CN1754968A - Method for producing Fe-Ni based alloy thin plate - Google Patents
Method for producing Fe-Ni based alloy thin plate Download PDFInfo
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- CN1754968A CN1754968A CNA2005101041851A CN200510104185A CN1754968A CN 1754968 A CN1754968 A CN 1754968A CN A2005101041851 A CNA2005101041851 A CN A2005101041851A CN 200510104185 A CN200510104185 A CN 200510104185A CN 1754968 A CN1754968 A CN 1754968A
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- thin plate
- rip cutting
- annealing
- destressing
- based alloy
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0236—Cold rolling
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
- C21D1/30—Stress-relieving
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/08—Ferrous alloys, e.g. steel alloys containing nickel
Abstract
To provide a method for producing an Fe-Ni based alloy thin sheet which can solve the problem particularly on heating shrinkage, can realize excellent flatness even in the case of a wide width of >=60 mm for example, and is used as the stock for a lead frame, the stock for a lead or the like. In the method for producing an Fe-Ni based alloy thin sheet, after final cold rolling, straightening by a leveler is performed, stress relieving annealing by a continuous annealing furnace is performed subsequently to the straightening by the leveler, and thereafter, thread coiling-slit processing is performed. Preferably, the stress relieving annealing by the continuous annealing furnace is performed at a furnace tension of <=20 N/mm<SP>2</SP>, and, more preferably, the stress relieving annealing is performed at 400 to 750[deg.]C.
Description
Technical field
The present invention relates to be used to make the method for Fe-Ni based alloy thin plate (strip), described light sheet is used for lead frame material, lead material etc.
Background technology
Up to now, the several different methods that is used to make the lead frame of being made by Fe-Ni sheet material is disclosed.Wherein, the document that concentrates on thermal contraction and unrelieved stress comprises for example JP-A-05-109960 and JP-A-06-145811.
The manufacture method that comprises the steps is disclosed among the JP-A-05-109960:
(1) make iron nickel alloy or the cold rolling one-tenth of iron-nickel-cobalt alloy have the thin plate of products thickness (product thickness);
(2) then, the thin plate rip cutting is become to have the sheet material of goods width (product width); With
(3) then, these sheet materials were annealed under 600～700 ℃ temperature 1～3 minute, to remove the stress that causes owing to rip cutting, simultaneously with 5kg/mm
2Or lower, preferred 2kg/mm
2Or lower tension force applies on it.
On the other hand, JP-A-06-145811 discloses the manufacture method that comprises the steps:
(1) thin plate is rolled, processes (finishing) at last;
(2) then, its rip cutting is become sheet material;
(3) then, under the temperature in 630～700 ℃ of scopes these sheet materials are fully annealed, to remove the stress that causes owing to rip cutting; With
(4) subsequently, these sheet materials are aligned with levelling machine,
This is opposite with the following technology that adopts before this:
(1) hot rolling iron nickel alloy plate;
(2) cold rolling then this thin plate;
(3) then once, so that it is softening with its annealing;
(4) then with 50% or lower compression speed (reduction rate) be rolled, process at last;
(5) then, with its shearing (rip cutting), has the sheet material of preset width with manufacturing; With
(6) subsequently, these sheet materials are annealed under 600 ℃ or lower temperature, to remove because the stress that rip cutting causes.
Summary of the invention
As mentioned above, the conventional method of using is that the steel board with goods width is annealed, to remove the stress that causes owing to rip cutting.These manufacture method have following point.
The technical concept of classical production process is to want to reduce because rip cutting and the cold rolling stress that causes by the thermal treatment as last process.Yet when heat-treating after sheet material is become the goods width by rip cutting, stress relief can produce corrugated distortion, causes the sheet material planarization to descend.
In addition, when the material plate after a plurality of rip cuttings are become the goods width is heat-treated simultaneously, the tension force difference between these sheet materials, thereby be difficult to stably control these sheet material.In addition, because sheet material crooked (meander) in stove, so sheet deformation and damage are inevitable.When these sheet materials are heat-treated one by one, can not cause tension control and crooked problem, but productivity reduces obviously.
