CN1629365A - High silicon content ferrous alloy electrode plate for pickling cells and method for making same - Google Patents
High silicon content ferrous alloy electrode plate for pickling cells and method for making same Download PDFInfo
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- CN1629365A CN1629365A CN 200410064501 CN200410064501A CN1629365A CN 1629365 A CN1629365 A CN 1629365A CN 200410064501 CN200410064501 CN 200410064501 CN 200410064501 A CN200410064501 A CN 200410064501A CN 1629365 A CN1629365 A CN 1629365A
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Abstract
The invention provides a high silicon-ferrum based electrode plate for pickling tank and its making process, wherein the electrode plate comprises Si 14.4-18.0%, C 0.4-0.8%, Mn 0.1-0.8%, P<0.03%, S<0.02%, Cu 1.8-10.0%, RE 0.01-0.05%, and balancing impurity and Fe. Its making process includes alloy smelting, deterioration treatment, cast forming, and thermal treatment.
Description
Technical field
The present invention relates to a kind of pickling tub alloy electrode plate and manufacture method thereof.
Background technology
After the cold rolled annealed processing of stainless steel plate, the oxide skin and the stain that have some amount on its surface, generally all must remove these oxide skins and stain through surface treatment, pickling is one of cold rolled stainless steel sheet surface treatment method commonly used, in order to improve surface-treated efficient and effect, adopt pyritous sulfuric acid, nitric acid and metabisulfite solution as pickle solution, in pickling tub, carry out pickling under the power on condition, improve pickle solution and the oxide skin on cold rolled stainless steel sheet surface and the speed of response of stain.Battery lead plate in the pickling tub is immersed in the pickle solution for a long time, under the low-voltage and high-current situation, be subjected to pyritous sulfuric acid, nitric acid and metabisulfite solution intensive corrosive nature, working conditions is very harsh, therefore very high to making the stainless steel plate pickling tub with the requirement of battery lead plate, the anti-strong acid corrosive power of battery lead plate material particularly, the material that requires simultaneously to make battery lead plate must have certain electroconductibility and certain anti-pulse shock performance and intensity, common corrosion-resistant material can not satisfy these conditions, have good solidity to corrosion as pottery and plastics, but non-conductive; Stainless steel surface can form the C of one deck densification
R2O
3Passive film has good solidity to corrosion in the environment of general corrosion, but this C
R2O
3Passive film is also unstable in the strong oxidizing property acid medium, can not satisfy the working conditions of pickling tub.The main chemical compositions (weight percentage) of existing high silicon iron-base alloy is:
STSi-15 C?0.5-10％ Si 14.5-15.75％ Mn≤0.5％
P＜0.1％ S＜0.06％
STSi.-17 C?0.35-0.8％ Si?14.5-15.75％ Mn≤0.5％
P＜0.1％ S＜0.02％
All the other are the component of unavoidable impurities and Fe, and the surface can form the SiO of one deck densification
2Oxide film, this acidic oxidation film is still very stable in the strong oxidizing property acid medium, therefore high silicon iron-base alloy has good solidity to corrosion in the strong oxidizing property acid medium, be a kind of good anti-sulfuric acid, the casting non-corrosive metal of acid with strong oxidizing property such as nitric acid, and cost is low, be usually used in making the parts that contact with various strong corrosive mediums that bear static load, flow passage part as acid proof pump in the chemical industry, various valve partses, these parts are only required the solidity to corrosion and the mechanical property of alloy, the electroconductibility of alloy is not had any requirement, and this high silicon iron-base alloy can not be used to prepare the battery lead plate of pickling tub.
Though high silicon iron-base alloy is a kind of non-corrosive metal of good cheapness, but have that intensity and impelling strength are low, hardness is big, fragility is big, thermal conductivity is little and shortcoming such as the coefficient of expansion is big, when casting, be easy to produce scarce limits such as shrinkage porosite, shrinkage cavity and crackle, can not stand violent temperature variation and bear high pressure, mechanical workout is difficulty relatively.Especially when the bigger foundry goods of manufactured size, shape more difficultly, reach 2.5 meters pickling tub battery lead plate with high silicon iron-base alloy casting processing length, difficulty is big, and qualification rate is low.
