CN109706398A - A kind of preparation method of silicon steel and its plate - Google Patents
A kind of preparation method of silicon steel and its plate Download PDFInfo
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- CN109706398A CN109706398A CN201910142822.6A CN201910142822A CN109706398A CN 109706398 A CN109706398 A CN 109706398A CN 201910142822 A CN201910142822 A CN 201910142822A CN 109706398 A CN109706398 A CN 109706398A
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Abstract
The present invention provides a kind of silicon steel, the chemical component of silicon steel is as follows by weight percentage: C≤0.06%, Si:2.5-3.5%, Mn≤0.25%, S≤0.02%, P≤0.02%, Al≤1.20%, remaining ingredient is Fe.A kind of preparation method of the plate of silicon steel, step 1: blank prepares: carrying out ingredient using the above chemical component, is smelted into blank；Step 2: blank treatment；Step 3: heating before forging: including low-temperature space heating and high-temperature region heating；Low-temperature space heating: by blank heating to 800 DEG C -850 DEG C, heat preservation；High-temperature region heating: by blank heating to 1250 DEG C -1270 DEG C, heat preservation；Step 4: hot forging: broadening blank and pulled out, and volume under pressure is 36%-40% in thickness direction.The hot forging that thickness direction is carried out after completing heating, can be effectively improved the problem of the degree of packing difference of blank after melting, provide mechanical performance.The short texture problem in traditional rolling silicon steel plate is overcome, while thickness is big, can be used for processing all kinds of parts, be not confined to thin plate.
Description
Technical field
The present invention relates to steel and iron manufacturing field more particularly to the preparation methods of a kind of silicon steel and its plate.
Background technique
Silicon steel has extensive use in industries such as electronics, electric power and war industrys as the functional material with specific use
On the way, production technology is complicated, manufacturing technology is stringent, is all generally by steel mill's Direct Rolling with silicon steel under nowadays sciemtifec and technical sphere
At steel plate, be then able to using.
Traditional rolling is divided into hot rolling and cold rolling, but the thickness of its plate is in 1mm hereinafter, using traditional Rolling Production
The large-scale silicon steel plate bad mechanical property of method production, the degree of packing are poor, and production method also receives significant limitation.In at this stage
More and more to the needs of all kinds of parts made of silicon steel, the requirement to its performance is also higher and higher, traditional silicon steel product and
Technique is difficult to meet the requirements.
It solves the above problems in view of a kind of existing preparation method for proposing silicon steel and its plate.
Summary of the invention
The purpose of the present invention is to provide the preparation methods of a kind of silicon steel and its plate, pass through the silicon steel melting to being newly formulated
Blank is forged, and improves its performance to realize.
The technology that the present invention uses is:
A kind of silicon steel, the chemical component of silicon steel are as follows by weight percentage: C≤0.06%, Si:2.5-3.5%, Mn≤0.25%, S
≤ 0.02%, P≤0.02%, Al≤1.20%, remaining ingredient are Fe.Formula is basic, the silicon in invention for determining material property
Steel carries out ingredient melting using said ratio.Using the silicon steel plate of this formula, the austenite grain after heat treatment is big and more, overcomes
Short texture problem in traditional rolling silicon steel plate, while thickness is big, can be used for processing all kinds of parts, not be confined to it is thin
Plate.
A kind of preparation method of the plate of silicon steel, comprises the following steps that: step 1: blank prepares: using the above chemistry
Ingredient carries out ingredient, is smelted into blank；Step 2: blank treatment: blank surface being polished, is modified, stock of square is made；
Step 3: heating before forging: including low-temperature space heating and high-temperature region heating；Low-temperature space heating: by blank heating to 800 DEG C -850 DEG C,
Heat preservation；High-temperature region heating: by blank heating to 1250 DEG C -1270 DEG C, heat preservation；Step 4: hot forging: blank being broadened and is pulled out
Long, volume under pressure is 36%-40% in thickness direction.Forging can eliminate the defects of as cast condition that metal generates in smelting process is loose,
Optimize heterogeneous microstructure, simultaneously because saving complete metal streamline, the mechanical performance of forging is generally preferred over same material
Casting.Therefore the hot forging that thickness direction is carried out after completing heating can be effectively improved the degree of packing difference of blank after melting
Problem provides mechanical performance.