Therefore, although can reduce because the stress that rip cutting causes by thermal treatment, but be can not obtain the required steady heat of lead frame material to shrink and planarization with sheet material annealing with the poorest shortcoming of the classical production process of removing destressing after rip cutting, described steady heat is shunk by stable tension control and is caused.
In JP-A-06-145811,, align with levelling machine subsequently in order to ensure planarization.Yet, as mentioned above, can not stably control thermal contraction.In addition, by using the crushed element of levelling machine aligning in thermal treatment, in rip cutting becomes the steel band of goods width, produce local unrelieved stress, may after punching press that is used to make lead frame or etching, cause lead deformation like this.
For example, when sheet material had about 30mm or lower conventional narrow width, although some fluctuatings are arranged, this sheet material also can be used in for example lead frame material.Yet because the sheet material width need be widened owing to the ICs efficient that increases recently, its width is 60mm or bigger, thereby the needs of planarization are become strict more.Therefore, adopt classical production process to be very difficult to guarantee planarization.
An object of the present invention is to provide a kind of method that is used to make Fe-Ni based alloy thin plate, described light sheet is used for lead frame material, lead material etc., even for for example 60mm or bigger width, this method also can solve the problem of thermal contraction especially, and obtains excellent planarization.
The present invention provides in view of the above problems.
The invention provides a kind of method that is used to make Fe-Ni based alloy thin plate, wherein this method comprises: the thin plate of aligning last cold rolling mistake by levelling machine; Should align thin plate then and in continuous annealing furnace, anneal, to remove the stress of this aligning thin plate; Then, this thin plate rip cutting is become sheet material.
Preferably, when in continuous annealing furnace with thin plate annealing when removing destressing, will be not more than 20N/mm
2Tension force be applied on the thin plate.
More preferably, will anneal under the temperature of thin plate in 400～750 ℃ of scopes, to remove destressing.
And, in the present invention, preferably using crew-served a pair of up and down disc cutter rip cutting thin plate, the diameter of described each disc cutter is all by 750 times of the Fe-Ni plate thickness of rip cutting or bigger.
More preferably, become in the sheet material process in rip cutting, the lap of disc cutter is by 5～50% of the Fe-Ni plate thickness of rip cutting up and down.
Constitute Fe-Ni among the present invention preferred composition be to be not more than 0.1% carbon, to be not more than 1.0% silicon, to be not more than 1.2% manganese, 30～50% nickel, all the other are essentially iron, these are formed all by percentage to the quality.
By using manufacture method of the present invention, more definitely can solve the thermal contraction problem, and can obtain to have the Fe-Ni based alloy thin plate of excellent planarization.Therefore, can be easy to obtain to be used for the Fe-Ni based alloy thin plate of lead frame material, lead material etc., and will carry out little processing (micro-fabricating) to described sheet material inevitably.
To describe some restrictions that limit among the present invention below in detail.
According to the present invention, in order to ensure the planarization of light sheet, the thin plate of last cold rolling mistake is aligned with levelling machine, become straight with the Fe-Ni based alloy thin plate that is used in lead frame material, lead material etc., subsequently thin plate is annealed in continuous annealing furnace, to remove the stress of thin plate.
" levelling machine " of indication is that certain tension stress is applied on the whole width of the steel plate in being in vertically herein, to eliminate the device of the difference in length in the sheet material.Consider the thickness of Fe-Ni based alloy thin plate, the actual in the present invention levelling machine predetermined tension levelling machine that uses.Also can use and be used for crooked and tensile combination levelling machine.This tension force can be at 50～500N/mm
2Scope.
According to the present invention, can in continuous annealing furnace, anneal for example having the Fe-Ni plate of 300～1200mm width, to remove destressing, this is because alloy sheets is to carry out annealed before the sheet material that is become to have the goods width by rip cutting.Therefore, have only the thin plate own wt to be carried on the whole width of Fe-Ni plate, compare by the situation in the stove simultaneously, can be easy to control tension force like this with a plurality of steel bands with narrow width.
