CN104388829A - Oriented iron-based shape memory alloy and preparation method thereof - Google Patents
Oriented iron-based shape memory alloy and preparation method thereof Download PDFInfo
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Abstract
The invention discloses an oriented iron-based shape memory alloy and a preparation method thereof, relates to the field of novel metal functional materials and particularly relates to the oriented iron-based shape memory alloy and the preparation method thereof. In order to solve such problems of the existing iron-based shape memory alloy as poor shape memory capability, low restoring force and low strength, the oriented iron-based shape memory alloy comprises the following alloy components in percentage by mass: 10%-20% of Mn, 5.0%-7.0% of Si, 6.0%-7.5% of Cr, 0.5%-1.0% of Cu, not more than 0.02% of C and the balance of Fe. The preparation method comprises the following steps: firstly, placing the A3 steel, electrolytic manganese, ferrosilicon and ferrochrome in a medium-frequency induction furnace for smelting, casting and molding; secondly, machining by virtue of a wire-cutting method; and thirdly, annealing, carrying out compression deformation and annealing again to obtain the oriented iron-based shape memory alloy.
Description
Technical field
The present invention relates to novel metal field of functional materials, be specifically related to a kind of orientation iron-base marmem and preparation method thereof.
Background technology
At present, the iron-base marmem developed, mainly through the means of alloying, improves shape memory response rate and the mechanical property of material.The shape memory effect of iron-base marmem is produced by martensitic transformation, namely austenite phase transition occurs under certain stress condition is martensitic phase, the shear that phase transformation causes the specific atoms layer of lattice to be less than an interatomic distance is moved, and the result of this atomic shell shear superposition forms the viscous deformation of macroscopic view.Near martensitic transformation temperature, reverse transformation occurs, and strain-induced martensite changes austenite into, and material returns to original shape.The ubiquitous problem of iron-base marmem developed at present is, alloy shape response rate is on the low side, and material mechanical performance is unstable and corrosion resistance is poor.FeMnSi suitable shape memory alloy be develop the most thorough, the iron-base marmem that technology is the most ripe, the common shape memory response rate of this kind of alloy is no more than 10%, be difficult to satisfied industrial needs, in order to improve shape-memory properties further, need improve the content of manganese in alloy, in material, manganese reaches 12at%-32at%.Too high manganese makes the corrosion resistance of material be adversely affected, and for improving the antioxidant anticorrosive performance of material, chromium, the elements such as nickel are added in the FeMnSi series alloy of recent development; The other method improving iron-base marmem comprises, mechanical training and as-cast structure annealing.Can make in alloy, to hinder the factor of martensitic transformation to slacken in distortion repeatedly by mechanical training, and alloy annealing is mainly in order to by the crystal structure defects of low material internal and unrelieved stress.The iron-base marmem of current exploitation is in order to improve shape-memory properties, and need to keep as cast condition or ground dislocation desity viscous deformation tissue signature, alloy structure defect is more, intensity, lower hardness.In order to improve intensity and the restoring force of material, add a small amount of C element in alloy in recent years.C element may to Martensitic Transformation disadvantageous effect, the content of C element will be subject to stricter restriction in the alloy, usual C content is no more than heterogeneity FeMnSi suitable shape memory alloy that more than 0.2at%. developed by alloyage process often while overcoming a kind of performance deficiency, weaken again other materials performance, the entirety all not reaching shape-memory properties, mechanical property and corrosion resistance improves.
Summary of the invention
The present invention is to solve the problem that existing iron-base marmem shape memory is poor, restoring force is low and intensity is low, and provides a kind of orientation iron-base marmem and preparation method thereof.
Alloying constituent and the mass percentage thereof of a kind of orientation iron-base marmem of the present invention are: the Mn of 10% ~ 20%, the Si of 5.0% ~ 7.0%, 6.0% ~ 7.5% Cr, 0.5% ~ 1.0% Cu, be not more than the C of the 0.02% and Fe of surplus.
