CN1032550C - Niobium casting iron cylinder jacket and piston ring for railway inner combustion locomotive - Google Patents
Niobium casting iron cylinder jacket and piston ring for railway inner combustion locomotive Download PDFInfo
- Publication number
- CN1032550C CN1032550C CN 92106728 CN92106728A CN1032550C CN 1032550 C CN1032550 C CN 1032550C CN 92106728 CN92106728 CN 92106728 CN 92106728 A CN92106728 A CN 92106728A CN 1032550 C CN1032550 C CN 1032550C
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- CN
- China
- Prior art keywords
- piston ring
- niobium
- cast alloy
- alloy iron
- iron
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
- F05C2203/00—Non-metallic inorganic materials
- F05C2203/04—Phosphor
Abstract
The present invention relates to alloy cast iron for manufacturing diesel cylinder sleeves of internal combustion locomotives. The alloy cast iron of the present invention not only contains ferrum, carbon, silicon, sulfur and phosphorus, but also contains manganese, copper and niobium. The alloy cast iron contains the component of the percentage by weight: 2.7 to 3.2% of C, 1.5 to 2.0% of Si, 0.8 to 1.1% of Mn, lower than 0.3% of P, lower than 0.1% of S, 0.35 to 0.5% of Cu, 0.20 to 0.35% of Nb, and Fe and impurity for the rest. The niobium-nickel alloy cast iron has the advantage of high mechanical property, and the matrix contains carbonitrided niobium hard phases distributed in a diffused mode, which have the function of resisting abrasion. The present invention can effectively reduce the production cost of the cylinder sleeve and prolong the service life of the cylinder sleeve.
Description
The invention belongs to a kind of cast alloy iron that beeliner diesel cylinder liner and piston ring are used of making.
At present, the material of beeliner use for diesel engine steam jacket has four kinds of boron cast irons, middle phosphorus alloy cast iron, vanadium-titanium cast iron, chromium molybdenum copper cast alloy iron according to the regulation of the standard TB1429-82 of the Ministry of Railways.Regulation according to the standard TB1429-82 of the Ministry of Railways also has the mechanical property of the foundry goods of this steam jacket to be not less than the cast iron of HT25-47 trade mark performance, and the hardness of its steam jacket body requires to be boron cast iron HB207-285; Middle phosphorus alloy cast iron HB215-285; Vanadium-titanium cast iron HB205-255; Chromium molybdenum copper cast alloy iron HB212-280.Because the hardness ratio of above-mentioned alloy own is lower, the hardness of the sharp phosphorus thing that produces in its cast alloy iron is also not very high, and it is also inhomogeneous to distribute, so, the hardness of its working-surface can not be satisfied with service requirements, therefore, use the steam jacket of above-mentioned cast alloy iron manufacturing to carry out surface treatment: a, phosphatization through following several method; B, electrocontact hardening; C, nitrogenize; D, chromium plating.Because above several surface treatment methods require than higher state of the art, and time-consuming, effort.When carrying out electrocontact hardening as the steam jacket internal surface, hardening depth should be less than 0.2mm, hardness HRC50-60, and the quenching area is the 40-60% of the steam jacket work total area, hardens a little to answer uniform distribution with the interval.Also have only ten thousand kilometers of 20-30 the mean life of carrying out the steam jacket after the surface treatment like this.At present, the piston ring that diesel engine of diesel locomotive is used is according to the regulation of the standard TB1382-82 of the Ministry of Railways, its employed material also is a cast alloy iron, in order to guarantee the wear resisting property of its this piston ring, the hardness of piston ring body should be HRB94-107, simultaneously zinc-plated, chromium plating, sprayed molybdenum alloy or phosphatization surface treatment will be carried out in the surface of piston ring, and be very high to the process of surface treatment level and the surface treatment specification of quality of piston ring, and take a lot of work very much, time-consuming, manufacturing cost is also than higher.Moreover, bigger to the consumption rate of electric power for the steam jacket and the employed cast alloy iron of piston ring of diesel locomotive because fusing point all than higher, need be used electrosmelting, so also caused severe energy waste.
The objective of the invention is in order to overcome above-mentioned deficiency a kind of wear-resistant, the long service life of invention and beeliner steam jacket, the piston ring cast alloy iron that does not need surface treatment to use.