Therefore, can suppress the conventional localized variation of thermal contraction in the Fe-Ni based mixture plate, thereby obtain the steady heat contraction.In addition, compare by the situation in the stove simultaneously, also can be easy to the bending of control material, thereby also can eliminate the possibility of sheet deformation and damage with a plurality of Fe-Ni based alloy thin plates.
Although typical continuous annealing furnace can be horizontal or vertical among the present invention, in these two kinds of stoves, can both control tension force, with the advantage that realizes boosting productivity.
Especially, when to use its light plate vertically be vertical vertical continuous annealing furnace, can suppress the lax of steel plate, thereby obtain more stable thermal contraction.
When with thin plate annealing when removing destressing, preferably in stove, apply and be no more than 20N/mm to this thin plate
2Tension force.If tension force is in this scope, then in the intermediate heat treatment process of in the pressurization punching press, carrying out or the thermal contraction that in the package semiconductor manufacturing processed, produces can be minimized, thereby more can prevent because size changes the defective that causes.
If the tension force in the stove is greater than 20N/mm
2, then when middle thermal treatment was for example carried out in the pressurization punching press, thermal contraction increased, thereby is easy to occur owing to size changes the defective that causes.Therefore, the tension force in the stove is limited in is not more than 20N/mm
2
On the other hand, tension force lower limit change degree depends on that employed continuous annealing furnace is vertical or level.For example, when using vertical furnace, thin plate can be annealed under the tensile situation not having, and this is not hang down because it can not need to apply extra tension force by himself weight.Yet in view of the stability of processing, the lower limit of vertical furnace and horizontal stove can be 0.5N/mm
2, and in order to obtain above-mentioned effect more definitely, preferred 1～15N/mm
2Tension force in the scope.
The preferred above-mentioned annealing that is used for removing destressing is to carry out under the temperature in 400～750 ℃ of scopes.
In this temperature range, can obtain the stress relaxation effect of in cold rolling and aligning, introducing.Preferred temperature range is 500～700 ℃.Although annealing time is not specifically limited herein, annealing time can be 10～120 seconds.
In addition, this annealing can be in-70～-5 ℃ the reducing atmosphere or carry out in rare gas element such as nitrogen at dew point.The selection of this atmosphere can be depending on the needed character of thin plate.For example, be important if at first improve erosion resistance, then annealing is more favourable in rare gas element, and when annealing in reducing atmosphere, can at first provide the effect that prevents that thin sheet surface is oxidized.
According to the present invention, for removing after destressing carries out aforesaid annealing, with thin plate rip cutting precedent as having the sheet material of goods width.
In the present invention, because planarization was improved before rip cutting becomes sheet material with thermal contraction, therefore in that being become in the sheet material, the thin plate rip cutting do not suit to the excessive stress application of thin plate.Can use any method that the thin plate rip cutting is become to contain the sheet material of little stress, for example by the laser beam method for processing, be easily but thin plate is carried out rip cutting with crew-served a pair of disc cutter up and down.
Each all preferred its diameter that is used for the disc cutter up and down of rip cutting is 750 times of the Fe-Ni plate thickness or bigger.This be because if the diameter of cutting knife less than 750 times of sheet gauge, then the angle of shear can become greatly, thereby unrelieved stress increases in rip cutting becomes the process of sheet material.
Therefore, in the present invention, because the stress that rip cutting causes, the disc cutter diameter is 750 times of the Fe-Ni plate thickness or bigger up and down, is preferably 900 times in order significantly to reduce.
In addition, the lap of disc cutter can be 5～50% of a sheet gauge up and down, the stress that causes with further reduction rip cutting.If lap increases, then the angle of shear becomes big, thereby the unrelieved stress that rip cutting causes increases.If lap is too little, then cutting knife can not cut thin plate fully, causes the otch defective.
" Fe-Ni " of indication expression herein contains as the iron of principal element and the alloy of nickel.Typical form be as the nickel that contains 27～52 quality %, all the other be the alloy of iron substantially, also comprise the alloy that is not more than 7% chromium, perhaps usefulness is not more than the alloy that 20% cobalt replaces above-mentioned nickel.
