CN101665894A - Heat-treatment method and equipment for nickel-titanium shape memory alloy - Google Patents
Heat-treatment method and equipment for nickel-titanium shape memory alloy Download PDFInfo
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- CN101665894A CN101665894A CN200910204532A CN200910204532A CN101665894A CN 101665894 A CN101665894 A CN 101665894A CN 200910204532 A CN200910204532 A CN 200910204532A CN 200910204532 A CN200910204532 A CN 200910204532A CN 101665894 A CN101665894 A CN 101665894A
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Abstract
The invention provides a heat-treatment method and an equipment for nickel-titanium shape memory alloy, relating to a method for preparing nickel-titanium shape memory alloy wire with functional continuous gradients. The method comprises the steps of preheating the nickel-titanium shape memory alloy wire, placing the nickel-titanium shape memory wire in a tuner pyrosphere of a high-frequency induction heating machine which forms continuous heating temperature with different temperature gradients due to gradual change of fire of the pyrosphere, heating, keeping temperature and annealing for a specified time. The equipment is characterized in that a plurality of tuner pyrospheres of the high-frequency induction heating machine are assembled into a pyrisphere group coaxially; all pyrispheresare gradually equidifferent to form the heating temperature of continuous different temperature gradients. Alternatively, the tuner pyrosphere of the high-frequency induction heating machine is enwound as spiral coils; and the alloy wire is heated under continuous different temperature gradients by the gradual change of pyrosphere diameter or pyrosphere pitch or the combination of the diameter andthe pitch. The heat-treatment equipment is special, simple, convenient and practical, the process step is few, the time is short, the efficiency is high, and the heat-treatment equipment is applicable to the production and application of high-class nickel-titanium shape memory alloy glasses frame part.
Description
Technical field
The present invention relates to the heat treating method and the equipment of nickel-titanium shape memory alloy.The nickel-titanium shape memory alloy wire rod that relates to preparation function continuous gradient.
Background technology
Nickel-titanium shape memory alloy has good shape memory effect and super-elasticity, and along with now and following widespread use at many industry fields, other function specificity of nickel-titanium shape memory alloy also has very big research and development demand.Particularly at the industry field that nickel-titanium shape memory alloy is had the function specificity require, such as space flight and aviation intelligent element, medicine equipment, instrument, high-grade frame parts.Since nickel-titanium shape memory alloy is as a kind of functional materials, its function continuous gradient performance is the specific great development application direction of its function.
In the high-grade titanium material spectacle frame, the application of nickel-titanium shape memory alloy has had demand very much.Because nickel-titanium shape memory alloy is passing through to after making it have shape memory effect and hyperelastic processing, the plasticity-of its rolling processing is relatively poor, thereby when making the frame parts, such as when making the glass foot from village head to the glass foot tail of an integral body, the position that has needs punching die to mold the technology style, the position that has needs rolling processing and goes out further super-elasticity, the position that other has then needs to bend, and the nickel-titanium shape memory alloy of existing homogeneous materials can't satisfy product requirement.In the example of some products, iff being to have the position that needs to change plasticity or the like rolling processing performance to do common simple spot anneling processing, can't obtain and show the superiority of the shape memory alloy material of product to the nickel-titanium shape memory alloy wire rod.By researching and developing the nickel-titanium shape memory alloy wire rod that new thermal processing equipment obtains the function continuous gradient, then can be implemented in the position that has on the same integral product parts and can realize complicated technology style by complicated viscous deformation, and the performance of its super-elasticity or the like shape memory alloy material is excessively to arrive other position by continuous gradient, thereby produces excellent function specificity.In addition, the nickel-titanium shape memory alloy wire rod of function continuous gradient can also produce and comprise a lot of other the special shape memory alloy material functions of special function continuous gradient shape memory effect or the like.
