CN104511477A - Thermal mechanical process - Google Patents
Thermal mechanical process Download PDFInfo
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- CN104511477A CN104511477A CN201410499642.0A CN201410499642A CN104511477A CN 104511477 A CN104511477 A CN 104511477A CN 201410499642 A CN201410499642 A CN 201410499642A CN 104511477 A CN104511477 A CN 104511477A
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- Prior art keywords
- steel
- distortion
- steel element
- temperature
- elongating
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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
- C21D8/06—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires
- C21D8/065—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires of ferrous alloys
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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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
-
- 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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0068—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for particular articles not mentioned below
-
- 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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
-
- 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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
- C21D9/525—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length for wire, for rods
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
A method for producing deformed and elongated steel elements comprises the following steps: hot-rolling steel wire rods or steel wires into deformed and elongated steel elements; heating the deformed and elongated steel elements at a temperature higher than the high transition temperature (Ac3/Acm) of steel; and after the heating, quenching the deformed and elongated steel elements.
Description
Technical field
The present invention relates to a kind of process of being produced distortion and elongation steel element by thermomechanical technique (Thermo-mechanical processing, TMP), particularly relate to the flat deforming steel wire or plain film be made up of TMP.
Background technology
Thermomechanical technique is the key component of the production line for multiple product made from steel now.The shape of steel and microstructure can be revised by TMP in order to the interests of final products and application.
US5922149A discloses one and is used for manufacturing lengthening deformation TMP wiry.Deformable metal silk or by cold forming (such as, rolling rolling) or produced by steel by hot forming.After, at least one quenching (quenching) operation is carried out to deformable metal silk.
US5542995A discloses a kind of method by rod, bar or seamed steel making flat strip steel or band.Steel part is heated to and is greater than Ac3/A
cMtemperature.Then steel is by least seven station hot rollings, to obtain final design band or ribbon shape.By hot-rolled strip or band quenching, wish grainiess to be formed.
Hot rolling and cold rolling be two kinds of common technique in the production of product made from steel, wherein steel needs mold pressing and redeformation.Steel rolling relates to metal stock and passes through a pair roller.Rolling produces plain plate or the band of specific thicknesses, and process is classified according to the temperature of rolled metal.If the temperature of metal is higher than its recrystallization temperature, or higher than the changeable temperature of grainiess of metal, be so hot rolling by process naming.On the contrary, cold rollingly usually at room temperature to carry out.
For course of hot rolling, large deformation repeats serially, and steel keeps soft and extending.The hardness of steel can not be controlled well by hot rolling, and it is the function of chemical composition and cooldown rate after rolling.Even if under the hardness of steel can be controlled in suitable low-level, it also can not increase through different passages.The hardness of hot-rolled product is generally low than the hardness of cold-rolled products, and the requirement strain energy of distortion of hot rolling is also less than and cold rollingly requires strain energy of distortion.In addition, during hot rolling, grain growth is accelerated, particularly for ordinary carbon steel, because temperature is higher than the austenitizing temperature (Ac3) (according to composition, generally higher than 725 DEG C ~ 825 DEG C) of steel.Meanwhile, when temperature is higher than 700 DEG C, increase significantly at the oxide of the outer surface of steel.Two facts are all harmful for the performance (such as intensity) of steel.And the experience of surface oxidation will cause material unaccounted-for (MUF) and bad final surface smoothness.
Cold-rolled process has the additional effect of work hardening and strengthening material, thus improves the mechanical performance of material further.It also improves surface smoothness, and keeps comparatively close tolerance, allows to wish quality by hot rolling institute is not getable.But room temperature steel specific heat steel has less ductility, the thickness of workpiece can not be reduced in once-through so cold rolling with hot rolling as many.In addition, the ductility of cold-rolled steel reduces due to strain hardening, thus makes it more crisp.
Summary of the invention
The object of this invention is to provide a kind of new TMP, this new TMP can avoid the shortcoming of prior art.
Object of the present invention is also to provide a kind of TMP, and this TMP can produce distortion and elongate steel element, and this distortion and elongation steel element have acceptable ductility and hardness.
