CN103551577A - Power metallurgy automobile connecting bar and production method thereof - Google Patents
Power metallurgy automobile connecting bar and production method thereof Download PDFInfo
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- CN103551577A CN103551577A CN201310472097.1A CN201310472097A CN103551577A CN 103551577 A CN103551577 A CN 103551577A CN 201310472097 A CN201310472097 A CN 201310472097A CN 103551577 A CN103551577 A CN 103551577A
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Abstract
The invention discloses a power metallurgy automobile connecting bar. The power metallurgy automobile connecting bar is characterized by being made with, by weight, 81-82 parts of iron powder, 0.8-1.2 parts of yttrium, 1.8-2.2 parts of graphite, 4.1-4.5 parts of Ti, 2.1-2.3 parts of Sr, 1.0-1.4 parts of Bi, 0.3-0.5 part of Ta, 0.1-0.3 part of Nd, and 2-3 parts of aid. The aid is added, so that alloy powder disperses evenly, lengthwise and breadthwise uniformity of the inside structure of products is guaranteed, and the fatigue lives of the products are prolonged; the graphite is added, wear resistance and lubricity of the connecting bar are improved, the produced products are compact in structure and good in microstructure, have few pores, and are excellent in structural rigidity, hardness, fatigue resistance and tensile strength.
Description
Technical field
The present invention relates to field of powder metallurgy, particularly a kind of powder metallurgy automobile connecting rod and preparation method thereof.
Background technology
Engine is the heart of automobile, and connecting rod is the strength member of engine.Conventional production method is to adopt alloy steel casting after Forging Technology, and machining forms engine link.Due to connecting rod complex geometry, in production process, machining amount is very large, and percent defective is higher, thereby manufacturing cost is high.
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, produce the industrial technology of metal material, composite and all kinds goods.At present, PM technique has been widely used in the fields such as traffic, machinery, electronics, Aero-Space, weapons, biology, new forms of energy, information and nuclear industry, becomes one of branch of tool development vitality in new material science.That PM technique possesses is significantly energy-conservation, economize material, excellent performance, Product Precision is high and the series of advantages such as good stability, is very suitable for producing in enormous quantities.In addition, part material and the also available PM technique manufacture of complex parts that with conventional cast method and machining process, cannot prepare, thereby enjoy the attention of industrial quarters.Powder metallurgy structural part product material composition is not limited by melting, both can add alloying component, can add other structural constituent yet, and adjusts as requested in sizable scope, and then can reach the effect of mating with steel part in mechanical property.
Powder metallurgy mechanization degree is high, can reduce personnel, can raise the efficiency again, so that cost-saving.PM technique can replace traditional manufacturing process, for the vast traditional forms of enterprises cost-saving.
So study the formula of the powder metallurgy of various components of machine, adapt to different needs, have great importance.
Summary of the invention
The object of this invention is to provide a kind of powder metallurgy automobile connecting rod and preparation method thereof.
In order to realize object of the present invention, the present invention passes through following scheme implementation:
A connecting rod, is made by the raw material of following weight portion: iron powder 81-82, yttrium 0.8-1.2, graphite 1.8-2.2, Ti 4.1-4.5, Sr 2.1-2.3, Bi 1.0-1.4, Ta 0.3-0.5, Nd 0.1-0.3, auxiliary agent 2-3;
Described auxiliary agent is made by the raw material of following weight portion: iron powder 30-40, kaolin 2-3, alum 1-2, nano-sized carbon 1-2, polyisobutene 2-3, aluminate coupling agent DL-411 1-2, sodium phosphate trimer 2-3, castor oil acid 1-2, aluminum nitride powder 2-3; Preparation method mixes iron powder, kaolin, alum, sodium phosphate trimer, grind to form 200-300 order powder, then add aluminate coupling agent DL-411 to mix, under 10-15Mpa, be pressed into blank, then, send at 920-950 ℃ and calcine 3-4 hour, cooling after, be ground into 300-400 order powder, mix with other residual components, be heated to 60-70 ℃, under 1200-1500 rev/min, stir 1-2 hour, obtain.