The example of above-mentioned making glass foot, because the nickel-titanium shape memory alloy gauge or diameter of wire that need handle is little, length is short, particularly when need handle be the local segment of nickel-titanium shape memory alloy wire rod the time, if utilize existing heat treating method and processing unit, such as with existing common heating furnace in stove internal heating, insulation, can't realize that then the differential temperature gradient of alloy wire is heated, is incubated; Also can't realize with existing HF induction heating apparatus.
Summary of the invention
The object of the present invention is to provide a kind of processing unit simple, cost is low, the heat treating method and the equipment of the nickel-titanium shape memory alloy wire rod of the preparation function continuous gradient that efficient is high.
One of technical scheme of the present invention is:
Be used to prepare the heat treating method of function continuous gradient nickel-titanium shape memory alloy wire rod, may further comprise the steps and processing condition: (one) with diameter is
0.6～
4.0mm the atomic ratio that contains Ni is that 51.0～55.0% nickel-titanium shape memory alloy wire rod evenly is preheated to about 250 ℃～300 ℃ of temperature; (2) closely compose and lay out into tuner pyrosphere group by what a plurality of each tuner pyrosphere that the high-frequency induction heating machine of firepower can independently be set respectively of at least three became concentric, these a plurality of tuner pyrospheres of at least three are configured to the Heating temperature of continuous differential temperature gradient to the nickel-titanium shape memory alloy wire rod, high temperature pyrosphere Heating temperature is arranged on 600 ℃～650 ℃, low temperature pyrosphere Heating temperature is arranged on 250 ℃～300 ℃, the orderly equal difference step by step of all the other pyrosphere Heating temperatures is arranged to continuous differential temperature gradient, place described tuner pyrosphere group to carry out continuous differential temperature gradient-heated in pending section of nickel-titanium shape memory alloy wire rod, continuously the differential temperature gradient-heated along nickel-titanium shape memory alloy wire rod length direction, the time of insulation is 1～10 minute; (3) annealing is taken out the nickel-titanium shape memory alloy wire rod from the tuner pyrosphere, and hardening is cooled to room temperature immediately, promptly obtains function continuous gradient nickel-titanium shape memory alloy.
Wherein, in the described step (two), the tuner pyrosphere respectively encloses into the dip-parallel setting of 20 °～40 ° of angles, and continuous its continuity of differential temperature gradient-heated temperature that the tuner pyrosphere is realized is better.
In this scheme, be used to prepare the Equipment for Heating Processing of function continuous gradient nickel-titanium shape memory alloy wire rod, mainly form by the tuner pyrosphere and the pilot circuit of a plurality of high-frequency induction heating machines, what its a plurality of each tuner pyrospheres that the high-frequency induction heating machine of firepower can independently be set respectively by at least three became concentric closely composes and lay out into tuner pyrosphere group, one pilot circuit comprises the trip switch of the Push And Release that can unify to control described at least three a plurality of its whole its firepower of tuner pyrosphere at least, and these a plurality of tuner pyrospheres of at least three are configured to the orderly Heating temperature to the nickel-titanium shape memory alloy wire rod of differential temperature gradient continuously step by step when the nickel-titanium shape memory alloy wire rod being carried out continuous differential temperature gradient-heated.
Wherein, described tuner pyrosphere respectively encloses into the dip-parallel setting of 20 °～40 ° of angles, and continuous its continuity of differential temperature gradient-heated temperature that the tuner pyrosphere is realized is better.
