CN1101681A - Sulfur contained high temoperature self lubricating nickel base alloy - Google Patents
Sulfur contained high temoperature self lubricating nickel base alloy Download PDFInfo
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- CN1101681A CN1101681A CN 93119001 CN93119001A CN1101681A CN 1101681 A CN1101681 A CN 1101681A CN 93119001 CN93119001 CN 93119001 CN 93119001 A CN93119001 A CN 93119001A CN 1101681 A CN1101681 A CN 1101681A
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- base alloy
- nickel base
- sulfur contained
- self lubricating
- alloy
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Abstract
The invention discloses a self-lubricating nickel alloy suitable to be used under high ambient temperature, on various heat engines and other sliding and sealing parts of mechanism subject to high heat. It is composed of C, Mo, Cr, Co, Fe, S and Ni, smelt by MF inductance and formed by melt mold. It shows high mechanical strength and thermal resistance, in a range from room temperature to 700 degrees C, and excellent wear resistance and self-lubrication. It is suitable for cylinder lining, valve seat and other sliding and sealing parts.
Description
The present invention has narrated a kind of sulfur contained high temoperature self lubricating Alloy And Preparation Method that can be used for all kinds of heat engines and slip of other high temperature mechanism and sealing element under the atmosphere hot conditions.
High temperature lubricating problem under atmosphere and the particular surroundings is one of emphasis problem of current tribology research.The solution of such problem is to developing high-effect engine of new generation and advanced propulsion system and there is very big practical significance in other high temperature mechanism.Because lubricating oil, lubricating grease and solid lubricant commonly used lost efficacy under the high temperature, make to lubricate and become very difficult, the engineering materials that uses as friction means in all kinds of heat engines and other high temperature mechanism will be worked under rigorous environment and tribology condition, and the generation higher friction, and cause serious wear out failure.
Wear resistance and the relatively poor deficiency that waits of thermotolerance when there is under the lesser temps the too high and comparatively high temps of frictional coefficient in the disclosed high temoperature self lubricating nickel base alloy of CN1034584A, expensive alloy element Nb content is high and make the manufacturing cost height in the most preferred embodiment alloy in addition, thereby has reduced the practicality of this alloy.
The objective of the invention is provides a kind of have high intensity and thermotolerance for the slip and the sealing element of all kinds of heat engines and other high temperature mechanism etc., and in wide temperature range, presenting the sulfur contained high temoperature self lubricating nickelalloy of superior abrasion resistance and self lubricity, another object of the present invention just provides the preparation method of this alloy.
The basic chemical ingredients of sulfur-bearing self-lubricating nickelalloy provided by the invention is: C:0-1.2, Mn:8-20, Cr:0-20, Co:3-15, Fe:5-20, S:2-8, (wt% weight face proportion by subtraction, down with), surplus is NI, this alloy is reached mutually with the carbide hard by the nickel γ phase matrix of the solution strengthening that contains a large amount of alloying elements that sulfide is lubricated to be constituted mutually.
The preparation method of casting sulfur contained high temoperature self lubricating nickel base alloy is as follows:
Alloy adopts the Medium frequency induction melting, the preparation technology that investment cast is shaped, and step is:
1, batching.Select electrolytic nickel, cobalt metal, pure iron, chromium metal for use, electrode graphite carbon metal molybdenum (or molybdenum-iron) is a raw material, and sulphur forms with FeS and adds.Take by weighing raw material in proportion, stand-by.Before the batching raw material crushing is become suitably big or small bulk, and carry out sandblast or milled processed, remove surface corrosion and dirt.
2, reinforced.For reducing the scaling loss of reactive metal element Cr, Mo and elementary sulfur, adopt the batch charging method, promptly add nickel, cobalt, ferrous components earlier, add chromium, molybdenum, carbon component and FeS more successively.
3, melting.Melting is carried out in medium-frequency induction furnace.
