CN104550929A - Iron-nitrogen powder metallurgy valve and preparation method thereof - Google Patents
Iron-nitrogen powder metallurgy valve and preparation method thereof Download PDFInfo
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- CN104550929A CN104550929A CN201410819154.3A CN201410819154A CN104550929A CN 104550929 A CN104550929 A CN 104550929A CN 201410819154 A CN201410819154 A CN 201410819154A CN 104550929 A CN104550929 A CN 104550929A
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Abstract
The invention discloses an iron-nitrogen powder metallurgy valve. The iron-nitrogen powder metallurgy valve is prepared from the following raw materials in parts by weight: 3-5 parts of water-atomized copper powder, 3-5 parts of carbonyl nickel powder, 18-21 parts of Fe3N powder, 0.4-0.6 part of graphite powder, 0.5-0.8 part of K2O, 0.2-0.3 part of optically pure carbon powder, 2-3 parts of chromium powder, 4.1-4.8 parts of nickel powder, 0.03-0.05 part of phosphorus powder, 2-3 parts of manganese oxide, 0.5-0.7 part of silane coupling agent kh-550, a proper amount of 1 percent sodium carbonate solution, a proper amount of water, 4.5-5.5 parts of sodium hypophosphite, 0.4-0.6 part of polyethylene glycol, 50-65 parts of 2 Mol/L copper sulfate solution, 2-3 parts of wetting aid and 70-75 parts of iron powder. The carbonyl nickel powder and iron nitride are added into a valve material, and are well combined with a substrate interface and distributed uniformly, so that the mechanical property of the material is enhanced, the wear resistance of the material is improved, and the hardness can be up to 74-82HRB.
Description
Technical field
The present invention relates to powder metallurgical technology, particularly relate to a kind of iron and nitrogen powder metallurgy valve and preparation method thereof.
Background technology
Valve is in fluid system, is used for controlling the device of the direction of fluid, pressure, flow, is the medium in pipe arrangement and equipment (liquid, gas, powder) is flowed or stops and controlling the device of its flow.
Valve material therefor is a lot, and wherein mmaterial manufacture craft is simple, makes precision high, saved cost, but powder metallurgy exists a lot of problem.Such as common iron-base powder metallurgy material is heat-resisting, erosion resistance is poor, and bearing is poor, and the mechanical properties such as intensity, hardness, shock-resistance are not high enough.
Metal has heat-shock resistance, the feature of good toughness, but metal is easily oxidized, and hot strength is not high.Stupalith has high rigidity, good heat resistance, the feature such as corrosion-resistant.By metal and Ceramic bond, can obtain that hardness is large, hot strength is high, high temperature creep is good, the material of good thermal shock, many excellent properties such as anti-oxidant, corrosion-resistant, wear-resistant, make valve be more suitable for the change of environment, longer service life.But due to nonmetallic phase and metallographic phase poor compatibility, easily make composition occur segregation, homogeneity of structure is poor, intensity is uneven, occur piebald, running-in ability is poor, wears no resistance, larger pressure can not be born, heat declines seriously, and cracking resistance can be poor, and thermal fatigue resistance can be poor, reduce use properties, shorten work-ing life.
The performance of iron-base powder metallurgy material can be improved by feed change, the performance of material can also be improved by the consistency improving nonmetallic phase and metallographic phase.
Summary of the invention
The object of the present invention is to provide a kind of iron and nitrogen powder metallurgy valve and preparation method thereof, this valve material mechanical property is good, wear resisting property is good, hardness can reach 74-82HRB.
