CN1268778C - Shell cover material for solenoid valve and preparing method thereof - Google Patents
Shell cover material for solenoid valve and preparing method thereof Download PDFInfo
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- CN1268778C CN1268778C CN 200410025651 CN200410025651A CN1268778C CN 1268778 C CN1268778 C CN 1268778C CN 200410025651 CN200410025651 CN 200410025651 CN 200410025651 A CN200410025651 A CN 200410025651A CN 1268778 C CN1268778 C CN 1268778C
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Abstract
The present invention discloses a sealing material for an electromagnetic valve, which has the following components of less than 0.08 wt% of C, 0.8 to 2.5 wt% of Si, 12 to 16 wt% of Cr, 0.2 to 0.6 wt% of Mn, 0.2 to 0.4 wt% of S, 0.2 to 0.6 wt% of Ti, 0 to 0.1 wt% of rare earth and Fe as the rest. Alloy containing components satisfying the requirements can obtain steel billets by using a traditional casting method, and proximate matter in desired shapes can be obtained then by forging and hot rolling or cold rolling the steel billets or by using a powder metallurgy molding method. The proximate matter is finally annealed at the temperature of more than 800 DEG C. The material has the advantages of low cost, good corrosion resistance and convenient machining. Moreover, the material has good soft magnetic properties.
Description
Technical field
The present invention relates to magneticsubstance, relate in particular to a kind of magnetic valve seal head material and preparation method thereof.
Background technology
Soft magnetic materials is the important materials of widespread use in power industry and the electronic industry.In power industry, to the process of utilization (electric motor), soft magnetic materials plays a part energy transformation from the generation (generator) of electric energy, transmission (transformer).In electronic industry, to microwave technology, soft magnetic materials plays the effects such as conversion, transmission and storage of information from communication, control automatically, broadcasting, TV and film, electronic computation technology.The performance Chang Yinying of soft magnetic materials with and different, but wish that usually the magnetic permeability μ of material wants high, and coercivity H and loss Pc are low.
It is the crystalline material of representative that soft magnetic materials mainly contains with metal soft magnetic material and soft magnetic ferrites, the nano-crystal soft magnetic alloy that amorphous soft magnetic alloy and development in recent years are got up etc.The interelectric exchange interaction of metal soft magnetic material is strong, thereby saturation induction density Bs height, Curie temperature height.But because its resistivity is low, the big and skin effect of eddy-current loss only is suitable for using under the low frequency; Soft magnetic ferrites are ferrimagnetisms, and interelectric exchange interaction is indirect, and two groups of neighbour's time grid magnetic moment direction are opposite, so saturation induction density Bs is low, Curie temperature is low.But its resistivity height is particularly suitable for using under high frequency.Though the Bs of amorphous, nanocrystalline material is more or less the same with metal soft magnetic material, its coercivity H is much smaller.Compare with crystalline material, amorphous material has high strength, high corrosion resistance, high-magnetostriction coefficient, high electromechanical coupling factor and the characteristic of high resistivity usually.
Along with the fast development of automatic control technology, magnetic valve is not only required higher dynamic magnetic performance with end socket, and require to have corrosion resistance nature preferably.In order to improve the market competitiveness, require that precious metal element content reduces as far as possible in the material, manufacturing process is easy as far as possible.Soft magnetic materials commonly used at present is difficult to satisfy above-mentioned requirements.
Though pure iron has higher saturation induction density (2.1T) and initial permeability (7500), low coercive force (56A/m).But (130 μ Ω mm) is lower for its resistivity, and frequency applications power loss height only is applicable to low frequency.But also there is corrosion-prone problem.Though there is corrosion-prone problem in silicon steel resistivity equally than pure iron height (400 μ Ω mm), just must be electroplated for guaranteeing its solidity to corrosion, this has not only increased production cost but also environmental pollution problem is arranged.Though soft magnetic ferrite resistivity height is corrosion-resistant, its saturation induction density is too low, is not suitable for controlling elementss such as magnetic valve.Though stainless steel commonly used has excellent corrosion resisting performance, its magnetic property can not satisfy the requirement of magnetic valve end socket.Therefore it is very important to develop anti-corrosion soft magnetic materials.
