CN103600063A - Powder metallurgy check valve core and manufacturing method thereof - Google Patents
Powder metallurgy check valve core and manufacturing method thereof Download PDFInfo
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- CN103600063A CN103600063A CN201310469327.9A CN201310469327A CN103600063A CN 103600063 A CN103600063 A CN 103600063A CN 201310469327 A CN201310469327 A CN 201310469327A CN 103600063 A CN103600063 A CN 103600063A
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Abstract
The invention discloses a powder metallurgy check valve core. The powder metallurgy check valve core is characterized by being manufactured by, by weight, steel scrap powder 74.5-75.8 parts, manganese powder 3.2-3.4 parts, molybdenum powder 1.5-1.7 parts, chromium powder 9.2-9.5 parts, molybdenum disulfide powder 1.5-1.8 parts, aluminum scrap powder 3.1-3.3 parts, graphite 1.5-1.8 parts, Mg 5.2-5.6 parts, Zn 3.5-3.8 parts, Cr 0.5-0.8 part and assistant 2-3 parts. A manufacturing process has high production continuity, the material utilization rate is high, the powder metallurgy check valve core is suitable for large-scale production, the cost is reduced, and the product performance can meet the normal usage demand. The graphite is added into a raw material, so that the abrasive resistance and the lubricating property of the powder metallurgy check valve core are improved, the manufactured valve core is compact in texture, good in microstructure, few in pore and excellent in structural rigidity, hardness, fatigue resistance performance and tensile strength performance.
Description
Technical field
The present invention relates to field of powder metallurgy, particularly a kind of powder metallurgy non-return valve spool and preparation method thereof.
Background technology
Non-return valve (having another name called check-valves) refers to and relies on medium itself to flow and automatic open and close flap, is used for preventing the valve that medium flows backwards, and claims again non-return valve, check valve, reflux valve and counterbalance valve.Check-valves belongs to a kind of automatic valve, and its Main Function is to prevent that medium from flowing backwards, preventing pump and drive motor reversion, and the releasing of vessel media.Check-valves also can be used for may rising to the accessory system of pressing over system to pressure wherein to be provided on the pipeline of supply.Check-valves mainly can be divided into swing check valve (according to center of gravity rotation) and lift check valve (moving along axis).At present, domestic spherical non-return valve spool all adopts common high-speed steel material, or stainless steel material is by the spherical non-return valve spool of machined.Process velocity is slower, and stock utilization is not high, and powder metallurgical technique is manufactured stop valve, and not only stock utilization is high, and is suitable for producing in enormous quantities.
Powder metallurgy be produce metal dust or with metal dust (or mixture of metal dust and non-metal powder) as raw material, through being shaped and sintering, produce the industrial technology of metal material, composite and all kinds goods.At present, PM technique has been widely used in the fields such as traffic, machinery, electronics, Aero-Space, weapons, biology, new forms of energy, information and nuclear industry, becomes one of branch of tool development vitality in new material science.That PM technique possesses is significantly energy-conservation, economize material, excellent performance, Product Precision is high and the series of advantages such as good stability, is very suitable for producing in enormous quantities.In addition, part material and the also available PM technique manufacture of complex parts that with conventional cast method and machining process, cannot prepare, thereby enjoy the attention of industrial quarters.Powder metallurgy structural part product material composition is not limited by melting, both can add alloying component, can add other structural constituent yet, and adjusts as requested in sizable scope, and then can reach the effect of mating with steel part in mechanical property.
Powder metallurgy mechanization degree is high, can reduce personnel, can raise the efficiency again, so that cost-saving.PM technique can replace traditional manufacturing process, for the vast traditional forms of enterprises cost-saving.
So study the formula of the powder metallurgy of various components of machine, adapt to different needs, have great importance.
Summary of the invention
The object of this invention is to provide a kind of powder metallurgy non-return valve spool and preparation method thereof.
In order to realize object of the present invention, the present invention passes through following scheme implementation:
A powder metallurgy non-return valve spool, is made by the raw material of following weight portion: steel scrap powder 74.5-75.8, manganese powder 3.2-3.4, molybdenum powder 1.5-1.7, chromium powder 9.2-9.5, molybdenum disulphide powder 1.5-1.8, aluminium scrap powder 3.1-3.3, graphite 1.5-1.8, Mg 5.2-5.6, Zn3.5-3.8, Cr 0.5-0.8, auxiliary agent 2-3;
Described auxiliary agent is made by the raw material of following weight portion: iron powder 30-34, aluminium hydroxide 2-3, zinc sulfate 1-2, medical stone 1-2, nano-sized carbon 1-2, jade 2-3, polyisobutene 2-3, aluminate coupling agent DL-411 1-2, carborundum powder 2-3; Preparation method mixes iron powder, aluminium hydroxide, zinc sulfate, medical stone, grind to form 200-300 order powder, then add aluminate coupling agent DL-411 to mix, under 10-15Mpa, be pressed into blank, then, send at 920-950 ℃ and calcine 3-4 hour, cooling after, be ground into 300-400 order powder, mix with other residual components, be heated to 60-70 ℃, under 1200-1500 rev/min, stir 1-2 hour, obtain.