As advanced optimizing for scheme, low-temperature space heats up the following steps are included: step 3-1: free power is warming up to the
One temperature spot carries out first time heat preservation；Step 3-2: being warming up to second temperature point, carries out second and keeps the temperature；Step 3-3: heating
To third temperature spot, third time heat preservation is carried out；Third temperature spot is greater than second temperature point, and second temperature point is greater than the first temperature
Point.Since silicon steel plate silicon content is high, thermal conductivity is poor, thus when the process especially low-temperature space of heating heats must slowly into
Row.
As advanced optimizing for scheme, in step 3-2 and step 3-3, heating rate is less than or equal to 80 DEG C/h, the
The soaking time of primary heat preservation, second of heat preservation and third time heat preservation is 2-4 hours.
As advanced optimizing for scheme, the first temperature spot is 200 DEG C -210 DEG C, and second temperature point is 500 DEG C -520 DEG C,
Third temperature spot is 800 DEG C -850 DEG C.
As advanced optimizing for scheme, be hot-forged the following steps are included: step 4-1: broadening: using anvil blank thickness
It is pushed on direction, volume under pressure is the 18%-20% of thickness, and blank initial forging temperature is 1250 DEG C -1270 DEG C, and final forging temperature is big
In equal to 850 DEG C；Step 4-2: pulling: heating is melted down to the blank broadened, using to anvil in the thickness side of blank
Pushed upwards, volume under pressure be thickness 18%-20%, blank initial forging temperature be 1250 DEG C -1270 DEG C, final forging temperature be greater than
Equal to 850 DEG C.
As advanced optimizing for scheme, high-temperature region heating includes the 4th heat preservation, and soaking time is more than or equal to 4 hours.
Further include step 4-3 as advanced optimizing for scheme: broadening carries out school using big flat anvil with after the completion of pulling
Flat, alignment, blank temperature are 850 DEG C -1270 DEG C, carry out melting down heating lower than 850 DEG C.
As advanced optimizing for scheme, melting down heating includes the 5th heat preservation, and soaking time is more than or equal to 3 hours.
Compared with prior art, the beneficial effects of the present invention are:
The silicon steel plate produced using the technical program, is enhanced the flexibility of forming parts, enriches the type of part, more no longer
Sheet parts are confined to, while increasing the degree of packing of part, eliminate the loose of raw material, enhance the integrated machine of part
Tool performance.
It using heating process before reasonable forge, ensure that the internal and external temperature of blank before forging is uniform, guarantee to answer in forging process
The control of power improves quality after forging.
Detailed description of the invention
Fig. 1 be the preparation method of a kind of silicon steel and its plate provided by the invention forging before heat up heating curve schematic diagram；
Fig. 2 is that the preparation method of a kind of silicon steel and its plate provided by the invention melts down heating heating curve schematic diagram.
Specific embodiment
The present invention is described in detail for each embodiment shown in reference to the accompanying drawing, but it should be stated that, these
Embodiment is not limitation of the present invention, those of ordinary skill in the art according to these embodiments made by function, method,
Or equivalent transformation or substitution in structure, all belong to the scope of protection of the present invention within.
In the description of the present embodiment, it is to be understood that term " center ", " longitudinal direction ", " transverse direction ", "upper", "lower",
The orientation or positional relationship of the instructions such as "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside" is
It is based on the orientation or positional relationship shown in the drawings, is merely for convenience of description the invention and simplifies description, rather than indicate
Or imply that signified device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore cannot understand
For the limitation to the invention.
In addition, term " first ", " second ", " third " etc. are used for description purposes only, it is not understood to indicate or imply
Relative importance or the quantity for implicitly indicating indicated technical characteristic.The feature of " first ", " second " etc. is defined as a result,
It can explicitly or implicitly include one or more of the features.In the description of the invention, unless otherwise indicated,
The meaning of " plurality " is two or more.
Term " installation ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, be also possible to removable
Connection is unloaded, or is integrally connected；It can be mechanical connection, be also possible to be electrically connected；It can be directly connected, it can also be in
Between medium be indirectly connected, can be the connection inside two elements.For the ordinary skill in the art, can pass through
Concrete condition understands concrete meaning of the above-mentioned term in the invention.
Embodiment 1:
A kind of silicon steel, the chemical component of silicon steel are as follows by weight percentage: C≤0.06%, Si:2.5-3.5%, Mn≤0.25%, S
≤ 0.02%, P≤0.02%, Al≤1.20%, remaining ingredient are Fe.