Summary of the invention
In order to overcome the deficiency of existing pickling tub with the big battery lead plate solidity to corrosion difference of physical dimension, the invention provides a kind of corrosion proof pickling tub battery lead plate, a kind of manufacture method of this battery lead plate is provided simultaneously.
Technical scheme of the present invention mainly is to improve the solidity to corrosion and the electroconductibility of high silicon iron-base alloy, reaches purpose of the present invention from two aspects.The one, utilize existing high silicon iron-base alloy surface can form the SiO of the powerful oxidation corrosion resistance acid medium of one deck densification
2Oxide film has the advantage that good solidity to corrosion also can be born static load in the strong oxidizing property acid medium, add copper and change the composition of high silicon iron-base alloy to overcome the shortcoming of poorly conductive when casting; The 2nd, add the solidity to corrosion element that some improve high silicon iron-base alloy, make high silicon iron-base alloy meet the requirement of pickling tub electrode in solidity to corrosion, intensity and electroconductibility.Simultaneously harmful element has been carried out strict control.
It is solidity to corrosion and electroconductibility that the present invention will solve two major technique keys, and emphasis is the chemical ingredients of pickling tub battery lead plate, rather than shape.The performance of chemical ingredients and microtexture decision alloy, bright for the present invention, improve corrosion proof key and be that it is passive film that alloy surface generates fine and close oxide film, can generate the modal Cr of having of element, the Al of dense oxidation film and Si etc., Cr is the passive film forming element that generally adopts in stainless steel, in the general corrosion medium, has good solidity to corrosion, but this passive film solidity to corrosion in strong acid solutions such as sulfuric acid or nitric acid that contains chromium is poor, can not satisfy the requirement of the battery lead plate of pickling tub.Al is mainly used in the refractory alloy, the Al of generation
2O
3Passive film at high temperature has good stability and compactness, but because the fusing point of aluminium and iron differs bigger, the alloy melting difficulty that aluminum content is high, thereby can not be used for being immersed in the ferrous alloy of strong acid.The oxide film that Si forms has good stability in strong acid solution, have excellent corrosion resistant performance in strong acid media, can be used as the element main against corrosion of alloy.In ferrous alloy, add silicon, can form fine and close SiO
2Oxide film, the silicon add-on is followed the n/8 rule in the alloy increases, be the Siliciumatom number and the ratio of iron unit subnumber equals 1/8,2/8 ... n/8, this oxide film is fine and close and complete more, the solidity to corrosion of alloy further increases with great-jump-forward, when silicon content is lower than 14.36%, and the oxidated iron film control of solidity to corrosion, silicon content is higher than at 14.36% o'clock, and solidity to corrosion is controlled by silicon dioxide film.Therefore the silicon that must contain in the cast iron is not less than and just had good solidity to corrosion at 14.36% o'clock, can generate the stable fragility phase Fe that is situated between because silicon content is too high
5Si
2, the fragility of increase alloy material, therefore, the content of silicon is up to 18%.
Carbon is the basal component in the ferrous alloy, and for the solidity to corrosion that improves high silicon iron-base alloy should improve silicone content in the alloy, but the silicone content in this alloy is high more, and carbon content should be low more.The carbon content of reasonably controlling in the high silicon iron-base alloy also is a key problem in technology of the present invention.Rational carbon content is the hypoeutectic composition or the eutectic composition of this high silicon iron-base alloy quite.Because the dissolving power of silicon in alpha ferrite is stronger than carbon, and silicon has quickened the diffusion of carbon again, therefore carbon is just squeezed out by silicon and forms free flake graphite, increase along with the carbon content of alloy, the size of the flake graphite of separating out increases, and quantity increases, and forms more cavity and constitutes more microbattery, cause serious tissue looseness, reduced the mechanical property and the solidity to corrosion of alloy.So the carbon content of high silicon iron-base alloy is selected in 0.1-0.8%.
Manganese is a kind of element that enlarges the austenitic area in ferrous alloy, and silicon is to dwindle austenitic element, a spot of manganese will be solid-solubilized in high silicon iron-base alloy in the alpha ferrite, and will be not obvious to the solidity to corrosion and the mechanical property influence of alloy, because manganese is bigger at the Solidification Segregation coefficient, as easy as rolling off a log enrichment between the tree lath, make composition profiles inhomogeneous, cause the difference in Electrode Potential of local microcell, even form the microbattery effect, reduce the solidity to corrosion of alloy, so Mn is controlled between the 0.3-0.8%.