A further object of the present invention is to provide a kind of TMP, and this TMP produces the distortion in required tolerance (tolerance) by less calendaring processes and elongates steel element.
Another object of the present invention is a kind of TMP of exploitation, by means of this TMP, by the high production rate ensureing constant and good quality, can produce deforming steel wire.
Another object of the present invention is that exploitation a kind of Economy T MP, this Economy T MP have low cost and little space requirement.
According to the present invention, provide a kind of process of producing distortion and elongating steel element.It comprises the steps: steel wire rod or warm the rolling into of steel wire are out of shape and elongate steel element, later at the comparatively high transition temperature (Ac3/A higher than steel
cM) temperature under heat distortion and elongate steel element; After heating, the quenching of steel element will be out of shape and elongate.Here, warmly roll (warm rolling) and refer to following process: the metal heated at elevated temperature is passed through between two rolls, and to flatten and elongate metal, these raised temperature at lower transition temperature (Ac1) below.Comparatively high transition temperature (Ac3/A
cM) or austenitizing temperature refer to the temperature wherein starting austenitic formation in Fe-C phasor.This temperature-independent is in steel grade and the carbon content in steel.Process according to the present invention by warm rolling, further austenitizing heating and quenching be combined in single tinuous production, make the more economical and Energy Efficient of production.Compared with hot rolling, according to the present invention, rod iron or steel wire remain on higher than Ac3/A
cMtemperature under duration rolled restriction by warm or shortened, be austenitizing heating later.This can be limited in the thickness of the oxide layer of surface on the one hand, and can control grain growth than under lower temperature on the other hand.Compared with the steel by conventional hot rolling technology, according to process of the present invention, the crystallite dimension of steel element is restricted, and much smaller.Because it is insensitive that less crystal grain compares coarse grain for hardening flaw, so increase fatigue life of steel element that process according to the present invention is produced.Moreover in warm or hot rolling, steel element will lose heat during contacting with milling train itself (roll), rolling emulsion and guide roller.Loss exists and will cause the very large danger of steel temperature fluctuation along steel wire, because will change relative to the time (such as, more emulsion splashes down on steel wire provisionally).By having other austenitizing operation after rolling, avoiding temperature fluctuation, causing the product made from steel of more homogeneous.Extraly and importantly, distortion and elongate the size of steel element or precision is controlled well by warm rolling.The tolerance (such as ± 20 μm, preferably ± 10 μm) of distortion and elongation steel element is acceptable in limited calendaring processes.
According to the present invention, wire rod or steel wire can be have the steel of scope from the carbon content of 0.1 to 1.0wt%.Preferably, wire rod or steel wire also can be ordinary carbon steels, and ordinary carbon steel preferably has the carbon content of scope from 0.45 to 0.70wt%.Steel wire can be semi-finished product, and these semi-finished product have circular cross section, and this circular cross section has the diameter of 2 to 5mm.Preferably, steel wire has the diameter of 3 to 4mm.Distortion and elongation steel element can be flat deforming steel wires, and this flat deforming steel wire has almost rectangular cross section.The scope of the width of flat deforming steel wire is from 5 to 10mm, and the scope of thickness is from 0.5 to 1.5mm.Preferably, the width with the flat deforming steel wire of almost rectangular cross section takes advantage of thickness to be 6 × 0.8mm, 7 × 0.9mm or 7 × 1.0mm.The flat deforming steel wire of thinner or small size is difficult to accurately be produced by hot rolling.When the heat of Heating Steel Wire is when steel wire leaves austenitizing stove or when steel wire and roll contact, due to small size and the thus low capacity of steel wire, will dissipate rapidly.Thermal loss is compared to the steel wire with large cross-sectional area for the steel wire with little cross-sectional area and more may occurs.According to the present invention, warm rolling makes to produce the thin or flat deforming steel wire of small size and becomes possibility.