In silicon steel plus the main function of silicon is to improve resistivity, eddy-current loss, coercivity and magnetic hystersis loss is reduced, to drop
Low iron loss.When the content of silicon is less than or equal to 3.5%, the yield strength of the increase of silicone content, silicon steel is obviously mentioned with tensile strength
Height, but when silicone content is greater than 3.5, with the increase of silicon content, yield strength and tensile strength all decline rapidly, match in silicon steel
Side is mainly used on the biggish plate of thickness, the machining blanks as components, it is desirable that mechanical performance is higher, therefore controls silicone content
Higher yield strength and tensile strength are obtained, silicone content is better closer to 3.5%, but smelting technology contains each element
There are larger impact, controls to be preferred in 2.5-3.5% for amount.
And carbon is a kind of harmful element in silicon steel, phosphorus content improves, and silicon steel sheet coercivity can be made to improve, and causes iron
Damage increases, magnetism decline.Carbon still expands γ p-block element p, easily facilitates phase transformation, makes crystal grain refinement, so as to cause magnetic property deterioration.
Carbon exists in steel with non-graphitic state minimum on magnetic property influence.In view of silicon steel it is subsequent hot forging and annealing process have it is certain
Decarburization capacity, melting sample carbon content 0.04%~0.07% increase to avoid oxygen content in steel and gas flow, deteriorate the quality of steel.
Therefore phosphorus content control is preferred below 0.06%.
Phosphorus is similar to silicon, reduces the area Gang γ, promotes that the crystal grain of steel is grown up and resistance increases, to reduce iron loss,
Improve electromagnetic performance.Phosphorus content increases in steel, and magnetic strength can improve under weak and middle magnetic field.In hot-rolled low-silicon steel with phosphorus for silicon
Higher magnetoelectricity rate can be obtained.Phosphorus can improve the cold brittleness of steel, and it is difficult to make cold working, therefore for cold-rolled orientation silicon steel, phosphorus should be used as
Harmful element and remove.The plate of this formula needs that part is made by hot forging and cold working, and cold working is related to all kinds of moldings
Processing, therefore the content of phosphorus is not answered excessively high, is preferred below 0.02%.
Aluminium and silicon have similar action, so that silicon steel sheet crystal grain is grown up, promote carbon graphite and deoxidation.But aluminium content is high, shape
It is at alumina inclusion, then magnetic to deteriorate and the nozzle clogging in casting.The plate of this formula preparation wishes to obtain crystal grain relatively
Big structure, therefore aluminium content is relatively high, but no more than 1.2%, the total content for controlling silicon and aluminium is more closed 4% or so
It is suitable.
It is hot-short that sulphur not only generates steel the harmfulness of silicon steel, but also is also harmful, magnetic conductivity decline, iron loss to magnetism
It is significant to increase.Manganese can generate MnS with reaction of Salmon-Saxl, mainly play a part of to reduce sulphur in steel.When manganese content is high, silicon steel sheet will be made magnetic
It degenerates.When manganese content is in traditional silicon steel control 0.35% hereinafter, in view of in this formula sulphur 0.02% hereinafter, the content of manganese
It needs to be further decreased to 0.25% or less.
Using the silicon steel plate of this formula, the austenite grain after hot forging and heat treatment is big and more, overcomes traditional
The short texture problem in silicon steel plate is rolled, while thickness is big, can be used for processing all kinds of parts, be not confined to thin plate.
Embodiment 2:
It please refers to shown in Fig. 1 and Fig. 2, it is biggish that the present embodiment predominantly carries out thickness using the formula provided in embodiment 1
Silicon steel plate preparation.
A kind of preparation method of the plate of silicon steel, comprises the following steps that: step 1: blank prepares: using embodiment 1
In chemical component carry out ingredient, be smelted into blank；Step 2: blank treatment: blank surface being polished, is modified, the side of being made
Shape blank；Step 3: heating before forging: including low-temperature space heating and high-temperature region heating；Low-temperature space heating: by blank heating to 800
DEG C -850 DEG C, heat preservation；High-temperature region heating: by blank heating to 1250 DEG C -1270 DEG C, heat preservation；Step 4: hot forging: blank being carried out
It broadens and pulls out, volume under pressure is 36%-40% in thickness direction.
In the prior art, the product based on silicon steel substantially only has the shape of continuous casting billet and silicon steel sheet (thickness is less than 1mm)
Formula, the mode of production are hot rolling or cold rolling, lie substantially in sky on the field of the biggish silicon steel plate of production thickness or part
The white stage.Based on the needs to such product, the present invention provides a kind of to carry out sheet fabrication in the way of high temperature forging, comes
So that the structure of the blank after melting is even closer, its mechanical performance is improved.