Phosphorus is a kind of harmful element in high silicon iron-base alloy, can increase the fragility of alloy, requires its content below 0.03%.
Sulphur is harmful element in high silicon cast iron, significantly reduces the solidity to corrosion and the mechanical property of the anti-corrosion ferrous alloy of high silicon, and sulphur content should be strict controlled in below 0.02%.
Copper has higher electropotential, adds the copper of some amount in high silicon iron-base alloy, can improve the total electropotential of alloy, plays a part activated cathode in corrosion process, and can impel matrix under certain condition is anode passivation, reduces erosion rate.Experiment confirm, copper can be enriched near in the rusty scale of matrix metal, improve the rusty scale protective value, also can strengthen its activated cathode effect, improve the cast iron solidity to corrosion.And copper can improve the conductivity and the mechanical property of high silicon iron-base alloy battery lead plate, improves intensity and toughness, reduces hardness, and the cupric high silicon iron-base alloy can carry out car, plane, boring, hank knotting processing, and copper content is 1.8%-10.0%.
Rare earth is a kind of active element, adds in right amount in the alloy to produce good effect.Remaining in the interior trace rare-earth of cast iron can influence the solidity to corrosion of cast iron significantly.It is generally acknowledged that this is because rare earth has changed due to the sticking toughness of oxide film of Cast Iron Surface.In high silicon iron-base alloy, add rare earth content and will determine that the residual quantity in high silicon iron-base alloy is controlled at 0.01%-0.05% according to the air content of molten iron.
The chemical ingredients (weight percentage) of selecting this pickling tub high silicon iron-base alloy battery lead plate through test for many years is:
Si 14.4％-18.0％ C?0.4％-0.8％
Mn 0.1％-0.8％ P＜0.03％ S＜0.02％
All the other are the component of unavoidable impurities and Fe for Cu 1.8%-10.0% RE 0.01%-0.05%.
The chemical ingredients (weight percentage) of the best of this pickling tub high silicon iron-base alloy battery lead plate is:
Si 1?6.2％ C?0.6％
Mn?0.5％ P＜0.03％ S＜0.02％
All the other are the component of unavoidable impurities and Fe for Cu 9.00% RE 0.03%.
In order to eliminate stress, behind the casting solidification that is cast into above-mentioned molten iron, under the red heat state, open mold promptly about 700 ℃-750 ℃ the time, the foundry goods of red heat directly packed into be heated in advance in the heat treatment furnace more than 650 ℃, after the temperature of foundry goods was lower than 1250 ℃, hot shake-out was carried out in 5-10 minute in the casting solidification back that is shaped, and the foundry goods of red heat is carried out anneal immediately, the foundry goods hot charging is gone into resistance furnace even heating to 750 ℃-950 ℃, is incubated 2-5 hour stove and is as cold as below 100 ℃ and comes out of the stove.