Technical scheme of the present invention is as follows:
A kind of iron and nitrogen powder metallurgy valve, is characterized in that being made up of the raw material of following weight part: water atomization copper powder 3-5, carbonyl nickel powder 3-5, Fe3N powder 18-21, Graphite Powder 99 0.4-0.6, K2O 0.5-0.8, optical purity carbon dust 0.2-0.3, chromium powder 2-3, nickel powder 4.1-4.8, phosphorus powder 0.03-0.05, manganese oxide 2-3, silane coupling agent kh-550 0.5-0.7,1% sodium carbonate solution is appropriate, water appropriate, inferior sodium phosphate 4.5-5.5, polyoxyethylene glycol 0.4-0.6,2Mol/L copper-bath 50-65, wetting aid 2-3, iron powder 70-75;
Described wetting aid is made up of the raw material of following weight part: SrCl 0.1-0.2, P2O5 0.2-0.4, sodium stannate 0.4-0.6, K
2zrF
62.3-2.8, Mo1.3-1.6, nanometer LA2O3 0.6-0.9, ceria nanopowder 0.3-0.5, nano-sized carbon 0.2-0.4, aluminium powder 0.6-0.9, NaF0.1-0.2, acetone 8-10, poly(oxyethylene glycol) 400 0.1-0.2; Preparation method is: poly(oxyethylene glycol) 400 added in acetone, stir, add nanometer LA2O3, ceria nanopowder again, under 8000-10000 rev/min, stir 10-15 minute, ultrasonic disperse 4-5 minute, then add other remaining components stirring 10-15 minute, ultrasonic disperse 4-5 minute, spraying dry, sends in vacuum high temperature furnace, be evacuated to≤10
-2pa, then pass into argon gas, be heated to 1300-1400 DEG C, insulation 20-30 minute, cooling, pulverizes, to obtain final product.
The preparation method of described iron and nitrogen powder metallurgy valve, is characterized in that comprising the following steps:
(1) by Fe3N powder, manganese oxide mixing, add in 1% sodium carbonate solution of 3-4 times of weight part, be heated to 40-50 DEG C, stir 10-15 minute, filter, add the water washing of 3-4 times of weight part, repeated washing 2-3 time, filter, obtain filter cake;
(2) mixed with wetting aid by filter cake, grinding 30-40 minute, adds the water of 4-5 times of weight part, add silane coupling agent kh-550, stir 10-15 minute, be heated to 60-70 DEG C, then add the iron powder of carbonyl nickel powder, nickel powder, 2.1-2.3 weight part, stir 30-40 minute, filter, spraying dry under an atmosphere of hydrogen, pulverize, cross 130 mesh sieves, obtain powder;
(3) powder that (2) step obtains is added in 2Mol/L copper-bath, add polyoxyethylene glycol, inferior sodium phosphate, be heated to 60-70 DEG C, stirring reaction 1-2 hour, filter, be washed with water to neutrality, pass into hot hydrogen and dry, pulverize, obtain powder;
(4) powder that (3) step obtains is mixed with other remaining components, ball milling, shaping, sintering, finished machined, to obtain final product.
Beneficial effect of the present invention
Valve material of the present invention with the addition of carbonyl nickel powder, nitrided iron, be combined with basal body interface well, be evenly distributed, the mechanical property that improve material, the wear resisting property improving material, hardness can reach 74-82HRB, present invention process makes metallographic phase and nonmetallic phase mutually intert, combine closely, add wettability and the cohesiveness of nonmetallic phase and metallographic phase, can component segregation be prevented, make material structure even, add intensity and toughness; The wetting aid of the application of the invention, can increase the wettability of metal pair nonmetallic phase, increases fatigue strength and the toughness of valve.