Traditional thin silicon steel plate directly rolls blank after melting, causes its performance bad, application field is narrow.?
It is proposed in the present invention by forging and improves the performance of silicon steel plate, improve compactness.In the present embodiment, before blank forging first
Heat temperature raising is carried out using gas furnace, makes it suitable for being hot-forged；Wherein in temperature-rise period, risen by the way of multistage heat preservation
Temperature to hot forging needs minimum 800 DEG C, and guaranteeing blank using multistage heating, inside and outside temperature is uniform, reduces thermal stress, guarantees forging
Uniform stressed deforms during making, and reduces the residual of stress.The as cast condition that metal generates in smelting process can be eliminated by forging simultaneously
The defects of loose, optimizes heterogeneous microstructure, simultaneously because saving complete metal streamline, the mechanical performance of forging is generally excellent
In the casting of same material.Therefore the hot forging that thickness direction is carried out after completing heating can be effectively improved blank after melting
The problem of degree of packing difference, provides mechanical performance.
In forging equipment in the present embodiment, is broadened and pulled out with anvil using hydraulic press, due in width side
It is more advantageous to progress than jumping-up on length direction upwards, considers to broaden first when forging the first fire, is then carried out in the second fire
Pulling, finishing and smoothing.
As advanced optimizing for scheme, low-temperature space heats up the following steps are included: step 3-1: free power is warming up to the
One temperature spot carries out first time heat preservation；Step 3-2: being warming up to second temperature point, carries out second and keeps the temperature；Step 3-3: heating
To third temperature spot, third time heat preservation is carried out；Third temperature spot is greater than second temperature point, and second temperature point is greater than the first temperature
Point.In step 3-2 and step 3-3, heating rate is less than or equal to 80 DEG C/h, heat preservation for the first time, second of heat preservation and third time
The soaking time of heat preservation is 2-4 hours.Since silicon steel plate silicon content is high, thermal conductivity is poor, thus heating process especially
Low-temperature space must be carried out slowly when heating.
When formulating heating and subsequent heat treatment technique, the heating conduction due to considering silicon steel is poor, according to the specific of blank
Size in order to reduce internal stress when heating, therefore takes stepped heating means, in low-temperature space using heat preservation and≤80
DEG C/h heating speed, it is provided to reduce internal stress in the region of material plastic area difference.Practice production proves that the heating process is protected
The forging quality of product is demonstrate,proved.If using bigger heating speed during heating, the generation of heating crackle may cause.
In heating before forging, high-temperature time cannot be too long, and overlong time is easy to cause grain growth excessive, mechanicalness
Can be bad, high-temperature time is too short, inside and outside there is the temperature difference, there are stress, therefore Grain size controlling soaking time and heating rate, it is to protect
Demonstrate,prove the key of forging quality.Therefore, it when high-temperature region is heated up, is heated using the maximum common ratio of heating equipment, heating speed
Faster, the degree of superheat is bigger, and austenite is actually formed that temperature is higher, and the increase of nucleation rate is greater than coarsening rate, makes austenite crystal
Grain is of moderate size.The temperature of the preceding blank of forging is uniform when being come again by heat preservation in short-term.
As advanced optimizing for scheme, the first temperature spot is 200 DEG C -210 DEG C, and second temperature point is 500 DEG C -520 DEG C,
Third temperature spot is 800 DEG C -850 DEG C.The transformation temperature of steel at 800 DEG C needs quick high-temp liter after 800 DEG C of completions are kept the temperature
Temperature.
As advanced optimizing for scheme, be hot-forged the following steps are included: step 4-1: broadening: using anvil blank thickness
It is pushed on direction, volume under pressure is the 18%-20% of thickness, and blank initial forging temperature is 1250 DEG C -1270 DEG C, and final forging temperature is big
In equal to 850 DEG C；Step 4-2: pulling: heating is melted down to the blank broadened, using to anvil in the thickness side of blank
Pushed upwards, volume under pressure be thickness 18%-20%, blank initial forging temperature be 1250 DEG C -1270 DEG C, final forging temperature be greater than
Equal to 850 DEG C.
The forging technology is pushed twice, and pressure measures the 20% of thickness every time, is selected in this way first is that thick every time
The drafts of degree 20% has been just met for the size requirement of forging, it is often more important that 20% or so drafts ensure that forging every time
Forging permeability, guarantee loose elimination in raw material, ensure that the degree of packing of forging.
