CN1051337C - 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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- CN1051337C CN1051337C CN 93119001 CN93119001A CN1051337C CN 1051337 C CN1051337 C CN 1051337C CN 93119001 CN93119001 CN 93119001 CN 93119001 A CN93119001 A CN 93119001A CN 1051337 C CN1051337 C CN 1051337C
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- alloy
- temperature
- sulfur contained
- self lubricating
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Abstract
The present invention discloses a sulfur contained high-temperature self lubricating nickel-based alloy and a preparation method. The sulfur contained high-temperature self lubricating nickel-based alloy is used for various hot engines and sliding and sealing elements of other hot temperature mechanisms. The alloy is composed of C, Mo, Cr, Co, Fe, S and Ni, and is prepared by a medium frequency induction melting technology and an investment casting forming technology. The alloy has high mechanical strength and heat resistance, has excellent abrasion resistance and self lubricity at the temperature from the room temperature to 700 DEG C, and is used for cylinder sleeves of internal combustion engines, and valve seat matched sliding and sealing elements of other high temperature mechanisms.
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 heat 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, and Mo:3-20, Cr:0-20, Co:3-15, Fe:5-20, S:2-8 (weight percent, down together), surplus is Ni, this alloy is by containing a large amount of alloying elements.The nickel γ phase matrix and the carbide hard of solution strengthening reaches the lubricated formation mutually of sulfide 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 is incubated 5-10 minute at 1320-1360 ℃, makes the abundant alloying of alloy melt.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 the CeO that accounts for alloy total amount 0.1-1 (weight %)
2Powder, and tremble molten bath 1-2 minute with high-power stirring.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.
The physical and mechanical properties of table 1 sulfur contained high temoperature self lubricating nickel base alloy
The frictional coefficient of table 2 sulfur contained high temoperature self lubricating nickel base alloy, wear rate and ultimate compression strength
| Density (g/cm 3) | Hardness (HV, * 10 7Pa) | Linear expansivity (* 10 -6/℃) (20-800℃) | Impact value (* 10 5J/m 2) |
| 7.66-8.23 | 160-340 | 14.0-15.4 | 0.20-1.20 |
| Temperature (℃) | Frictional coefficient | Wear rate (* 10 -14m 3/N·m) | Ultimate compression strength (* 10 8Pa) |
| 20 | 0.28-0.53 | 1.0-4.0 | 6.40-10.8 |
| 150 | 0.26-0.36 | 1.0-4.0 | 6.40-10.8 |
| 300 | 0.20-0.25 | 1.2-5.0 | 5.90-10.4 |
| 450 | 0.19-0.22 | 1.7-7.2 | 5.60-10.0 |
| 600 | 0.14-0.20 | 2.6-20.0 | 4.20-8.5 |
| 700 | 0.14-0.16 | 20-70 | 3.10-7.4 |
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
16Cr
4V).
Embodiment
Example 1: chemical ingredients is Mo:18, Fe:15, and Co:5, S:4 (weight %), surplus is nickel γ phase matrix and the sulfide M oS of the casting sulfur contained high temoperature self lubricating nickel base alloy of Ni 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), 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 (weight %) surplus is the nickel γ phase matrix (M of the casting sulfur contained high temoperature self lubricating alloy of Ni by Fe, Co, Cr, Mo solution strengthening
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 (weight %) surplus is the matrix of the casting sulfur contained high temoperature self lubricating nickel base alloy of Ni by solution strengthening such as Fe, Co, Cr, Mo, (M
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% by the matrix phase, the eutectic structure that particle constitutes is closed in carbide particle and sulfuration, has 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 sulfur contained high temoperature self lubricating nickel base alloy is characterized in that its basic chemical ingredients is Mo:5-20, Cr:0-20, and Co:3-15, Fe:5-20, S:2-8 (weight percentage), surplus is Ni.
2. sulfur contained high temoperature self lubricating nickel base alloy as claimed in claim 1 is characterized in that alloy contains C:0-1.2, Cr:0-20 (weight percentage).
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 CN1101681A (en) | 1995-04-19 |
| CN1051337C true CN1051337C (en) | 2000-04-12 |
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ID=4992740
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| 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 |
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| Country | Link |
|---|---|
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Families Citing this family (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
Also Published As
| Publication number | Publication date |
|---|---|
| CN1101681A (en) | 1995-04-19 |
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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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