Wherein, the alloy that preferably constitutes by iron and nickel basically.The wherein preferable range and the reason thereof of containing element are described below.
Carbon: be no more than 0.1%
Carbon is the element that infringement can be carried out the etching character of etched Fe-Ni based alloy thin plate.Therefore, the upper limit of carbon is defined as and is no more than 0.1%.The preferred upper limit of carbon is 0.03%.
Silicon: be no more than 1.0%, and manganese: be no more than 1.2%
For the deoxidation purpose, include the silicon and the manganese of trace in the Fe-Ni.If the excessive adding of these elements, then they may be separated.Therefore, silicon is defined as is no more than 1.0%, and manganese is defined as and is no more than 1.2%.
Nickel: 30～50%
When Fe-Ni based alloy thin plate during as lead frame for example, because nickel plays a part to regulate thermal expansivity, thereby it is the element of remarkably influenced low-thermal-expansion character.If the amount of nickel is lower than 30% or be higher than 50%, the effect of thermal expansivity can not appear reducing.
All the other are essentially iron.
Though all the other are iron basically except that above-mentioned element, it is inevitable including impurity in the material in the mill.In addition,, can contain 0.005～0.020% element such as the sulphur that is used to improve free-cutting machinability matter, perhaps can contain 0.0005～0.0050% elements, such as boron that is used to improve hot-work character in order to improve compressing and stamping performance matter.
Description of drawings
Figure 1A is depicted as the schematic top view of explaining the method be used to measure stress that rip cutting causes.
Figure 1B is depicted as the schematic side elevation of explaining the method be used to measure stress that rip cutting causes.
Embodiment
The present invention will be described in detail with the following examples.
Be used for cold rolling Fe-Ni plate by vacuum fusion, forging and hot rolling manufacturing, this alloy sheets is used for lead frame.Then, the Fe-Ni plate being repeated annealing and cold rolling in reducing atmosphere, is that 0.125mm and width are the Fe-Ni thin plate of 700mm to produce thickness.Annealing temperature is 950 ℃, and final cold rolling compression ratio is 25%.The tension range that applies of the tension level(l)er that uses is 200～400N/mm
2
Then, by the inventive method and traditional method, be used for the Fe-Ni based alloy thin plate of lead frame material by the manufacturing of this Fe-Ni plate.Each piece thin plate all uses crew-served a pair of disc cutter rip cutting up and down to become sheet material.All kerf widths of these sheet materials all are 100mm.
In comparing embodiment, after the thin plate rip cutting, light sheet is being annealed.In technology numbering 7 and numbering 8, three sheet materials are annealed simultaneously, removing destressing, and in technology numbering 9, sheet material is to carry out annealed one by one.
Table 1 is depicted as chemical constitution, and table 2 is depicted as creates conditions.
Table 1
(quality %)
| C | Si | Mn | Ni | S | All the other |
| 0.007 | 0.11 | 0.45 | 40.89 | 0.003 | Iron and unavoidable impurities |
Table 2
| Numbering | Technology | Annealing conditions | The rip cutting condition | ||||||
| Temperature (℃) | Time (second) | Gas ( *) | Tension force (N/mm 2) | Stove ( **) | Cutting knife diameter (mm) | Lap; Ratio (%) with sheet gauge | |||
| The inventive method | 1 | Cold rolling at last → tension level(l)er → annealing is to remove destressing → rip cutting | 600 | 30 | H 2 | 1.5 | Vertically | 250 | 15 |
| 2 | Cold rolling at last → tension level(l)er → annealing is to remove destressing → rip cutting | 520 | 45 | N 2 | 11.4 | Level | 190 | 10 | |
| 3 | Cold rolling at last → tension level(l)er → annealing is to remove destressing → rip cutting | 650 | 25 | AX | 15.7 | Vertically | 250 | 25 | |
| 4 | Cold rolling at last → tension level(l)er → annealing is to remove destressing → rip cutting | 670 | 30 | AX | 1.5 | Vertically | 120 | 7 | |
| The inventive method | 5 | Cold rolling at last → tension level(l)er → annealing is to remove destressing → rip cutting | 580 | 60 | AX | 2.5 | Vertically | 190 | 35 |
| 6 | Cold rolling at last → tension level(l)er → annealing is to remove destressing → rip cutting | 480 | 75 | N 2 | 11.4 | Level | 120 | 20 | |
| Comparing embodiment | 7 | Cold rolling at last → rip cutting → annealing is to remove destressing → levelling machine | 600 | 20 | AX | 29.4 | Level | 80 | 20 |
| 8 | Cold rolling at last → rip cutting → annealing is to remove destressing | 620 | 30 | AX | 19.6 | Level | 80 | 50 | |
| 9 | Cold rolling at last → rip cutting → annealing is to remove destressing | 650 | 30 | AX | 17.6 | Level | 80 | 35 |
*) gas symbol H
2: pure hydrogen, N
2: pure nitrogen gas, AX:75%H
2+ 25%N
2
*) carry out in continuous annealing furnace in order to the annealing that removes destressing.