Two of technical scheme of the present invention is:
Be used to prepare the heat treating method of function continuous gradient nickel-titanium shape memory alloy wire rod, may further comprise the steps and processing condition: (one) with diameter is
0.6～
4.0mm the atomic ratio that contains Ni is that 51.0～55.0% nickel-titanium shape memory alloy wire rod evenly is preheated to about 250 ℃～300 ℃ of temperature; (2) one high-frequency induction heating machines, the multi-turn of helically wound at least three circles of its tuner pyrosphere, the diameter of pyrosphere passes through gradually from small to large, perhaps to taper to two ends circle portion diameter for a short time from mesosphere portion diameter big for the diameter of pyrosphere, it is that the temperature that high-temperature portion heats is 600 ℃～650 ℃ that its sample by pending nickel-titanium shape memory alloy wire rod records its pyrosphere portion at minor diameter, and be that the temperature of low-temp. portion heating is 250 ℃～300 ℃ in large diameter pyrosphere portion, the gradual change of pyrosphere diameter forms the continuous differential temperature gradient-heated temperature to alloy wire, place described tuner pyrosphere to carry out continuous differential temperature gradient-heated in pending section of nickel-titanium shape memory alloy wire rod, continuously the differential temperature gradient-heated along nickel-titanium shape memory alloy wire rod length direction, the time of insulation is 1～10 minute; (3) annealing is taken out the nickel-titanium shape memory alloy wire rod from the tuner pyrosphere, and hardening is cooled to room temperature immediately, promptly obtains function continuous gradient nickel-titanium shape memory alloy.
Under this technical scheme, be used to prepare the Equipment for Heating Processing of function continuous gradient nickel-titanium shape memory alloy wire rod, comprise a high-frequency induction heating machine and its tuner pyrosphere, the multi-turn of helically wound at least three circles of its tuner pyrosphere, the diameter of pyrosphere passes through gradually from small to large, perhaps to taper to two ends circle portion diameter for a short time from mesosphere portion diameter big for the diameter of pyrosphere, its sample by pending nickel-titanium shape memory alloy wire rod records its pyrosphere portion at minor diameter becomes a heat portion, and becoming a low-temperature heat portion in large diameter pyrosphere portion, the Diameter Gradual Change of pyrosphere forms the continuous differential temperature gradient-heated temperature to alloy wire.
Three of technical scheme of the present invention is:
Be used to prepare the heat treating method of function continuous gradient nickel-titanium shape memory alloy wire rod, may further comprise the steps and processing condition: (one) with diameter is
0.6～
4.0mm the atomic ratio that contains Ni is that 51.0～55.0% nickel-titanium shape memory alloy wire rod evenly is preheated to about 250 ℃～300 ℃ of temperature; (2) one high-frequency induction heating machines, the multi-turn of helically wound at least three circles of its tuner pyrosphere, the pitch of pyrosphere spiral passes through gradually from small to large, perhaps the pitch of pyrosphere spiral to taper to two ends circle portion pitch for a short time from mesosphere portion pitch big, it is that the temperature that high-temperature portion heats is 600 ℃～650 ℃ that its sample by pending nickel-titanium shape memory alloy wire rod records its pyrosphere portion at fine pith, and be that the temperature of low-temp. portion heating is 250 ℃～300 ℃ in the pyrosphere portion of coarse pitch, the gradual change of the pitch of pyrosphere spiral forms the continuous differential temperature gradient-heated temperature to alloy wire, place described tuner pyrosphere to carry out continuous differential temperature gradient-heated in pending section of nickel-titanium shape memory alloy wire rod, continuously the differential temperature gradient-heated along nickel-titanium shape memory alloy wire rod length direction, the time of insulation is 1～10 minute; (3) annealing is taken out the nickel-titanium shape memory alloy wire rod from the tuner pyrosphere, and hardening is cooled to room temperature immediately, promptly obtains function continuous gradient nickel-titanium shape memory alloy.
Under this third technical scheme, be used to prepare the Equipment for Heating Processing of function continuous gradient nickel-titanium shape memory alloy wire rod, also comprise a high-frequency induction heating machine and its tuner pyrosphere as mentioned above, its difference is: the multi-turn of helically wound at least three circles of its tuner pyrosphere, the pitch of pyrosphere spiral passes through gradually from small to large, perhaps the pitch of pyrosphere spiral to taper to two ends circle portion pitch for a short time from mesosphere portion pitch big, its sample by pending nickel-titanium shape memory alloy wire rod records its pyrosphere portion at fine pith becomes a high-temperature portion, and becoming a low-temp. portion in the pyrosphere portion of coarse pitch, the gradual change of the pitch of pyrosphere spiral forms the continuous differential temperature gradient-heated temperature to alloy wire.