The rolling station that steel wire passes through is more, and thickness reduces more.The quantity at the rolling station of application depends on wishes that thickness reduces.In the present invention, distortion and elongation steel element can reduce warm milling trains by two thickness, and namely the first warm milling train and second warms up milling train, is rolled down to final size.Two warm milling trains are used for being flattened from the diameter of about 4mm by the thickness of steel wire or being reduced to flat shape, and the width that this flat shape has about 7 × 0.9mm takes advantage of thickness.According to desired decrease, more rolling stations also can be applied.With for similar reduction cold rolling compared with, warm application of rolling simplifies process significantly, and reduces costs.
According to the present invention, reduce, between warm milling train, can measure and control the tension force of forming steel element before the first thickness reduces warm milling train and at two thickness.Moreover distortion and elongation steel element are by the first and second thickness, the right angle reduced between warm milling train is formed or edge rolling station rolling.Importantly make tension force minimum, and/or make it in steel wire, keep constant, this steel wire moves between stations.Tension force can cause significantly attenuating or disconnecting of steel wire.Precise speed regulating system can be used to control rate, and roll is actuated to make tension force minimum at such speeds.More particularly, importantly constant tension is kept.
According to the present invention, before rolling first by wire rod or steel wire heating to such as 400 DEG C to 700 DEG C, preferably 600 DEG C to 700 DEG C.Any suitable heating means can be used for heating wire rod or steel wire, as heated in resistance furnace, baking oven, infra-red radiation (IR) heater, gas burner, fluid bed or through any conduction.As another example, Medium Frequency Induction Heating Furnace also can be used for Heating Steel Wire.Here, intermediate frequency means the frequency of scope from 10 to 200kHz.Preferably, roll period use unit warm, the temperature of this unit adjustment steel, to compensate contingent thermal loss during milling step.After warm rolling, distortion and elongation steel element be austenitizing by further thermal process.Thermal process can be carried out in resistance furnace, IR stove or high-frequency induction furnace.Preferably, stove inertia or reducing gas rinse, and as with nitrogen wash, avoid oxidation to be remained in protective atmosphere by steel.Here, high frequency means the frequency of scope from 250kHz to 2MHz.Have been found that the skin depth of the frequency determination object of eddy-current heating.In the present invention, skin depth preferably adapts to according to steel wire thickness/diameter, to obtain high-efficiency heating.
According to the present invention, quench distortion and elongate steel element austenitizing after carry out.Quenching is very rapidly cooled to low temperature from high temperature.According to the present invention, quench starts more than austenitizing temperature.Quenching Step can be reduced at temperature (M
s) and temperature (M
f) between occur, at temperature (M
s), martensite is formed and starts, at temperature (M
f), martensite is formed and terminates.Preferably, quench be less than 30 seconds (being preferably less than 6 seconds, more preferably little 3 seconds) period during be reduced to M
ffollowing temperature, such as 100 DEG C, to form martensitic structure.Quenching can be carried out in oil groove, salt bath, polymer groove or in the sink.Then by the distortion of quenching and elongate steel element under the temperature of scope from 320 DEG C to 600 DEG C in scope from tempering during period of 1 to 200 second (selection of land 1 to 20 second), to discharge stress and there is necessary ductility.Tempering (tempering) can in salt bath, in the groove of suitable metal alloy with low melting point, carry out in suitable stove or baking oven, or can reach by means of the combination of induction or stove and induction.Then will be out of shape and elongate steel element cool to room temperature.
Selectively, tempering can be less than 60 seconds and during being preferably less than the period of 30 seconds, being reduced to martensite and forming the temperature (M started
s) more than temperature, to form pearly-lustre (perlitic) structure.Tempering can be reduced to a little higher than M
stemperature.Such as, the beginning temperature M of the martensite transfor mation of steel
scomposition according to steel is about 280 DEG C, and tempering was reduced to the temperature of about 300 DEG C in 30 seconds.
Overall Steps carries out in a single tinuous production.Here, " single tinuous production " means, a treatment step is directly followed by another treatment step and do not interrupt, until complete Overall Steps.Save space and energy significantly according to process of the present invention, and simplify the requirement for equipment.