If bigger drafts is taken to be unfavorable for the guarantee of forging's block dimension first, secondly bigger drafts can be produced more
Big processing hardening and the generation for causing forging crack；If taking light reduction, forging cannot be made sufficiently to forge thoroughly, inside is dredged
Pine is also unable to get elimination.
As advanced optimizing for scheme, high-temperature region heating includes the 4th heat preservation, and soaking time is more than or equal to 4 hours.
Ensure temperature uniformity using 6 hours soaking times in embodiment.
Further include step 4-3 as advanced optimizing for scheme: broadening carries out school using big flat anvil with after the completion of pulling
Flat, alignment, blank temperature are 850 DEG C -1270 DEG C, carry out melting down heating lower than 850 DEG C.If temperature is low after completing pulling
In final forging temperature, need to melt down heating, the operations such as the subsequent finishing of ability memory, smoothing alignment.
As advanced optimizing for scheme, melting down heating includes the 5th heat preservation, and soaking time is more than or equal to 3 hours.By
The first fire heating is had already passed through in blank, is first reduced when blank cools down for external temperature, therefore soaking time is not needed as first
Fire is so long.
The following are a practical operation processes of forging, such as billet size before the forging in embodiment are as follows: 2100mm*
1160mm*220mm。
First fire, i.e., blank is begun to warm up from room temperature, (for broadening): (length is constant) blank by above-mentioned heating curves into
Row is come out of the stove after being less than or equal to 1260 DEG C of heat preservations, and forging starts, and clamps blank in thickness direction with hydraulic operation machine, forging is used
Hammering block selects 1500mm*400mm to anvil, in order to prevent oxide skin insertion forging identical as charge length direction to anvil length direction
In part ontology, first light pressure blank surface, removes descale, and scale removal prevents the impurity after oxidation to be compacted inside, influences
Then overall performance clamps a contrary middle part in the operation vehicle jaw of blank with full anvil and separately forges, drafts is about
It for 45mm, then is successively carried out to both sides, then turns around to continue to forge and press in residue length part, the effective ruler of forging after the first fire
It is very little are as follows: 2100mm*1370mm*175mm.Then forging stock enters heating furnace and is heated.
Second fire, that is, the heating again after having already passed through the first fire heating, for pulling out, (width is constant) will rotate anvil
90 degree, make it is vertical with charge length direction to anvil length direction, in the middle part of the blank pull out, drafts is about 35mm, forging
Mode with first fire, until forging effective dimensions be 2500mm*1370mm*140mm when, by the lower anvil of anvil change into big flat anvil into
Row is relatively flat, relatively straight.
By above-mentioned forging, blank is carried out to the pushing of 36%-40% in a thickness direction, has provided the close of silicon steel plate
Degree improves mechanical performance.Before forging, continuous casting billet sampling is machined, occurs macroscopic view on the machined surface of different depth
Rarefaction defect.It samples and is machined on forging after forging, have no gross imperfection.Make after being machined to entire forging
Color flaw detection, no defects are shown.From the point of view of the comparison of front and back, forging increases the degree of packing of part, eliminates the loose of material.
For this forging technology by being pushed twice on the thickness direction of blank, the direction of anvil carries out vertical twice hand over
It changes, keeps its structure even closer, traditional hot rolling is difficult to carry out the silicon steel plate processing that thickness is more than 100mm, using this preparation side
Method can obtain the excellent thick silicon steel plate of mechanical performance.
Silicon steel plate after completing forging, after external mechanical presses and Temperature fall, there are certain stress, crystal grain for inside
Growth size is not uniform enough, although performance is more obvious than the silicon steel plate performance improvement of traditional rolling, there is also what can be promoted
Space.
By the way that the silicon steel plate after forging to be heat-treated, that is, anneals, the Ovshinsky of internal grain can be effectively improved
Body and elimination thermal stress, annealing heating curve in this embodiment is similar with preceding heating curve is forged, using the multistage of low-temperature space
Heating and heat preservation so that the internal and external temperature of silicon steel plate is uniform, the heating rate of low-temperature space (less than 800 DEG C) be less than or equal to 80 DEG C/
Hour, it when rising to annealing temperature for 800 DEG C, is heated using free power, carries out by equipment maximum power, dropped after the completion of heat preservation
Warm rate control is being less than or equal to 60 DEG C/h.The silicon steel plate for completing annealing eliminates the stress that forging generates, internal grain
Growth is of moderate size, and grows uniformly, effectively overcomes the problem of the performance deficiency in existing silicon steel product.