Summary of the invention
The purpose of this invention is to provide a kind of magnetic valve seal head material and preparation method thereof.
Magnetic valve satisfies (weight) with the seal head material chemical ingredients: C content is less than 0.08%, and Si content is 0.8～2.5%, and Cr content is 12～16%, Mn content is 0.2～0.6%, and S content is 0.2～0.4%, and Ti content is 0.2～0.6%, rare earth RE content is less than 0.1%, and all the other are iron.
A kind of magnetic valve preparation method of seal head material: according to above-mentioned chemical ingredients, with pure iron, low carbon ferrochromium, molybdenum-iron, ferrosilicon, ferromanganese are starting material, adopt the method continuous casting of induction melting to become steel billet, steel billet 900～1150 ℃ carry out hammer cogging after, be rolled into section bar in 900～1150 ℃ again.
Hot rolled section bar needs to handle 1～6 hour down through 800～1150 ℃ through cold worked part at last, then furnace cooling or air cooling.
The another kind of magnetic valve preparation method of seal head material: according to above-mentioned chemical ingredients, with pure iron, low carbon ferrochromium, molybdenum-iron, ferrosilicon, ferromanganese are starting material, adopt water atomization to make 80～120 order purpose powder, powder is pressed into base through mixing the back in mould, behind the pressed compact under vacuum through 300～600 ℃ of dewaxings, under vacuum, sinter section bar at last through 1000～1200 ℃.
The section bar that sinters into needs to handle 1～6 hour down through 800～1150 ℃ through cold worked part at last, then furnace cooling or air cooling.
Compared with prior art, the present invention has following advantage:
1) the magnetic valve seal head material with the present invention's preparation has the better dynamic magnetic property: when magnetizing field H=0.625KOe (50KA/m), and saturation induction density Bs 〉=15KGs (1.5T), HCJ Hcj≤5Oe (400A/m).Impact back residual magnetic flux density Br≤6Gs (0.0006T).
2) owing to contain Cr and Ti alloying element, alloy has higher corrosion resistance nature, salt mist experiment nondiscoloration after 56 hours.
3) alloy has the favorable mechanical processing characteristics, has the good mechanical performance simultaneously.Tensile strength is greater than 400MPa, and hardness is HRB83～96.
Embodiment
In order to improve the corrosion resistance nature of alloy, the Cr element must be added into.Studies show that working as Cr content is higher than after 8%, the corrosion resistance nature of alloy just can be significantly improved.But the adding of Cr element will cause the reduction of magnetic property, particularly saturation induction density Bs.In addition, the Cr price is more expensive, adds and too much will improve manufacturing cost.Guaranteeing under the excellent corrosion resisting performance that Cr content is preferred 12～16%, this moment, alloy had good soft magnetic performance, and manufacturing cost is lower.
C improves the coercive force of alloy, influences the soft magnetic performance of alloy, also can reduce the corrosion resistance nature of alloy simultaneously.For corrosion resistance nature and magnetic property, C content is low more good more.But consider from preparation cost, but after C content is lower than 0.08%, alloy possess good corrosion resistance can and magnetic property in, cost is also more cheap.
The adding of Si element can significantly improve the soft magnetic performance of alloy, but the Si adding too much, and the fragility of alloy will be increased, so Si content preferred 0.5～2.5%.
In order further to improve the corrosion resistance nature of alloy, added a spot of Ti.Owing to the reduction that affiliation causes magnetic property that adds of Ti, so Ti content is preferably 0.2～0.6%.
For improving the machinability of alloy, added a certain amount of S.The adding of S worsens the magnetic property of alloy equally, and content is preferably 0.2～0.4%.
Be cleaning molten steel, can add a spot of RE.
Be to eliminate the machining stress in the preparation process, obtain the microtexture of magnetic property excellence, alloy needs at last through the high temperature annealing more than 800 ℃, and optimum range is generally at 900～1100 ℃, furnace cooling or air cooling.