The preparation method of a kind of orientation iron-base marmem of the present invention carries out according to the following steps:
One, A3 steel, electrolytic manganese, 75 ferrosilicon and ferrochrome are placed in medium-frequency induction furnace melting, smelting temperature is 1350 ~ 1450 DEG C, and 5min ~ 10min is incubated at temperature is 1350 ~ 1450 DEG C, then clay sand mold or water glass sand casting forming is adopted, foundry goods mold clearing temperature, not higher than 200 DEG C, obtains as cast condition iron-base marmem; Described A3 steel and the mass ratio of electrolytic manganese are 100:(21 ~ 25); Described A3 steel and the mass ratio of 75 ferrosilicon are 100:(10 ~ 14); Described A3 steel and the mass ratio of ferrochrome are 100:(15 ~ 19);
Two, as cast condition iron-base marmem step one obtained adopts wire cutting method to carry out mechanical workout, obtains blank;
Three, blank electric heat treating furnace step 2 obtained is to annealing, annealing temperature is 400 ~ 500 DEG C, annealing time is 8h ~ 12h, then carry out compression set, deformation rate 15% ~ 30% with pressing machine to the blank after annealing, rate of deformation is no more than 5mm/s, anneal again after distortion, annealing temperature is 600 ~ 800 DEG C, and annealing time is 2h ~ 3h, obtains orientation iron-base marmem.
Beneficial effect of the present invention:
The present invention is in order to reach the comprehensive raising of FeMnSi system iron-base marmem performance, and take a set of new iron-base marmem preparation method, utilize castmethod synthesis iron base shape memory alloy, form as-cast structure, then casting residual stress is eliminated by annealing, make alloy structure homogenization of composition, pressing machine is adopted to carry out compression set to it again, obtain stable obvious deformation texture, and then carry out an anneal, after annealing, Brinell hardness is not higher than HB46, iron-base marmem after annealing, there is anisotropy in its performance, on the basis that alloying constituent is optimized, emphasis is by improving the weave construction form of alloy, formation has directional properties enhanced tissue structure, this weave construction can make the shape memory of iron-base marmem, restoring force and intensity are enhanced.
The outstanding feature of iron-base marmem of the present invention is: the orientation of memory effect and excellent torsional deformation memory effect, for making spring shape shape memory alloy part, there is advantage, on other direction individual, the shape memory of material disappears, and in the other direction, shape memory strengthens.On the direction losing shape memory, material becomes hard brittle material, is not suitable for distortion, but the intensity of material and hardness improve, be applicable to doing high strength substrate material, therefore iron-base marmem of the present invention is the function alloy that differentiation appears in a kind of performance, and concrete advantage is as follows:
1. iron-base marmem of the present invention is one-way shape memory alloy, stable (100) plate texture is defined at material internal, the performance of ability is anisotropy, material shows as brittle rupture in perpendicular to the flexural deformation test in (100) texture face, does not have shape memory.
2. be configured to 15 ° ~ 75 ° direction bill of material and reveal good shape memory, restoring force and intensity, and stable performance.Repeated deformation more than 4 times all can ensure the response rate of more than 80%; Wherein with material when being configured to 30 ° repeatedly sex change four times after average response rate up to 89%, time at 45 ° with texture, the average response rate of material repeatedly after sex change four times is up to 92%, with the average response rate after material when being configured to 60 ° repeatedly sex change four times up to 90%.
3. in 75 ° ~ 90 ° angle directions, material shape memory performance improves further, but stability decreases, usual repeated deformation 3 times ~ 5 times, starts to occur fracture; Time in 90 ° with texture, the average response rate of material repeatedly after sex change three times is up to 91%.
4. under complex stress strained condition, (pure shear stress-strain) still can show good shape memory, and usual torsion(al)angle response rate is more than 75%, and torsion(al)angle response rate is up to 82%.
4. by reasonably designing the texture trend in this iron-base marmem, 30 ° ~ 60 ° directions will be become as operative orientation with texture plane, more excellent over-all properties can be shown, the raising of recovery of shape amount is greater than 30%, restoring force improves 17.5%, improves 53.4% along the deformation plance direction strength of materials.Material has good torsional deformation memory effect along specific function face (being parallel to compression set face), and torsion(al)angle response rate is more than 75%.