Powder metallurgy automobile connecting rod of the present invention, by following concrete steps, made:
(1) iron powder 81-82, yttrium, Ti, Sr, Bi are mixed, add in suitable quantity of water, send into ball milling in ball mill, obtain 250-400 order powder, then, spraying is dry, oven dry, under 12-15Mpa pressure, is pressed into bulk, then under nitrogen protection atmosphere 600-750 ℃ carry out sintering 8-10 hour, will be after the crushing material after sintering cross 200-400 mesh sieve;
(2) other residual components is mixed;
(3) at 62-66 ℃, after mixing and stirring 70-90 minute, pack step (1), (2) material into mould, be pressed into base;
(4) pressed compact is placed in sintering furnace, with 8-12 ℃/min of speed, is warming up to sintering 1-2 hour under 450-550 ℃ of condition, then be warming up to sintering 1.5-2 hour under 800-850 ℃ of condition with 6-8 ℃/min of speed; Then with 5-7 ℃/min of speed, be warming up to sintering 2-3 hour under 1050-1150 ℃ of condition; In air, be cooled to room temperature.
The present invention adds auxiliary agent, and alloy powder is uniformly dispersed, and guarantees the uniformity in length and breadth of interiors of products institutional framework, and increased the fatigue life of product; The present invention adds graphite, has increased wearability and the lubricity of connecting rod, the product dense structure of manufacture, and microstructure is good, and seldom, the rigidity of structure, hardness, fatigue performance, tensile strength properties are good for hole.
Specific embodiments
Below by instantiation, the present invention is described in detail.
A connecting rod, by following weight portion (kilogram) raw material make: iron powder 81, yttrium 0.8, graphite 1.8, Ti 4.1, Sr 2.1, Bi 1.0, Ta 0.3, Nd 0.1, auxiliary agent 2;
Described auxiliary agent by following weight portion (kilogram) raw material make: iron powder 30, kaolin 2, alum 1, nano-sized carbon 1, polyisobutene 2, aluminate coupling agent DL-411 1, sodium phosphate trimer 2, castor oil acid 1, aluminum nitride powder 2; Preparation method mixes iron powder, kaolin, alum, sodium phosphate trimer, grind to form 200-300 order powder, then add aluminate coupling agent DL-411 to mix, under 10-15Mpa, be pressed into blank, then, send at 920-950 ℃ and calcine 3-4 hour, cooling after, be ground into 300-400 order powder, mix with other residual components, be heated to 60-70 ℃, under 1200-1500 rev/min, stir 1-2 hour, obtain.
Powder metallurgy automobile connecting rod of the present invention, by following concrete steps, made:
(1) iron powder 81-82, yttrium, Ti, Sr, Bi are mixed, add in suitable quantity of water, send into ball milling in ball mill, obtain 250-400 order powder, then, spraying is dry, oven dry, under 12-15Mpa pressure, is pressed into bulk, then under nitrogen protection atmosphere 600-750 ℃ carry out sintering 8-10 hour, will be after the crushing material after sintering cross 200-400 mesh sieve;
(2) other residual components is mixed;
(3) at 62-66 ℃, after mixing and stirring 70-90 minute, pack step (1), (2) material into mould, be pressed into base;
(4) pressed compact is placed in sintering furnace, with 8-12 ℃/min of speed, is warming up to sintering 1-2 hour under 450-550 ℃ of condition, then be warming up to sintering 1.5-2 hour under 800-850 ℃ of condition with 6-8 ℃/min of speed; Then with 5-7 ℃/min of speed, be warming up to sintering 2-3 hour under 1050-1150 ℃ of condition; In air, be cooled to room temperature.
Through detection, hardness of the present invention: HRC54; Tensile strength: 1180MPa.
