CN106636593B - The production and processing technology of superplasticity pure iron material - Google Patents
The production and processing technology of superplasticity pure iron material Download PDFInfo
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- CN106636593B CN106636593B CN201611235448.7A CN201611235448A CN106636593B CN 106636593 B CN106636593 B CN 106636593B CN 201611235448 A CN201611235448 A CN 201611235448A CN 106636593 B CN106636593 B CN 106636593B
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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
- C21D1/26—Methods of annealing
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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
- C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
-
- 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
- C21D2201/00—Treatment for obtaining particular effects
- C21D2201/02—Superplasticity
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
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Abstract
The present invention discloses a kind of production and processing technology of superplasticity pure iron material, includes following steps: (1) selection: selecting the model CH1T material of domestic production as base material；(2) drawing: drawing is carried out to material using roller die drawing technology and obtains steel wire；(3) it anneals: using isothermal recrystalization annealing process, steel wire material is placed in heat-treatment furnace, inert gas is filled in heat treated furnace, then the temperature in furnace is risen to 660-680 DEG C, keeps the temperature 1-2h；Then, it is cooled to 580-600 DEG C with the cooling velocity of 15-20 DEG C/h, and keeps the temperature 2-3h, then, with the cooling velocity of 30-50 DEG C/h to room temperature.Through the invention after process, through the invention after process, obtained wire rod plasticity is high, it does not crack through 1/4 cold heading test deformed above, wire rod possesses higher elongation: >=90%, ultralow hardness: HV≤90, crystal grain refinement: average grain size >=11 grade, grain size is uniform, at equi-axed crystal, chip area is poor≤and 5%.
Description
Technical field
The present invention relates to wire production manufacture field technologies, refer in particular to a kind of production and processing work of superplasticity pure iron material
Skill.
Background technique
Superplastic metal obtains relatively broad application in industry production field in recent years.Some superplastic conjunctions
Nintaus with their excellent deformation performances and it is uniform in material the features such as, the components of aerospace and automobile production, technique
Play the role of not alternatively in the production of product manufacture, instrument and meter clamshell part and some complex appearance components.Super modeling simultaneously
There has also been significantly increase for the kind and number of property metal.
Due to the progress at full speed of Study of Superplasticity, there is the application of noticeable aluminium alloy in the automotive industry.?
In 8th superplasticity international conference, the motor corporation of Japan and the states such as Switzerland describe produced with superplastic forming method it is big
Type aluminum alloy covering part opens prospect for the application of superplastic forming in the automotive industry.Superplastic forming with no spring-go, only
The advantages such as need unilateral mold, either simplex sequence, equipment load low, but there is also some problems, up for further solving.Due to
The schemes such as blank preheating, heat die sinking, manipulator pickup or more workbench alternating are used in production, drop the superplastic forming period
To 10 min or less.And common punching press needs multiple devices, multi-process, in comparison, current superplastic forming efficiency is
Acceptable.But for the super modeling aluminum alloy plate materials price of current fine grain at 10 times or so of common plate, this makes superplastic forming
Covering cost is high, it is difficult to large-scale application.On the one hand its reason is that aluminium alloy fine grain plate preparation cost is higher,
It on the other hand is that its application surface is relatively narrow.Superplasticity is in automobile industry using it is still necessary to want metallurgical department, auto industry using department
Joint efforts.
Nowadays, further development, various fine precision parts materials and processing technology are achieved for superplastic research
It is the hot spot studied in the world, and has become one of the developing direction of 21st century plastic forming technology.It is manufactured by microsecond delay
Part (outer dimension be grade even submicron order) be generally used for micromachine or microelectromechanical-systems, be applied to national defence,
Space science and other high-tech research fields.Compared with conventional plastic molding method, superplastic forming can obtain under low stress
Deformation greatly is obtained, there is unique superiority in terms of microsecond delay.The researcher in China has carried out beneficial taste in this respect
Examination is had studied the super modeling characteristic of 1420Al-Li alloy, and is ground using surface with the mold of two kinds of forms of microflute and micropore
The microsecond delay of the alloy is studied carefully.In addition, it should which what is drawn attention is the superplastic forming technology of Fine Precision Amorphous Alloy Parts.
