CN103498711A - Air valve with alloy arranged on plate conical face in bead-weld mode and nitride layer reserved on alloy layer - Google Patents
Air valve with alloy arranged on plate conical face in bead-weld mode and nitride layer reserved on alloy layer Download PDFInfo
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- CN103498711A CN103498711A CN201310495086.5A CN201310495086A CN103498711A CN 103498711 A CN103498711 A CN 103498711A CN 201310495086 A CN201310495086 A CN 201310495086A CN 103498711 A CN103498711 A CN 103498711A
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Abstract
The invention discloses an air valve with alloy arranged on a plate conical face in a bead-weld mode and a nitride layer reserved on an alloy layer, belongs to engine parts, and particularly relates to the air inlet/exhaust air valve of an internal combustion engine. The air valve with the alloy arranged on the plate conical face in the bead-weld mode and the nitride layer reserved on the alloy layer comprises an air valve rod portion, an air valve head portion, a lock clamping groove of the air valve rod portion and the plate conical face of the air valve head portion. The air valve is characterized in that the iron base alloy layer is arranged on the plate conical face of the air valve in the bead-weld mode, and the nitride layer on the plate conical face is arranged on the whole outer surface of the air valve. Due to the fact that iron atoms can be combined with carbon atoms and nitride atoms, after liquid tufftriding, the layer of nitride layer can be formed on the iron base alloy layer of the plate conical face as other parts on the outer surface of the air valve, and the thickness of the nitride layer is more than 0.02mm. The rigidity range of the surface layer of cobalt-base alloy or nickel-base alloy is HV360-480, the rigidity of the surface layer of the iron-base alloy after nitriding can reach HV600-700, the rigidity is greatly increased, abrasion resistance is enhanced, and the working condition requirements of the engine are completely met.
Description
Technical field
The invention belongs to engine component, particularly explosive motor intake and exhaust valve.
Background technique
Valve is a key components and parts of engine valve actuating mechanism, its in the course of the work the valve retainer conical surface directly with air valve seat ring, contact, and while bearing fuel combustion the washing away of the high temperature that forms and corrosive gas, hardness and the wear resistance of therefore coiling the conical surface are considerable.In order to improve hardness and the wear resistance of the dish conical surface, usual way has at dish conical surface hardfacing alloy, or the dish conical surface retains nitride layer but do not carry out hardfacing alloy.Built-up welding alloy powder used mostly is cobalt-based or Ni-based, expensive, and, owing to being cobalt-based or Ni-based alloy, when liquid tufftriding is processed, the dish conical surface does not produce nitride layer, and carbon, nitrogen-atoms are not combined with cobalt or nickle atom, can ooze.
Summary of the invention
In order to overcome after built-up welding cobalt-based on the valve retainer conical surface or nickel-base alloy the deficiency that can not produce nitride layer, the invention provides a kind of valve that coils conical surface hardfacing alloy and retain nitride layer on alloy-layer, this dish conical surface hardfacing alloy the valve that retains nitride layer on alloy-layer not only chase after built-up welding on card at valve the ferrous alloy layer, and maintains nitride layer outside the ferrous alloy layer.
The technical solution adopted for the present invention to solve the technical problems is: a kind of valve that coils conical surface hardfacing alloy and retain nitride layer on alloy-layer, comprise the rod slot of engine valve stem, valve head, engine valve stem and the dish conical surface of valve head, it is characterized in that: on the valve retainer conical surface, built-up welding has the ferrous alloy layer, and the whole outer surface of valve comprises on the dish conical surface nitride layer.
Described ferrous alloy layer thickness is at >=0.5mm, described nitride layer thickness >=0.02mm.
Dish conical surface hardfacing alloy also retains the making method of the valve of nitride layer on alloy-layer, it is characterized in that: carry out the built-up welding ferrous alloy on the valve retainer conical surface, form the ferrous alloy layer of thickness >=0.5mm, after the built-up welding ferrous alloy, valve is after processing, finally carry out the liquid tufftriding processing, on valve retainer conical surface built-up welding ferrous alloy layer and the nitride layer that forms thickness >=0.02mm on the whole outer surface of valve.
Because iron atom can combine with carbon, nitrogen-atoms, after liquid tufftriding, on dish conical surface ferrous alloy layer, will form equally one deck nitride layer in other positions of gentle door exterior surface in the present invention, nitride layer thickness is more than 0.02mm.Cobalt-based or nickel-base alloy surface hardness scope are at HV360-480, and after the ferrous alloy nitrogenize, surface hardness can reach HV600-700, and hardness increases substantially, and has increased wear resistance, has met the working condition requirement of motor fully.
The invention has the beneficial effects as follows at valve retainer conical surface built-up welding ferrous alloy and retain nitride layer, having improved hardness and the wear resistance of the valve retainer conical surface, having met the requirement of motor to valve.
The accompanying drawing explanation
Fig. 1 is structural representation of the present invention,
The mid-game conical surface partial enlarged drawing that Fig. 2 is Fig. 1.
In figure, 1. the valve retainer conical surface, 2. ferrous alloy layer, 3. nitride layer, 4. valve head, 5. engine valve stem, 6. valve collet groove.
