CN1441079A - Ionic nitridizing treatment technology for piston ring of alloy cast iron - Google Patents
Ionic nitridizing treatment technology for piston ring of alloy cast iron Download PDFInfo
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- CN1441079A CN1441079A CN 03112878 CN03112878A CN1441079A CN 1441079 A CN1441079 A CN 1441079A CN 03112878 CN03112878 CN 03112878 CN 03112878 A CN03112878 A CN 03112878A CN 1441079 A CN1441079 A CN 1441079A
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- piston ring
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- iron
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- alloy iron
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- Pistons, Piston Rings, And Cylinders (AREA)
- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
Abstract
The present invention relates to ionic nitridizing treatment technology for piston ring of alloy cast iron. The piston ring of alloy cast iron set inside the ionic nitridizing furnace is first into bombarded for 1-2 hr at high voltage of 600-1000 V and high vacuum of 10-50 Pa to activate the surface; and then surface nitridizing treated for 8-16 hr at 460-520 deg.c with introduced gases in the flow rate of 0.01-0.15 L/min and comtaining N2, H2, O2, etc. The surface of the piston ring after the ionic nitridizing treatment has one 0.01-0.03 mm thick discontinuous high-hardness layer with graphite inclusion of hardness HV0.1 800-1000, and one 0.08-0.1 mm thick diffused layer below the high-hardness layer. The piston ring after the ionic nitridizing treatment has good initial breaking-in performance, low friction coefficient, high wear resistance and good adaptability, and is especially suitable for use in modern diesel engine.
Description
Technical field
What the present invention relates to is that a kind of surface hardness is HV
0.1The degree of depth that discontinuous, centre more than 800 is being mingled with graphite is the 0.01-0.02mm rigidity layer, and total depth of penetration reaches the above cast alloy iron piston ring ion Plasma Nitriding Treatment technology of 0.1mm.
Background technology
The internal-combustion engine piston ring nitriding treatment adopts gas nitriding (tufftride) or salt-bath nitriding at present, and is based on the nitriding treatment on the Martensite Stainless Steel.The objective of the invention is with the cast alloy iron is matrix, carries out nitriding treatment with the mode of ion nitriding, makes the surface have high, discontinuous centre and is being mingled with the surface hardness layer of graphite and certain depth of penetration.
Summary of the invention
The objective of the invention is with the cast alloy iron is matrix, carries out nitriding treatment with the mode of ion nitriding, makes the surface have high, discontinuous centre and is being mingled with the surface hardness layer of graphite and certain depth of penetration.Technical solution of the present invention: cast alloy iron piston ring ion Plasma Nitriding Treatment technology be the cast alloy iron piston ring in ion nitriding furnace earlier through too high voltages 600-1000V, high vacuum 10-50Pa ion bombardment 1-2 hour, carry out surface active: feeding flow then is the gas that 0.01-0.15L/min contains atmosphere such as N, H, O, in ion nitriding furnace, maintain under 460-520 ℃ the temperature, be incubated 8-16 hour, nitriding treatment is carried out on the piston ring surface.
The piston ring basic material cast alloy iron of this ion Plasma Nitriding Treatment, it comprises low-alloy cast iron, interalloy cast iron, high alloy iron,
Its chemical ingredients is:
Low-alloy cast iron (%): carbon: 3.5～3.9 silicon: 2.4～3.1 manganese: 0.5～0.9
Phosphorus: 0.3～0.6 sulphur :≤0.15 chromium :≤0.4 bronze medal :≤0.5 other element can be used as impurity to be kept;
The chemical ingredients of interalloy cast iron (%): carbon: 3.1～3.7 silicon: 2.3～3.1 manganese: 0.5～0.8 phosphorus: 40.4 sulphur :≤0.1 chromium: 0.3～0.7 vanadium :≤0.3 molybdenum: 0.7～1.2 nickel: 0.4～0.9 bronze medal :≤0.5 other element can be used as impurity to be kept;
The chemical ingredients of high alloy iron (%) carbon: 2.5～3.3 silicon: 3.6～4.6 manganese: 0.8～1.2 phosphorus :≤0.35 sulphur: 40.15 chromium: 0.2～0.6 vanadium: 0.3～0.7 molybdenum: 0.5～1.0 nickel: 0.5～1.0 bronze medal: 0.5～1.0 titanium: 0.1～0.3 tungsten: 0.8～1.2 niobium: 0.1～0.4 other element can be used as impurity to be kept.
There is the high rigidity layer that one deck 0.01mm-0.03mm is discontinuous, the centre is mingled with graphite on cast alloy iron piston ring surface through ion Plasma Nitriding Treatment, and this rigidity layer hardness is HV
0.1800-1000 is that the degree of depth is the uneven diffusion layer of 0.08mm-0.1mm below rigidity layer.
Advantage of the present invention: have through the cast alloy iron piston ring of ion Plasma Nitriding Treatment that initial fitting property is good, coefficient of friction is low,, be specially adapted to modernized diesel motor than high-wearing feature and good adaptability.
Embodiment
Embodiment 1
Low-alloy cast iron 600V, 100Pa air pressure add and carry out ion bombardment, 1 hour time; Feed NH
3, CO
2Gas, 460 ℃ are incubated 16 hours.Through the cast alloy iron piston ring surface of ion Plasma Nitriding Treatment the high rigidity layer that one deck 0.01mm is discontinuous, sandwich is mixed graphite is arranged, this rigidity layer hardness is HV
0.1800, be that the degree of depth is the uneven diffusion layer of 0.08mm below rigidity layer.