Embodiment 1
Component design is 0.07% for (wt%): C, and Cr is 12.50%, and Si is 1.0%, and S is 0.2%, and Ti is 0.25%, and Mn is 0.30%, and RE is 0.08%, Yu Weitie.Component prescription according to design adopts pure iron, low carbon ferrochromium, ferrosilicon, titanium sponge, ferromanganese and rare earth ferrosilicon etc. are starting material, adopting the method continuous casting of induction melting to become diameter is Φ 100mm pole, pole 900～1150 ℃ carry out hammer cogging after, again in 900～1150 ℃ of poles that are rolled into Φ 10mm.Under nitrogen protection, through 900 ℃ of insulations 5 hours, furnace cooling was to room temperature at last for Φ 10mm pole.After testing, alloy property is:
Magnetic property: under H=50kA/m magnetic field, saturation induction density Bs=16.5KGs (1.65T),
Coercivity H j=3.58Oe (286A/m),
Residual magnetic flux density Br=5.5Gs after the impact (0.00055T),
Corrosion resistance nature: salt mist experiment nondiscoloration in 56 hours.
Mechanical property: tensile strength 426MPa, hardness HRB95.
Embodiment 2
Component design is 0.05% for (wt%): C, and Cr is 13.50%, and Si is 1.5%, and S is 0.3%, and Ti is 0.35%, and Mn is 0.50%, and RE is 0.08%, Yu Weitie.Component prescription according to design adopts pure iron, low carbon ferrochromium, ferrosilicon, titanium sponge, ferromanganese and rare earth ferrosilicon etc. are starting material, adopting the method continuous casting of induction melting to become diameter is Φ 100mm pole, pole 900～1150 ℃ carry out hammer cogging after, again in 900～1150 ℃ of poles that are rolled into Φ 10mm.Under nitrogen protection, through 900 ℃ of insulations 5 hours, furnace cooling was to room temperature at last for Φ 10mm pole.After testing, alloy property is:
Magnetic property: under H=50kA/m magnetic field, saturation induction density Bs=16.8KGs (1.68T),
Coercivity H j=3.08Oe (246A/m),
Residual magnetic flux density Br=5.6Gs after the impact (0.00056T),
Corrosion resistance nature: salt mist experiment nondiscoloration in 56 hours.
Mechanical property: tensile strength 416MPa, hardness HRB90.
Embodiment 3
Component design is 0.03% for (wt%): C, and Cr is 13.50%, and Si is 2.5%, and S is 0.2%, and Ti is 0.30%, and Mn is 0.50%, and RE is 0.08%, Yu Weitie.Component prescription according to design adopts pure iron, chromium metal, Pure Silicon Metal, titanium sponge, manganese metal and rare earth ferrosilicon etc. are starting material, adopting the method continuous casting of induction melting to become diameter is Φ 100mm pole, pole 900～1150 ℃ carry out hammer cogging after, again in 900～1150 ℃ of poles that are rolled into Φ 10mm.Under nitrogen protection, through 900 ℃ of insulations 5 hours, furnace cooling was to room temperature at last for Φ 10mm pole.After testing, alloy property is:
Magnetic property: under H=50kA/m magnetic field, saturation induction density Bs=16.8KGs (1.68T),
Coercivity H j=2.83Oe (226A/m),
Residual magnetic flux density Br=5.3Gs after the impact (0.00053T),
Corrosion resistance nature: salt mist experiment nondiscoloration in 56 hours.
Mechanical property: tensile strength 410MPa, hardness HRB88.
Embodiment 4
Component design is 0.02% for (wt%): C, and Cr is 14.50%, and Si is 2.0%, and S is 0.2%, and Ti is 0.4%, and Mn is 0.6%, Yu Weitie.Component prescription according to design adopts pure iron, chromium metal, Pure Silicon Metal, manganese metal and titanium sponge etc. are starting material, it is Φ 100mm pole that molten steel behind induction melting continuous casting behind vacuum oxygen decarburization equipment (VOD) secondary refining becomes diameter, pole 900～1150 ℃ carry out hammer cogging after, again in 900～1150 ℃ of poles that are rolled into Φ 10mm.Under nitrogen protection, through 1000 ℃ of insulations 3 hours, furnace cooling was to room temperature at last for Φ 10mm pole.After testing, alloy property is:
Magnetic property: under H=50kA/m magnetic field, saturation induction density Bs=17.5KGs (1.75T),
Coercivity H j=2.58Oe (206A/m),
Residual magnetic flux density Br=6.0Gs after the impact (0.0006T)
Corrosion resistance nature: salt mist experiment nondiscoloration in 56 hours.
