CN103484770A - Heavy truck gearbox synchronizer hub powder metallurgy formula - Google Patents
Heavy truck gearbox synchronizer hub powder metallurgy formula Download PDFInfo
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- CN103484770A CN103484770A CN201310471601.6A CN201310471601A CN103484770A CN 103484770 A CN103484770 A CN 103484770A CN 201310471601 A CN201310471601 A CN 201310471601A CN 103484770 A CN103484770 A CN 103484770A
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Abstract
A heavy truck gearbox synchronizer hub powder metallurgy formula comprises 0.01-0.8wt% of C, 0.5-3wt% of Cu, 2-8wt% of Ni, and the balance Fe powder, or comprises 0.01-0.8wt% of C, 0.5-3wt% of Cu, 2-8wt% of Ni, 0.2-0.8wt% of Mo, 0.1-0.15wt% of MnM, and the balance Fe powder. The formula enables a hub density to be not lower than 6.8g/cm<3>, a hub matrix hardness to be not lower than HRB70 and a high frequency quenching hardness to be above HRA68.
Description
Technical field
The invention belongs to the synchromesh gear hub technical field, particularly a kind of powder metallurgy prescription of heavy type lorry transmission-gear box synchromesh gear hub.
Background technology
Synchromesh gear hub is the important component in wheel box, its complex structure, hardness and tensile strength etc. is all had to very high requirement, especially for heavy truck, the synchromesh gear hub made according to current composition and engineering, be easy to cause the problems such as operation is not smooth, abnormal sound noise, can cause when serious losing efficacy, affected the serviceability of wheel box.
Summary of the invention
In order to overcome the shortcoming of above-mentioned prior art, the object of the present invention is to provide a kind of powder metallurgy prescription of heavy type lorry transmission-gear box synchromesh gear hub, usefulness is higher, is adapted to the various requirement of heavy type lorry transmission-gear box synchromesh gear hub.
To achieve these goals, the technical solution used in the present invention is:
A kind of powder metallurgy prescription of heavy type lorry transmission-gear box synchromesh gear hub is comprised of the raw material of following weighing by weight ratio:
Carbon 0.01-0.8%, copper 0.5-3%, nickel 2-8%, surplus is iron powder.
The another kind of formula of the powder metallurgy of a kind of heavy type lorry transmission-gear box synchromesh gear hub of the present invention is comprised of the raw material of following weighing by weight ratio:
Carbon 0.2-0.9%, copper 1-5%, nickel 1.55-8%, molybdenum 0.2-0.8%, surplus is iron powder.
The another kind of formula of the powder metallurgy of a kind of heavy type lorry transmission-gear box synchromesh gear hub of the present invention is comprised of the raw material of following weighing by weight ratio:
Carbon 0.01-0.8%, copper 0.5-3%, nickel 2-8%, molybdenum 0.2-0.8%, MnM0.1-0.15%, surplus is iron powder.
The another kind of formula of the powder metallurgy of a kind of heavy type lorry transmission-gear box synchromesh gear hub of the present invention is comprised of the raw material of following weighing by weight ratio:
Carbon 0.8%, copper 1.5%, nickel 2.5%, MnM0.15%, lubricant 0.6%, surplus is iron powder.
The alloy iron powder form that described copper, nickel, molybdenum are made with the part diffusion process adds.
Compared with prior art, the invention has the beneficial effects as follows:
1, can make tooth hub density be more than or equal to every cubic centimetre of 6.8 gram, disposable pressed density can reach every cubic centimetre of 6.8-7.2 gram.
2, can make tooth hub matrix hardness be more than or equal to HRB70, more than high-frequency quenching hardness HRA68.
Embodiment
Describe embodiments of the present invention in detail below in conjunction with embodiment.
Embodiment mono-
A kind of powder metallurgy prescription of heavy type lorry transmission-gear box synchromesh gear hub is comprised of the raw material of following weighing by weight ratio: carbon 1%, and copper 1%, nickel 6%, surplus is iron powder.
Its preparation comprises the steps:
A will put into the mould slug press by the raw material powder mixed, and adopt the FY450T mouldenpress, dress powder height: 40 ± 1mm, pressure: 160-180T; Density:>=6.85g/cm
3; Weight: the 190-200 gram, physical dimension:
72.5mm;
B puts into sintering oven, first 950-1050 ℃ of presintering 90min, and then 1100-1120 ℃ of sintering 40-60min under natural gas atmosphere, follow cooling 20-90min.Natural gas atmosphere makes safe, and accessory appearance color even, hardness are even, and dimensional change is little;
C carries out shaping by the multistage stamping machine, uses Three Up Three Down powder metallurgy special die carrier, and pressure: 8-10MPa, make density more even with moving the powder function, guarantees that parts density homogeneity deviation is in 0.15%, male spline size in guaranteeing;
The D machining;
E adopts the Full-automatic high frequency quenching furnance, 860-900 ℃ of high-frequency quenching 5-7 second, heat-treats, and more than hardness can reach HRA68, layer depth: more than 0.5;
The F deburring
G utilizes the fully-automatic supersonic cleaning machine to clean, clear up
The H check.Use three-coordinates measuring machine to check dimensions, use cloth, Rockwell hardness instrument to detect workpiece hardness.