Embodiment 2
High alloy iron 750V, 50Pa air pressure add and carry out ion bombardment, 1.5 hours time; Feed N
2, H
2, CO
2Gas, 490 ℃ are incubated 12 hours.Through the cast alloy iron piston ring surface of ion Plasma Nitriding Treatment the high rigidity layer that one deck 0.02mm is discontinuous, sandwich is mixed graphite is arranged, this rigidity layer hardness is HV
0.1900, be that the degree of depth is the uneven diffusion layer of 0.09mm below rigidity layer.
Embodiment 3
Interalloy cast iron 900,10Pa air pressure add and carry out ion bombardment, 2 hours time; Feed N
2, H
2, CO
2Gas, 520 ℃ are incubated 8 hours.Through the cast alloy iron piston ring surface of ion Plasma Nitriding Treatment the high rigidity layer that one deck 0.03mm is discontinuous, sandwich is mixed graphite is arranged, this rigidity layer hardness is HV
0.11000, be that the degree of depth is the uneven diffusion layer of 0.1mm below rigidity layer.
Claims (3)
1, cast alloy iron piston ring ion Plasma Nitriding Treatment technology, it is characterized in that the cast alloy iron piston ring in ion nitriding furnace earlier through too high voltages 600-1000V, high vacuum 10-50Pa ion bombardment 1-2 hour, carry out surface active: feeding flow then is the gas that 0.01-0.15L/min contains atmosphere such as N, H, O, in ion nitriding furnace, maintain under 460-520 ℃ the temperature, be incubated 8-16 hour, nitriding treatment is carried out on the piston ring surface.
2, cast alloy iron piston ring ion Plasma Nitriding Treatment technology according to claim 1 is characterized in that the piston ring basic material cast alloy iron of this ion Plasma Nitriding Treatment, and it comprises low-alloy cast iron, interalloy cast iron, high alloy iron,
Its chemical ingredients is:
Low-alloy cast iron (%): carbon: 3.5～3.9 silicon: 2.4～3.1 manganese: 0.5～0.9
Phosphorus: 0.3～0.6 sulphur :≤0.15 chromium :≤0.4 bronze medal :≤0.5 other element can be used as impurity to be kept;
The chemical ingredients of interalloy cast iron (%): carbon: 3.1～3.7 silicon: 2.3～3.1 manganese: 0.5～0.8 phosphorus: 40.4 sulphur: 40.1 chromium: 0.3～0.7 vanadium: 40.3 molybdenums: 0.7～1.2 nickel: 0.4～0.9 bronze medal :≤0.5 other element can be used as impurity to be kept;
The chemical ingredients of high alloy iron (%) carbon: 2.5～3.3 silicon: 3.6～4.6 manganese: 0.8～1.2 phosphorus :≤0.35 sulphur: 40.15 chromium: 0.2～0.6 vanadium: 0.3～0.7 molybdenum: 0.5～1.0 nickel: 0.5～1.0 bronze medal: 0.5～1.0 titanium: 0.1～0.3 tungsten: 0.8～1.2 niobium: 0.1～0.4 other element can be used as impurity to be kept.
3, cast alloy iron piston ring is characterized in that through the cast alloy iron piston ring surface of ion Plasma Nitriding Treatment the high rigidity layer that one deck 0.01mm-0.03mm is discontinuous, the centre is mingled with graphite being arranged, and this rigidity layer hardness is HV
0.1800-1000 is that the degree of depth is the uneven diffusion layer of 0.08mm-0.1mm below rigidity layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03112878 CN1441079A (en) | 2003-02-25 | 2003-02-25 | Ionic nitridizing treatment technology for piston ring of alloy cast iron |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03112878 CN1441079A (en) | 2003-02-25 | 2003-02-25 | Ionic nitridizing treatment technology for piston ring of alloy cast iron |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1441079A true CN1441079A (en) | 2003-09-10 |
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ID=27770354
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03112878 Pending CN1441079A (en) | 2003-02-25 | 2003-02-25 | Ionic nitridizing treatment technology for piston ring of alloy cast iron |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103757564A (en) * | 2013-12-25 | 2014-04-30 | 浙江台州金陶机械制造有限公司 | Cast alloy iron bainite piston ring and production technology thereof |
| CN105603357A (en) * | 2015-12-31 | 2016-05-25 | 浙江舟山博斯特船舶设计研究院有限公司 | Ionic nitriding process for marine crankshafts |
-
2003
- 2003-02-25 CN CN 03112878 patent/CN1441079A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103757564A (en) * | 2013-12-25 | 2014-04-30 | 浙江台州金陶机械制造有限公司 | Cast alloy iron bainite piston ring and production technology thereof |
| CN103757564B (en) * | 2013-12-25 | 2016-06-15 | 浙江台州金陶机械制造有限公司 | Cast alloy iron bainite piston ring and production technology thereof |
| CN105603357A (en) * | 2015-12-31 | 2016-05-25 | 浙江舟山博斯特船舶设计研究院有限公司 | Ionic nitriding process for marine crankshafts |
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