Powder metallurgy non-return valve spool of the present invention, by following concrete steps, made:
(1) steel scrap powder, manganese powder, molybdenum powder, chromium powder, molybdenum disulphide powder, aluminium scrap powder, Mg, Zn, Cr are mixed, add in suitable quantity of water, send into ball milling in ball mill, obtain 250-400 order powder, then, spraying is dry, oven dry, under 8-10Mpa pressure, is pressed into bulk, then under nitrogen protection atmosphere 550-650 ℃ carry out sintering 8-10 hour, will be after the crushing material after sintering cross 200-400 mesh sieve;
(2) other residual components is mixed;
(3) at 55-65 ℃, after mixing and stirring 70-90 minute, pack step (1), (2) material into mould, be pressed into base;
(4) pressed compact is placed in sintering furnace, with 6-8 ℃/min of speed, is warming up to sintering 2-3 hour under 800-850 ℃ of condition; Then with 5-7 ℃/min of speed, be warming up to sintering 2-3 hour under 1050-1150 ℃ of condition; To be cooled to 420-450 ℃ with 8-10 ℃/min of speed again, be incubated after 2-3 hour, in air, slow cooling is to room temperature again.
Manufacturing process of the present invention has higher continuous production, and stock utilization is high, is suitable for producing in enormous quantities, reduces costs, and properties of product can meet the normal needs that use; In raw material of the present invention, increase graphite, increased wearability and the lubricity of product, the spool dense structure of manufacture, microstructure is good, and seldom, the rigidity of structure, hardness, fatigue performance, tensile strength properties are good for hole.
Specific embodiments
Below by instantiation, the present invention is described in detail.
A powder metallurgy non-return valve spool, by following weight portion (kilogram) raw material make: steel scrap powder 74.5, manganese powder 3.2, molybdenum powder 1.5, chromium powder 9.2, molybdenum disulphide powder 1.5, aluminium scrap powder 3.1, graphite 1.5, Mg 5.2, Zn3.5, Cr 0.5, auxiliary agent 2;
Described auxiliary agent by following weight portion (kilogram) raw material make: iron powder 30, aluminium hydroxide 2, zinc sulfate 1, medical stone 1, nano-sized carbon 1, jade 2, polyisobutene 2, aluminate coupling agent DL-411 1, carborundum powder 2; Preparation method mixes iron powder, aluminium hydroxide, zinc sulfate, medical stone, grind to form 200-300 order powder, then add aluminate coupling agent DL-411 to mix, under 10-15Mpa, be pressed into blank, then, send at 920-950 ℃ and calcine 3-4 hour, cooling after, be ground into 300-400 order powder, mix with other residual components, be heated to 60-70 ℃, under 1200-1500 rev/min, stir 1-2 hour, obtain.
Powder metallurgy non-return valve spool of the present invention, by following concrete steps, made:
(1) steel scrap powder, manganese powder, molybdenum powder, chromium powder, molybdenum disulphide powder, aluminium scrap powder, Mg, Zn, Cr are mixed, add in suitable quantity of water, send into ball milling in ball mill, obtain 250-400 order powder, then, spraying is dry, oven dry, under 8-10Mpa pressure, is pressed into bulk, then under nitrogen protection atmosphere 550-650 ℃ carry out sintering 8-10 hour, will be after the crushing material after sintering cross 200-400 mesh sieve;
(2) other residual components is mixed;
(3) at 55-65 ℃, after mixing and stirring 70-90 minute, pack step (1), (2) material into mould, be pressed into base;
(4) pressed compact is placed in sintering furnace, with 6-8 ℃/min of speed, is warming up to sintering 2-3 hour under 800-850 ℃ of condition; Then with 5-7 ℃/min of speed, be warming up to sintering 2-3 hour under 1050-1150 ℃ of condition; To be cooled to 420-450 ℃ with 8-10 ℃/min of speed again, be incubated after 2-3 hour, in air, slow cooling is to room temperature again.
Through detection, hardness of the present invention: HRC54; Tensile strength: 1140MPa.