Embodiment
Embodiment one: alloying constituent and the mass percentage thereof of a kind of orientation iron-base marmem of present embodiment are: the Mn of 10% ~ 20%, the Si of 5.0% ~ 7.0%, 6.0% ~ 7.5% Cr, 0.5% ~ 1.0% Cu, be not more than the C of the 0.02% and Fe of surplus.
Embodiment two: present embodiment and embodiment one unlike: a kind of alloying constituent and mass percentage thereof of orientation iron-base marmem are: the Mn of 15%, the Si of 6.0%, 6.8% Cr, 0.5% ~ 1.0% Cu, be not more than the C of the 0.02% and Fe of surplus.Other steps and parameter identical with embodiment one.
Embodiment three: the preparation method of a kind of orientation iron-base marmem of present embodiment carries out according to the following steps:
One, A3 steel, electrolytic manganese, 75 ferrosilicon and ferrochrome are placed in medium-frequency induction furnace melting, smelting temperature is 1350 ~ 1450 DEG C, and 5min ~ 10min is incubated at temperature is 1350 ~ 1450 DEG C, then clay sand mold or water glass sand casting forming is adopted, foundry goods mold clearing temperature, not higher than 200 DEG C, obtains as cast condition iron-base marmem; Described A3 steel and the mass ratio of electrolytic manganese are 100:(21 ~ 25); Described A3 steel and the mass ratio of 75 ferrosilicon are 100:(10 ~ 14); Described A3 steel and the mass ratio of ferrochrome are 100:(15 ~ 19);
Two, as cast condition iron-base marmem step one obtained adopts wire cutting method to carry out mechanical workout, obtains blank;
Three, blank electric heat treating furnace step 2 obtained is to annealing, annealing temperature is 400 ~ 500 DEG C, annealing time is 8h ~ 12h, then carry out compression set, deformation rate 15% ~ 30% with pressing machine to the blank after annealing, rate of deformation is no more than 5mm/s, anneal again after distortion, annealing temperature is 600 ~ 800 DEG C, and annealing time is 2h ~ 3h, obtains orientation iron-base marmem.
The beneficial effect of present embodiment:
Present embodiment is in order to reach the comprehensive raising of FeMnSi system iron-base marmem performance, and take a set of new iron-base marmem preparation method, utilize castmethod synthesis iron base shape memory alloy, form as-cast structure, then casting residual stress is eliminated by annealing, make alloy structure homogenization of composition, pressing machine is adopted to carry out compression set to it again, obtain stable obvious deformation texture, and then carry out an anneal, after annealing, Brinell hardness is not higher than HB46, iron-base marmem after annealing, there is anisotropy in its performance, on the basis that alloying constituent is optimized, emphasis is by improving the weave construction form of alloy, formation has directional properties enhanced tissue structure, this weave construction can make the shape memory of iron-base marmem, restoring force and intensity are enhanced.
The outstanding feature of the iron-base marmem of present embodiment is: the orientation of memory effect and excellent torsional deformation memory effect, for making spring shape shape memory alloy part, there is advantage, on other direction individual, the shape memory of material disappears, and again on other directions, shape memory strengthens, in the mode losing shape memory, material becomes hard brittle material, be not suitable for distortion, but the intensity of material improves, be applicable to doing high-strength material, therefore iron-base marmem of the present invention is the function alloy that differentiation appears in a kind of performance, concrete advantage is as follows:
1. the iron-base marmem of present embodiment is one-way shape memory alloy, stable (100) plate texture is defined at material internal, the performance of ability is anisotropy, material shows as brittle rupture in perpendicular to the flexural deformation test in (100) texture face, does not have shape memory.
2. be configured to 15 ° ~ 75 ° direction bill of material and reveal good shape memory, restoring force and intensity, and stable performance repeated deformation more than 4 times all can ensure the response rate of more than 80%; Wherein with material when being configured to 30 ° repeatedly sex change four times after average response rate up to 89%, time at 45 ° with texture, the average response rate of material repeatedly after sex change four times is up to 92%, with the average response rate after material when being configured to 60 ° repeatedly sex change four times up to 90%.