Using amorphous alloy and superplastic forming technology, high-performance, high-precision Fine Machinery components can be prepared.External can use surpasses
Modeling squeezes and forging method manufactures amorphous alloy precision optical instrument component and ultra micro gear.
Superplasticity is in terms of in China and in the world, main developing direction mainly has following three:
1. the superplastic research of advanced material, since superplastic material has several excellent performances, in high-tech sector
Have a wide range of applications distant view.However the general processing performance of these materials is poor, the superplasticity for developing these materials answers it
With being of great significance；
2. the research of high-speed measuring: i.e. the rate of superplastic deformation, it is therefore intended that promote the productivity of superplastic forming；
3. studying the superplastic deformation rule of non-ideal superplastic material, the harshness reduced to superplastic deformation material is inquired into
It is required that and the quality for the drip molding that improves, it is therefore intended that the application range for expanding Superplastic Technology makes it play bigger benefit.
Summary of the invention
In view of this, in view of the deficiencies of the prior art, the present invention aims to provide a kind of superplasticity pure iron
The production and processing technology of material, the product for producing and processing out have the characteristics that plasticity is high, elongation is high, hardness is low.
To achieve the above object, the present invention is using following technical solution:
A kind of production and processing technology of superplasticity pure iron material, includes following steps:
(1) selection: selecting the model CH1T material of domestic production as base material, and the control of alloying element Ti content exists
0.06-0.12%, S, P content are 0.020% hereinafter, inside is without non-metallic inclusion；
(2) drawing: drawing is carried out to material using roller die drawing technology and obtains steel wire；
(3) it anneals: using isothermal recrystalization annealing process, steel wire material is placed in heat-treatment furnace, is filled in heat treated furnace
Enter inert gas, then the temperature in furnace is risen to 660-680 DEG C, keeps the temperature 1-2h；Then, with the cooling velocity of 15-20 DEG C/h
It is cooled to 580-600 DEG C, and keeps the temperature 2-3h, then, with the cooling velocity of 30-50 DEG C/h to room temperature.
As a preferred embodiment, the inert gas is methanol, and methanol stream amount is 2L/min.
The present invention has obvious advantages and beneficial effects compared with the existing technology, specifically, by above-mentioned technical proposal
Known to:
Through the invention after process, obtained wire rod plasticity is high, does not crack through 1/4 cold heading test deformed above, line
Material possesses higher elongation: >=90%, ultralow hardness: HV≤90, crystal grain refinement: average grain size >=11 grade, crystal grain
Uniformly, at equi-axed crystal, chip area is poor≤5% for degree.Its properties is obviously superior at present it can be seen from the above index
Market similar products, can preferably be applied to rivet processing industry, improve the product of rivet industry production service performance and at
Material rate has good market prospects, creates considerable economic benefit for company.
Detailed description of the invention
Fig. 1 is the main view of central roll drawing-die of the present invention.
Specific embodiment
Present invention discloses a kind of production and processing technologies of superplasticity pure iron material, include following steps:
(1) selection: selecting the model CH1T material of domestic production as base material, and the control of alloying element Ti content exists
0.06-0.12%, S, P content are 0.020% hereinafter, inside is without non-metallic inclusion；To ensure the modeling with higher of its material
Property.Excellent raw material are selected to be even more important, since the plasticity of material is mainly related to its chemical component composition and microscopic structure,
Control chemical component and excellent microscopic structure are all very important, it is desirable that material must have higher degree of purity, seldom
Non-metallic inclusion.