After the rip cutting, the Fe-Ni based alloy thin plate of making down that is used for lead frame material is measured its thermal shrinking quantity for creating conditions at each.
In the mensuration of thermal shrinking quantity, in each sample, mark graticule.Distance between two graticules on the rolling direction is 180mm, and this distance is to use instrument manufactory measurement microscope.With sample after 650 ℃ of heating (in hydrogen) 10 minutes, reusing instrument manufactory measurement microscope should distance, to determine shrinkage.With shrinkage divided by the distance between the graticule before the heating and multiply by 100, with the expression assessed value.
Shown in Figure 1A and 1B, at the otch 4 that on the position of the notching edge 2A of the Fe-Ni based alloy thin plate 1 that is used for lead frame material and 2B 1.5mm distance, cuts long 150mm with wiring clip, sheet material 1 after will cutting then is placed on the platform 3, use graduated scale to measure the vertical lift-off value R of notching edge 2A and 2B, thereby determine by the caused amount of stress of rip cutting.
In order to measure planarization, after sample is cut 500mm in the longitudinal direction, place it on the platform, use laser distance sensor to measure maximum lift-off value (in millimeter).
Each of mensuration rip cutting goes out from each piece thin plate six Fe-Ni based alloy thin plates that are used for lead frame material.Table 3 illustrates measurement result.
Table 3
| Numbering | Technology | Product performance | |||||
| Thermal shrinking quantity (%) | Amount of stress (mm) | Planarization (mm) | |||||
| Edge A (2A) | Edge B (2B) | ||||||
| The inventive method | 1 | Cold rolling at last → tension level(l)er → annealing is to remove destressing → rip cutting | 1 | 0.021 | 4 | 8 | 0.08 |
| 2 | 0.021 | 7 | 4 | 0.08 | |||
| 3 | 0.020 | 8 | 3 | 0.10 | |||
| 4 | 0.022 | 4 | 5 | 0.09 | |||
| 5 | 0.021 | 9 | 7 | 0.06 | |||
| 6 | 0.024 | 4 | 6 | 0.09 | |||
| 2 | Cold rolling at last → tension level(l)er → annealing is to remove destressing → rip cutting | 1 | 0.027 | 8 | 10 | 0.07 | |
| 2 | 0.027 | 5 | 4 | 0.06 | |||
| 3 | 0.028 | 9 | 8 | 0.08 | |||
| 4 | 0.030 | 11 | 4 | 0.10 | |||
| 5 | 0.029 | 9 | 7 | 0.07 | |||
| 6 | 0.029 | 6 | 8 | 0.08 | |||
| 3 | Cold rolling at last → tension level(l)er → annealing is to remove destressing → rip cutting | 1 | 0.025 | 3 | 6 | 0.10 | |
| 2 | 0.022 | 8 | 7 | 0.12 | |||
| 3 | 0.024 | 2 | 8 | 0.15 | |||
| 4 | 0.025 | 7 | 9 | 0.11 | |||
| 5 | 0.020 | 5 | 4 | 0.10 | |||
| 6 | 0.021 | 7 | 8 | 0.12 | |||
-continue-
| The inventive method | 4 | Cold rolling at last → tension level(l)er → annealing is to remove destressing → rip cutting | 1 | 0.011 | 9 | 12 | 0.15 |
| 2 | 0.009 | 14 | 6 | 0.17 | |||