3. in 75 ° ~ 90 ° angle directions, material shape memory performance improves further, but stability decreases, usual repeated deformation 3 times ~ 5 times, starts to occur fracture; Time in 90 ° with texture, the average response rate of material repeatedly after sex change three times is up to 91%.
4. under complex stress strained condition, (pure shear stress-strain) still can show good shape memory, and usual torsion(al)angle response rate is more than 75%, and torsion(al)angle response rate is up to 82%.
4. by reasonably designing the texture trend in this iron-base marmem, 30 ° ~ 60 ° directions will be become as operative orientation with texture plane, more excellent over-all properties can be shown, the raising of recovery of shape amount is greater than 30%, restoring force improves 17.5%, improves 53.4% along the deformation plance direction strength of materials.Material has good torsional deformation memory effect along specific function face (being parallel to compression set face), and torsion(al)angle response rate is more than 75%.
Embodiment four: present embodiment and embodiment three unlike: in the A3 steel described in step one, each composition and mass percentage thereof are: the Mn of 0.30% ~ 0.7%, the Si of 0.10% ~ 0.30%, the C of 0.10% ~ 0.20% and the Fe of surplus.Other steps and parameter identical with embodiment three.
Embodiment five: present embodiment and embodiment three or four unlike: in the electrolytic manganese described in step one, each composition and mass percentage thereof are: the Mn of 96% ~ 98%, the Si of 0.40% ~ 0.60%, the C of 0.05% ~ 0.15% and the Fe of surplus.Other steps and parameter identical with embodiment three or four.
Embodiment six: one of present embodiment and embodiment three to five unlike: in 75 ferrosilicon described in step one, each composition and mass percentage thereof are: the Fe of the Mn of 0.30% ~ 0.50%, the Si of 70% ~ 75%, the Cr of 0.20% ~ 0.40%, the C of 0.05% ~ 0.15% and surplus.Other steps and parameter identical with one of embodiment three to five.
Embodiment seven: one of present embodiment and embodiment three to six unlike: in the ferrochrome described in step one, each composition and mass percentage thereof are: the Si of 0.10% ~ 0.20%, the Cr of 55% ~ 65%, the C of 0.10% ~ 0.30% and the Fe of surplus.Other steps and parameter identical with one of embodiment three to six.
Embodiment eight: one of present embodiment and embodiment three to seven unlike: in the A3 steel described in step one, each composition and mass percentage thereof are: the Mn of 0.50%, the Si of 0.19%, the C of 0.16% and the Fe of surplus.Other steps and parameter identical with one of embodiment three to seven.
Embodiment nine: one of present embodiment and embodiment three to eight unlike: in the electrolytic manganese described in step one, each composition and mass percentage thereof are: the Mn of 97%, the Si of 0.50%, the C of 0.10% and the Fe of surplus.Other steps and parameter identical with one of embodiment three to eight.
Embodiment ten: one of present embodiment and embodiment three to nine unlike: in 75 ferrosilicon described in step one, each composition and mass percentage thereof are: the Fe of the Mn of 0.40%, the Si of 72%, the Cr of 0.30%, the C of 0.10% and surplus.Other steps and parameter identical with one of embodiment three to nine.
Embodiment 11: one of present embodiment and embodiment three to ten unlike: in the ferrochrome described in step one, each composition and mass percentage thereof are: the Si of 0.15%, the Cr of 60%, the C of 0.18% and the Fe of surplus.Other steps and parameter identical with one of embodiment three to ten.
Embodiment 12: one of present embodiment and embodiment three to ten one unlike: in step one, smelting temperature is 1400 DEG C, and is incubated 5min ~ 10min at temperature is 1400 DEG C.Other steps and parameter identical with one of embodiment three to ten one.
Embodiment 13: one of present embodiment and embodiment three to ten two unlike: the mass ratio of the A3 steel described in step one and electrolytic manganese is 100:23.3.Other steps and parameter identical with one of embodiment three to ten two.
