CN104550915A - High-ductility iron-base powder metallurgy material used for valve and preparation method of high-ductility iron-base powder metallurgy material - Google Patents
High-ductility iron-base powder metallurgy material used for valve and preparation method of high-ductility iron-base powder metallurgy material Download PDFInfo
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- CN104550915A CN104550915A CN201410818957.7A CN201410818957A CN104550915A CN 104550915 A CN104550915 A CN 104550915A CN 201410818957 A CN201410818957 A CN 201410818957A CN 104550915 A CN104550915 A CN 104550915A
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Abstract
The invention discloses a high-ductility iron-base powder metallurgy material used for a valve, which is prepared from the following raw materials in parts by weight: 20-25 parts of atomized iron powder, 7-9 parts of Al2O3, 5-6 parts of carbonyl iron powder, 1.2-1.6 parts of copper power, 3-5 parts of molybdenum powder, 1-2 parts of rare earth ferrosilicon, 1-2 parts of iron silicon aluminium powder, 3-4 parts of iron-base nanocrystalline alloy powder, 0.4-0.7 part of nanocrystalline ferroboron refiner, 0.6-0.8 part of silane coupling agent kh-550, a proper quantity of 1% sodium carbonate solution, a proper quantity of water, 2.5-3.5 parts of sodium hypophosphite, 0.4-0.6 part of polyethylene glycol, 30-35 parts of 2mMol/L copper sulphate solution, 2-3 parts of wetting accessory ingredient and 50-54 parts of iron powder. The rare earth ferrosilicon and the nanocrystalline ferroboron refiner are added into the valve material to improve the toughness, the impact resistance, the corrosion resistance, the abrasion resistance and the oxidation resistance of the valve material.
Description
Technical field
The present invention relates to powder metallurgical technology, particularly relate to a kind of valve high tenacity iron-base powder metallurgy material 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 powdered metallurgical material 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, corrosion resistance is poor, and bearing is poor, and the mechanical properties such as intensity, hardness, resistance to impact are not high enough.
Metal has thermal shock resistance, the feature of good toughness, but metal is easily oxidized, and elevated temperature strength is not high.Ceramic material has high rigidity, good heat resistance, the feature such as corrosion-resistant.By metal and Ceramic bond, can obtain that hardness is large, elevated temperature 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 Metal Phase poor compatibility, easily make composition occur segregation, structural homogenity 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 serviceability, shorten service 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 compatibility improving nonmetallic phase and Metal Phase.
Summary of the invention
The object of the present invention is to provide a kind of valve high tenacity iron-base powder metallurgy material and preparation method thereof, this valve material has the feature of toughness, resistance to impact, corrosion resistance, wearability, good in oxidation resistance.
Technical scheme of the present invention is as follows:
A kind of valve high tenacity iron-base powder metallurgy material, is characterized in that being made up of the raw material of following weight portion: atomized iron powder 20-25, Al2O3 7-9, carbonyl iron dust 5-6, copper powder 1.2-1.6, molybdenum powder 3-5, rare earth ferrosilicon 1-2, iron aluminum silicon powder 1-2, iron-base nanometer crystal alloy powder 3-4, nanocrystalline ferro-boron fining agent 0.4-0.7, silane coupler kh-550 0.6-0.8,1% sodium carbonate liquor is appropriate, water appropriate, inferior sodium phosphate 2.5-3.5, polyethylene glycol 0.4-0.6,2Mol/L copper-bath 30-35, wetting aid 2-3, iron powder 50-54;
Described wetting aid is made up of the raw material of following weight portion: Ga1-2, P1-1.3, boron oxide 0.8-1.4, titanium 1.4-1.6, Mn 1.3-1.6, vanadium oxide 0.6-0.9, SnO0.3-0.5, Bi2O3 0.2-0.4, magnesium powder 0.6-0.9, NaF0.1-0.2, water 8-10, polyethylene glycol 0.1-0.2; Preparation method is: be added to the water by polyethylene glycol, add magnesium powder after stirring, be heated to 70-80 DEG C, stir 20-30 minute, ultrasonic disperse 3-4 minute, add P, vanadium oxide, boron oxide, titanium, SnO, Bi2O3, Mn again, under 7000-8000 rev/min, stir 10-15 minute, ultrasonic disperse 4-5 minute, spraying dry, mix with other residual components, be ground to granularity and be less than 5 μm, to obtain final product.
