CN104342597A - Self-lubricating valve guide pipe alloy material and preparation method thereof - Google Patents
Self-lubricating valve guide pipe alloy material and preparation method thereof Download PDFInfo
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- CN104342597A CN104342597A CN201410678886.5A CN201410678886A CN104342597A CN 104342597 A CN104342597 A CN 104342597A CN 201410678886 A CN201410678886 A CN 201410678886A CN 104342597 A CN104342597 A CN 104342597A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
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- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Lift Valve (AREA)
Abstract
The invention discloses a self-lubricating valve guide pipe alloy material and a preparation method thereof. The alloy material consists of the following elements in percentage by weight: 70 to 85 percent of Fe, 7 to 11 percent of Zn, 1 to 2.5 percent of lanthanum-cerium misch metal, 0.5 to 2.5 percent of Pd and the balance of inevitable impurities. The preparation method comprises the following operating steps of weighing the Fe, the Zn and the Pd according to a formula and sequentially putting the Fe, the Zn and the Pd into a medium-frequency induction furnace; after the Fe, the Zn and the Pd are molten, adding the lanthanum-cerium misch metal for pre-smelting alloy; adopting a spray forming device, melting the alloy again and performing supersonic airflow spray deposition to obtain the self-lubricating valve guide pipe alloy. The alloy material and the preparation method have the beneficial effect that a valve guide pipe prepared from the alloy material has the advantages of self-lubrication, high fatigue strength, high wear resistance and long service life.
Description
Technical field
The present invention relates to powder metallurgical technology, be specifically related to a kind of self-lubricating valve guide bushing alloy material and preparation method thereof.
Background technology
Valve guide bushing is the liner of automotive engine valves, valve is play the guiding role, and make the heat on valve stem pass to cylinder head through valve guide bushing, during valve guide bushing work, temperature is higher, lubricate poor, the cast iron that general use graphitiferous is higher is made, but its fatigue strength and wear resistance not high enough, fragile.
Summary of the invention
The object of this invention is to provide a kind of self-lubricating, fatigue strength be high, wear resistance good, valve guide bushing alloy material that the life-span is long and preparation method thereof.
In order to solve the problem existing for background technology, the present invention is by the following technical solutions: a kind of self-lubricating valve guide bushing alloy material, and described alloy material is elementary composition by following weight percent: Fe70% ~ 85%; Zn7% ~ 11%; Mixed rare earth of lanthanum and cerium metal 1% ~ 2.5%; Pd0.5% ~ 2.5%; Surplus is inevitable impurity.
Further, the weight percent of described mixed rare earth of lanthanum and cerium metal consists of: Ce42.4% ~ 47.5%, La16.5% ~ 31.3%, Pr4.2% ~ 8.3%, Nd9.5% ~ 17.1%, B0.05% ~ 0.4%.
Further, the purity of described raw material Fe is 99.9%; The purity of raw material Zn is 99.9%; The purity of raw material lead is 99.9%.
Further, the concrete operation step of its preparation method is as follows:
1, take described Fe, Zn, Pd of formula ratio and be placed in medium-frequency induction furnace successively, after described Fe, Zn, Pd fusing, then add the presmelting that mixed rare earth of lanthanum and cerium metal carries out alloy, the temperature of described presmelting is 1400 ~ 1500 DEG C, time 20 ~ 40min, stirs 4 ~ 15 times in process;
2, jet shaper is adopted, again after being melted by above-mentioned alloy, carry out supersonic airstream spray deposition, the gas flow of described supersonic airstream spray deposition is 600 ~ 1000L/min, spray deposition distance is 30 ~ 100cm, obtained described self-lubricating valve guide bushing alloy.
Further, in described step 2, atomizing gas is adopted as nitrogen, argon gas or nitrogen-argon mixture gas.
The present invention has following beneficial effect: the advantage that the valve guide bushing produced by alloy material provided by the invention has self-lubricating, fatigue strength is high, wear resistance good, the life-span is long.
