CN1017066B - Self-lubricating metallic pottery and ceramic and process for making same - Google Patents
Self-lubricating metallic pottery and ceramic and process for making sameInfo
- Publication number
- CN1017066B CN1017066B CN 89106018 CN89106018A CN1017066B CN 1017066 B CN1017066 B CN 1017066B CN 89106018 CN89106018 CN 89106018 CN 89106018 A CN89106018 A CN 89106018A CN 1017066 B CN1017066 B CN 1017066B
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- CN
- China
- Prior art keywords
- self
- ceramic
- lubricating
- temperature
- lubricating metal
- Prior art date
- 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.)
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Abstract
The present invention relates to self-lubricating ceramic metal which is used under high-temperature atmospheric conditions. The material takes tungsten carbide and nickel as matrixes, and is also composed of lead oxide and silicon dioxide. Friction coefficients, wear rates and compressive strength are respectively 0.12 to 0.29, <0.98-2.22> * 10 +<-8>mm+ to 3 N. mm and <4.58-5.59>* 10 +8Pa at the temperature from 500 DEG C to 700 DEG C. The present invention is molded by a medium frequency induction furnace with a high-temperature hot-pressing method, and has long service life.
Description
The invention relates to the self-lubricating material that under high temperature atmosphere, uses, belong to the tungsten carbide-nickel based ceramic metal.
Along with the continuous development of science and technology, industrial technology, more and more many high-temperature self-lubrication problems have appearred, and especially require lubricant having good lubricating property, abrasion resistance properties and mechanical property more than 500 ℃.Self-lubricating problem in the hot environment is that many branchs of industry are long-standing, as the mould in the metal fever processing, the roll pins having in the hot rolling system, the mechanical slide valve of thermonuclear power, and the slide unit in the atomic energy technology etc.Under this environment, if use present widely used solid lubricant such as molybdenumdisulphide, graphite etc., because the on the low side or oxidation of heat decomposition temperature makes its antifriction, wear resisting property variation so that lost efficacy.Therefore, development is used under high temperature atmosphere, and the material with good mechanical properties, self-lubricating property and abrasion resistance properties is the problem that people study.
The kalabukbova S.V. of the Soviet Union is with Al
2O
3, MoS
2Be added in the ceramic compound with LiF etc., thereby made intensity and tribological property material [SU950702(1980,12,11)] preferably, its prescription (weight percent) is: TiC 30～32%, Ni 43～45%, MoC 8～9%, Al
2O
313～18%, MoS
20.5～1.5%, LiF 0.5～1.5%, it can be used as the upholder of high-speed cutting instrument; Test shows, with Al
2O
3, MoS
2Be added to the flexural strength that can make material in the compound with LiF and improve 25～29%, reduce frictional coefficient and make wear rate reduce more than 5%.A kind of friction reducing abrasion resistant material [Koshelev Yu.I.SU975683(1981 that russian patent is announced, 5,18], it mainly consists of (weight percent): SiC 24～53%, C 15～35%, Si0.5～3.8%, Ni 8.2～60.5%, this material can be used for support and plain thrust bearing, the mechanical seal etc. on the impeller pump.
The object of the present invention is to provide a kind of self-lubricating metal-ceramic, this self-lubricating metal-ceramic uses under high temperature atmosphere, has low friction, wear-resistant and favorable mechanical performance.
The present invention is achieved in that and selects the matrix of tungsten carbide-nickel as self-lubricating material for use, adds an amount of plumbous oxide again, also can add a spot of silicon-dioxide.The weight percentage scope of self-lubricating metal-ceramic each component is: WC 45～60%, Ni 30～40%, PbO 5～25%, SiO
20～2.5%.The preferential each component content of selecting (weight percent) is: WC 51～57%, Ni 34～38%, PbO 5～15%, SiO
20～1.5%.It is the matrix of self-lubricating metal-ceramic that the present invention selects WC-Ni for use, relies on the WC-Ni matrix to guarantee that material at high temperature has favorable mechanical performance and abrasion resistance properties; An amount of plumbous oxide has played self-lubricating function in the high temperature friction process; For the volatilization of inhibited oxidation lead under hot conditions, can add a spot of silicon-dioxide.
On technology, the present invention adopts the method moulding of medium-frequency induction furnace heat, mold pressing, and the density of the self-lubricating metal-ceramic that makes is greater than 95% of reason degree density.Concrete preparation process of the present invention is such, with WC, Ni, PbO and SiO
2After mixing by a certain percentage, powder packs in the graphite jig, put into the medium-frequency induction furnace sintering, medium-frequency induction furnace is rapidly heated (rising to sintering temperature by room temperature in ten minutes) and pressurizes to material gradually in temperature-rise period, when temperature rises to 1250～1350 ℃, heat-insulation pressure keeping 1～10 minute, resulting pressure is 4.0～9.0WPa, makes it below pressurize to 700 ℃ of lowering the temperature naturally then, cools to the room temperature discharging again with the furnace.