| 3 | 0.012 | 7 | 10 | 0.12 | |||
| 4 | 0.012 | 11 | 8 | 0.15 | |||
| 5 | 0.009 | 8 | 6 | 0.16 | |||
| 6 | 0.011 | 11 | 5 | 0.14 | |||
| 5 | Cold rolling at last → tension level(l)er → annealing is to remove destressing → rip cutting | 1 | 0.015 | 10 | 10 | 0.12 | |
| 2 | 0.015 | 7 | 9 | 0.12 | |||
| 3 | 0.016 | 11 | 8 | 0.14 | |||
| 4 | 0.016 | 10 | 4 | 0.10 | |||
| 5 | 0.014 | 7 | 12 | 0.14 | |||
| 6 | 0.013 | 5 | 9 | 0.15 | |||
| 6 | Cold rolling at last → tension level(l)er → annealing is to remove destressing → rip cutting | 1 | 0.027 | 11 | 15 | 0.06 | |
| 2 | 0.029 | 12 | 7 | 0.08 | |||
| 3 | 0.030 | 5 | 8 | 0.10 | |||
| 4 | 0.030 | 9 | 14 | 0.08 | |||
| 5 | 0.028 | 13 | 9 | 0.09 | |||
| 6 | 0.028 | 12 | 10 | 0.10 | |||
| Comparing embodiment | 7 | Cold rolling at last → rip cutting → annealing is to remove destressing → levelling machine | 1 | 0.043 | 20 | 23 | 0.29 |
| 2 | 0.041 | 25 | 20 | 0.31 | |||
| 3 | 0.045 | 27 | 22 | 0.27 | |||
| 4 | 0.048 | 18 | 27 | 0.29 | |||
| 5 | 0.039 | 20 | 24 | 0.35 | |||
| 6 | 0.049 | 25 | 19 | 0.27 |
-continue-
| Comparing embodiment | 8 | Cold rolling at last → rip cutting → annealing is to remove destressing | 1 | 0.030 | 24 | 29 | 0.37 |
| 2 | 0.035 | 28 | 23 | 0.39 | |||
| 3 | 0.028 | 27 | 21 | 0.40 | |||
| 4 | 0.029 | 22 | 28 | 0.41 | |||
| 5 | 0.030 | 24 | 25 | 0.38 | |||
| 6 | 0.027 | 26 | 24 | 0.47 | |||
| 9 | Cold rolling at last → rip cutting → annealing is to remove destressing | 1 | 0.027 | 23 | 27 | 0.48 | |
| 2 | 0.028 | 24 | 22 | 0.50 | |||
| 3 | 0.030 | 20 | 25 | 0.52 | |||
| 4 | 0.028 | 27 | 28 | 0.48 | |||
| 5 | 0.033 | 27 | 20 | 0.47 | |||
| 6 | 0.029 | 24 | 27 | 0.58 |
As shown in table 3, have according to the Fe-Ni based alloy thin plate that is used for lead frame material of the inventive method manufacturing and to be not more than 0.03% little thermal shrinking quantity.
Anneal after rip cutting to remove in the comparing embodiment of destressing, the shrinkage in the technology numbering 7 is big.This is because applied high tension force in removing the annealing of destressing, and levelling machine has been introduced other stress again.
In technology numbering 8, the thermal shrinking quantity of some samples is not more than 0.03%, but deviation is big between criticizing.This is because when a plurality of sheet materials pass through in stove simultaneously, can not independent control tensile cause for each sheet material.
In technology numbering 9, deviation is less relatively between batch, and this is because sheet material passes through in removing the annealing of destressing one by one.Yet,, therefore discharge the planarization variation that stress causes sheet material because sheet material is annealed to remove destressing after rip cutting.