Embodiment 14: one of present embodiment and embodiment three to ten three unlike: the mass ratio of the A3 steel described in step one and 75 ferrosilicon is 100:12.1.Other steps and parameter identical with one of embodiment three to ten three.
Embodiment 15: one of present embodiment and embodiment three to ten four unlike: the mass ratio of the A3 steel described in step one and ferrochrome is 100:17.4.Other steps and parameter identical with one of embodiment three to ten four.
Embodiment 16: one of present embodiment and embodiment three to ten five unlike: blank electric heat treating furnace step 2 obtained in step 3 is to annealing, and annealing temperature is 450 ~ 500 DEG C.Other steps and parameter identical with one of embodiment three to ten five.
Embodiment 17: one of present embodiment and embodiment three to ten six unlike: the deformation rate 15 ~ 25% described in step 3, described rate of deformation is 1mm/s ~ 5mm/s.Other steps and parameter identical with one of embodiment three to ten six.
Embodiment 18: one of present embodiment and embodiment three to ten seven unlike: anneal after being out of shape in step 3, annealing temperature is 600 ~ 650 DEG C again.Other steps and parameter identical with one of embodiment three to ten seven.
Beneficial effect of the present invention is verified by following examples:
Embodiment 1: alloying constituent and the mass percentage thereof of a kind of orientation iron-base marmem of the present embodiment are: the Mn of 15%, the Si of 6.0%, Cr, the Cu of 0.8% of 6.8%, the Fe of the C of 0.01% and surplus.
The preparation method of a kind of orientation iron-base marmem of the present embodiment carries out according to the following steps:
One, A3 steel, electrolytic manganese, 75 ferrosilicon and ferrochrome are placed in medium-frequency induction furnace melting, smelting temperature is 1400 DEG C, and is incubated 5min at temperature is 1400 DEG C, then adopts clay sand mold or water glass sand casting forming, foundry goods mold clearing temperature is 50 DEG C, obtains as cast condition iron-base marmem; Described A3 steel and the mass ratio of electrolytic manganese are 100:23.3; Described A3 steel and the mass ratio of 75 ferrosilicon are 100:12.1; Described A3 steel and the mass ratio of ferrochrome are 100:17.4;
Two, as cast condition iron-base marmem step one obtained adopts wire cutting method to carry out mechanical workout, obtains blank;
Three, blank electric heat treating furnace step 2 obtained is annealed, annealing temperature is 450 DEG C, annealing time is 10h, then carry out compression set with pressing machine to the blank after annealing, deformation rate is 20%, and rate of deformation is 5mm/s, anneal again after distortion, annealing temperature is 600 DEG C, and annealing time is 8h, obtains high response rate high-strength iron base marmem.
In A3 steel described in step one, each composition and mass percentage thereof are: the Mn of 0.50%, the Si of 0.19%, the C of 0.16% and the Fe of surplus;
In electrolytic manganese described in step one, each composition and mass percentage thereof are: the Mn of 97%, the Si of 0.50%, the C of 0.10% and the Fe of surplus;
In 75 ferrosilicon described in step one, each composition and mass percentage thereof are: the Fe of the Mn of 0.40%, the Si of 72%, the Cr of 0.30%, the C of 0.10% and surplus;
In ferrochrome described in step one, each composition and mass percentage thereof are: the Si of 0.15%, the Cr of 60%, the C of 0.18% and the Fe of surplus.
The alloying constituent of the high response rate high-strength iron base marmem that step 3 obtains and mass percentage thereof are: the Mn of 15%, the Si of 6.0%, 6.8% Cr, 0.5% ~ 1.0% Cu, be not more than the C of the 0.02% and Fe of surplus.
Annealing time described in step 3 is determined according to the thickness of thermal treatment process principle by blank;
Shape-memory properties test is carried out to the high response rate high-strength iron base marmem of the present embodiment:
(1) single bend test: in order to prevent temperature and stress influence in the course of processing, adopts wire cutting method to make.
Pliability test sample is that 0.5mm × 5mm × 50mm adopts line sheet specimens, and the angle of bend of pliability test is no more than 30 °.