The manufacture method of stainless steel plate pickling tub battery lead plate of the present invention comprises the steps:
(1) alloy melting---adopt smelting process twice with induction furnace or electric arc furnace with acid lining, the purpose of melting for the first time is a batch mixing, evenly can form the master alloy about 14.5% with all raw materials are melt-blended, and it is standby to pour into ingot.The starting material of molten alloy have the pig iron (as Z18), high-quality steel scrap (as A3 dry, few rust), ferrosilicon (as 75 ferrosilicon), electrolytic copper and foundry returns.Order reinforced during melting is followed successively by: high-quality steel scrap, the pig iron, foundry returns, ferrosilicon, electrolytic copper; The raw material of melting for the second time is the ingot that the first time, smelting and pouring became, and purpose is degassing slagging-off, obtains high duty alloy liquid.For accumulated slag and purifying molten iron, in twice fusion process, add acid slag former, simultaneously, can reduce the scaling loss of element in the alloy melting process.Smelting temperature is 1450 ℃-1500 ℃, after the fusing, leaves standstill the sufficiently long time can come out of the stove, and general time of repose is not less than 30 minutes, and to remove gas and the inclusion in the alloy liquid, tapping temperature is 1400 ℃-1450 ℃;
(2) cast form---poured apparatus is the important content of casting technique, is the important step that is related to casting quality.For collapsibility and the deformability of strengthening casting mold, reduce casting stress, prevent that castingprocesses from cracking, adopt resin bonded sand mould or porous plastics vaporization die cast to be shaped.The molten iron after the melting for the second time, the pouring procedure that adopts low temperature to water soon is poured in the die cavity of resin bonded sand mould or porous plastics vaporization mould, and teeming temperature is 1300 ℃-1350 ℃, the too high meeting of temperature causes a large amount of shrinkage porosite of foundry goods, and teeming temperature is crossed the low casting flaw that can produce misrun.In order to strengthen the slag effect of suppressing of gating system, adopt the enclosed casting system of unhurried current during cast, the ratio of the cross-sectional area of sprue, cross gate and ingate constituent element is A
Directly: A
Horizontal: A
In=1.1-1.3: 1.5-1.7: 1.0, in order further to strengthen the slag effect of suppressing of gating system, on the cross gate constituent element of gating system, add fibrous filter net, wherein A
Directly, A
HorizontalAnd A
InBe respectively the cross-sectional area of sprue, cross gate and ingate.
(3) thermal treatment---current experiments shows, the necessary annealed thermal treatment of high silicon iron-base alloy battery lead plate foundry goods, and this not only helps improving the mechanical property of alloy, and can guarantee to cool off slowly, eliminates thermal stresses.Behind casting solidification, under the red heat state, open mold promptly about 700 ℃-750 ℃ the time, the foundry goods of red heat is directly packed into is heated to thermal treatment furnace annealing thermal treatment more than 650 ℃ in advance.
For crystal grain thinning and purification alloy, behind the alloy melting of above-mentioned stainless steel plate pickling tub electrode plate manufacturing method, do rotten the processing before the cast, when the chemical ingredients of the molten iron of melting reaches requirement, pour alloy the rare earth ferrosilicon alloy of bag end adding into as alterant, the add-on of alterant is for handling the 0.2-1.5% of weight of molten iron, and melted molten iron is for the second time poured in the hot metal ladle and the rare earth ferrosilicon alloy reaction, and tapping temperature is 1400 ℃-1450 ℃.The molten iron after rotten the processing, be poured in the die cavity that adopts resin bonded sand mould or porous plastics vaporization model and carry out cast form again, teeming temperature is 1300 ℃-1350 ℃.
In the cast form process, fast because of the thermal conductivity extreme difference of high silicon iron-base alloy battery lead plate as speed of cooling, will cause foundry goods cracked.For this reason, when thermal treatment, behind the casting solidification of above-mentioned stainless steel plate pickling tub electrode plate manufacturing method, open mold promptly about 700 ℃-750 ℃ the time under the red heat state, the foundry goods of red heat is directly packed into is heated in the heat treatment furnace more than 650 ℃ as early as possible in advance.Generally be after being lower than 1250 ℃ with the temperature that thermopair is surveyed foundry goods, hot shake-out is carried out in 5-10 minute in the casting solidification back that is shaped.The foundry goods of red heat is carried out anneal immediately, and the foundry goods hot charging is gone into the resistance furnace even heating to 750-950 ℃, and when the furnace temperature of heat treatment furnace was in 400 ℃-100 ℃, speed of cooling was not more than 10 ℃/h, insulation 2
-5 hours stoves are as cold as below 100 ℃ comes out of the stove.
High silicon iron-base alloy battery lead plate of the present invention is compared with existing high silicon iron, and high solidity to corrosion is not only arranged, and high mechanical property and enough preferably electroconductibility are arranged, and satisfies manufactured size big as the longest fully and be 3 meters cold rolled stainless steel sheet pickling tub battery lead plate.
Description of drawings
This pickling tub of Fig. 1 front view of the embodiment of high silicon iron-base alloy electric pole plate.
Fig. 2 is and the corresponding vertical view of Fig. 1.
Fig. 3 is the front view of this pickling tub with the embodiment of high silicon iron-base alloy lower electrode plate.
Fig. 4 is and the corresponding vertical view of Fig. 3.