Claims (2)
1. a powder metallurgy non-return valve spool, it is characterized in that, by the raw material of following weight portion, made: steel scrap powder 74.5-75.8, manganese powder 3.2-3.4, molybdenum powder 1.5-1.7, chromium powder 9.2-9.5, molybdenum disulphide powder 1.5-1.8, aluminium scrap powder 3.1-3.3, graphite 1.5-1.8, Mg 5.2-5.6, Zn3.5-3.8, Cr 0.5-0.8, auxiliary agent 2-3;
Described auxiliary agent is made by the raw material of following weight portion: iron powder 30-34, aluminium hydroxide 2-3, zinc sulfate 1-2, medical stone 1-2, nano-sized carbon 1-2, jade 2-3, polyisobutene 2-3, aluminate coupling agent DL-411 1-2, carborundum powder 2-3; Preparation method mixes iron powder, aluminium hydroxide, zinc sulfate, medical stone, grind to form 200-300 order powder, then add aluminate coupling agent DL-411 to mix, under 10-15Mpa, be pressed into blank, then, send at 920-950 ℃ and calcine 3-4 hour, cooling after, be ground into 300-400 order powder, mix with other residual components, be heated to 60-70 ℃, under 1200-1500 rev/min, stir 1-2 hour, obtain.
2. powder metallurgy non-return valve spool according to claim 1, is characterized in that, by following concrete steps, is made:
(1) steel scrap powder, manganese powder, molybdenum powder, chromium powder, molybdenum disulphide powder, aluminium scrap powder, Mg, Zn, Cr are mixed, add in suitable quantity of water, send into ball milling in ball mill, obtain 250-400 order powder, then, spraying is dry, oven dry, under 8-10Mpa pressure, is pressed into bulk, then under nitrogen protection atmosphere 550-650 ℃ carry out sintering 8-10 hour, will be after the crushing material after sintering cross 200-400 mesh sieve;
(2) other residual components is mixed;
(3) at 55-65 ℃, after mixing and stirring 70-90 minute, pack step (1), (2) material into mould, be pressed into base;
(4) pressed compact is placed in sintering furnace, with 6-8 ℃/min of speed, is warming up to sintering 2-3 hour under 800-850 ℃ of condition; Then with 5-7 ℃/min of speed, be warming up to sintering 2-3 hour under 1050-1150 ℃ of condition; To be cooled to 420-450 ℃ with 8-10 ℃/min of speed again, be incubated after 2-3 hour, in air, slow cooling is to room temperature again.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310469327.9A CN103600063A (en) | 2013-10-10 | 2013-10-10 | Powder metallurgy check valve core and manufacturing method thereof |
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| CN201310469327.9A CN103600063A (en) | 2013-10-10 | 2013-10-10 | Powder metallurgy check valve core and manufacturing method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104550924A (en) * | 2014-12-25 | 2015-04-29 | 铜陵市经纬流体科技有限公司 | Iron-base powder metallurgy material for wearable valve and preparation method thereof |
| CN107904564A (en) * | 2017-11-16 | 2018-04-13 | 金堆城钼业股份有限公司 | A kind of preparation method of molybdenum disulfide sputtering target material |
| CN107916404A (en) * | 2017-11-16 | 2018-04-17 | 金堆城钼业股份有限公司 | A kind of method for preparing molybdenum disulfide target |
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| CN102744400A (en) * | 2012-06-21 | 2012-10-24 | 芜湖禾丰离合器有限公司 | Automobile transmission gear based on copper aluminum steel sintering by powder metallurgy technology and manufacture method of automobile transmission gear |
| CN102773485A (en) * | 2012-06-30 | 2012-11-14 | 安徽省繁昌县皖南阀门铸造有限公司 | Method for manufacturing check valve core by powder metallurgy |
| CN103252494A (en) * | 2013-04-09 | 2013-08-21 | 吴建平 | Powder metallurgy preparation method of compressor valve plate |
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| US4204031A (en) * | 1976-12-06 | 1980-05-20 | Riken Corporation | Iron-base sintered alloy for valve seat and its manufacture |
| US6632263B1 (en) * | 2002-05-01 | 2003-10-14 | Federal - Mogul World Wide, Inc. | Sintered products having good machineability and wear characteristics |
| US20070081914A1 (en) * | 2005-10-12 | 2007-04-12 | Hitachi Powdered Metals Co., Ltd. | Manufacturing method for wear resistant sintered member, sintered valve seat, and manufacturing method therefor |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104550924A (en) * | 2014-12-25 | 2015-04-29 | 铜陵市经纬流体科技有限公司 | Iron-base powder metallurgy material for wearable valve and preparation method thereof |
| CN104550924B (en) * | 2014-12-25 | 2016-09-07 | 铜陵市经纬流体科技有限公司 | A kind of wearable valve iron-base powder metallurgy material and preparation method thereof |
| CN107904564A (en) * | 2017-11-16 | 2018-04-13 | 金堆城钼业股份有限公司 | A kind of preparation method of molybdenum disulfide sputtering target material |
| CN107916404A (en) * | 2017-11-16 | 2018-04-17 | 金堆城钼业股份有限公司 | A kind of method for preparing molybdenum disulfide target |
| CN107904564B (en) * | 2017-11-16 | 2019-07-12 | 金堆城钼业股份有限公司 | A kind of preparation method of molybdenum disulfide sputtering target material |
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Application publication date: 20140226 |