Embodiment bis-
A kind of powder metallurgy prescription of heavy type lorry transmission-gear box synchromesh gear hub is comprised of the raw material of following weighing by weight ratio: carbon 0.01%, and copper 3%, nickel 8%, surplus is iron powder.
Preparation technology is consistent with embodiment mono-.
Embodiment tri-
A kind of powder metallurgy prescription of heavy type lorry transmission-gear box synchromesh gear hub is comprised of the raw material of following weighing by weight ratio: carbon 0.8%, and copper 0.5%, nickel 2%, surplus is iron powder.
Preparation technology is consistent with embodiment mono-.
Embodiment tetra-
A kind of powder metallurgy prescription of heavy type lorry transmission-gear box synchromesh gear hub is comprised of the raw material of following weighing by weight ratio: carbon 0.8%, and copper 0.5%, nickel 2%, molybdenum 0.2%, MnM0.15%, surplus is iron powder.
In preparation technology, the alloy iron powder form that the mixed powder of copper nickel molybdenum is made by diffusion process adds, adopt the Distaloy AB diffusion alloy iron powder of Co., Ltd in He Genasi in the present embodiment, the composition of Distaloy AB powder is Ni, Cu, Mo, its original washing powder is the high purity atomized iron powder, itself be the alloy iron powder, because the single copper powder of tradition, nickel powder, molybdenum powder add, sintering is not easy alloying, hardness is inhomogeneous; MnM is a kind of machining auxiliary agent of Co., Ltd's exploitation in He Genasi.The powder metallurgy machining is usually more difficult, and influence factor is also very complicated.Adding machine processing aid MnM choose suitable cutting tool and machined parameters can greatly improve the machinability of material in mixed powder.Can avoid using the drawback of MnS when (usually adding 0.3-0.5%), prevent that the powdered metal parts surface from forming spot or getting rusty simultaneously.MnM has efficiently (add 0.10-0.15% get final product), part immaculate or the characteristics such as get rusty, and compared to MnS, the material machinability of interpolation MnM is better.Use the mixed powder of precompressed of MnM can save the holistic cost of production, as extended cutter life, the bright and clean immaculate of product surface, and be equally applicable to sinter-hardened product.Simultaneously, adopt MnM to replace traditional MnS, can extend cutter life, enhance productivity, improve piece surface smooth finish, improve dimensional uniformity; Adopt bonding blending processes of powders, mixed powder is even simultaneously.In preparation technology, all the other steps are consistent with embodiment mono-.
Embodiment five
A kind of powder metallurgy prescription of heavy type lorry transmission-gear box synchromesh gear hub is comprised of the raw material of following weighing by weight ratio: carbon 0.01%, and copper 3%, nickel 8%, molybdenum 0.8%, MnM0.1%, surplus is iron powder.
Preparation technology is consistent with embodiment tetra-.
Embodiment six
A kind of powder metallurgy prescription of heavy type lorry transmission-gear box synchromesh gear hub is comprised of the raw material of following weighing by weight ratio: carbon 1%, and copper 1%, nickel 5%, molybdenum 0.5%, MnM0.12%, surplus is iron powder.
Preparation technology is consistent with embodiment tetra-.
Embodiment seven
A kind of powder metallurgy prescription of heavy type lorry transmission-gear box synchromesh gear hub is comprised of the raw material of following weighing by weight ratio: carbon 0.8%, and copper 1.5%, nickel 2.5%, MnM0.15%, lubricant 0.6%, surplus is iron powder.
Preparation technology is consistent with embodiment tetra-.
In the present invention, when the carbon ratio example when following, belongs to low-carbon alloy 0.7%, need to carry out carburizing and quenching, the carbon ratio example when above, belongs to high carbon alloy 0.7%, need to carry out high-frequency quenching.
Embodiment eight
A kind of powder metallurgy prescription of heavy type lorry transmission-gear box synchromesh gear hub is comprised of the raw material of following weighing by weight ratio: carbon 0.2%, and copper 5%, nickel 1.55%, molybdenum 0.2%, surplus is iron powder.
Embodiment nine
A kind of powder metallurgy prescription of heavy type lorry transmission-gear box synchromesh gear hub is comprised of the raw material of following weighing by weight ratio: carbon 0.9%, and copper 1%, nickel 8%, molybdenum 0.8%, surplus is iron powder.