Fig. 5 is this pickling tub high silicon iron-base alloy electric pole plate and the pickling tub mutual alignment figure of high silicon iron-base alloy lower electrode plate under user mode.
Fig. 6 is that two identical high silicon content ferrous alloy electrode plate for pickling cells of size use installation plan.
Fig. 7 is the making schema of this high silicon content ferrous alloy electrode plate for pickling cells.
Fig. 8 is this high silicon iron-base alloy battery lead plate gating system schematic diagram.
Among the above-mentioned figure:
1, side plate 2, top board 3, base plate 4, electric wire connects hole 5, side plate 6, top board 7, base plate 8, electric wire connects hole 9, high silicon content ferrous alloy electrode plate for pickling cells 1, processed stainless-steel sheet 11, high silicon content ferrous alloy electrode plate for pickling cells 2 12, insulcrete 13, join sand 14, moulding 15, batching 16, smelt 17, mould assembling cast 18, thermal treatment 19, sprue cup 20, sprue 21, cross gate 22, fibrous filter net 23, foundry goods 24, core 25, joint face
Embodiment
Below in conjunction with embodiment and accompanying drawing thereof high silicon content ferrous alloy electrode plate for pickling cells of the present invention is elaborated, manufacture method to this high silicon iron-base alloy battery lead plate also describes in detail simultaneously, but high silicon content ferrous alloy electrode plate for pickling cells of the present invention and manufacture method thereof are not limited to following embodiment, can match according to the scope that present specification provides.
This high silicon content ferrous alloy electrode plate for pickling cells is upper and lower two and is used, pickling tub is seen Fig. 1, Fig. 2 with the shape of high silicon iron-base alloy electric pole plate 9, it is to constitute the bending plate that is ∏ shape by two side plates 1 and top board 2, respectively there is a base plate 3 in bottom at two side plates 1, in front view, be handle-shaped, connect hole 4 at base plate 3 live wires.Pickling tub is basic identical with high silicon iron-base alloy electric pole plate 9 with the shape and the pickling tub of high silicon iron-base alloy lower electrode plate 11, just the distance between biside plate 5 outer sides with the distance between high silicon iron-base alloy electric pole plate 9 biside plates 1 medial surface, is seen Fig. 3, Fig. 4 less than pickling tub.The length of two battery lead plates of present embodiment reaches 2-2.6 rice.
Pickling tub concerns referring to Fig. 5 with high silicon iron-base alloy electric pole plate 9 and the position of pickling tub with high silicon iron-base alloy lower electrode plate 11 user modes, pickling tub closes with the high silicon iron base on the following plate 11 at pickling tub with high silicon iron-base alloy electric pole plate 9, the former biside plate 1 is positioned at outside the latter's the biside plate 5, between top board 2 and top board 6, bigger interval is arranged, processed stainless-steel sheet 10 is between two top boards, gapped between side plate 1 and the side plate 5, between base plate 3 and base plate 7, separate with insulcrete 12.Also two pickling tubs can be closed down plate 11 up and down to getting up to use with the high silicon iron base, form " mouth " font between the two, see Fig. 6.
Battery lead plate embodiment one
The chemical ingredients (weight percentage) of pickling tub high silicon iron-base alloy battery lead plate is:
Si?14.4％ C 0.4％ Mn?0.1％ P＜0.03％ S＜0.02％
All the other are the component of unavoidable impurities and Fe for Cu 4.0% RE 0.01%.
Battery lead plate embodiment two
The chemical ingredients (weight percentage) of pickling tub high silicon iron-base alloy battery lead plate is:
Si?18.0％ C?0.8％
Mn?0.8％ P＜0.03％ S＜0.02％
All the other are the component of unavoidable impurities and Fe for Cu 10.0% RE 0.05%.
Battery lead plate embodiment three
The chemical ingredients (weight percentage) of pickling tub high silicon iron-base alloy battery lead plate is:
Si?16.2％ C?0.6％ Mn?0.5％ P＜0.03％ S＜0.02％
All the other are the component of unavoidable impurities and Fe for Cu 9.00% RE 0.03%.
Battery lead plate embodiment four
The chemical ingredients (weight percentage) of pickling tub high silicon iron-base alloy battery lead plate is:
Si?14.4％ C?0.4％
Mn?0.8％ P＜0.03％ S＜0.02％
All the other are the component of unavoidable impurities and Fe for Cu 10.0% RE 0.05%.