(1) nickel, cobalt, the ferrous components that will add earlier is heated to fusing, the chrome molybdenum carbon component added again, and adds high-power with its fusing.Be incubated 1-2 minute.
(2) reduce power and add FeS, controlled temperature makes the abundant alloying of alloy melt 1320-1360 ℃, insulation 5-10 minute.And allow the chemical reaction that generates the sulfide that is of value to antifriction fully carry out.
(3) add the high-power alloy superheat that makes.Add and to account for alloy total amount 0.1-1(wt%) CeO
2Powder, and with high-power agitation molten pool 1-2 minute.The burning that the temperature of alloy melt is controlled at 1380-1520 ℃ is annotated temperature.
4, shell mould preheating.The temperature that the good investment casting shells of processing roasting in advance is preheating to 400-1000 ℃ is stand-by.
5, cast.With temperature is that 1380-1520 ℃ alloy melt pours in the good shell mould of preheating steadily, continuously.
6, broken type takes out foundry goods.After the slow cooling of preheating oven, break shell mould, promptly get the alloy casting blank.
Have above-mentioned chemical ingredients, and some physical mechanical and the friction and wear behavior such as the table 1 of the casting sulfur contained high temoperature self lubricating nickel base alloy that makes through above-mentioned preparation method, shown in 2.
Annotate: frictional coefficient, wear rate are to record on bolt-disc type high-temperature friction testing machine, and mating material is quenching rapid steel (W
18Cr
4V).
Embodiment
Example 1: chemical ingredients is Mo:18, Fe:15, and Co:5, S:4(wt%), surplus is nickel γ phase matrix and the sulfide M oS of the casting sulfur contained high temoperature self lubricating nickel base alloy of Nl by Co, Fe, Mo solution strengthening
2Lubricated formation mutually.Its density is 7.68g/cm
3, hardness is HV 204 * 10
7Pa, thermal expansivity (20-800 ℃) is 15.0 * 10
-6/ ℃, impact value is 0.36 * 10
5J/m
2, ultimate compression strength is 6.58 * 10 for 20 ℃
8Pa, 500 ℃ is 5.83 * 10
8Pa.Frictional coefficient during this alloy room temperature is higher to be reduced to 0.28 when being 0.50,300 ℃, 300-500 ℃ of frictional coefficient low and stable (0.28-0.20), and wearing and tearing, little (wear rate is 2.8-8.7 * 10
-14m
3/ Nm), can be used for working temperature is 300-500 ℃ the heat engine and the slip and the sealing element of other high temperature mechanism.
Example 2: chemical ingredients is C:0.4, Mo:15, and Fe:10, Cr:10, Co:5, S:5(wt%) surplus is that the casting sulfur contained high temoperature self lubricating nickel base alloy of Nl is by the nickel γ of Fe, Co, Cr, Mo solution strengthening baseization (M mutually
0.9Cr
0.1)
2The C hard is mutually with Cr
3S
4It is the main lubricated formation mutually of sulfide.Its density is 7.83g/cm
3Hardness is HV 231 * 10
7Pa, linear expansivity (20-800 ℃) is: 14.3 * 10
-8/ ℃, impact value is 0.34 * 10
5J/m
2, ultimate compression strength is 7.07 * 10 for 20 ℃
8Pa, 500 ℃ is 4.36 * 10
8Pa, this alloy be at 150-500 ℃ of temperature range coefficient of interal friction low and stable (0.26-0.20), and wearing and tearing, little (wear rate is 1.8-6.2 * 10
-14m
3/ Nm), be applicable to the heat engine that the impact load of 150-500 ℃ of work is lower and the slip and the sealing element of other high temperature mechanism.