Mechanical property: tensile strength 405MPa, hardness HRB88.
Embodiment 5
Component design is 0.02% for (wt%): C, and Cr is 15.50%, and Si is 2.0%, and S is 0.3%, and Ti is 0.4%, and Mn is 0.6%, Yu Weitie.Component prescription according to design adopts pure iron, low carbon ferrochromium, ferrosilicon, manganese metal and titanium sponge etc. are starting material, it is Φ 100mm pole that molten steel behind induction melting continuous casting behind vacuum oxygen decarburization equipment (VOD) secondary refining becomes diameter, pole 900～1150 ℃ carry out hammer cogging after, again in 900～1150 ℃ of poles that are rolled into Φ 10mm.Under nitrogen protection, through 1000 ℃ of insulations 3 hours, furnace cooling was to room temperature at last for Φ 10mm pole.After testing, alloy property is:
Magnetic property: under H=50kA/m magnetic field, saturation induction density Bs=17.5KGs (1.75T),
Coercivity H j=2.31Oe (185A/m),
Residual magnetic flux density Br=5.8Gs after the impact (0.00058T)
Corrosion resistance nature: salt mist experiment nondiscoloration in 56 hours.
Mechanical property: tensile strength 406MPa, hardness HRB87.
Embodiment 6
Component design is 0.07% for (wt%): C, and Cr is 12.5%, and Si is 1.0%, and S is 0.3%, and Ti is 0.3%, and Mn is 0.6%, Yu Weitie.Component prescription according to design, pure iron, low carbon ferrochromium, ferrosilicon, manganese metal and titanium sponge etc. are made 100 purpose powder for starting material adopt water atomization, and powder is pressed into base through mixing the back under the pressure of 570MPa, then in the following 500 ℃ * 30min dewaxing of 0.13Pa vacuum, at last under 0.13Pa through 1150 ℃ * 1h sinter molding, air cooling, at last again through 850 ℃ the insulation 3 hours stoves cold.The composition of alloy and performance are after testing:
Magnetic property: under H=50kA/m magnetic field, saturation induction density Bs=17.1KGs (1.71T),
Coercivity H j=3.10Oe (248A/m),
Residual magnetic flux density Br=5.9Gs after the impact (0.00059T)
Corrosion resistance nature: salt mist experiment nondiscoloration in 56 hours.
Mechanical property: tensile strength 426MPa, hardness HRB96
Embodiment 7
Component design is 0.04% for (wt%): C, and Cr is 14.0%, and Si is 1.5%, and S is 0.2%, and Ti is 0.3%, and Mn is 0.60%, Yu Weitie.Component prescription according to design, with pure iron, chromium metal, Pure Silicon Metal, manganese metal and titanium sponge etc. are made 100 purpose powder for starting material adopt water atomization, and powder is pressed into base through mixing the back under the pressure of 570MPa, then in the following 500 ℃ * 30min dewaxing of 0.13Pa vacuum, at last under 0.13Pa through 1150 ℃ * 1h sinter molding, air cooling, at last again through 850 ℃ the insulation 3 hours stoves cold.The composition of alloy and performance are after testing:
Magnetic property: under H=50kA/m magnetic field, saturation induction density Bs=17.5KGs (1.75T),
Coercivity H j=2.7Oe (216A/m),
Residual magnetic flux density Br=6.0Gs after the impact (0.0006T)
Corrosion resistance nature: salt mist experiment nondiscoloration in 56 hours.