Conclusion: in table 1, the iron-base marmem of the present embodiment is one way memory alloy as can be seen from Table 1, after technological process of the present invention, material internal defines stable (100) plate texture, the performance of ability is anisotropy, material shows as brittle rupture in perpendicular to the flexural deformation test in (100) texture face, not there is shape memory, and be parallel to texture face and becoming with texture face the direction of 30 ° ~ 60 ° to show excellent shape memory effect, by repeatedly pliability test, on the direction of 30 ° ~ 60 °, the shape of material connects the shape recovery rate of effect far above current existing iron-base marmem, be embodied in material when being configured to 30 ° repeatedly sex change four times after average response rate up to 89%, time at 45 ° with texture, the average response rate of material repeatedly after sex change four times is up to 92%, with the average response rate after material when being configured to 60 ° repeatedly sex change four times up to 90%, average response rate time in 90 ° with texture after material repeated deformation three times is up to 91%.
The reply of table 1 iron-base marmem on different angles direction (600 DEG C)
(2) twisting test: in order to prevent temperature and stress influence in the course of processing, adopts wire cutting method to make.
Twisting test sample is 0.5mm × 5mm × 50mm rectangular parallelepiped sample, and the windup-degree of twisting test is no more than 15 °.
Conclusion: in table 2, the iron-base marmem of the present embodiment is one-way shape memory alloy as can be seen from Table 2, after technological process of the present invention, under complex stress strained condition, (pure shear stress-strain) still can show good shape memory, usual torsion(al)angle response rate is more than 75%, and torsion(al)angle response rate is up to 82%.
Table 2 iron-base marmem twisted shapes memory response rate (600 DEG C)
Claims (10)
1. an orientation iron-base marmem, is characterized in that a kind of alloying constituent of orientation iron-base marmem and mass percentage thereof are: the Mn of 10% ~ 20%, the Si of 5.0% ~ 7.0%, 6.0% ~ 7.5% Cr, 0.5% ~ 1.0% Cu, be not more than the C of the 0.02% and Fe of surplus.
2. a kind of orientation iron-base marmem according to claim 1, is characterized in that a kind of alloying constituent of orientation iron-base marmem and mass percentage thereof are: the Mn of 15%, the Si of 6.0%, 6.8% Cr, 0.5% ~ 1.0% Cu, be not more than the C of the 0.02% and Fe of surplus.
3. a preparation method for orientation iron-base marmem, is characterized in that a kind of preparation method of orientation iron-base marmem carries out according to the following steps:
One, A3 steel, electrolytic manganese, 75 ferrosilicon and ferrochrome are placed in medium-frequency induction furnace melting, smelting temperature is 1350 ~ 1450 DEG C, and 5min ~ 10min is incubated at temperature is 1350 ~ 1450 DEG C, then clay sand mold or water glass sand casting forming is adopted, foundry goods mold clearing temperature, not higher than 200 DEG C, obtains as cast condition iron-base marmem; Described A3 steel and the mass ratio of electrolytic manganese are 100:(21 ~ 25); Described A3 steel and the mass ratio of 75 ferrosilicon are 100:(10 ~ 14); Described A3 steel and the mass ratio of ferrochrome are 100:(15 ~ 19);
Two, as cast condition iron-base marmem step one obtained adopts wire cutting method to carry out mechanical workout, obtains blank;
Three, blank electric heat treating furnace step 2 obtained is to annealing, annealing temperature is 400 ~ 500 DEG C, annealing time is 8h ~ 12h, then carry out compression set, deformation rate 15% ~ 30% with pressing machine to the blank after annealing, rate of deformation is no more than 5mm/s, anneal again after distortion, annealing temperature is 600 ~ 800 DEG C, and annealing time is 2h ~ 3h, obtains orientation iron-base marmem.