(2) drawing: drawing is carried out to material using roller die drawing technology and obtains steel wire, the roller drawing-die that roller die drawing uses is such as
Shown in Fig. 1；During the drawing process, because wire rod plasticity itself is good, in normal drawing process, too big pulling capacity cannot be used,
Its fracture is easily led to, therefore generallys use small reduction ratio and carries out drawing, and the material after small reduction ratio drawing is unfavorable for subsequent move back
Fiery manufacturing procedure, therefore drawing procedure of the present invention takes roller die drawing technology, during the drawing process, using lesser pulling capacity,
Can be achieved with biggish compression ratio drawing, the deflection generated in this way is bigger, and the interior tissue of steel wire is thinner, and it is more broken, it generates
Stress value is higher, provides more energy for subsequent anneal, improves Oxygen potential, crystal grain is more tiny, and plasticity further increases.
(3) it anneals: using isothermal recrystalization annealing process, steel wire material is placed in heat-treatment furnace, is filled in heat treated furnace
Enter inert gas, then the temperature in furnace is risen to 660-680 DEG C, keeps the temperature 1-2h；Then, with the cooling velocity of 15-20 DEG C/h
It is cooled to 580-600 DEG C, and keeps the temperature 2-3h, then, with the cooling velocity of 30-50 DEG C/h to room temperature.The inert gas is first
Alcohol, methanol stream amount are 2L/min.Annealing process is most important, using isothermal recrystalization annealing process, key point: 1. to temperature
The control of degree, holding temperature cannot be too high, otherwise uniformly form single austenite structure, lead to coarse grains, naturally just not
2. the plasticity having had controls the speed of temperature decline, use cools down stage by stage, i.e., when being cooled to certain temperature, carries out
It is cooled down after heat preservation a period of time, makes the equalizing temperature of material, guarantee forms tiny and uniform crystal grain, while in rule
Spherical arrangement,
With multiple embodiments, the invention will be further described below:
Embodiment 1:
(1) selection: selecting the model CH1T material of domestic production as base material, and the control of alloying element Ti content exists
0.06%, S, P content are 0.019%, and inside is without non-metallic inclusion；
(2) drawing: drawing is carried out to material using roller die drawing technology and obtains steel wire；
(3) it anneals: using isothermal recrystalization annealing process, steel wire material is placed in heat-treatment furnace, is filled in heat treated furnace
Enter inert gas, then the temperature in furnace is risen to 680 DEG C, keeps the temperature 1.5h；Then, it is cooled to the cooling velocity of 18 DEG C/h
580 DEG C, and 2h is kept the temperature, then, with the cooling velocity of 40 DEG C/h to room temperature.The inert gas is methanol, and methanol stream amount is
2L/min。
Embodiment 2:
(1) selection: selecting the model CH1T material of domestic production as base material, and the control of alloying element Ti content exists
0.12%, S, P content are 0.018% hereinafter, inside is without non-metallic inclusion；
(2) drawing: drawing is carried out to material using roller die drawing technology and obtains steel wire；
(3) it anneals: using isothermal recrystalization annealing process, steel wire material is placed in heat-treatment furnace, is filled in heat treated furnace
Enter inert gas, then the temperature in furnace is risen to 670 DEG C, keeps the temperature 1h；Then, 600 are cooled to the cooling velocity of 15 DEG C/h
DEG C, and 2.5h is kept the temperature, then, with the cooling velocity of 50 DEG C/h to room temperature.The inert gas is methanol, and methanol stream amount is
2L/min。
Embodiment 3:
(1) selection: selecting the model CH1T material of domestic production as base material, and the control of alloying element Ti content exists
0.10%, S, P content are 0.015%, and inside is without non-metallic inclusion；
(2) drawing: drawing is carried out to material using roller die drawing technology and obtains steel wire；
(3) it anneals: using isothermal recrystalization annealing process, steel wire material is placed in heat-treatment furnace, is filled in heat treated furnace
Enter inert gas, then the temperature in furnace is risen to 660 DEG C, keeps the temperature 2h；Then, 590 are cooled to the cooling velocity of 20 DEG C/h
DEG C, and 3h is kept the temperature, then, with the cooling velocity of 30 DEG C/h to room temperature.The inert gas is methanol, and methanol stream amount is 2L/
min。
By the product obtained after above-mentioned each embodiment processing carry out nodularization body rank, grain size, decarburized layer deepness,
After core hardness (HV0.3), metallographic structure and heat treatment product level examine, nodularization body rank, grain size, decarburized layer deepness,
The method of inspection of product level is existing mature technology after core hardness (HV0.3), metallographic structure and heat treatment, at this to nodularization
The method of inspection of product level after body rank, grain size, decarburized layer deepness, core hardness (HV0.3), metallographic structure and heat treatment
It does not describe in detail, the data examined are as shown in the table:
Through the invention after process, obtained wire rod plasticity is high, does not crack through 1/4 cold heading test deformed above, line
Material possesses higher elongation: >=90%, ultralow hardness: HV≤90, crystal grain refinement: average grain size >=11 grade, crystal grain
Uniformly, at equi-axed crystal, chip area is poor≤5% for degree.Its properties is obviously superior at present it can be seen from the above index
Market similar products, can preferably be applied to rivet processing industry, improve the product of rivet industry production service performance and at
Material rate has good market prospects, creates considerable economic benefit for company.