By the technical scheme of the invention described above two and the combination of three Equipment for Heating Processing, a kind of Equipment for Heating Processing that is used to prepare function continuous gradient nickel-titanium shape memory alloy wire rod that can draw, it is characterized in that: the pitch of pyrosphere spiral passes through gradually from small to large, and the diameter of pyrosphere also in the same way pass through gradually from small to large from; Perhaps the pitch of pyrosphere spiral to taper to two ends circle portion pitch for a short time from mesosphere portion pitch big, and the diameter of pyrosphere also to taper to two ends circle portion diameter for a short time from mesosphere portion diameter big.The gradual change bonded of the diameter of pyrosphere and screw pitch has formed continuity better to the continuous differential temperature gradient-heated temperature of alloy wire.
The present invention, its Equipment for Heating Processing can be formed by the improvement of the material low cost of existing installation, and its process is few, fugitive rate height of time, the cost of equipment and technology is low, is suitable for production application.By Equipment for Heating Processing of the present invention and technology,, can realize preparing the nickel-titanium shape memory alloy wire rod of different function continuous gradients according to different function specificity requirements by easy adjusting to technology and equipment.
Description of drawings
Fig. 1, Fig. 2 are the continuous differential temperature gradient-heated principle schematic of nickel-titanium shape memory alloy wire rod of the present invention.
Fig. 3, Fig. 4 are the High-frequency machine pyrosphere group synoptic diagram that the present invention executes example one.
Fig. 5, Fig. 6 are the High-frequency machine pyrosphere synoptic diagram that the present invention executes example two.
Fig. 7, Fig. 8 are the High-frequency machine pyrosphere synoptic diagram that the present invention executes example three.
Fig. 9, Figure 10 are the High-frequency machine pyrosphere synoptic diagram that the present invention executes example four.
Specific embodiment
Embodiment one:
The heat treating method of present embodiment may further comprise the steps and processing condition: (one), be with diameter
0.6～
4.0mm the atomic ratio that contains Ni is that 51.0～55.0% nickel-titanium shape memory alloy wire rod evenly is preheated to about 250 ℃～300 ℃ of temperature.(2), as shown in Figure 3, closely compose and lay out into tuner pyrosphere group by 201 one-tenth concentrics of each tuner pyrosphere of 5 high-frequency induction heating machines that firepower can independently be set respectively.5 tuner pyrospheres are configured to the Heating temperature of continuous differential temperature gradient to the nickel-titanium shape memory alloy wire rod, high temperature pyrosphere Heating temperature is arranged on 600 ℃～650 ℃, low temperature pyrosphere Heating temperature is arranged on 250 ℃～300 ℃, and the orderly equal difference step by step of all the other pyrosphere Heating temperatures is arranged to continuous differential temperature gradient.Be made as 620 ℃ such as the high temperature pyrosphere that is positioned at bottom, all the other 4 pyrospheres are made as the temperature difference step by step that respectively differs 80 ℃, and low temperature pyrosphere extremely topmost is 300 ℃.As shown in Figure 3, place for pending section 100 described tuner pyrosphere group to carry out continuous differential temperature gradient-heated along nickel-titanium shape memory alloy wire rod length direction in the nickel-titanium shape memory alloy wire rod, the time of heating, insulation is 1～10 minute.(3) annealing is taken out the nickel-titanium shape memory alloy wire rod from the tuner pyrosphere, and hardening is cooled to room temperature immediately.Promptly obtain function continuous gradient nickel-titanium shape memory alloy.
Wherein, in the described step (two), as shown in Figure 4, when the dip-parallel that 5 tuner pyrospheres are respectively enclosed into 20 °～40 ° of angles is provided with, continuous its continuity of differential temperature gradient-heated temperature that the tuner pyrosphere is realized than aforementioned better.