Embodiment
The specific embodiment of the present invention is, as shown in the figure:
Embodiment 1, a kind of valve that coils conical surface hardfacing alloy and retain nitride layer on alloy-layer, comprise the rod slot 6 of engine valve stem 5, valve head 4, engine valve stem and the dish conical surface of valve head, it is characterized in that: on the valve retainer conical surface 1, built-up welding has ferrous alloy layer 2, and the whole outer surface of valve comprises on the dish conical surface nitride layer 3.
Described ferrous alloy layer thickness is at >=0.5mm, described nitride layer thickness >=0.02mm.
Claims (3)
1. a valve that coils conical surface hardfacing alloy and retain nitride layer on alloy-layer, comprise the rod slot of engine valve stem, valve head, engine valve stem and the dish conical surface of valve head, it is characterized in that: on the valve retainer conical surface, built-up welding has the ferrous alloy layer, and the whole outer surface of valve comprises on the dish conical surface nitride layer.
2. dish conical surface hardfacing alloy according to claim 1 retain the valve of nitride layer on alloy-layer is characterized in that: described ferrous alloy layer thickness is at >=0.5mm, described nitride layer thickness >=0.02mm.
3. dish conical surface hardfacing alloy claimed in claim 1 retain the making method of the valve of nitride layer on alloy-layer, it is characterized in that: carry out the built-up welding ferrous alloy on the valve retainer conical surface, form the ferrous alloy layer of thickness >=0.5mm, after the built-up welding ferrous alloy, valve is after processing, finally carry out the liquid tufftriding processing, on valve retainer conical surface built-up welding ferrous alloy layer and the nitride layer that forms thickness >=0.02mm on the whole outer surface of valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310495086.5A CN103498711A (en) | 2013-10-21 | 2013-10-21 | Air valve with alloy arranged on plate conical face in bead-weld mode and nitride layer reserved on alloy layer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310495086.5A CN103498711A (en) | 2013-10-21 | 2013-10-21 | Air valve with alloy arranged on plate conical face in bead-weld mode and nitride layer reserved on alloy layer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103498711A true CN103498711A (en) | 2014-01-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310495086.5A Pending CN103498711A (en) | 2013-10-21 | 2013-10-21 | Air valve with alloy arranged on plate conical face in bead-weld mode and nitride layer reserved on alloy layer |
Country Status (1)
| Country | Link |
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| CN (1) | CN103498711A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106121761A (en) * | 2016-08-15 | 2016-11-16 | 苏州亘富机械科技有限公司 | A kind of valve guide bushing being coated with plasma nitrided layer |
| CN112901305A (en) * | 2019-11-15 | 2021-06-04 | 曼恩能源方案有限公司 | Valve seat ring of gas exchange valve and gas exchange valve |
| CN115013107A (en) * | 2022-06-28 | 2022-09-06 | 湖南天雁机械有限责任公司 | Engine nitriding valve and processing technology thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0424423B2 (en) * | 1985-09-24 | 1992-04-27 | Toyoda Chuo Kenkyusho Kk | |
| JPH07102916A (en) * | 1993-10-07 | 1995-04-18 | Aisan Ind Co Ltd | Engine valve |
| CN1250840A (en) * | 1998-10-08 | 2000-04-19 | 富士乌兹克斯株式会社 | Mushroom like valve member made of aluminium or aluminium alloy, and making method thereof |
| CN101142379A (en) * | 2005-03-18 | 2008-03-12 | 曼柴油机欧洲股份公司 | Gas exchange valve provided with an anti-corrosion layer |
| CN203515709U (en) * | 2013-10-21 | 2014-04-02 | 济南沃德汽车零部件有限公司 | Air valve with surfacing alloy on disc conical surface and nitride layer reserved on alloy layer |
-
2013
- 2013-10-21 CN CN201310495086.5A patent/CN103498711A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0424423B2 (en) * | 1985-09-24 | 1992-04-27 | Toyoda Chuo Kenkyusho Kk | |
| JPH07102916A (en) * | 1993-10-07 | 1995-04-18 | Aisan Ind Co Ltd | Engine valve |
| CN1250840A (en) * | 1998-10-08 | 2000-04-19 | 富士乌兹克斯株式会社 | Mushroom like valve member made of aluminium or aluminium alloy, and making method thereof |
| CN101142379A (en) * | 2005-03-18 | 2008-03-12 | 曼柴油机欧洲股份公司 | Gas exchange valve provided with an anti-corrosion layer |
| CN203515709U (en) * | 2013-10-21 | 2014-04-02 | 济南沃德汽车零部件有限公司 | Air valve with surfacing alloy on disc conical surface and nitride layer reserved on alloy layer |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106121761A (en) * | 2016-08-15 | 2016-11-16 | 苏州亘富机械科技有限公司 | A kind of valve guide bushing being coated with plasma nitrided layer |
| CN112901305A (en) * | 2019-11-15 | 2021-06-04 | 曼恩能源方案有限公司 | Valve seat ring of gas exchange valve and gas exchange valve |
| CN115013107A (en) * | 2022-06-28 | 2022-09-06 | 湖南天雁机械有限责任公司 | Engine nitriding valve and processing technology thereof |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
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Application publication date: 20140108 |