Mechanical property: tensile strength 412MPa, hardness HRB89
Embodiment 8
Component design is 0.02% for (wt%): C, and Cr is 15.0%, and Si is 2.5%, and S is 0.2%, and Ti is 0.4%, and Mn is 0.60%, Yu Weitie.Component prescription according to design, with pure iron, chromium metal, Pure Silicon Metal, manganese metal and titanium sponge etc. are made 100 purpose powder for starting material adopt water atomization, and powder is pressed into base through mixing the back under the pressure of 570MPa, then in the following 500 ℃ * 30min dewaxing of 0.13Pa vacuum, at last under 0.13Pa through 1100 ℃ * 1h sinter molding, air cooling, at last again through 850 ℃ the insulation 3 hours stoves cold.The composition of alloy and performance are after testing:
Magnetic property: under H=50kA/m magnetic field, saturation induction density Bs=17.5KGs (1.75T),
Coercivity H j=2.45Oe (196A/m),
Residual magnetic flux density Br=5.8Gs after the impact (0.00058T)
Corrosion resistance nature: salt mist experiment nondiscoloration in 56 hours.
Mechanical property: tensile strength 405MPa, hardness HRB83
Claims (5)
1, a kind of magnetic valve seal head material, it is characterized in that chemical component weight per-cent satisfies: C content is less than 0.08%, Si content is 0.8～2.5%, Cr content is 12～16%, Mn content is 0.2～0.6%, and S content is 0.2～0.4%, and Ti content is 0.2～0.6%, rare earth RE content is less than 0.1%, and all the other are iron.
2, a kind of magnetic valve preparation method of seal head material, it is characterized in that: according to the chemical ingredients of claim 1 record, with pure iron, low carbon ferrochromium, molybdenum-iron, ferrosilicon, ferromanganese is starting material, adopt the method continuous casting of induction melting to become steel billet, steel billet 900～1150 ℃ carry out hammer cogging after, be rolled into section bar in 900～1150 ℃ again.
3, a kind of magnetic valve according to claim 2 is characterized in that said hot rolled section bar needs to handle 1～6 hour down through 800～1150 ℃ through cold worked part at last, then furnace cooling or air cooling with the preparation method of seal head material.
4, a kind of magnetic valve preparation method of seal head material, it is characterized in that: according to the chemical ingredients of claim 1 record, with pure iron, low carbon ferrochromium, molybdenum-iron, ferrosilicon, ferromanganese is starting material, adopts water atomization to make 80～120 purpose powder, and powder is pressed into base through mixing the back in mould, pressed compact through 300～600 ℃ of dewaxings, sinters section bar into through 1000～1200 ℃ at last under vacuum under vacuum.
5, a kind of magnetic valve according to claim 4 is characterized in that with the preparation method of seal head material, and the said section bar that sinters into needs to handle 1～6 hour down through 800～1150 ℃ through cold worked part at last, then furnace cooling or air cooling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410025651 CN1268778C (en) | 2004-06-22 | 2004-06-22 | Shell cover material for solenoid valve and preparing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410025651 CN1268778C (en) | 2004-06-22 | 2004-06-22 | Shell cover material for solenoid valve and preparing method thereof |
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| Publication Number | Publication Date |
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| CN1594638A CN1594638A (en) | 2005-03-16 |
| CN1268778C true CN1268778C (en) | 2006-08-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200410025651 Expired - Fee Related CN1268778C (en) | 2004-06-22 | 2004-06-22 | Shell cover material for solenoid valve and preparing method thereof |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102581556B (en) * | 2012-02-23 | 2014-05-28 | 绍兴康健精密不锈钢有限公司 | Processing technology of static iron core of electromagnetic valve |
| CN109837471A (en) * | 2017-11-29 | 2019-06-04 | 宜兴市联丰化工机械有限公司 | A kind of Seal head blank production technology |
| CN110318009B (en) * | 2019-07-03 | 2020-10-27 | 衡阳市金则利特种合金股份有限公司 | Alloy material for electromagnetic valve easy to cold heading |
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Application publication date: 20050316 Assignee: Dongyang City Yu Ci Industrial Co., Ltd. Assignor: Zhejiang University Contract record no.: 2013330000356 Denomination of invention: Shell cover material for solenoid valve and preparing method thereof Granted publication date: 20060809 License type: Exclusive License Record date: 20131127 |
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