Continuous differential temperature gradient-heated principle schematic in conjunction with as shown in Figure 1 and Figure 2 nickel-titanium shape memory alloy wire rod of the present invention, can appreciate that the nickel-titanium shape memory alloy wire rod is along its length, its heating, insulation are formed with high temperature section, transition and low-temperature zone, and wherein transition is continuous differential temperature gradient.In the described step (two), it can be that the pyrosphere that high temperature is gradient to the other end is a low temperature from the pyrosphere of an end, also can be that pyrosphere from pars intermedia is that the pyrosphere that high temperature is gradient to two ends is a low temperature.The thermal treatment result of present embodiment records the nickel-titanium shape memory alloy wire rod and has produced hardness, plasticity-and super-elasticity continuous function gradient from processed high temperature section to low-temperature zone.
Equipment for Heating Processing in the present embodiment, mainly form by the tuner pyrosphere and the pilot circuit of a plurality of high-frequency induction heating machines, show as Fig. 3, closely compose and lay out into tuner pyrosphere group by 201 one-tenth concentrics of each tuner pyrosphere of 5 high-frequency induction heating machines that firepower can independently be set respectively, by a pilot circuit control that comprises the Push And Release of 5 tuner pyrosphere firepower of unified control at least, 5 tuner pyrospheres are configured to the orderly Heating temperature of differential temperature gradient continuously step by step when the nickel-titanium shape memory alloy wire rod being carried out continuous differential temperature gradient-heated.
Wherein, described tuner pyrosphere respectively encloses into the dip-parallel setting of 20 °～40 ° of angles, and continuous its continuity of differential temperature gradient-heated temperature that the tuner pyrosphere is realized is better than aforementioned.
Embodiment two:
What its step and processing condition and embodiment one were different is, step (two) is: by the helically wound multi-turn of its tuner pyrosphere of a high-frequency induction heating machine, the diameter of pyrosphere 202 passes through gradually from small to large (as shown in Figure 5), perhaps the diameter of pyrosphere 203 tapers to two ends circle portion diameter big (as shown in Figure 6) for a short time from mesosphere portion diameter, it is that the temperature that high-temperature portion heats is 600 ℃～650 ℃ that its sample by pending nickel-titanium shape memory alloy wire rod records its pyrosphere portion at minor diameter, and be that the temperature of low-temp. portion heating is 250 ℃～300 ℃ in large diameter pyrosphere portion, the gradual change of pyrosphere diameter forms the continuous differential temperature gradient-heated temperature to alloy wire, place described tuner pyrosphere to carry out continuous differential temperature gradient-heated along nickel-titanium shape memory alloy wire rod length direction, differential temperature gradient-heated continuously pending section of nickel-titanium shape memory alloy wire rod (as shown in Figure 5 100), the time of insulation is 1～10 minute.Other step is identical with example one.
The Equipment for Heating Processing of embodiment two, comprise a high-frequency induction heating machine and its tuner pyrosphere, the multi-turn of helically wound at least three circles of its tuner pyrosphere, the diameter of pyrosphere passes through gradually from small to large, perhaps to taper to two ends circle portion diameter for a short time from mesosphere portion diameter big for the diameter of pyrosphere, its sample by pending nickel-titanium shape memory alloy wire rod records its pyrosphere portion at minor diameter becomes a heat portion, and becoming a low-temperature heat portion in large diameter pyrosphere portion, the Diameter Gradual Change of pyrosphere forms the continuous differential temperature gradient-heated temperature to alloy wire.
Embodiment three:
What its step and processing condition and embodiment one were different is, step (two) is: by a high-frequency induction heating machine, the multi-turn of helically wound at least three circles of its tuner pyrosphere, the pitch of pyrosphere spiral 204 passes through gradually from small to large (as shown in Figure 7), perhaps the pitch of pyrosphere spiral 205 tapers to two ends circle portion pitch big (as shown in Figure 8) for a short time from mesosphere portion pitch, it is that the temperature that high-temperature portion heats is 600 ℃～650 ℃ that its sample by pending nickel-titanium shape memory alloy wire rod records its pyrosphere portion at fine pith, and be that the temperature of low-temp. portion heating is 250 ℃～300 ℃ in the pyrosphere portion of coarse pitch, the gradual change of the pitch of pyrosphere spiral forms the continuous differential temperature gradient-heated temperature to alloy wire, place described tuner pyrosphere to carry out continuous differential temperature gradient-heated in pending section of nickel-titanium shape memory alloy wire rod, continuously the differential temperature gradient-heated along nickel-titanium shape memory alloy wire rod length direction, the time of insulation is 1～10 minute.Other step is identical with example one.