In measuring the stress caused by rip cutting, the Fe-Ni based alloy thin plate of making under rip cutting condition of the present invention that is used for lead frame material has and is not more than the little of the caused amount of stress of rip cutting of 15mm.
About planarization, according to the inventive method, reached the planarization that is not more than 0.2mm, and in comparing embodiment, produced the lift-off value of 0.27～0.58mm for the 100mm width.This is because when the stress in each light sheet discharges by the thermal treatment after the rip cutting, do not have environment constraint (constresst), thereby the easy waviness of light sheet.Especially, be under the 100mm situation at wide material such as width, can see significant planarization difference.
The present invention has excellent low thermal shrinkage behavior and low by the caused stress of rip cutting, so the present invention can be applied to use in the application of iron nickel alloy light sheet, and this sheet material unavoidably can be by little processing.
Claims (6)
1. method that is used to make Fe-Ni based alloy thin plate, wherein said method comprises:
With the last cold rolling thin plate of levelling machine aligning;
Then, described aligning thin plate is annealed in continuous annealing furnace, to remove its stress; With
Then, described thin plate rip cutting is become sheet material.
2. the method for claim 1 wherein when described thin plate being annealed when removing destressing, will be not more than 20N/mm in continuous oven
2Tension force be applied on the thin plate.
3. the method for claim 1 wherein will be annealed under the temperature of described thin plate in 400～750 ℃ of scopes, to remove destressing.
4. the method for claim 1 is wherein carried out rip cutting with described thin plate with a pair of crew-served disc cutter up and down, and the diameter of each disc cutter is by 750 times of rip cutting Fe-Ni plate thickness.
5. the method for claim 1 wherein described thin plate is carried out rip cutting with a pair of crew-served disc cutter up and down, and the lap of disc cutter is by 5～50% of rip cutting Fe-Ni plate thickness wherein.
6. the method for claim 1, wherein said Fe-Ni is made of following element by percentage to the quality:
Carbon: be not more than 0.1%
Silicon: be not more than 10%
Manganese: be not more than 1.2%
Nickel: 30～50%, and
All the other are essentially iron.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004283492 | 2004-09-29 | ||
| JP2004283492A JP4164828B2 (en) | 2004-09-29 | 2004-09-29 | Method for producing Fe-Ni alloy sheet material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1754968A true CN1754968A (en) | 2006-04-05 |
| CN100374583C CN100374583C (en) | 2008-03-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005101041851A Active CN100374583C (en) | 2004-09-29 | 2005-09-29 | Method for producing Fe-Ni based alloy thin plate |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP4164828B2 (en) |
| KR (1) | KR100699424B1 (en) |
| CN (1) | CN100374583C (en) |
| SG (1) | SG121095A1 (en) |
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| CN106955892A (en) * | 2015-09-30 | 2017-07-18 | 日立金属株式会社 | The manufacture method of Fe-Ni systems latten |
| CN106995904A (en) * | 2017-05-19 | 2017-08-01 | 广东省钢铁研究所 | A kind of preparation method of the anti-corrosion iron-nickel alloy band of antirust |
| US10233546B2 (en) | 2013-09-13 | 2019-03-19 | Dai Nippon Printing Co., Ltd. | Metal plate, method of manufacturing metal plate, and method of manufacturing mask by use of metal plate |
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| JPH06216304A (en) * | 1993-01-14 | 1994-08-05 | Daido Steel Co Ltd | Lead frame material for thin plate with multipin, and its manufacture |
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| JPH09136101A (en) * | 1995-11-09 | 1997-05-27 | Furukawa Electric Co Ltd:The | Manufacture of ni-ti alloy sheet and ni-ti alloy member |
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- 2005-09-29 CN CNB2005101041851A patent/CN100374583C/en active Active
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Also Published As
| Publication number | Publication date |
|---|---|
| KR100699424B1 (en) | 2007-03-28 |
| SG121095A1 (en) | 2006-04-26 |
| CN100374583C (en) | 2008-03-12 |
| JP2006097073A (en) | 2006-04-13 |
| KR20060051696A (en) | 2006-05-19 |
| JP4164828B2 (en) | 2008-10-15 |
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