The preparation method of described valve high tenacity iron-base powder metallurgy material, is characterized in that comprising the following steps:
(1) by carbonyl iron dust, Al2O3 mixing, add in 1% sodium carbonate liquor of 3-4 times of weight portion, be heated to 40-50 DEG C, stir 10-15 minute, filter, add the water washing of 3-4 times of weight portion, 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 portion, add silane coupler kh-550, stir 10-15 minute, be heated to 60-70 DEG C, then add the iron powder of iron aluminum silicon powder, iron-base nanometer crystal alloy powder, 0.6-0.8 weight portion, 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 polyethylene 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 residual 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 rare earth ferrosilicon, nanocrystalline ferro-boron fining agent, can improve the toughness of valve material, resistance to impact, corrosion resistance, wearability, non-oxidizability.Manufacture craft of the present invention makes Metal Phase and nonmetallic phase mutually intert, and combines closely, and adds wetability and the caking property of nonmetallic phase and Metal Phase, can prevent component segregation, makes material structure even, adds 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.
Detailed description of the invention
A kind of valve high tenacity iron-base powder metallurgy material, is made up of the raw material of following weight portion (kilogram): atomized iron powder 23, Al2O38, carbonyl iron dust 5.5, copper powder 1.4, molybdenum powder 4, rare earth ferrosilicon 1.5, iron aluminum silicon powder 1.5, iron-base nanometer crystal alloy powder 3.5, nanocrystalline ferro-boron fining agent 0.5, silane coupler kh-550 0.7,1% sodium carbonate liquor is appropriate, water appropriate, inferior sodium phosphate 35, polyethylene glycol 0.5,2Mol/L copper-bath 33, wetting aid 2.5, iron powder 52;
Described wetting aid is made up of the raw material of following weight portion (kilogram): Ga1.5, P1.2, boron oxide 1, titanium 1.5, Mn 1.5, vanadium oxide 0.7, SnO0.4, Bi2O3 0.3, magnesium powder 0.7, NaF0.1, water 9, polyethylene glycol 0.1; Preparation method is: be added to the water by polyethylene glycol, add magnesium powder after stirring, be heated to 75 DEG C, stir 25 minutes, ultrasonic disperse 3.5 minutes, add P, vanadium oxide, boron oxide, titanium, SnO, Bi2O3, Mn again, stir 13 minutes under 7500 revs/min, ultrasonic disperse 4.5 minutes, spraying dry, mix with other residual components, be ground to granularity and be less than 5 μm, to obtain final product.
The preparation method of described valve high tenacity iron-base powder metallurgy material, comprises the following steps:
(1) by carbonyl iron dust, Al2O3 mixing, add in 1% sodium carbonate liquor of 3.5 times of weight portions, be heated to 45 DEG C, stir 13 minutes, filter, add the water washing of 3.5 times of weight portions, repeated washing 2 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 portions, add silane coupler kh-550, stir 13 minutes, be heated to 65 DEG C, then add the iron powder of iron aluminum silicon powder, iron-base nanometer crystal alloy powder, 0.7 weight portion, 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 polyethylene glycol, inferior sodium phosphate, be heated to 66 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 residual components, ball milling, shaping, sintering, finished machined, to obtain final product.
Experimental data:
The hardness HB of this embodiment valve material is 64 after tested, and density is 95.47%, voidage 9.45%, and fracture toughness is 14.7MPam
1/2, compression strength is 149MPa, and bending strength is 506MPa.