The Equipment for Heating Processing of embodiment three, the multi-turn of helically wound at least three circles of its tuner pyrosphere, the pitch of pyrosphere spiral passes through gradually from small to large, perhaps the pitch of pyrosphere spiral to taper to two ends circle portion pitch for a short time from mesosphere portion pitch big, its sample by pending nickel-titanium shape memory alloy wire rod records its pyrosphere portion at fine pith becomes a high-temperature portion, and becoming a low-temp. portion in the pyrosphere portion of coarse pitch, the gradual change of the pitch of pyrosphere spiral forms the continuous differential temperature gradient-heated temperature to alloy wire.
Embodiment four:
Combination by the Equipment for Heating Processing of the foregoing description two and embodiment three, and a kind of Equipment for Heating Processing that is used to prepare function continuous gradient nickel-titanium shape memory alloy wire rod that draws, be characterized in: the pitch of pyrosphere spiral 206 passes through gradually from small to large, and also passing through gradually from small to large from (as shown in Figure 9) in the same way of the diameter of pyrosphere; Perhaps the pitch of pyrosphere spiral 207 to taper to two ends circle portion pitch for a short time from mesosphere portion pitch big, and the diameter of pyrosphere also tapers to two ends circle portion diameter big (as shown in figure 10) for a short time from mesosphere portion diameter.The gradual change bonded of the diameter of pyrosphere and screw pitch has formed continuity better to the continuous differential temperature gradient-heated temperature of alloy wire.By the Equipment for Heating Processing of present embodiment four, continuous differential temperature gradient-heated, heat preservation effect the best of realization to the nickel-titanium shape memory alloy wire rod.
Claims (9)
1, a kind of heat treating method of nickel-titanium shape memory alloy is used to prepare function continuous gradient nickel-titanium shape memory alloy wire rod, and it is characterized in that may further comprise the steps and processing condition: (one) with diameter is
The atomic ratio that contains Ni is that 51.0～55.0% nickel-titanium shape memory alloy wire rod evenly is preheated to about 250 ℃～300 ℃ of temperature; (2) closely compose and lay out into tuner pyrosphere group by what a plurality of each tuner pyrosphere that the high-frequency induction heating machine of firepower can independently be set respectively of at least three became concentric, these a plurality of tuner pyrospheres of at least three are configured to the Heating temperature of continuous differential temperature gradient to the nickel-titanium shape memory alloy wire rod, high temperature pyrosphere Heating temperature is arranged on 600 ℃～650 ℃, low temperature pyrosphere Heating temperature is arranged on 250 ℃～300 ℃, the orderly equal difference step by step of all the other pyrosphere Heating temperatures is arranged to continuous differential temperature gradient, place described tuner pyrosphere group to carry out continuous differential temperature gradient-heated in pending section of nickel-titanium shape memory alloy wire rod, continuously the differential temperature gradient-heated along nickel-titanium shape memory alloy wire rod length direction, the time of insulation is 1～10 minute; (3) annealing is taken out the nickel-titanium shape memory alloy wire rod from the tuner pyrosphere, and hardening is cooled to room temperature immediately, promptly obtains function continuous gradient nickel-titanium shape memory alloy.
2, the heat treating method of a kind of nickel-titanium shape memory alloy according to claim 1 is characterized in that: in the described step (two), the tuner pyrosphere respectively encloses into the dip-parallel setting of 20 °～40 ° of angles.