Claims (2)
1. a powder metallurgy automobile connecting rod, it is characterized in that, by the raw material of following weight portion, made: iron powder 81-82, yttrium 0.8-1.2, graphite 1.8-2.2, Ti 4.1-4.5, Sr 2.1-2.3, Bi 1.0-1.4, Ta 0.3-0.5, Nd 0.1-0.3, auxiliary agent 2-3;
Described auxiliary agent is made by the raw material of following weight portion: iron powder 30-40, kaolin 2-3, alum 1-2, nano-sized carbon 1-2, polyisobutene 2-3, aluminate coupling agent DL-411 1-2, sodium phosphate trimer 2-3, castor oil acid 1-2, aluminum nitride powder 2-3; Preparation method mixes iron powder, kaolin, alum, sodium phosphate trimer, grind to form 200-300 order powder, then add aluminate coupling agent DL-411 to mix, under 10-15Mpa, be pressed into blank, then, send at 920-950 ℃ and calcine 3-4 hour, cooling after, be ground into 300-400 order powder, mix with other residual components, be heated to 60-70 ℃, under 1200-1500 rev/min, stir 1-2 hour, obtain.
2. powder metallurgy automobile connecting rod according to claim 1, is characterized in that, by following concrete steps, is made:
(1) iron powder 81-82, yttrium, Ti, Sr, Bi are mixed, add in suitable quantity of water, send into ball milling in ball mill, obtain 250-400 order powder, then, spraying is dry, oven dry, under 12-15Mpa pressure, is pressed into bulk, then under nitrogen protection atmosphere 600-750 ℃ carry out sintering 8-10 hour, will be after the crushing material after sintering cross 200-400 mesh sieve;
(2) other residual components is mixed;
(3) at 62-66 ℃, after mixing and stirring 70-90 minute, pack step (1), (2) material into mould, be pressed into base;
(4) pressed compact is placed in sintering furnace, with 8-12 ℃/min of speed, is warming up to sintering 1-2 hour under 450-550 ℃ of condition, then be warming up to sintering 1.5-2 hour under 800-850 ℃ of condition with 6-8 ℃/min of speed; Then with 5-7 ℃/min of speed, be warming up to sintering 2-3 hour under 1050-1150 ℃ of condition; In air, be cooled to room temperature.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310472097.1A CN103551577A (en) | 2013-10-11 | 2013-10-11 | Power metallurgy automobile connecting bar and production method thereof |
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| CN201310472097.1A CN103551577A (en) | 2013-10-11 | 2013-10-11 | Power metallurgy automobile connecting bar and production method thereof |
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| CN103551577A true CN103551577A (en) | 2014-02-05 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104651755A (en) * | 2015-03-09 | 2015-05-27 | 苏州圣谱拉新材料科技有限公司 | Preparation method of iron-based powder metallurgy material |
| CN105945288A (en) * | 2016-04-28 | 2016-09-21 | 昌利锻造有限公司 | Expansion-breaking connecting rod for powder metallurgy |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1036800A (en) * | 1988-04-05 | 1989-11-01 | 三井石油化学工业株式会社 | Be used for the constituent that moulded product is produced |
| CN101407889A (en) * | 2008-11-21 | 2009-04-15 | 海安县鹰球集团有限公司 | Powder metallurgy rare earth copper coated ferroalloy oil-retaining bearing and manufacturing method thereof |
| CN102015163A (en) * | 2005-01-10 | 2011-04-13 | H.C.施塔克股份有限公司 | Metallic powder mixtures |
-
2013
- 2013-10-11 CN CN201310472097.1A patent/CN103551577A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1036800A (en) * | 1988-04-05 | 1989-11-01 | 三井石油化学工业株式会社 | Be used for the constituent that moulded product is produced |
| CN102015163A (en) * | 2005-01-10 | 2011-04-13 | H.C.施塔克股份有限公司 | Metallic powder mixtures |
| CN101407889A (en) * | 2008-11-21 | 2009-04-15 | 海安县鹰球集团有限公司 | Powder metallurgy rare earth copper coated ferroalloy oil-retaining bearing and manufacturing method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104651755A (en) * | 2015-03-09 | 2015-05-27 | 苏州圣谱拉新材料科技有限公司 | Preparation method of iron-based powder metallurgy material |
| CN105945288A (en) * | 2016-04-28 | 2016-09-21 | 昌利锻造有限公司 | Expansion-breaking connecting rod for powder metallurgy |
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Application publication date: 20140205 |