CN102996804A - Brittle-rupture-resistant silicon carbide friction pair for mechanical seal and manufacturing method thereof - Google Patents
Brittle-rupture-resistant silicon carbide friction pair for mechanical seal and manufacturing method thereof Download PDFInfo
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- CN102996804A CN102996804A CN201210524990XA CN201210524990A CN102996804A CN 102996804 A CN102996804 A CN 102996804A CN 201210524990X A CN201210524990X A CN 201210524990XA CN 201210524990 A CN201210524990 A CN 201210524990A CN 102996804 A CN102996804 A CN 102996804A
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- silicon carbide
- friction pair
- mechanical seal
- manufacturing
- brittle
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Abstract
The invention relates to a brittle-rupture-resistant silicon carbide friction pair for mechanical seal and a manufacturing method of the brittle-rupture-resistant silicon carbide friction pair. The friction pair for the mechanical seal is manufactured from a ferronickel alloy, silicon carbide powder with the particles size less than or equal to 1 mu m and a proper additive by adopting a hot-pressed sintering method. The manufacturing process comprises the following steps of: filling metals, the silicon carbide powder and the additive into a graphite mold, wherein the silicon carbide powder and the additive are mixed according to a specified proportion, and pressurizing and manufacturing in a hot-pressing furnace at the temperature of 2000 to 2100 DEG C for 30-50Mpa. The material manufactured by the method can be used for a corrosion-resistant friction pair for mechanical seal.
Description
Technical field
The present invention relates to a kind of mechanical seal silicon carbide friction pair and manufacture method thereof of anti-embrittlement.Particularly, adopt this material of described method manufacturing to can be used for corrosion resistant mechanical sealing friction pairs.
Background technique
The hardness of silicon carbide is near diamond and have outstanding wear resistance.Silicon carbide is one of most widely used material in mechanical seal, silicon carbide is except at high temperature dissolving highly basic and strong oxidizing gas, in the caustic alkali that concentration sulfuric acid and boiling point approach entirely, also can stably use, particularly in very large temperature range, keep corrosion resistance and wear resistance.But the friction pair made from carbofrax material but has a fatal weakness, and that is that mechanical strength is very low with regard to it, and is very fragile, very easily embrittlement and cracked under inhomogeneous pressurized condition.The MANUFACTURER of a lot of mechanical seals has identical personal cognition with the user, that is: the mechanical sealing friction pairs of carbofrax material manufacturing is in the transportation transport process, very easily in cargo handling process, be subjected to external force to cause crackle, embrittlement or cracked, cause into waste product and can not use; Also have MANUFACTURER or user to install in the mechanical seal process also and can cause the cracked waste product that forms owing to undue force a little at assembling goods, cause thus waste and the leeway of finished product.Always very headache to this in the industry, and more effectively solution is not proposed so far.
The present invention proposes a kind of mechanical seal silicon carbide friction pair and manufacture method thereof of anti-embrittlement.The mechanical seal of described anti-embrittlement with the silicon carbide friction pair by adopting hot pressing sintering method to make by iron-nickel alloy, granularity≤carborundum powder of 1 μ m and suitable additive.The linear expansion coeffcient of described iron-nickel alloy is: 0.5 * 10
-6, than regulation and the rotating ring of standard-required and the linear expansion coeffcient 4.5 * 10 of stationary ring
-6Much lower, satisfy usage requirement fully.Its manufacturing process is that carborundum powder that iron-nickel alloy metal ring or tinsel, in accordance with regulations ratio are mixed and additive are packed in the black lead mould, and (30-50Mpa) make in pressurization in 2000-2100 ℃ hot pressing furnace.Adopt this material of described method manufacturing to can be used for corrosion resistant mechanical sealing friction pairs.
The mechanical seal silicon carbide friction pair made from described method, all advantages and the performance that have not only kept the silicon carbide friction pair material, what is more important, owing in manufacture process, ring-type or sheet or strip iron-nickel alloy are placed the central position of carborundum powder, effectively strengthen the mechanical strength of silicon carbide friction pair, fundamentally solved friction pair that carbofrax material in the past makes very easily embrittlement and cracked problem.
Summary of the invention
The present invention for achieving the above object, be achieved through the following technical solutions: a kind of mechanical seal of anti-embrittlement silicon carbide friction pair and manufacture method thereof is characterized in that: the mechanical seal of described anti-embrittlement adopts hot pressing sintering method to make with the silicon carbide friction pair by iron-nickel alloy, granularity≤carborundum powder of 1 μ m and suitable additive.Its manufacturing process is that carborundum powder that iron-nickel alloy metal ring or tinsel, in accordance with regulations ratio are mixed and additive are packed in the black lead mould, and (30-50Mpa) make in pressurization in 2000-2100 ℃ hot pressing furnace.
This shows, in technique scheme of the present invention, in manufacture process, ring-type or sheet or strip iron-nickel alloy placed the granularity that the central position of carborundum powder, the ratio in accordance with regulations mix≤carborundum powder of 1 μ m and suitable additive, the employing hot pressing sintering method is made, effectively strengthen the mechanical strength of silicon carbide friction pair, fundamentally solved friction pair that carbofrax material in the past makes very easily embrittlement and cracked problem.