Embodiment ten
A kind of powder metallurgy prescription of heavy type lorry transmission-gear box synchromesh gear hub is comprised of the raw material of following weighing by weight ratio: carbon 0.4%, and copper 2%, nickel 3.56%, molybdenum 0.46%, surplus is iron powder.
Claims (6)
1. the powder metallurgy prescription of a heavy type lorry transmission-gear box synchromesh gear hub, is characterized in that, the raw material of following weighing by weight ratio, consists of:
Carbon 0.01-0.8%, copper 0.5-3%, nickel 2-8%, surplus is iron powder.
2. the powder metallurgy prescription of a heavy type lorry transmission-gear box synchromesh gear hub, is characterized in that, the raw material of following weighing by weight ratio, consists of:
Carbon 1%, copper 1%, nickel 6%, surplus is iron powder.
3. the powder metallurgy prescription of a heavy type lorry transmission-gear box synchromesh gear hub, is characterized in that, the raw material of following weighing by weight ratio, consists of:
Carbon 0.2-0.9%, copper 1-5%, nickel 1.55-8%, molybdenum 0.2-0.8%, surplus is iron powder.
4. the powder metallurgy prescription of a heavy type lorry transmission-gear box synchromesh gear hub, is characterized in that, the raw material of following weighing by weight ratio, consists of:
Carbon 0.01-0.8%, copper 0.5-3%, nickel 2-8%, molybdenum 0.2-0.8%, MnM0.1-0.15%, surplus is iron powder.
5. the powder metallurgy prescription of heavy type lorry transmission-gear box synchromesh gear hub according to claim 4, is characterized in that, the alloy iron powder form that described copper, nickel, molybdenum are made with the part diffusion process adds.
6. the powder metallurgy prescription of a heavy type lorry transmission-gear box synchromesh gear hub, is characterized in that, the raw material of following weighing by weight ratio, consists of:
Carbon 0.8%, copper 1.5%, nickel 2.5%, MnM0.15%, lubricant 0.6%, surplus is iron powder.
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| CN201310471601.6A CN103484770A (en) | 2013-10-10 | 2013-10-10 | Heavy truck gearbox synchronizer hub powder metallurgy formula |
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| CN201310471601.6A CN103484770A (en) | 2013-10-10 | 2013-10-10 | Heavy truck gearbox synchronizer hub powder metallurgy formula |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105149568A (en) * | 2015-08-31 | 2015-12-16 | 苏州莱特复合材料有限公司 | Powder metallurgy synchronizer hub and preparation method thereof |
| CN107812948A (en) * | 2017-11-08 | 2018-03-20 | 江苏智造新材有限公司 | A kind of processing method of powder metallurgy synchronizer tooth hub |
| CN109852897A (en) * | 2018-12-28 | 2019-06-07 | 江苏智造新材有限公司 | A kind of method for preparing powder metallurgy of double clutch large torque automatic gear-box synchromesh gear hubs |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1755810A2 (en) * | 2004-05-12 | 2007-02-28 | Höganäs Ab | Iron-based gear wheels produced by a process comprising uniaxially compacting, sintering and surface densifying |
| CN102335746A (en) * | 2011-09-26 | 2012-02-01 | 吕元之 | Powder metallurgy sedan synchronizer gear hub and production method thereof |
| CN103182510A (en) * | 2013-03-07 | 2013-07-03 | 兴城市粉末冶金有限公司 | Processing technology for powder metallurgy gear hub |
-
2013
- 2013-10-10 CN CN201310471601.6A patent/CN103484770A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1755810A2 (en) * | 2004-05-12 | 2007-02-28 | Höganäs Ab | Iron-based gear wheels produced by a process comprising uniaxially compacting, sintering and surface densifying |
| EP1755810B1 (en) * | 2004-05-12 | 2009-02-25 | Höganäs Ab | Iron-based gear wheels produced by a process comprising uniaxially compacting, sintering and surface densifying |
| CN102335746A (en) * | 2011-09-26 | 2012-02-01 | 吕元之 | Powder metallurgy sedan synchronizer gear hub and production method thereof |
| CN103182510A (en) * | 2013-03-07 | 2013-07-03 | 兴城市粉末冶金有限公司 | Processing technology for powder metallurgy gear hub |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105149568A (en) * | 2015-08-31 | 2015-12-16 | 苏州莱特复合材料有限公司 | Powder metallurgy synchronizer hub and preparation method thereof |
| CN107812948A (en) * | 2017-11-08 | 2018-03-20 | 江苏智造新材有限公司 | A kind of processing method of powder metallurgy synchronizer tooth hub |
| CN109852897A (en) * | 2018-12-28 | 2019-06-07 | 江苏智造新材有限公司 | A kind of method for preparing powder metallurgy of double clutch large torque automatic gear-box synchromesh gear hubs |
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Application publication date: 20140101 |