Embodiment
The present invention will be further described in detail below.
Embodiment one:
Each elementary composition according to Fe70% in a kind of self-lubricating valve guide bushing alloy material; Zn11%; Mixed rare earth of lanthanum and cerium metal 2%; Pd2.5%; Surplus is inevitable impurity.Wherein, the weight percent of described mixed rare earth of lanthanum and cerium metal consists of: Ce43.4%, La31.3%, Pr8.3%, Nd17.1%, B0.1%.
The concrete operation step of its preparation method is as follows:
1, the purity taking formula ratio is Fe, Zn, Pd described in 99.9% and is placed in medium-frequency induction furnace successively, after described Fe, Zn, Pd fusing, then add the presmelting that mixed rare earth of lanthanum and cerium metal carries out alloy, the temperature of described presmelting is 1440 DEG C, time 40min, stirs 15 times in process;
2, adopt jet shaper, after again being melted by above-mentioned alloy, carry out supersonic airstream spray deposition, the gas flow of described supersonic airstream spray deposition is 600L/min, and spray deposition distance is 30cm, obtained described self-lubricating valve guide bushing alloy.
Embodiment two:
Respectively in a kind of self-lubricating valve guide bushing alloy material be elementary compositionly: Fe80%; Zn7%; Mixed rare earth of lanthanum and cerium metal 2.5%; Pd0.5%; Surplus is inevitable impurity.Wherein, the weight percent of described mixed rare earth of lanthanum and cerium metal consists of: Ce47.5%, La31.3%, Pr8.3%, Nd12.5%, B0.4%.
The concrete operation step of its preparation method is as follows:
1, the purity taking formula ratio is Fe, Zn, Pd described in 99.9% and is placed in medium-frequency induction furnace successively, after described Fe, Zn, Pd fusing, then add the presmelting that mixed rare earth of lanthanum and cerium metal carries out alloy, the temperature of described presmelting is 1480 DEG C, time 30min, stirs 10 times in process;
2, adopt jet shaper, after again being melted by above-mentioned alloy, carry out supersonic airstream spray deposition, the gas flow of described supersonic airstream spray deposition is 800L/min, and spray deposition distance is 70cm, obtained described self-lubricating valve guide bushing alloy.
Embodiment three:
Respectively in a kind of self-lubricating valve guide bushing alloy material be elementary compositionly: Fe85%; Zn10%; Mixed rare earth of lanthanum and cerium metal 1%; Pd2%; Surplus is inevitable impurity.Wherein, the weight percent of described mixed rare earth of lanthanum and cerium metal consists of: Ce47.5%, La29.9%, Pr4.2%, Nd17.1%, B0.3%.
The concrete operation step of its preparation method is as follows:
1, the purity taking formula ratio is Fe, Zn, Pd described in 99.9% and is placed in medium-frequency induction furnace successively, after described Fe, Zn, Pd fusing, then add the presmelting that mixed rare earth of lanthanum and cerium metal carries out alloy, the temperature of described presmelting is 1500 DEG C, time 20min, stirs 8 times in process;
2, adopt jet shaper, after again being melted by above-mentioned alloy, carry out supersonic airstream spray deposition, the gas flow of described supersonic airstream spray deposition is 1000L/min, and spray deposition distance is 100cm, obtained described self-lubricating valve guide bushing alloy.
What finally illustrate is, above embodiment is only in order to illustrate technical scheme of the present invention and unrestricted, other amendments that those of ordinary skill in the art make technical scheme of the present invention or equivalently to replace, only otherwise depart from the spirit and scope of technical solution of the present invention, all should be encompassed in the middle of right of the present invention.
Claims (5)
1. a self-lubricating valve guide bushing alloy material, is characterized in that, described alloy material is elementary composition by following weight percent: Fe70% ~ 85%; Zn7% ~ 11%; Mixed rare earth of lanthanum and cerium metal 1% ~ 2.5%; Pd0.5% ~ 2.5%; Surplus is inevitable impurity.