The present invention be achieved in that this diesel locomotive steam jacket and piston ring with cast alloy iron except that containing iron, carbon, silicon, sulphur, phosphorus five big elements, also added manganese metal, copper, niobium simultaneously.Adding manganese metal in this cast alloy iron, mainly is the formation that promotes this alloy Medium pearlite, so the add-on of manganese metal is preferably the 0.8-1.19% of weight alloy in this cast alloy iron.The solubleness of metallic copper in cast iron is 0.35% of cast iron weight, and the copper 0.35% or more that adds cast iron weight can change the velocity of diffusion of carbon atom in the phase transition process of austenite and sharp plate body, impels the formation perlite, and the energy refine pearlite.In the process of cooling of cast iron, particularly during ageing treatment, copper is precipitated out from sosoloid, has strengthened matrix, and can improve pearlitic microhardness significantly.The content of copper preferably is controlled at the 0.35-0.5% of cast alloy iron weight in this cast alloy iron.Metal niobium is a metallic element crucial in this cast alloy iron.Because metal niobium has stronger avidity with nitrogen, carbon in cast iron, after in this cast alloy iron, adding metal niobium, can not only solid solution and strengthen matrix, improve the mechanical property of this cast alloy iron, more mainly be that to separate out granularity in matrix be 2-8 μ m, microhardness HV
1.0＞2000 carbon niobium nitride hard phase, this carbon niobium nitride hard phase disperse is distributed in this cast alloy iron.The carbon niobium nitride hard that disperse is distributed in this cast alloy iron mainly plays the attrition resistant effect of support mutually, and it can improve the wear resisting property of this cast alloy iron widely, thereby can prolong the work-ing life of steam jacket and piston ring effectively.The add-on of metal niobium is preferably the 0.15-0.35% of this cast alloy iron weight.The adding form of metal niobium in this cast alloy iron when being preferably in the melting of this cast alloy iron, joins in the smelting furnace with the form of metal niobium alloy, and in sum, the content of various metal ingredients (weight %) is in this cast alloy iron: C2.7-3.2; Si1.5-2.0; Mn0.8-1.1; S＜0.1; P＜0.3; Cu0.35-0.5; Nb0.15-0.35; All the other are Fe and impurity.
Said impurity is quantity metal or nonmetallic substance seldom in the mentioned component, and wherein metallics comprises rare earth elements such as vanadium, titanium, lanthanum, cerium, rhenium, and from the weight percent of whole alloy, this impurity can be ignored.
The mechanical property of the alloy iron casting of producing according to mentioned component can meet or exceed the performance of HT25-47 trade mark cast iron, its matrix hardness HB210-260.
For further crystal grain thinning and perlite, improve the mechanical property and the toughness of this cast alloy iron, preferably add metallic nickel in this cast alloy iron again, the add-on of its metallic nickel is that the 0.2-0.3% of this cast alloy iron weight is the best.Optimal components of this cast alloy iron and shared separately weight percent are:
C2.7-3.2; Si1.5-2.0; Mn0.8-1.1; S＜0.1; P＜0.3; Cu0.35-0.5; Nb0.2-0.35; Ni0.2-0.3; All the other are Fe and impurity.
The cast alloy iron steam jacket of producing according to mentioned component and the mechanical property of piston ring are as follows:
Tensile strength＞294 N/mm
2Bending strength＞560N/mm
2Amount of deflection＞1.2; Hardness (HB) 210-260.
The metallographic structure of this cast alloy iron steam jacket is: graphite form is the shred shape, and matrix is a sorbite shape perlite, and the ferrite quantity in its matrix is not more than 5%.The granularity of carbon niobium nitride hard phase is 2-8 μ m in this cast alloy iron, is distributed in the matrix with every square millimeter of 100 above disperses.