Battery lead plate embodiment five
The chemical ingredients (weight percentage) of pickling tub high silicon iron-base alloy battery lead plate is:
Si?18.0％ C?0.8％
Mn?0.1％ P＜0.03％ S＜0.02％
All the other are the component of unavoidable impurities and Fe for Cu 4.0% RE 0.01%.
Electrode plate manufacturing method embodiment
Describe the manufacture method of pickling tub battery lead plate in detail below in conjunction with pickling tub battery lead plate embodiment three.
Stainless steel plate pickling tub battery lead plate process for making of the present invention is referring to Fig. 7, join earlier sand 13 according to a conventional method, carry out moulding 14 with the shape of high silicon iron-base alloy electric pole plate 9 with the sand for preparing according to pickling tub among Fig. 1, Fig. 2, prepare burden 15 with the chemical ingredients that can realize high silicon content ferrous alloy electrode plate for pickling cells embodiment three after the melting, the material for preparing is added to smelts 16 in the induction furnace, smelt and to carry out mould assembling cast 17, the thermal treatment 18 of annealing then after composition in the molten iron of back reaches the requirement of above-mentioned battery lead plate embodiment three.
Manufacture method embodiment one
The steps in sequence of this high silicon content ferrous alloy electrode plate for pickling cells manufacture method embodiment one is as follows:
(1) alloy melting
Drying is become rusty less
390 kilograms of scrap stock that adopt steel rolling of 1 steel scrap are generally 30
#-40
#Steel, present embodiment adopts 35
#Steel
2 three low 70 kilograms of Si＜0.3% of the pig iron, S＜0.02%, the pig iron of P＜0.03%
The residue material of 220 kilograms of 3 foundry returns casting high silicon content ferrous alloy electrode plate for pickling cells as
Water prosperous mouthful
90 kilograms of 230 kilogram of 5 electrolytic coppers of 4 75 ferrosilicon
Order adds in the induction furnace of acid lining successively, be heated to 1450-1500 ℃ of melting then, all raw material is melt-blended evenly, for purifying molten iron, reduce the scaling loss of element in the alloy melting process, adding acid slag former fluorite in fusion process is 15 kilograms of fluorites, leaves standstill 10 minutes, remove gas and inclusion in the alloy liquid, pour into and cast iron ingot.
Casting iron ingot of pouring into, be added in the induction furnace and carry out the melting second time with degassing slagging-off after the fusing down at 1450 ℃-1500 ℃, in fusion process, add 15 kilograms in acid slag former fluorite, the chemical ingredients of molten iron (weight percentage) reaches:
Si 16.2％ C 0.6％
Mn 0.5％ P＜0.03％ S＜0.02％
All the other are the component of unavoidable impurities and Fe for Cu 9.00% RE 0.03%
After leaving standstill 30 minutes, come out of the stove during 1400 ℃-1450 ℃ of molten iron temperatures.
(2) cast form
Referring to Fig. 8, the pouring procedure that adopts low temperature to water soon, molten iron after the melting for the second time is poured in the die cavity that adopts the resin sand cored-up mould, teeming temperature is 1300 ℃-1350 ℃, adopt the enclosed casting system of unhurried current during casting, the ratio of the cross-sectional area of sprue, cross gate and ingate constituent element is A
Directly: A
Horizontal: A
In=1.1: 1.5: 1.0, casting solidification was shaped and carries out the hot shake-out depanning in back 8 minutes.
(3) thermal treatment
The foundry goods of red heat directly packed into be heated in advance in 650 ℃ of heat treatment furnaces, even heating to 800 thermal treatment of ℃ annealing immediately after shove charge finishes, and determine soaking time according to the size of foundry goods, present embodiment in stove three hours, after the insulation, foundry goods is slowly cooling in stove, when temperature in the stove is in 400 ℃, speed of cooling is not more than 10 ℃/h, comes out of the stove when foundry goods is cooled to below 100 ℃.
Manufacture method embodiment two
The difference of present embodiment and manufacture method embodiment one is after the melting second time, before the cast form, inserts rotten treatment process.