Description of drawings
Aspect above-mentioned and/or that add of the present invention and advantage are from obviously and easily understanding becoming embodiment's the description below in conjunction with accompanying drawing, and accompanying drawing is the schematic representation that the silicon carbide friction pair is used in the mechanical seal of the anti-embrittlement of one embodiment of the present of invention.Among the figure: 1 in the accompanying drawing: the silicon carbide powder that ratio in accordance with regulations mixes and additive; In the accompanying drawing 2: ring-type or sheet or strip iron-nickel alloy.
Embodiment
The below describes embodiments of the invention in detail, and described embodiment's example is shown in the drawings.Be exemplary below by the embodiment who is described with reference to the drawings, only be used for explaining the present invention, and can not be interpreted as limitation of the present invention.In the present invention, a kind of mechanical seal of anti-embrittlement silicon carbide friction pair and manufacture method thereof.The mechanical seal of described anti-embrittlement is comprised of silicon carbide powder and the additive that ring-type or sheet or strip iron-nickel alloy, in accordance with regulations ratio mix with the silicon carbide friction pair, that is: the silicon carbide powder and the additive (1 in the accompanying drawing) that mix of ring-type or sheet or strip iron-nickel alloy (2 in the accompanying drawing), ratio in accordance with regulations.
Embodiment one: manufacturing external diameter 80mm, internal diameter 30mm, thickness are the technological process that silicon carbide friction pair rotating ring is used in the mechanical seal of the anti-embrittlement of 10 mm.Adopt first the machine cut processing mode side of producing ring-type iron-nickel alloy ring, its Dimensions is: external diameter 60mm, internal diameter 50mm, thickness are 5 mm, and is for subsequent use; It is an amount of to get additive silicon carbide powder an amount of, that get granularity≤1 μ m, and both are mixed be placed on black lead mould, simultaneously, square ring-type iron-nickel alloy ring for subsequent use is also placed the silicon carbide powder that mixes, at this moment, in operation, must note the iron-nickel alloy ring is placed the silicon carbide powder central position that mixes; Then, 2000---and pressurization in 2100 ℃ the hot pressing furnace (30---50Mpa) make.Further Shape correction processing after taking out; Normal temperature leaves standstill after 8 hours and carries out grinding to finished product again.
The above is preferred embodiment of the present invention only, is not that the present invention is done any pro forma restriction.The those of ordinary skill of all industry, but all shown in the by specification accompanying drawing and the above, implement swimmingly the present invention.But all those skilled in the art are not breaking away from the technical solution of the present invention scope, and a little change of making when utilizing the disclosed above technology contents, the equivalent variations of modifying and developing are equivalent embodiment of the present invention; Simultaneously, the change of any equivalent variations that all foundations essence technology of the present invention is done above embodiment, modify with differentiation etc., all still belong to the scope of technological scheme of the present invention.
Claims (2)
1. the mechanical seal of an anti-embrittlement is characterized in that with silicon carbide friction pair and manufacture method thereof: the mechanical seal of described anti-embrittlement with the silicon carbide friction pair by being made by iron-nickel alloy, granularity≤carborundum powder of 1 μ m and suitable additive employing hot pressing sintering method.
2. the metal in the silicon carbide according to claim 1 is the extremely low iron-nickel alloy of expansion coefficient.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210524990XA CN102996804A (en) | 2012-12-07 | 2012-12-07 | Brittle-rupture-resistant silicon carbide friction pair for mechanical seal and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210524990XA CN102996804A (en) | 2012-12-07 | 2012-12-07 | Brittle-rupture-resistant silicon carbide friction pair for mechanical seal and manufacturing method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102996804A true CN102996804A (en) | 2013-03-27 |
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|---|---|---|---|
| CN201210524990XA Pending CN102996804A (en) | 2012-12-07 | 2012-12-07 | Brittle-rupture-resistant silicon carbide friction pair for mechanical seal and manufacturing method thereof |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5647505A (en) * | 1979-09-22 | 1981-04-30 | Nippon Tungsten Co Ltd | Mechanical sieal ring and preparation thereof |
| FR2556070A1 (en) * | 1983-12-01 | 1985-06-07 | Ceraver | Method for manufacturing a mechanical sealing gasket for a rotary machine |
| US5540451A (en) * | 1993-11-02 | 1996-07-30 | Tokyo Electric Power Services Co., Ltd. | Composite sealing material |
| CN1667303A (en) * | 2004-03-08 | 2005-09-14 | 东台市华阳玻纤有限责任公司 | Carbon fiber filling sealed and woven base material and its manufacturing method |
| CN102022544A (en) * | 2011-01-06 | 2011-04-20 | 武汉理工大学 | Mechanical seal friction pair material and preparation method thereof |
-
2012
- 2012-12-07 CN CN201210524990XA patent/CN102996804A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5647505A (en) * | 1979-09-22 | 1981-04-30 | Nippon Tungsten Co Ltd | Mechanical sieal ring and preparation thereof |
| FR2556070A1 (en) * | 1983-12-01 | 1985-06-07 | Ceraver | Method for manufacturing a mechanical sealing gasket for a rotary machine |
| US5540451A (en) * | 1993-11-02 | 1996-07-30 | Tokyo Electric Power Services Co., Ltd. | Composite sealing material |
| CN1667303A (en) * | 2004-03-08 | 2005-09-14 | 东台市华阳玻纤有限责任公司 | Carbon fiber filling sealed and woven base material and its manufacturing method |
| CN102022544A (en) * | 2011-01-06 | 2011-04-20 | 武汉理工大学 | Mechanical seal friction pair material and preparation method thereof |
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Application publication date: 20130327 |