the other are iron.
Performance test:
The powder metallurgical gear the performance test results that embodiment 1-5 and comparative example obtain is as shown in the table:
| Teeth portion compressive resistance (N) | Teeth portion HRC | 24 hours salt spray tests | |
| Embodiment 1 | 5920 | ≥30 | Occur without red rust |
| Embodiment 2 | 5978 | ≥30 | Occur without red rust |
| Embodiment 3 | 5925 | ≥30 | Occur without red rust |
| Embodiment 4 | 6002 | ≥30 | Occur without red rust |
| Embodiment 5 | 6015 | ≥30 | Occur without red rust |
| Comparative example | 4625 | ≥30 | Part red rust is had to occur |
As can be seen from the above table: the obtained powder metallurgical gear teeth portion compressive resistance of embodiment 1-5 between 5920-6015N, teeth portion HRC all >=within 30,24 hours, occur without red rust after salt spray test; And the powder metallurgical gear teeth portion compressive resistance that comparative example obtains is 4625N, after 24 hours salt spray tests, there is part red rust.It can thus be appreciated that the powder metallurgical gear that the present invention obtains, due to the synergy between component, while teeth portion HRC is high, can improve resistance to compression and salt spray resistance, preparation technology is simple, has good market prospects.
Claims (6)
1. a powder metallurgical gear, it is characterized in that, be made up of the component of following mass parts: nickel powder 12-24 part, copper powder 1-13 part, aluminium powder 5-15 part, zircon sand 2-10 part, zinc powder 8-19 part, alundum (Al2O3) 4-11 part, iron powder 35-51 part, boron powder 3-10 part, calcium oxalate 2-16 part.
2. powder metallurgical gear according to claim 1, it is characterized in that, be made up of the component of following mass parts: nickel powder 15-22 part, copper powder 4-11 part, aluminium powder 7-12 part, zircon sand 5-9 part, zinc powder 10-16 part, alundum (Al2O3) 7-10 part, iron powder 38-46 part, boron powder 4-8 part, calcium oxalate 5-13 part.
3. powder metallurgical gear according to claim 1, it is characterized in that, be made up of the component of following mass parts: nickel powder 19 parts, copper powder 8 parts, aluminium powder 9 parts, zircon sand 6 parts, zinc powder 13 parts, alundum (Al2O3) 8 parts, iron powder 42 parts, 6 parts, boron powder, calcium oxalate 10 parts.
4. the preparation method of the powder metallurgical gear of claims 1 to 3 described in any one, is characterized in that: comprise the following steps:
(1) by above-mentioned mass parts, nickel powder, copper powder, aluminium powder, zircon sand, zinc powder, alundum (Al2O3), iron powder, boron powder, calcium oxalate mix after pulverizing, and sieve, obtain compound;
(2) step (1) gained compound is adopted powder metallurgy two-way floating pressing process, specific mo(u)lding pressure is 550-800MPa, compressingly obtains blank;
(3) step (2) gained blank is sintered to 1100-1300 DEG C, take out after insulation 2-4h, namely obtain described powder metallurgical gear with after stove cooling.
5. the preparation method of powder metallurgical gear according to claim 4, is characterized in that: described step (1) is sieved in process and adopted 80-150 eye mesh screen.
6. the preparation method of powder metallurgical gear according to claim 4, is characterized in that: in described step (3) sintering process, sintering pressure is 8-11Kg/cm
2.
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| CN201510540759.3A CN105149590A (en) | 2015-08-28 | 2015-08-28 | Powder metallurgy gear and manufacturing method thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105750554A (en) * | 2016-02-29 | 2016-07-13 | 苏州莱特复合材料有限公司 | Tough powder metallurgy shaft sleeve and preparation method thereof |
| CN108018444A (en) * | 2017-06-12 | 2018-05-11 | 吉林大学 | A kind of in-situ endogenic nanometer NbB2The preparation method of pottery aluminium composite material |
| CN109692950A (en) * | 2018-11-27 | 2019-04-30 | 汪学军 | Composite metal powder for powder metallurgy |
| CN111304562A (en) * | 2019-12-14 | 2020-06-19 | 江苏时代华宜电子科技有限公司 | High-modulus cast ceramic-aluminum high-purity material and preparation method thereof |
| CN112522632A (en) * | 2020-12-09 | 2021-03-19 | 苏州莱特复合材料有限公司 | Powder metallurgy wear-resistant stator and production process thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105750554A (en) * | 2016-02-29 | 2016-07-13 | 苏州莱特复合材料有限公司 | Tough powder metallurgy shaft sleeve and preparation method thereof |
| CN108018444A (en) * | 2017-06-12 | 2018-05-11 | 吉林大学 | A kind of in-situ endogenic nanometer NbB2The preparation method of pottery aluminium composite material |
| CN108018444B (en) * | 2017-06-12 | 2019-10-18 | 吉林大学 | A kind of in-situ endogenic nanometer NbB2The preparation method of pottery aluminium composite material |
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| CN111304562A (en) * | 2019-12-14 | 2020-06-19 | 江苏时代华宜电子科技有限公司 | High-modulus cast ceramic-aluminum high-purity material and preparation method thereof |
| CN112522632A (en) * | 2020-12-09 | 2021-03-19 | 苏州莱特复合材料有限公司 | Powder metallurgy wear-resistant stator and production process thereof |
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Application publication date: 20151216 |