After the melting for the second time and leave standstill molten iron after 30 minutes, to pour the bag end into to be added with in the hot metal ladle as the rare earth ferrosilicon alloy of alterant, the add-on of alterant is 2.5 kilograms.Molten iron and 2.5 kilograms of rare earth ferrosilicon alloy alterants of pouring in the hot metal ladle react the processing of going bad in hot metal ladle.The molten iron after rotten the processing, be poured in the die cavity that adopts the resin sand cored-up mould, teeming temperature is 1300 ℃-1350 ℃ again, adopts the enclosed casting system of unhurried current during casting, carries out cast form.
Claims (8)
1, a kind of high silicon content ferrous alloy electrode plate for pickling cells, its chemical ingredients (weight percentage) is:
Si?14.4％-18.0％ C?0.4％-0.8％
Mn?0.1％-0.8％ P＜0.03％ S＜0.02％
All the other are the component of unavoidable impurities and Fe for Cu 1.8%-10.0% RE 0.01%-0.05%.
2, the full plate of pickling tub high silicon iron base according to claim 1 is characterized in that its chemical ingredients (weight percentage) is:
Si?16.2％ C?0.6％
Mn?0.5％ P＜0.03％ S＜0.02％
All the other are the component of unavoidable impurities and Fe for Cu 9.00% RE 0.03%.
3, pickling tub high silicon iron-base alloy battery lead plate according to claim 1 and 2, it is characterized in that: it is the foundry goods of pouring into a mould through following rotten processing before the cast after the raw material melting---the molten iron after the melting is poured in the iron bag of bottom adding rare earth ferrosilicon alloy, with the rare earth ferrosilicon alloy reaction, the add-on of rare earth ferrosilicon alloy is for handling the 0.2-1.5% of weight of molten iron.
4, according to claim 1,2 described pickling tub high silicon iron-base alloy battery lead plates, it is characterized in that it has passed through following annealing thermal treatment: hot shake-out is carried out in 5-10 minute in the casting solidification that molten iron the is cast into back that is shaped, the foundry goods of red heat packed into immediately be heated in advance in the heat treatment furnace more than 650 ℃, even heating to 780 ℃-950 ℃, be incubated 2-5 hour, heat treatment furnace is as cold as below 100 ℃ and comes out of the stove.
5, pickling tub high silicon iron-base alloy battery lead plate according to claim 3, it is characterized in that it has passed through following annealing thermal treatment: hot shake-out is carried out in 5-10 minute in the casting solidification that molten iron the is cast into back that is shaped, the foundry goods of red heat packed into immediately be heated in advance in the heat treatment furnace more than 650 ℃, even heating to 780 ℃-950 ℃, be incubated 2-5 hour, heat treatment furnace is as cold as below 100 ℃ and comes out of the stove.
6, a kind of manufacture method of pickling tub high silicon iron-base alloy battery lead plate, it comprises the steps:
(1) alloy melting---adopt smelting process twice with induction furnace or electric arc furnace with acid lining, to carry out the melting first time in the pig iron, high-quality steel scrap, ferrosilicon, electrolytic copper and foundry returns adding induction furnace or the electric arc furnace, all raw materials are melt-blended evenly, pour into ingot; Again ingot is added induction furnace or electric arc furnace and carry out the melting second time, to molten iron degassing slagging-off; Add acid slag former in twice fusion process, smelting temperature is 1450 ℃-1500 ℃, after the fusing, leaves standstill the sufficiently long time to come out of the stove, and removes gas and inclusion in the alloy liquid, and tapping temperature is 1400 ℃-1450 ℃;
(2) cast form---adopt resin bonded sand mould or porous plastics vaporization die cast to be shaped; The molten iron after the melting for the second time, the pouring procedure that adopts low temperature to water soon is poured in the die cavity of resin bonded sand mould or porous plastics vaporization mould, and teeming temperature is 1300 ℃-1350 ℃; Adopt the enclosed casting system of unhurried current during cast, the ratio of the cross-sectional area of sprue, cross gate and ingate constituent element is A
Directly: A
Horizontal: A
In=1.1-1.3: 1.5-1.7: 1.0, on the cross gate constituent element of gating system, add fibrous filter net, wherein A
Directly, A
HorizontalAnd A
InBe respectively the cross-sectional area of sprue, cross gate and ingate;
(3) thermal treatment---behind the casting solidification of cast form, open mold under the red heat state, the foundry goods of red heat is directly packed into is heated to thermal treatment furnace annealing thermal treatment more than 650 ℃ in advance.