Final products are distortion and elongate steel element, specifically have flat deforming steel wire or the flat blade of almost rectangular cross section.This flat deforming steel wire or flat blade can be used as the wiper of automotive window, spring wire or reinforcing element.
Accompanying drawing explanation
Fig. 1 be according to a first embodiment of the present invention be used for manufacture distortion and elongate the schematically illustrating of TMP of steel element.
Fig. 2 represents the Temperature Distribution of steel element according to a first embodiment of the present invention.
Fig. 3 represents the Temperature Distribution of steel element according to a second embodiment of the present invention.
Detailed description of the invention
Embodiment 1
Starting material is the round wire with 3.5mm diameter.It can have various constituent, the carbon content of such as 0.45 to 0.75wt%, and remainder is iron.
Fig. 1 is used to schematically illustrating of the TMP manufacturing distortion and elongate steel element.Basic or the characteristic processing step passed through according to steel wire of the present invention warmly rolls (WR1) by the first heating (H1), first, the measurement (M1), second of tension force of steel wire warmly rolls (WR2), the square of the second heating or austenitizing (H2) and tempering (Q) indicates.These steps will be discussed further below.In FIG, the cross section of steel wire after each step is schematically shown.During thermodynamic process, the Temperature Distribution of steel wire schematically represents in fig. 2.
The first step of technique is unwrapping wire (pay-off) step, wherein, starts material, namely has the round wire of 3.5mm diameter, is assigned with and begins through each step of process.Unwrapping wire can utilize slewing circle disc type payoff reel axle and complete.Preferably, utilize and there are two dual stations of disc type spool, thus while the first volume is released, can volume Two be loaded.
For coil the next step of round wire be aligning (straightening) step, wherein, steel wire is aligned at least in part, and curling for wire rod (coil set) is removed at least in part.Straightening step can utilize conventional straightener to carry out.Then before further processing, steel wire cleaned and remove the oxide skin on steel wire.Steel wire can be drawn to reduce diameter by drawing-die, and can increase tensile strength further.
With reference to Fig. 1, next step is the first thermal process for steel wire represented by square H1.Drawn wire (11) is heated to desired temperature in intermediate frequency furnace, such as 600 DEG C to 700 DEG C.This is indicated by stage A in the Temperature Distribution of steel wire as shown in Figure 2.The position of drawn wire, especially tension force, preferably in the pre-test by Medium Frequency Induction Heating Furnace.
Next step is that steel wire (12) is warmed up in rolling, and the first warm roll (WR1) and second that this rolling preferably includes as shown in Figure 1 warms up and roll (WR2).Warm round wire (12) is first driven, and by the first milling train (WR1).Steel wire (12) is shaped as flat shape, and simultaneously, reduces the thickness of steel wire (12).Due to the remarkable temperature difference between steel wire and roll, when warm steel wire contact roll, heat transmission occurs from warm steel wire to cold-rolling mill.The thermal loss of steel wire causes its slight temperature to fall.This temperature is fallen and is fallen reflection by the First stepwise temperature in the stage B of Fig. 2.The preferably unit of the temperature of Use Adjustment steel.Then steel wire (13) is by tonometry and control unit, to make the tension force of the steel wire moved between stations minimum.Can apply rectangle and form station, this rectangle forms station and has flat top portion and lower rolls, and these flat top portion and lower rolls have flat grooving of roll, to produce rectangular cross section steel.Selectively, the rolling of non-driven edge can be applied, to control width and the edge variation of flat deforming steel wire.After, in order to further thickness reduces, application second is warm rolls (WR2).By the second step formula temperature in the stage B of Fig. 2, instruction is fallen at the second warm thermal loss rolling period steel wire.Steel wire (14) after these milling step has flat shape and almost rectangular cross section, and this rectangular cross section has the width of 6 to 10mm and the thickness of 0.8 to 1.5mm.The tolerance of the thickness of flat deforming steel wire is about ± 20 μm.