2. a kind of self-lubricating valve guide bushing alloy material according to claim 1, it is characterized in that, the weight percent of described mixed rare earth of lanthanum and cerium metal consists of: Ce42.4% ~ 47.5%, La16.5% ~ 31.3%, Pr4.2% ~ 8.3%, Nd9.5% ~ 17.1%, B0.05% ~ 0.4%.
3. a kind of self-lubricating valve guide bushing alloy material according to claim 1, is characterized in that, the purity of described raw material Fe is 99.9%; The purity of raw material Zn is 99.9%; The purity of raw material lead is 99.9%.
4. the preparation method of a kind of self-lubricating valve guide bushing alloy material according to any one of claim 1-3, it is characterized in that, its concrete operation step is as follows:
(1) take described Fe, Zn, Pd of formula ratio and be placed in medium-frequency induction furnace successively, after described Fe, Zn, Pd fusing, add the presmelting that mixed rare earth of lanthanum and cerium metal carries out alloy again, the temperature of described presmelting is 1400 ~ 1500 DEG C, time 20 ~ 40min, stirs 4 ~ 15 times in process;
(2) jet shaper is adopted, again after being melted by above-mentioned alloy, carry out supersonic airstream spray deposition, the gas flow of described supersonic airstream spray deposition is 600 ~ 1000L/min, spray deposition distance is 30 ~ 100cm, obtained described self-lubricating valve guide bushing alloy.
5. the preparation method of a kind of self-lubricating valve guide bushing alloy material according to claim 4, is characterized in that, in described step (2), atomizing gas is adopted as nitrogen, argon gas or nitrogen-argon mixture gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410678886.5A CN104342597A (en) | 2014-11-24 | 2014-11-24 | Self-lubricating valve guide pipe alloy material and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410678886.5A CN104342597A (en) | 2014-11-24 | 2014-11-24 | Self-lubricating valve guide pipe alloy material and preparation method thereof |
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| CN104342597A true CN104342597A (en) | 2015-02-11 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5672154A (en) * | 1979-11-15 | 1981-06-16 | Hitachi Powdered Metals Co Ltd | Sintered iron sliding member |
| EP0481763A1 (en) * | 1990-10-18 | 1992-04-22 | Hitachi Powdered Metals Co., Ltd. | Sintered metal parts and their production method |
| CN101981302A (en) * | 2009-03-12 | 2011-02-23 | 新日本制铁株式会社 | Process for producing common rail, and common rail |
| US20110091344A1 (en) * | 2009-10-15 | 2011-04-21 | Christopherson Jr Denis Boyd | Iron-based sintered powder metal for wear resistant applications |
| CN102102161A (en) * | 2009-12-21 | 2011-06-22 | 日立粉末冶金株式会社 | Sintered valve guide and a method of making a sintered valve guide |
| CN102189262A (en) * | 2011-04-26 | 2011-09-21 | 常熟市双月机械有限公司 | Valve guide pipe |
-
2014
- 2014-11-24 CN CN201410678886.5A patent/CN104342597A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5672154A (en) * | 1979-11-15 | 1981-06-16 | Hitachi Powdered Metals Co Ltd | Sintered iron sliding member |
| EP0481763A1 (en) * | 1990-10-18 | 1992-04-22 | Hitachi Powdered Metals Co., Ltd. | Sintered metal parts and their production method |
| CN101981302A (en) * | 2009-03-12 | 2011-02-23 | 新日本制铁株式会社 | Process for producing common rail, and common rail |
| US20110091344A1 (en) * | 2009-10-15 | 2011-04-21 | Christopherson Jr Denis Boyd | Iron-based sintered powder metal for wear resistant applications |
| CN102102161A (en) * | 2009-12-21 | 2011-06-22 | 日立粉末冶金株式会社 | Sintered valve guide and a method of making a sintered valve guide |
| CN102189262A (en) * | 2011-04-26 | 2011-09-21 | 常熟市双月机械有限公司 | Valve guide pipe |
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