Embodiment
A kind of iron and nitrogen powder metallurgy valve, is made up of the raw material of following weight part (kilogram): water atomization copper powder 4, carbonyl nickel powder 4, Fe3N powder 19, Graphite Powder 99 0.5, K2O 0.6, optical purity carbon dust 0.2, chromium powder 2.5, nickel powder 4.5, phosphorus powder 0.04, manganese oxide 2.5, silane coupling agent kh-550 0.6,1% sodium carbonate solution are appropriate, water appropriate, inferior sodium phosphate 5, polyoxyethylene glycol 0.5,2Mol/L copper-bath 58, wetting aid 2.5, iron powder 73;
Described wetting aid is made up of the raw material of following weight part (kilogram): SrCl 0.1, P2O5 0.3, sodium stannate 0.5, K
2zrF
62.5, Mo1.5, nanometer LA2O3 0.7, ceria nanopowder 0.4, nano-sized carbon 0.3, aluminium powder 0.7, NaF0.1, acetone 9, poly(oxyethylene glycol) 400 0.1; Preparation method is: poly(oxyethylene glycol) 400 added in acetone, stir, add nanometer LA2O3, ceria nanopowder again, stir 13 minutes under 9000 revs/min, ultrasonic disperse 4 minutes, then add other remaining components and stir 14 minutes, ultrasonic disperse 5 minutes, spraying dry, sends in vacuum high temperature furnace, be evacuated to≤10
-2pa, then pass into argon gas, be heated to 1350 DEG C, be incubated 25 minutes, cooling, pulverize, to obtain final product.
The preparation method of described iron and nitrogen powder metallurgy valve, comprises the following steps:
(1) by Fe3N powder, manganese oxide mixing, add in 1% sodium carbonate solution of 3.5 times of weight parts, be heated to 45 DEG C, stir 13 minutes, filter, add the water washing of 3.5 times of weight parts, repeated washing 2.5 times, filter, obtain filter cake;
(2) filter cake is mixed with wetting aid, grind 35 minutes, add the water of 4.5 times of weight parts, add silane coupling agent kh-550, stir 13 minutes, be heated to 66 DEG C, then add the iron powder of carbonyl nickel powder, nickel powder, 2.2 weight parts, stir 35 minutes, filter, spraying dry under an atmosphere of hydrogen, pulverize, cross 130 mesh sieves, obtain powder;
(3) powder that (2) step obtains is added in 2Mol/L copper-bath, add polyoxyethylene glycol, inferior sodium phosphate, be heated to 65 DEG C, stirring reaction 1.5 hours, filter, be washed with water to neutrality, pass into hot hydrogen and dry, pulverize, obtain powder;
(4) powder that (3) step obtains is mixed with other remaining components, ball milling, shaping, sintering, finished machined, to obtain final product.
Experimental data:
The hardness HRB of this embodiment valve material is 76 after tested, and density is 95.89%, voidage 9.43%, and fracture toughness property is 15.4MPam
1/2, ultimate compression strength is 161MPa, and bending strength is 513MPa.
Claims (2)
1. an iron and nitrogen powder metallurgy valve, is characterized in that being made up of the raw material of following weight part: water atomization copper powder 3-5, carbonyl nickel powder 3-5, Fe3N powder 18-21, Graphite Powder 99 0.4-0.6, K2O 0.5-0.8, optical purity carbon dust 0.2-0.3, chromium powder 2-3, nickel powder 4.1-4.8, phosphorus powder 0.03-0.05, manganese oxide 2-3, silane coupling agent kh-550 0.5-0.7,1% sodium carbonate solution are appropriate, water appropriate, inferior sodium phosphate 4.5-5.5, polyoxyethylene glycol 0.4-0.6,2Mol/L copper-bath 50-65, wetting aid 2-3, iron powder 70-75;
Described wetting aid is made up of the raw material of following weight part: SrCl 0.1-0.2, P2O5 0.2-0.4, sodium stannate 0.4-0.6, K
2zrF
62.3-2.8, Mo1.3-1.6, nanometer LA2O3 0.6-0.9, ceria nanopowder 0.3-0.5, nano-sized carbon 0.2-0.4, aluminium powder 0.6-0.9, NaF0.1-0.2, acetone 8-10, poly(oxyethylene glycol) 400 0.1-0.2; Preparation method is: poly(oxyethylene glycol) 400 added in acetone, stir, add nanometer LA2O3, ceria nanopowder again, under 8000-10000 rev/min, stir 10-15 minute, ultrasonic disperse 4-5 minute, then add other remaining components stirring 10-15 minute, ultrasonic disperse 4-5 minute, spraying dry, sends in vacuum high temperature furnace, be evacuated to≤10
-2pa, then pass into argon gas, be heated to 1300-1400 DEG C, insulation 20-30 minute, cooling, pulverizes, to obtain final product.