The above described is only a preferred embodiment of the present invention, be not intended to limit the scope of the present invention,
Therefore any subtle modifications, equivalent variations and modifications to the above embodiments according to the technical essence of the invention, still
Belong in the range of technical solution of the present invention.
Claims (1)
1. a kind of production and processing technology of superplasticity pure iron material, it is characterised in that: include following steps:
(1) selection: selecting the model CH1T material of domestic production as base material, and the control of alloying element Ti content exists
0.06-0.12%, S, P content are 0.020% hereinafter, inside is without non-metallic inclusion；
(2) drawing: drawing is carried out to material using roller die drawing technology and obtains steel wire；
(3) it anneals: using isothermal recrystalization annealing process, steel wire material is placed in heat-treatment furnace, is filled in heat treated furnace lazy
Property gas, then the temperature in furnace is risen to 660-680 DEG C, keeps the temperature 1-2h；Then, cooling with the cooling velocity of 15-20 DEG C/h
To 580-600 DEG C, and 2-3h is kept the temperature, then, with the cooling velocity of 30-50 DEG C/h to room temperature.
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| CN201611235448.7A CN106636593B (en) | 2016-12-28 | 2016-12-28 | The production and processing technology of superplasticity pure iron material |
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| CN111383861B (en) * | 2018-12-28 | 2022-06-17 | 东莞科力线材技术有限公司 | Magnetic conductive material for electromagnetic relay and preparation method thereof |
| CN113462869B (en) * | 2021-07-22 | 2022-11-22 | 南京宝日钢丝制品有限公司 | Treatment method of heat-resistant alloy cold-heading steel wire |
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| FR2607519B1 (en) * | 1986-11-27 | 1989-02-17 | Michelin & Cie | METHOD AND DEVICE FOR HEAT TREATING A STEEL WIRE |
| CN104625489A (en) * | 2012-11-30 | 2015-05-20 | 江苏天业合金材料有限公司 | Production technology for automatic low alloy steel welding wire for ship |
| CN105525223A (en) * | 2015-12-29 | 2016-04-27 | 东莞市科力钢铁线材有限公司 | Production process for super-plastic steel and iron material for large-diameter hexagon bolt |
| CN105568155A (en) * | 2015-12-29 | 2016-05-11 | 东莞市科力钢铁线材有限公司 | Production process of super-plasticity low-carbon steel material used for turning rivet |
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Address after: 523000 Dongxing Industrial Park, Wangniudun Town, Dongguan City, Guangdong Province Applicant after: Dongguan Keli Wire Technology Co. Ltd. Address before: 523000 Dongguan Keli Iron and Steel Wire Co., Ltd. Dongxing Industrial Park, Wangniudun Town, Dongguan City, Guangdong Province Applicant before: Dongguan Kelee Steel Wire Co., Ltd. |
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