7, the manufacture method of pickling tub high silicon iron-base alloy battery lead plate according to claim 6, it is characterized in that: before pouring into a mould behind the alloy melting second time, do rotten the processing, when the chemical ingredients of molten iron reaches requirement, pour molten iron the rare earth ferrosilicon alloy of bag end adding into as alterant, molten iron and rare earth ferrosilicon alloy reaction, the add-on of alterant is for handling the 0.2-1.5% of weight of molten iron, again the molten iron after rotten the processing, be poured in the mold cavity, cast form, the thermal treatment of annealing afterwards.
8, according to the manufacture method of claim 6 or 7 described pickling tub high silicon iron-base alloy battery lead plates, it is characterized in that: when the foundry goods of red heat is directly packed thermal treatment furnace annealing thermal treatment into, even heating is to 750-950 ℃, when the furnace temperature of heat treatment furnace is in 400 ℃-100 ℃, speed of cooling is not more than 10 ℃/h, be incubated 2-5 hour, foundry goods is as cold as below 100 ℃ and comes out of the stove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100645012A CN100453708C (en) | 2004-10-16 | 2004-10-16 | High silicon content ferrous alloy electrode plate for pickling cells and method for making same |
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| CNB2004100645012A CN100453708C (en) | 2004-10-16 | 2004-10-16 | High silicon content ferrous alloy electrode plate for pickling cells and method for making same |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100523302C (en) * | 2007-04-25 | 2009-08-05 | 太原钢铁(集团)有限公司 | High-silicon cast iron battery lead plate and preparation method thereof |
| CN104018057A (en) * | 2014-06-13 | 2014-09-03 | 北京科技大学 | Ultra-low carbon ferrite high-silicon iron-based alloy and manufacturing method thereof |
| CN104043808A (en) * | 2014-06-20 | 2014-09-17 | 北京科技大学 | Copper wire mesh composite high silicon iron base alloy plate electrode and manufacturing method thereof |
| CN104057065A (en) * | 2014-06-20 | 2014-09-24 | 北京科技大学 | Reinforced composite high silicon iron-based alloy plate electrode and manufacturing method thereof |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0726240B2 (en) * | 1989-10-27 | 1995-03-22 | ペルメレック電極株式会社 | Electrolytic pickling or electrolytic degreasing method for steel sheet |
| JP3297695B2 (en) * | 1992-09-10 | 2002-07-02 | 住友金属工業株式会社 | Electrode for cathodic electrolysis in nitric acid |
| CN1029859C (en) * | 1993-08-24 | 1995-09-27 | 中国兵器工业第五二研究所 | Rare-earth stainless steel and its smelting process |
| JP3799812B2 (en) * | 1998-04-06 | 2006-07-19 | 住友金属工業株式会社 | Electrode alloys for electrolytic descaling |
| CN1291055C (en) * | 2003-12-29 | 2006-12-20 | 北京科技大学 | Process for preparing high silicon anti-corrosion cast iron |
-
2004
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100523302C (en) * | 2007-04-25 | 2009-08-05 | 太原钢铁(集团)有限公司 | High-silicon cast iron battery lead plate and preparation method thereof |
| CN104018057A (en) * | 2014-06-13 | 2014-09-03 | 北京科技大学 | Ultra-low carbon ferrite high-silicon iron-based alloy and manufacturing method thereof |
| CN104043808A (en) * | 2014-06-20 | 2014-09-17 | 北京科技大学 | Copper wire mesh composite high silicon iron base alloy plate electrode and manufacturing method thereof |
| CN104057065A (en) * | 2014-06-20 | 2014-09-24 | 北京科技大学 | Reinforced composite high silicon iron-based alloy plate electrode and manufacturing method thereof |
| CN104043808B (en) * | 2014-06-20 | 2016-04-13 | 北京科技大学 | One adds copper mesh compound high silicon iron-base alloy battery lead plate and manufacture method thereof |
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| CN100453708C (en) | 2009-01-21 |
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