The hardness of microstructure is in this cast alloy iron:
Carbon niobium nitride: 1500-2500 (HV)
Phosphorus brilliant mixture: 700-1300 (HV)
Owing to outside deironing in this cast alloy iron, carbon, silicon, the phosphorus five big elements, added manganese metal, copper, niobium, nickel simultaneously again.The adding of multiple metallic element in this cast alloy iron, strengthened perlite, the crystal grain that increased dispersity, refinement and stablized compound, the particularly adding of metal niobium, make the carbon niobium nitride hard phase of having separated out high microhardness in the matrix, this carbon niobium nitride hard phase disperse is distributed in the matrix.After manufacturing steam jacket or piston ring with this cast alloy iron, its carbon niobium nitride hard works the attrition resistant effect of supporting as first slipping plane of steam jacket working face or piston ring working face.Because the microhardness of this carbon niobium nitride is HV1500-2500, and the microhardness of the bright layer after the used steam jacket surface treatment of diesel locomotive now is HV1300-1500, the body hardness of piston ring is HRB94-107, therefore be enhanced than the steam jacket of using cast alloy iron production traditionally and the wear resisting property of piston ring with the steam jacket of this cast alloy iron production and the wear resisting property of piston ring, can not use through surface treatment again with not needing after the steam jacket of this cast alloy iron production and the piston ring mechanical workout, thereby can save because the needed expense of surface treatment.Moreover, with the steam jacket of this cast alloy iron production and piston ring is that carbon niobium nitride hard with its working-surface is wear-resisting point of suppon mutually, and their matrix hardness is lower comparatively speaking, what steam jacket and piston ring working face were worn at first is the lower matrix of hardness, after the matrix of its steam jacket and piston ring working face is worn, the part that is worn forms oil storage vessel and can make the working-surface of steam jacket and piston ring form good lubricating oil film, the working face of steam jacket and piston ring not only has good wear-resisting fulcrum like this, and can obtain well lubricated, thereby can prolong work-ing life of steam jacket effectively.The tapping temperature of this cast alloy iron melting is controlled at 1440 ± 20 ℃ in addition.Teeming temperature is not less than 1330 ℃ and gets final product, and this cast alloy iron of therefore making diesel locomotive steam jacket and piston ring carries out melting with cupola furnace and gets final product, and so also can save a large amount of electric power, solves the contradiction of power tense effectively, has also saved the energy simultaneously.Can reach ten thousand kilometers of 60-70 the work-ing life with the steam jacket of this cast alloy iron production after tested.
Claims (2)
1, be used for the cast alloy iron of beeliner steam jacket and piston ring, it is characterized in that, its chemical ingredients (weight %) is: C2.7-3.2; Si1.5-2.0; Mn0.8-1.1; S＜0.1; P＜0.3; Cu0.35-0.5; Nb0.15-0.35; All the other are Fe and impurity.
2, the cast alloy iron that is used for beeliner steam jacket and piston ring according to claim 1 is characterized in that, Nb0.2-0.35 wherein, Ni0.2-0.3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92106728 CN1032550C (en) | 1992-09-29 | 1992-09-29 | Niobium casting iron cylinder jacket and piston ring for railway inner combustion locomotive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92106728 CN1032550C (en) | 1992-09-29 | 1992-09-29 | Niobium casting iron cylinder jacket and piston ring for railway inner combustion locomotive |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1084901A CN1084901A (en) | 1994-04-06 |
| CN1032550C true CN1032550C (en) | 1996-08-14 |
Family
ID=4942370
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92106728 Expired - Fee Related CN1032550C (en) | 1992-09-29 | 1992-09-29 | Niobium casting iron cylinder jacket and piston ring for railway inner combustion locomotive |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1032550C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2270247B1 (en) * | 2008-03-27 | 2014-04-30 | Hitachi Metals, Ltd. | Piston ring material for internal combustion engine |
| CN102676912A (en) * | 2012-05-30 | 2012-09-19 | 河南中原吉凯恩气缸套有限公司 | Low-carbon and low-silicon cylinder sleeve and preparation method thereof |
| CN104131216B (en) * | 2014-07-23 | 2016-08-24 | 中原内配集团股份有限公司 | A kind of phosphorus niobium cast iron cylinder cover and preparation method thereof |
| CN108999714B (en) * | 2018-08-10 | 2021-05-28 | 重庆理工大学 | High-performance cylinder sleeve assembly and manufacturing method thereof |
-
1992
- 1992-09-29 CN CN 92106728 patent/CN1032550C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1084901A (en) | 1994-04-06 |
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