CN104234770A - Light alloy air valve - Google Patents
Light alloy air valve Download PDFInfo
- Publication number
- CN104234770A CN104234770A CN201310230888.3A CN201310230888A CN104234770A CN 104234770 A CN104234770 A CN 104234770A CN 201310230888 A CN201310230888 A CN 201310230888A CN 104234770 A CN104234770 A CN 104234770A
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- valve
- tial
- light alloy
- titanium
- tib2
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Abstract
The invention relates to a light alloy air valve. The light alloy air valve comprises a [beta] [gamma]-TiAl (Titanium-Aluminum Alloy) valve matrix, wherein the surface of the [beta] [gamma]-TiAl valve matrix is provided with a TiB2 surface layer. The light alloy air valve provided by the invention has the following advantages: 1) The valve is made from a TiAl alloy with high thermoplasticity and formability of [beta] [gamma]-TiAl (Ti45Al9V and the like) in such a method of a hot extrusion blanking + final forging method, therefore the performance of the valve can be improved, and the manufacturing cost of the valve can be reduced; 2) the TiB2 as a surface layer is a ceramic material with high heat resistance, high corrosion resistance, high hardness, high wear resistance, low frictional coefficient and other series performances, and can be formed on a titanium and titanium aluminum based light alloy surface by a chemosmosis method B, therefore the wear resistance and service life of the valve can be improved.
Description
Technical field
The present invention relates to a kind of light alloy valve, relate to engine valve actuating mechanism technical field.
Background technique
Valve, as the very important component of engine interior, should to possess to high rotating speed, high power, low emission, low power consuming future development along with motor and give some: the wear resistance that (1) is good; (2) good heat resistance, good thermal conductivity; (3) still its hardness and intensity can be kept under High Temperature High Pressure, and can be shock-resistant; (4) oxide etch can not be there is under high temperature; (5) valve is lightweight.The working environment of valve is severe especially, the high motion frequency of high temperature (about 2200 degree) high pressure (6-10MPa) height wearing and tearing is (during 3000 revs/min, motor, valve opening and closing 1500 beats/min) common valve is when ambient temperature is more than 900 degree, usability obviously declines, and causes valve significantly to shorten working life.
The existing titanium for the manufacture of valve and the aluminium base light alloy of titanium is also had to mainly contain Ti alloy and TiAl-base alloy.Ti alloy thermoplastic forming is better, but adopts the method for hot extrusion base+finish forging to manufacture valve, and valve manufacture cost is high.TiAl-base alloy due to thermoplastic forming poor, valve manufacture adopt be powder metallurgy process, cost is high.
Because valve is motor sealed combustion chamber and the precision parts controlling engine gas exchange in the course of the work, the sealing pair operating conditions that valve and valve seat are formed is very severe, and the surface treatment of valve is for ensureing that the reliability of motor is most important.The surface treatment method that external titanium and the aluminium base light alloy valve of titanium adopt is plasma carbonizing, depositing Al xCr1-xN coating etc., and its wear-resisting property, decay resistance are desirable not enough, need improve further.
Summary of the invention
The present invention is directed to above-mentioned defect, object is to provide one can improve high engine speeds performance, alleviates valve to the impact of valve seat, wearing and tearing simultaneously, plays a kind of light alloy valve of significant energy-saving and environmental protection effect.
The technical solution used in the present invention is for this reason: the present invention includes beta type gamma-TiAl valve matrix, and beta type gamma-TiAl valve matrix surface establishes TiB2 top layer.
The present invention includes Ti45Al9V valve matrix, Ti45Al9V valve matrix surface establishes TiB2 top layer.
Advantage of the present invention is: 1) the present invention adopts the TiAl-base alloy of beta type gamma-TiAl (Ti45Al9V etc.) high thermoplasticity formability, manufactures the method adopting hot extrusion base+finish forging, improves valve performance, reduces valve manufacture cost; 2) adopt TiB2 as top layer, TiB2 is a kind of stupalith with a series of performances such as high-fire resistance, high corrosion resistance, high hardness, high wear resistance, low coefficient of friction, and the method for B is oozed by chemistry, TiB2 can be formed at titanium and the aluminium base light alloy surface of titanium, improve wear-resisting property and the working life of valve; Make whole valve motion inertia reduce by 40% ~ 50% after testing, reduce high engine speeds running noise 20% ~ 30%, save motor fuel and consume 6% ~ 8%, improve high engine speeds performance.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
In figure, 1 is that beta type gamma-TiAl valve matrix, 2 is for TiB2 top layer.
Embodiment
The present invention includes beta type gamma-TiAl valve matrix 1, TiB2 top layer 2 is established on beta type gamma-TiAl valve matrix 1 surface.
Beta type gamma-TiAl has excellent plasticity, its course of working for: be squeezed into the length of valve blank needed for being become by the pole shape section steel cutting of purchase, put into duplex position extrusion die after carrying out being heated to process stipulation temperature and carry out once-through extruding, adopt mechanism hand that blank one-time formed after depanning is put into finish forging mould rapidly and carry out finish-forging.
Claims (2)
1. a light alloy valve, is characterized in that, comprises beta type gamma-TiAl valve matrix, and beta type gamma-TiAl valve matrix surface establishes TiB2 top layer.
2. a kind of light alloy valve according to claim 1, is characterized in that, comprises Ti45Al9V valve matrix, and Ti45Al9V valve matrix surface establishes TiB2 top layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310230888.3A CN104234770A (en) | 2013-06-10 | 2013-06-10 | Light alloy air valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310230888.3A CN104234770A (en) | 2013-06-10 | 2013-06-10 | Light alloy air valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104234770A true CN104234770A (en) | 2014-12-24 |
Family
ID=52223566
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310230888.3A Pending CN104234770A (en) | 2013-06-10 | 2013-06-10 | Light alloy air valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104234770A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106089349A (en) * | 2016-07-29 | 2016-11-09 | 中国北方发动机研究所(天津) | A kind of electromotor light titanium alloy material valve |
-
2013
- 2013-06-10 CN CN201310230888.3A patent/CN104234770A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106089349A (en) * | 2016-07-29 | 2016-11-09 | 中国北方发动机研究所(天津) | A kind of electromotor light titanium alloy material valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20141224 |