4. the preparation method of a kind of orientation iron-base marmem according to claim 3, it is characterized in that in the A3 steel described in step one, each composition and mass percentage thereof are: the Mn of 0.30% ~ 0.7%, the Si of 0.10% ~ 0.30%, the C of 0.10% ~ the 0.20% and Fe of surplus, in described electrolytic manganese, each composition and mass percentage thereof are: the Mn of 96% ~ 98%, the Si of 0.40% ~ 0.60%, the C of 0.05% ~ the 0.15% and Fe of surplus, in 75 described ferrosilicon, each composition and mass percentage thereof are: the Mn of 0.30% ~ 0.50%, the Si of 70% ~ 75%, the Cr of 0.20% ~ 0.40%, the C of 0.05% ~ the 0.15% and Fe of surplus, in described ferrochrome, each composition and mass percentage thereof are: the Si of 0.10% ~ 0.20%, the Cr of 55% ~ 65%, the C of 0.10% ~ the 0.30% and Fe of surplus.
5. the preparation method of a kind of orientation iron-base marmem according to claim 3, it is characterized in that in the A3 steel described in step one, each composition and mass percentage thereof are: the Mn of 0.50%, the Si of 0.19%, the C of the 0.16% and Fe of surplus, in described electrolytic manganese, each composition and mass percentage thereof are: the Mn of 97%, the Si of 0.50%, the C of the 0.10% and Fe of surplus, in 75 described ferrosilicon, each composition and mass percentage thereof are: the Mn of 0.40%, the Si of 72%, the Cr of 0.30%, the C of the 0.10% and Fe of surplus, in described ferrochrome, each composition and mass percentage thereof are: the Si of 0.15%, the Cr of 60%, the C of the 0.18% and Fe of surplus.
6. the preparation method of a kind of orientation iron-base marmem according to claim 3, is characterized in that in step one, smelting temperature is 1400 DEG C, and be incubated 5min ~ 10min at temperature is 1400 DEG C.
7. the preparation method of a kind of orientation iron-base marmem according to claim 3, it is characterized in that the mass ratio of the A3 steel described in step one and electrolytic manganese is 100:23.3, described A3 steel and the mass ratio of 75 ferrosilicon are 100:12.1, and described A3 steel and the mass ratio of ferrochrome are 100:17.4.
8. the preparation method of a kind of orientation iron-base marmem according to claim 3, it is characterized in that blank electric heat treating furnace step 2 obtained in step 3 is to annealing, annealing temperature is 450 ~ 500 DEG C.
9. the preparation method of a kind of orientation iron-base marmem according to claim 3, is characterized in that the deformation rate 15 ~ 25% described in step 3, and described rate of deformation is 1mm/s ~ 5mm/s.
10. the preparation method of a kind of orientation iron-base marmem according to claim 3, it is characterized in that annealing after distortion in step 3, annealing temperature is 600 ~ 650 DEG C again.
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| EP0176272A1 (en) * | 1984-09-07 | 1986-04-02 | Nippon Steel Corporation | Shape memory alloy and method for producing the same |
| JPH02221321A (en) * | 1989-02-21 | 1990-09-04 | Nkk Corp | Production of iron-base shape memory alloy |
| CN1752257A (en) * | 2005-10-08 | 2006-03-29 | 四川大学 | Method for preparing micron crystal iron base marmen blocks |
| CN101748345A (en) * | 2008-12-04 | 2010-06-23 | 大同特殊钢株式会社 | two-way shape-recovery alloy |
| CN103866211A (en) * | 2014-03-19 | 2014-06-18 | 四川大学 | Method of preparing training-free iron-manganese-silicon-based shape memory alloy |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0176272A1 (en) * | 1984-09-07 | 1986-04-02 | Nippon Steel Corporation | Shape memory alloy and method for producing the same |
| JPH02221321A (en) * | 1989-02-21 | 1990-09-04 | Nkk Corp | Production of iron-base shape memory alloy |
| CN1752257A (en) * | 2005-10-08 | 2006-03-29 | 四川大学 | Method for preparing micron crystal iron base marmen blocks |
| CN101748345A (en) * | 2008-12-04 | 2010-06-23 | 大同特殊钢株式会社 | two-way shape-recovery alloy |
| CN103866211A (en) * | 2014-03-19 | 2014-06-18 | 四川大学 | Method of preparing training-free iron-manganese-silicon-based shape memory alloy |
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