CN104550909A - Ferrum-based powder metallurgy material for valve core of cut-off valve and preparation method of ferrum-based powder metallurgy material - Google Patents
Ferrum-based powder metallurgy material for valve core of cut-off valve and preparation method of ferrum-based powder metallurgy material Download PDFInfo
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- CN104550909A CN104550909A CN201410818906.4A CN201410818906A CN104550909A CN 104550909 A CN104550909 A CN 104550909A CN 201410818906 A CN201410818906 A CN 201410818906A CN 104550909 A CN104550909 A CN 104550909A
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Abstract
The invention relates to a ferrum-based powder metallurgy material for a valve core of a cut-off valve. The ferrum-based powder metallurgy material is prepared from the following raw materials in parts by weight: 7-8 parts of photovoltaic silicon cutting solid waste powder, 0.4-0.6 part of poly Schiff-base, 5-7 parts of nano tungsten trioxide, 1-1.5 part of Pd, 2-3 parts of V, 2-3 parts of VC, 12-16 parts of MoC, 6-7 parts of tungsten carbide, 0.5-0.8 part of barium carbonate, 16-18 parts of carbon steel powder, 0.3-0.4 part of silane coupling agent kh-550, an appropriate amount of 1% sodium carbonate solution, an appropriate amount of water, 5-6 parts of sodium hypophosphite, 0.4-0.6 part of polyethylene glycol, 60-65 parts of 2Mol/L copper sulphate solution, 2-3 parts of wetting aid and 50-55 parts of iron powder. According to the ferrum-based powder metallurgy material for the valve core of the cut-off valve, the wettability and the caking property of a nonmetal phase and a metal phase are increased, the composition segregation can be prevented, the tissue uniformity of the material are ensured, and the strength and the tenacity are improved; by the addition of the photovoltaic silicon cutting solid waste powder, the nano tungsten trioxide and the MoC, the heat resistance and the corrosion resistance of the valve core are improved, and waste recycling is realized.
Description
Technical field
The present invention relates to powder metallurgical technology, particularly relate to iron-base powder metallurgy material of a kind of reverse checkvalve spool 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 iron-base powder metallurgy material of a kind of reverse checkvalve spool and preparation method thereof, this valve material thermotolerance and good corrosion resistance, and achieve refuse reclamation.
Technical scheme of the present invention is as follows:
An iron-base powder metallurgy material for reverse checkvalve spool, is characterized in that being made up of the raw material of following weight part: photovoltaic silicon cutting solid waste powder 7-8, polyShiff base 0.4-0.6, nano tungsten trioxide 5-7, Pd1-1.5, V2-3, VC2-3, MoC12-16, wolfram varbide 6-7, barium carbonate 0.5-0.8, carbon element comminuted steel shot 16-18, silane coupling agent kh-550 0.3-0.4,1% sodium carbonate solution is appropriate, water appropriate, inferior sodium phosphate 5-6, polyoxyethylene glycol 0.4-0.6,2Mol/L copper-bath 60-65, wetting aid 2-3, iron powder 50-55;
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 the iron-base powder metallurgy material of described reverse checkvalve spool, is characterized in that comprising the following steps:
(1) photovoltaic silicon is cut solid waste powder, nano tungsten trioxide, MoC, wolfram varbide, barium carbonate, VC 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 4-5 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
The manufacture craft of valve core material of the present invention makes metallographic phase and nonmetallic phase mutually intert, and combines closely, and adds wettability and the cohesiveness of nonmetallic phase and metallographic phase, can prevent component segregation, makes material structure even, adds intensity and toughness; By adding photovoltaic silicon cutting solid waste powder, nano tungsten trioxide, MoC, adding thermotolerance and the erosion resistance of spool, and achieving refuse reclamation; 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 spool.
Embodiment
An iron-base powder metallurgy material for reverse checkvalve spool, is made up of the raw material of following weight part (kilogram): photovoltaic silicon cuts solid waste powder 7.6, polyShiff base 0.5, nano tungsten trioxide 6, Pd1.3, V2.5, VC2.5, MoC14, wolfram varbide 6.5, barium carbonate 0.6, carbon element comminuted steel shot 17, silane coupling agent kh-550 0.3,1% sodium carbonate solution is appropriate, water appropriate, inferior sodium phosphate 5.5, polyoxyethylene glycol 0.5,2Mol/L copper-bath 65, wetting aid 2.5, iron powder 53;
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 the iron-base powder metallurgy material of described reverse checkvalve spool, comprises the following steps:
(1) photovoltaic silicon is cut solid waste powder, nano tungsten trioxide, MoC, wolfram varbide, barium carbonate, VC 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 3 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 65 DEG C, then add the iron powder of 4.5 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 HB of this embodiment valve material is 60 after tested, and density is 96.84%, voidage 9.21%, and fracture toughness property is 16.1MPam
1/2, ultimate compression strength is 160MPa, and bending strength is 512MPa.
Claims (2)
1. an iron-base powder metallurgy material for reverse checkvalve spool, is characterized in that being made up of the raw material of following weight part: photovoltaic silicon cutting solid waste powder 7-8, polyShiff base 0.4-0.6, nano tungsten trioxide 5-7, Pd1-1.5, V2-3, VC2-3, MoC12-16, wolfram varbide 6-7, barium carbonate 0.5-0.8, carbon element comminuted steel shot 16-18, silane coupling agent kh-550 0.3-0.4,1% sodium carbonate solution is appropriate, water appropriate, inferior sodium phosphate 5-6, polyoxyethylene glycol 0.4-0.6,2Mol/L copper-bath 60-65, wetting aid 2-3, iron powder 50-55;
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 the iron-base powder metallurgy material of reverse checkvalve spool according to claim 1, is characterized in that comprising the following steps:
(1) photovoltaic silicon is cut solid waste powder, nano tungsten trioxide, MoC, wolfram varbide, barium carbonate, VC 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 4-5 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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| CN201410818906.4A CN104550909A (en) | 2014-12-25 | 2014-12-25 | Ferrum-based powder metallurgy material for valve core of cut-off valve and preparation method of ferrum-based powder metallurgy material |
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| CN201410818906.4A CN104550909A (en) | 2014-12-25 | 2014-12-25 | Ferrum-based powder metallurgy material for valve core of cut-off valve and preparation method of ferrum-based powder metallurgy material |
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| CN104550909A true CN104550909A (en) | 2015-04-29 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105170985A (en) * | 2015-09-01 | 2015-12-23 | 韩功篑 | Powder metallurgy cam and preparation method thereof |
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| US20050132842A1 (en) * | 2003-11-21 | 2005-06-23 | Hitachi Powdered Metals Co., Ltd. | Alloy powder for forming hard phase and ferriferous mixed powder using the same, and manufacturing method for wear resistant sintered alloy and wear resistant sintered alloy |
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Application publication date: 20150429 |