Claims (2)
1. a valve high tenacity iron-base powder metallurgy material, is characterized in that being made up of the raw material of following weight portion: atomized iron powder 20-25, Al2O3 7-9, carbonyl iron dust 5-6, copper powder 1.2-1.6, molybdenum powder 3-5, rare earth ferrosilicon 1-2, iron aluminum silicon powder 1-2, iron-base nanometer crystal alloy powder 3-4, nanocrystalline ferro-boron fining agent 0.4-0.7, silane coupler kh-550 0.6-0.8,1% sodium carbonate liquor are appropriate, water appropriate, inferior sodium phosphate 2.5-3.5, polyethylene glycol 0.4-0.6,2Mol/L copper-bath 30-35, wetting aid 2-3, iron powder 50-54;
Described wetting aid is made up of the raw material of following weight portion: Ga1-2, P1-1.3, boron oxide 0.8-1.4, titanium 1.4-1.6, Mn 1.3-1.6, vanadium oxide 0.6-0.9, SnO0.3-0.5, Bi2O3 0.2-0.4, magnesium powder 0.6-0.9, NaF0.1-0.2, water 8-10, polyethylene glycol 0.1-0.2; Preparation method is: be added to the water by polyethylene glycol, add magnesium powder after stirring, be heated to 70-80 DEG C, stir 20-30 minute, ultrasonic disperse 3-4 minute, add P, vanadium oxide, boron oxide, titanium, SnO, Bi2O3, Mn again, under 7000-8000 rev/min, stir 10-15 minute, ultrasonic disperse 4-5 minute, spraying dry, mix with other residual components, be ground to granularity and be less than 5 μm, to obtain final product.
2. the valve preparation method of high tenacity iron-base powder metallurgy material according to claim 1, is characterized in that comprising the following steps:
(1) by carbonyl iron dust, Al2O3 mixing, add in 1% sodium carbonate liquor of 3-4 times of weight portion, be heated to 40-50 DEG C, stir 10-15 minute, filter, add the water washing of 3-4 times of weight portion, 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 portion, add silane coupler kh-550, stir 10-15 minute, be heated to 60-70 DEG C, then add the iron powder of iron aluminum silicon powder, iron-base nanometer crystal alloy powder, 0.6-0.8 weight portion, 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 polyethylene 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 residual components, ball milling, shaping, sintering, finished machined, to obtain final product.
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| CN201410818957.7A CN104550915A (en) | 2014-12-25 | 2014-12-25 | High-ductility iron-base powder metallurgy material used for valve and preparation method of high-ductility iron-base powder metallurgy material |
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| CN201410818957.7A CN104550915A (en) | 2014-12-25 | 2014-12-25 | High-ductility iron-base powder metallurgy material used for valve and preparation method of high-ductility iron-base powder metallurgy material |
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| CN103600065A (en) * | 2013-10-14 | 2014-02-26 | 富莱茵汽车部件有限公司 | Powder metallurgy gear and manufacturing method thereof |
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| CN104057090A (en) * | 2013-03-20 | 2014-09-24 | 江苏天一超细金属粉末有限公司 | Method for removing printing metal, ceramic product metal, ceramic powder and polymer mixed material and polymer from finished product |
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- 2014-12-25 CN CN201410818957.7A patent/CN104550915A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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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 |
| CN102586670A (en) * | 2012-03-05 | 2012-07-18 | 江苏汤臣汽车零部件有限公司 | Iron-based composite material reinforced by in-situ titanium carbide grains and preparing method thereof |
| CN104057090A (en) * | 2013-03-20 | 2014-09-24 | 江苏天一超细金属粉末有限公司 | Method for removing printing metal, ceramic product metal, ceramic powder and polymer mixed material and polymer from finished product |
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Application publication date: 20150429 |