Example 3: chemical ingredients is C:0.6-0.7, Mo:15, and Cr:10, Co:10, Fe:10, S:5, surplus is the matrix (M of the casting sulfur contained high temoperature self lubricating nickel base alloy of Nl by solution strengthening such as Fe, Co, Cr, Mo
0.9Cr
0.1)
2C hard phase and Cr
3S
4Lubricated formation mutually.Its matrix interalloy element total content reaches more than 34%.Occur in this alloy volume percent surpass 40% close the eutectic structure that particle constitutes by matrix, carbide particle and sulfuration, increased the intensity and the wear resistance of alloy on largely.This alloy density is 7.83g/cm
3, hardness is 284 * 10
7Pa, linear expansivity (20-800 ℃) is: 14.1 * 10
-6/ ℃, impact value is 0.42-0.60 * 10
5J/m
2, (this alloy impact value through vacuum induction melting, the preparation of vacuum fusible pattern casting technique can reach 1.50 * 10
5J/m
2More than), ultimate compression strength is 7.46 * 10 for 20 ℃
8Pa, 600 ℃ is 5.23 * 10
8Pa.
This alloy is at 20-700 ℃ of frictional coefficient low and stable (0.28-0.16), and it is little to wear and tear, and (wear rate is 1.5-20 * 10
-14m
3/ Nm).
It is the heat engine of room temperature to 700 ℃ scope and the slip and the sealing element of other high temperature mechanism that this alloy is suitable for working temperature.
Claims (2)
1, a kind of can be under the atmosphere hot conditions, be used for that all kinds of heat engines and other high temperature mechanism slide and the basic chemical ingredients of the sulfur contained high temoperature self lubricating nickel base alloy of sealing element is 0-1.2, Mo:8-25, Cr:0-20, Co:3-15, Fe:5-20, S:2-8 (wt%), surplus is NI.
2, casting sulfur contained high temoperature self lubricating nickel base alloy as claimed in claim 1 adopts the processing method preparation of Medium frequency induction melting, investment cast moulding, and operation steps comprises:
Batching, reinforced, melting, shell mould preheating, cast, broken type go out foundry goods, it is characterized in that smelting temperature is 1320-1360 ℃, are incubated 10 minutes, teeming temperature 1380-1500 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93119001 CN1051337C (en) | 1993-10-11 | 1993-10-11 | Sulfur contained high temoperature self lubricating nickel base alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93119001 CN1051337C (en) | 1993-10-11 | 1993-10-11 | Sulfur contained high temoperature self lubricating nickel base alloy |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1101681A true CN1101681A (en) | 1995-04-19 |
| CN1051337C CN1051337C (en) | 2000-04-12 |
Family
ID=4992740
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93119001 Expired - Fee Related CN1051337C (en) | 1993-10-11 | 1993-10-11 | Sulfur contained high temoperature self lubricating nickel base alloy |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1051337C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108913974A (en) * | 2018-06-20 | 2018-11-30 | 中国科学院兰州化学物理研究所 | A kind of sulfur-bearing self-lubricating high-entropy alloy and preparation method thereof |
-
1993
- 1993-10-11 CN CN 93119001 patent/CN1051337C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108913974A (en) * | 2018-06-20 | 2018-11-30 | 中国科学院兰州化学物理研究所 | A kind of sulfur-bearing self-lubricating high-entropy alloy and preparation method thereof |
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| Publication number | Publication date |
|---|---|
| CN1051337C (en) | 2000-04-12 |
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Owner name: GANSU HAILIN ZHONGKE TECHNOLOGY CO.LTD. Free format text: FORMER OWNER: LANZHOU INST. OF CHEMICAL PHYSICS, CHINESE ACADEMY OF SCIENCES Effective date: 20030328 |
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Effective date of registration: 20030328 Address after: 741018 Gansu province Tianshui Qincheng District Minshan Road No. 55 Patentee after: GANSU HAILIN ZHONGKE SCIENCE AND TECHNOLOGY CO., LTD. Address before: 730000 No. 236, Tian Shui Road, Chengguan District, Gansu, Lanzhou Patentee before: Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences |
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