The series of detailed descriptions listed above only for feasible embodiment of the invention specifically
Protection scope bright, that they are not intended to limit the invention, it is all without departing from equivalent implementations made by technical spirit of the present invention
Or change should all be included in the protection scope of the present invention.
It is obvious to a person skilled in the art that invention is not limited to the details of the above exemplary embodiments, Er Qie
In the case where without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power
Benefit requires rather than above description limits, it is intended that all by what is fallen within the meaning and scope of the equivalent elements of the claims
Variation is included within the present invention.Any reference signs in the claims should not be construed as limiting the involved claims.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
The other embodiments being understood that.
Claims (9)
1. a kind of silicon steel, which is characterized in that the chemical component of the silicon steel is as follows by weight percentage: C≤0.06%, Si:
2.5-3.5%, Mn≤0.25%, S≤0.02%, P≤0.02%, Al≤1.20%, remaining ingredient are Fe.
2. a kind of preparation method of the plate using silicon steel as claimed in claim 1, which is characterized in that comprise the following steps that:
Step 1: blank prepares: carrying out ingredient using chemical component in such as claim 1, is smelted into blank；
Step 2: blank treatment: blank surface being polished, is modified, stock of square is made；
Step 3: heating before forging: including low-temperature space heating and high-temperature region heating；Low-temperature space heating: by blank heating to 800 DEG C-
850 DEG C, heat preservation；High-temperature region heating: by blank heating to 1250 DEG C -1270 DEG C, heat preservation；
Step 4: hot forging: broadening blank and pulled out, and volume under pressure is 36%-40% in thickness direction.
3. the preparation method of plate according to claim 2, which is characterized in that low-temperature space heating the following steps are included:
Step 3-1: free power is warming up to the first temperature spot, carries out first time heat preservation；
Step 3-2: being warming up to second temperature point, carries out second and keeps the temperature；
Step 3-3: being warming up to third temperature spot, carries out third time heat preservation；The third temperature spot is greater than the second temperature point,
The second temperature point is greater than first temperature spot.
4. the preparation method of plate according to claim 3, which is characterized in that in the step 3-2 and step 3-3, rise
Warm speed is less than or equal to 80 DEG C/h, and the soaking time of the first time heat preservation, second of heat preservation and third time heat preservation is 2-4
Hour.
5. the preparation method of plate according to claim 4, which is characterized in that first temperature spot is 200 DEG C -210
DEG C, the second temperature point is 500 DEG C -520 DEG C, and the third temperature spot is 800 DEG C -850 DEG C.
6. the preparation method of plate according to claim 5, which is characterized in that it is described hot forging the following steps are included:
Step 4-1: broadening: being pushed on the thickness direction of blank using anvil, and volume under pressure is the 18%-20% of thickness, blank
Initial forging temperature is 1250 DEG C -1270 DEG C, and final forging temperature is more than or equal to 850 DEG C；
Step 4-2: pulling: heating is melted down to the blank broadened, is carried out on the thickness direction of blank using to anvil
It pushes, volume under pressure is the 18%-20% of thickness, and blank initial forging temperature is 1250 DEG C -1270 DEG C, and final forging temperature is more than or equal to 850
℃。
7. the preparation method of the plate according to one of claim 2-6, which is characterized in that high-temperature region heating includes the
Four heat preservations, soaking time are more than or equal to 4 hours.
8. the preparation method of plate according to claim 6, which is characterized in that further include step 4-3: broadening and pulled out
Cheng Hou is smoothed using big flat anvil, is straightened, and blank temperature is 850 DEG C -1270 DEG C, carries out melting down liter lower than 850 DEG C
Temperature.
9. the preparation method of the plate according to claim 6 or 8, which is characterized in that described to melt down heating including the 5th time
Heat preservation, soaking time are more than or equal to 3 hours.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110527796A (en) * | 2019-08-26 | 2019-12-03 | 张家港广大特材股份有限公司 | A method of passing through Heat Treatment Control high temperature alloy forging grain size |
| CN115194065A (en) * | 2022-06-27 | 2022-10-18 | 中国航发北京航空材料研究院 | Forging process of thermal expansion sensitive and low-plasticity Ti-Al-Nb alloy |
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