WC of the present invention, Ni, PbO, SiO
2Can select corresponding metal, nonmetal powder for use, WC, Ni, SiO
2Powder is selected technical pure for use, and PbO selects the chemical pure powder for use, and granularity is 200～500 orders.
Main performance index and technical indicator by above-mentioned prescription and the prepared self-lubricating metal-ceramic of preparation technology are listed in table 1.
The performance of table 1, self-lubricating metal-ceramic and technical indicator
Temperature (℃) frictional coefficient wear rate (mm
3/ Nmm) ultimate compression strength (Pa)
Room temperature 0.32～0.35 (13.23～15.42) * 10
-8(6.48-7.41) * 10
8
100 0.42～0.45 （13.55～14.77）×10
-8
200 0.28～0.35 （1.41～1.99）×10
-8（5.54-5.78）×10
8
300 0.25～0.35 （0.65～1.20）×10
-8
400 0.25～0.30 （1.01～1.50）×10
-8（5.62-5.75）×10
8
500 0.22～0.29 （0.98～1.34）×10
-8（5.07-5.59）×10
8
600 0.14～0.18 （1.20～1.67）×10
-8（4.76-5.49）×10
8
700 0.12～0.14 （1.43～2.22）×10
-8（4.58-5.35）×10
8
By table 1 as seen, self-lubricating metal-ceramic is under room temperature～700 ℃, and its ultimate compression strength changes little, is (4.58～7.41) * 10
8Pa; Along with the rising frictional coefficient of temperature diminishes, under 500～700 ℃, frictional coefficient is 0.12～0.29; Self-lubricating metal-ceramic is (0.98～2.22) * 10 at 500～700 ℃ of following wear rates
-8Mm
3/ Nmm.Obviously, self-lubricating metal-ceramic of the present invention suits to use in 500～700 ℃ of scopes especially.This material hardness at room temperature is HRA 70～85, and shock strength is greater than 14kgcm/cm
2
Self-lubricating metal-ceramic can be widely used on 500～700 ℃ of slide units, sealing element under the high temperature etc. and the lubricated relevant parts.It is easy that the present invention has preparation technology, and cost is low, the advantage of long service life.
The embodiment of the invention is listed in table 2.
Table 2, self-lubricating metal-ceramic specific embodiment
The self-lubricating metal-ceramic each component is formed (weight percentage) %
Embodiment WC Ni PbO SiO
1 57 38 5 0
2 54 36 10 0
3 51 34 15 0
4 48 32 20 0
5 45 30 25 0
6 54 36 9.1 0.9
7 51 34 13.7 1.3
8 48 32 18.2 1.8
9 57 38 4.5 0.5
Claims (3)
1, a kind of self-lubricating metal-ceramic that can use under high temperature atmosphere is characterized in that the weight percentage of self-lubricating metal-ceramic each component is: WC45-60%, Ni30-40%, PbO5-25%, SiO
20-2.5%.
2, self-lubricating metal-ceramic as claimed in claim 1 is characterized in that the weight percentage scope of best component is: WC51-57%, Ni34-38%, Pb05-15%, SiO
20-1.5%.
3, the manufacture method of self-lubricating metal-ceramic according to claim 1 is characterized in that material is rapidly heated and pressurizes in intermediate frequency furnace in graphite jig, when temperature rose to 1250-1350 ℃, heat-insulation pressure keeping 1-10 minute, resulting pressure was 4.0-9.0MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89106018 CN1017066B (en) | 1989-11-09 | 1989-11-09 | Self-lubricating metallic pottery and ceramic and process for making same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89106018 CN1017066B (en) | 1989-11-09 | 1989-11-09 | Self-lubricating metallic pottery and ceramic and process for making same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1051592A CN1051592A (en) | 1991-05-22 |
| CN1017066B true CN1017066B (en) | 1992-06-17 |
Family
ID=4856588
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 89106018 Expired CN1017066B (en) | 1989-11-09 | 1989-11-09 | Self-lubricating metallic pottery and ceramic and process for making same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1017066B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1036796C (en) * | 1992-07-17 | 1997-12-24 | 中国科学院兰州化学物理研究所 | High-temp self-lubricating metal-ceramic material |
| CN105821275A (en) * | 2015-01-04 | 2016-08-03 | 山东科技大学 | Induction heating synthetic method of tungsten carbide alloy block |
| CN106399789A (en) * | 2016-08-31 | 2017-02-15 | 贵州德江韫韬科技有限责任公司 | Insecticidal lamp alloy material |
-
1989
- 1989-11-09 CN CN 89106018 patent/CN1017066B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CN1051592A (en) | 1991-05-22 |
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