2. the preparation method of iron and nitrogen powder metallurgy valve according to claim 1, is characterized in that comprising the following steps:
(1) by Fe3N powder, manganese oxide mixing, add in 1% sodium carbonate solution of 3-4 times of weight part, be heated to 40-50 DEG C, stir 10-15 minute, filter, add the water washing of 3-4 times of weight part, repeated washing 2-3 time, filter, obtain filter cake;
(2) mixed with wetting aid by filter cake, grinding 30-40 minute, adds the water of 4-5 times of weight part, add silane coupling agent kh-550, stir 10-15 minute, be heated to 60-70 DEG C, then add the iron powder of carbonyl nickel powder, nickel powder, 2.1-2.3 weight part, stir 30-40 minute, filter, spraying dry under an atmosphere of hydrogen, pulverize, cross 130 mesh sieves, obtain powder;
(3) powder that (2) step obtains is added in 2Mol/L copper-bath, add polyoxyethylene glycol, inferior sodium phosphate, be heated to 60-70 DEG C, stirring reaction 1-2 hour, filter, be washed with water to neutrality, pass into hot hydrogen and dry, pulverize, obtain powder;
(4) powder that (3) step obtains is mixed with other remaining components, ball milling, shaping, sintering, finished machined, to obtain final product.
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| CN201410819154.3A CN104550929A (en) | 2014-12-25 | 2014-12-25 | Iron-nitrogen powder metallurgy valve and preparation method thereof |
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| CN201410819154.3A CN104550929A (en) | 2014-12-25 | 2014-12-25 | Iron-nitrogen powder metallurgy valve and preparation method thereof |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001021345A1 (en) * | 1999-09-23 | 2001-03-29 | Kemet Electronics Corporation | Binder systems for powder metallurgy compacts |
| CN103182502A (en) * | 2011-12-27 | 2013-07-03 | 北京有色金属研究总院 | High-performance iron-based part pre-alloyed powder used for valve seat and preparation method thereof |
| CN103252492A (en) * | 2013-04-09 | 2013-08-21 | 吴建平 | Preparation method for powder metallurgy for automotive brake valve block |
| CN103406536A (en) * | 2013-07-03 | 2013-11-27 | 安徽方兴实业有限公司 | Powder metallurgy valve rod and manufacturing method thereof |
| CN103567433A (en) * | 2013-10-10 | 2014-02-12 | 铜陵国方水暖科技有限责任公司 | Powder metallurgy valve seat and preparation method thereof |
| CN103602922A (en) * | 2013-10-10 | 2014-02-26 | 铜陵新创流体科技有限公司 | Powder metallurgy ferrous alloy and preparation method thereof |
-
2014
- 2014-12-25 CN CN201410819154.3A patent/CN104550929A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001021345A1 (en) * | 1999-09-23 | 2001-03-29 | Kemet Electronics Corporation | Binder systems for powder metallurgy compacts |
| CN103182502A (en) * | 2011-12-27 | 2013-07-03 | 北京有色金属研究总院 | High-performance iron-based part pre-alloyed powder used for valve seat and preparation method thereof |
| CN103252492A (en) * | 2013-04-09 | 2013-08-21 | 吴建平 | Preparation method for powder metallurgy for automotive brake valve block |
| CN103406536A (en) * | 2013-07-03 | 2013-11-27 | 安徽方兴实业有限公司 | Powder metallurgy valve rod and manufacturing method thereof |
| CN103567433A (en) * | 2013-10-10 | 2014-02-12 | 铜陵国方水暖科技有限责任公司 | Powder metallurgy valve seat and preparation method thereof |
| CN103602922A (en) * | 2013-10-10 | 2014-02-26 | 铜陵新创流体科技有限公司 | Powder metallurgy ferrous alloy and preparation method thereof |
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Application publication date: 20150429 |
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