Next step is, by the second thermal process in fig. 2 representated by square H2 by flat deforming steel wire austenitizing.Any available stove can be used as austenitizing stove, preferably applies high-frequency induction generator.Flat deforming steel wire is heated to the temperature higher than the some Ac3 of steel, such as, higher than 900 DEG C.This is represented by the stage C in the Temperature Distribution of the steel wire of Fig. 2.By means of austenitizing stove, the temperature of steel wire (15) is coordinated and remains on the temperature higher than the some Ac3 of steel, such as about 950 DEG C (stage D in fig. 2).
In this embodiment, in order to martensitic metallurgical transformation, carry out quench (square Q in FIG).This is represented by the stage E in Fig. 2.During being such as less than the period of 6 seconds, flat deforming steel wire (15) being reduced to from the temperature that the some Ac3 than steel is high and forming at martensite the temperature (M in fig. 2 terminated
f) following temperature, be such as reduced to the temperature of about 100 DEG C from the temperature of about 950 DEG C, and promptly quench.Quenching can be carried out in oil groove, salt bath or in polymer groove.
Preferably, tempering is after quenching wished.By quenching flat deforming steel wire (16) such as between 320 to 600 DEG C (preferably between 350 to 500 DEG C) temperature range in tempering.Then by flat deforming steel wire cool to room temperature.
Finally, by flat deforming steel wire cutting and transfer, to allow continuous process.Obtain final products.
In addition, pressing steps can be applied, and steel wire preferably scribbles polymer.Such as, steel wire scribbles polyvinyl chloride (PVC), preferably scribbles polyethylene terephthalate (PET).
All above step is carried out in a single continuous Production for Steel Wire line, and this single continuous Production for Steel Wire line is designed to the speeds at 100m/min to 200m/min, such as: at the speeds of about 120m/min, 150m/min and 180m/min.
Embodiment 2
According to a second embodiment of the present invention, form perlitic structure after quenching, this perlitic structure is different from the martensitic structure about the first embodiment.Temperature Distribution according to the steel wire of the second embodiment shows in figure 3.
Process similar to the first embodiment except quenching is carried out for steel wire.According to the second embodiment, in the quenching Step referenced by square Q in FIG, the flat deforming steel wire (stage D in figure 3) from austenitizing stove is cooled rapidly (stage EI in figure 3) to a little higher than temperature M
stemperature.Such as, flat deforming steel wire is cooled fast to about 580 DEG C (as about 30 seconds) from about 950 DEG C, and keeps a period of time at about 580 DEG C.Then steel wire is cooled further in water, as represented by stage EII in figure 3.As an example, with about 20 minutes, steel wire is cooled to 100 DEG C from 580 DEG C.
Selectively, water air patenting technique can be applied.By steel wire from all austenitizing temperature gradually or lentamente cool to room temperature of 950 DEG C according to appointment.
By the flat deforming steel wire of quenching Step technique, there is perlitic structure according to the second embodiment.
Here the present invention of illustrative description suitably can put into practice when not having clear and definite disclosed any element (one or more), restriction (one or more) here.Should be appreciated that, although the present invention is disclosed clearly by preferred embodiment and selectional feature, the modifications and variations of the present invention implemented here can be utilized by those skilled in the art, and such modifications and changes are thought within the scope of the invention.
Claims (15)
1. produce distortion with the method for steel element of elongating, comprise the steps:
Steel wire rod or steel wire are warmed up roll into distortion with elongate steel element;
Subsequently at the temperature of the comparatively high transition temperature (Ac3/Acm) higher than steel heat distortion with elongate steel element; And
After heating, quenching with the steel element elongated by distortion.
2. according to claim 1 that produce distortion with the method for steel element of elongating, wherein, distortion with the thickness tolerance of the steel element elongated be ± 20 μm.
3. according to claim 1 and 2 that produce distortion with the method for steel element of elongating, wherein, wire rod or steel wire have the steel of scope from 0.1 to 1.0wt% carbon content.
4. the production distortion according to above any one of claim with the method for steel element of elongating, wherein wire rod or steel wire are ordinary carbon steels.
5. the production distortion according to above any one of claim with the method for steel element of elongating, wherein wire rod or steel wire have circular cross section, and this circular cross section has the diameter of 2 to 5mm.
6. the production distortion according to above any one of claim with the method for steel element of elongating, wherein, distortion be flat deforming steel wire with the steel element elongated, it is size from 0.5 to 1.5mm that this flat deforming steel wire has width range from 5 to 10mm and thickness range.
7. according to claim 6 that produce distortion with the method for steel element of elongating, wherein, distortion reduce warm mill milling to described size with the steel element elongated by the first and second thickness.
8. according to claim 7 that produce distortion with the method for steel element of elongating, wherein, before the first thickness reduces warm milling train and reduce between warm milling train at the first and second thickness, that control described distortion with tension force that the is steel element elongated.
9. the production distortion according to above any one of claim with the method for steel element of elongating, wherein, before warm rolling, heat in one of resistance furnace, baking oven, infra-red radiation (IR) heater, Medium Frequency Induction Heating Furnace, gas burner, fluid bed or through any conduction, the temperature to scope from 400 DEG C to 700 DEG C by wire rod or steel wire heating.
10. the production distortion according to above any one of claim with the method for steel element of elongating, wherein, heat and carry out in resistance furnace, one of IR stove or high-frequency induction furnace.
11. production distortion according to any one of claim 7 to 10 with the method for steel element of elongating, wherein, distortion and the steel element that elongates by the first and second thickness, the right angle reduced between warm milling train is formed or edge rolling station rolling.
12. production distortion according to above any one of claim with the method for steel element of elongating, wherein, during being less than the period of 30 seconds, quenching is reduced to temperature (M
f) below to form martensitic structure, wherein at described temperature (M
f), martensitic structure is formed and terminates.
13. production distortion according to above any one of claim with the method for steel element of elongating, wherein, by the distortion after quenching with the steel element elongated scope from the temperature of 320 DEG C to 600 DEG C, in scope from tempering during period of 1 to 200 second.
14. production distortion according to any one of claim 1 to 11 with the method for steel element of elongating, wherein, during being less than the period of 60 seconds, quenching is reduced to temperature (M
s) more than temperature to form perlitic structure, wherein at this temperature (M
s), martensitic structure is formed and starts.
15. production distortion according to above any one of claim with the method for steel element of elongating, wherein, distortion be used as the wiper of automotive window, spring wire or reinforcing element with the steel element elongated.
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|---|---|---|---|
| CN202110323166.7A CN113061702A (en) | 2013-09-27 | 2014-09-26 | Thermomechanical process |
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|---|---|---|---|
| EP13186376 | 2013-09-27 | ||
| EP13186376.3 | 2013-09-27 |
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| CN201410499642.0A Pending CN104511477A (en) | 2013-09-27 | 2014-09-26 | Thermal mechanical process |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017133789A1 (en) * | 2016-02-05 | 2017-08-10 | Nv Bekaert Sa | Thermomechanical processing |
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| JPH06179004A (en) * | 1992-12-11 | 1994-06-28 | Nippon Steel Corp | Small diameter edging roll |
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- 2014-09-26 CN CN201410499642.0A patent/CN104511477A/en active Pending
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|---|---|---|---|---|
| GB2024871A (en) * | 1978-07-08 | 1980-01-16 | Roechling Burbach Gmbh Stahl | Method and apparatus for the heat treatment of coiled wire or strip |
| CN1300648A (en) * | 1999-12-23 | 2001-06-27 | Sms迪马格股份公司 | Method for heat treatment of wires |
| CN1771341A (en) * | 2003-04-04 | 2006-05-10 | 泰森克鲁普汽车股份公司 | Method for the thermomechanical treatment of steel |
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| 中国金属学会特殊钢学术委员会等: "《国外轴承钢工艺研究进展》", 31 January 1983, 中国金属学会特殊钢学术委员会冶金工业部钢铁研究总院 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017133789A1 (en) * | 2016-02-05 | 2017-08-10 | Nv Bekaert Sa | Thermomechanical processing |
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