3, a kind of Equipment for Heating Processing that is used to prepare function continuous gradient nickel-titanium shape memory alloy wire rod, mainly form by the tuner pyrosphere and the pilot circuit of a plurality of high-frequency induction heating machines, it is characterized in that: closely compose and lay out into tuner pyrosphere group by what a plurality of each tuner pyrosphere that the high-frequency induction heating machine of firepower can independently be set respectively of at least three became concentric, one pilot circuit comprises the trip switch of the Push And Release that can unify to control described at least three a plurality of its whole its firepower of tuner pyrosphere entirely less, and these a plurality of tuner pyrospheres of at least three are configured to the orderly Heating temperature to the nickel-titanium shape memory alloy wire rod of differential temperature gradient continuously step by step when the nickel-titanium shape memory alloy wire rod being carried out continuous differential temperature gradient-heated.
4, a kind of Equipment for Heating Processing that is used to prepare function continuous gradient nickel-titanium shape memory alloy wire rod according to claim 3, it is characterized in that: described tuner pyrosphere respectively encloses into the dip-parallel setting of 20 °～40 ° of angles.
5, a kind of heat treating method of nickel-titanium shape memory alloy is used to prepare function continuous gradient nickel-titanium shape memory alloy wire rod, and it is characterized in that may further comprise the steps and processing condition: (one) with diameter is
The atomic ratio that contains Ni is that 51.0～55.0% nickel-titanium shape memory alloy wire rod evenly is preheated to about 250 ℃～300 ℃ of temperature; (2) one high-frequency induction heating machines, the multi-turn of helically wound at least three circles of its tuner pyrosphere, the diameter of pyrosphere passes through gradually from small to large, perhaps to taper to two ends circle portion diameter for a short time from mesosphere portion diameter big for the diameter of pyrosphere, it is that the temperature that high-temperature portion heats is 600 ℃～650 ℃ that its sample by pending nickel-titanium shape memory alloy wire rod records its pyrosphere portion at minor diameter, and be that the temperature of low-temp. portion heating is 250 ℃～300 ℃ in large diameter pyrosphere portion, the gradual change of pyrosphere diameter forms the continuous differential temperature gradient-heated temperature to alloy wire, place described tuner pyrosphere to carry out continuous differential temperature gradient-heated in pending section of nickel-titanium shape memory alloy wire rod, continuously the differential temperature gradient-heated along nickel-titanium shape memory alloy wire rod length direction, the time of insulation is 1～10 minute; (3) annealing is taken out the nickel-titanium shape memory alloy wire rod from the tuner pyrosphere, and hardening is cooled to room temperature immediately, promptly obtains function continuous gradient nickel-titanium shape memory alloy.
6, a kind of Equipment for Heating Processing that is used to prepare function continuous gradient nickel-titanium shape memory alloy wire rod, comprise a high-frequency induction heating machine and its tuner pyrosphere, it is characterized in that: the multi-turn of helically wound at least three circles of its tuner pyrosphere, the diameter of pyrosphere passes through gradually from small to large, perhaps to taper to two ends circle portion diameter for a short time from mesosphere portion diameter big for the diameter of pyrosphere, its sample by pending nickel-titanium shape memory alloy wire rod records its pyrosphere portion at minor diameter becomes a heat portion, and becoming a low-temperature heat portion in large diameter pyrosphere portion, the Diameter Gradual Change of pyrosphere forms the continuous differential temperature gradient-heated temperature to alloy wire.
7, a kind of heat treating method of nickel-titanium shape memory alloy is used to prepare function continuous gradient nickel-titanium shape memory alloy wire rod, and it is characterized in that may further comprise the steps and processing condition: (one) with diameter is
The atomic ratio that contains Ni is that 51.0～55.0% nickel-titanium shape memory alloy wire rod evenly is preheated to about 250 ℃～300 ℃ of temperature; (2) one high-frequency induction heating machines, the multi-turn of helically wound at least three circles of its tuner pyrosphere, the pitch of pyrosphere spiral passes through gradually from small to large, perhaps the pitch of pyrosphere spiral to taper to two ends circle portion pitch for a short time from mesosphere portion pitch big, it is that the temperature that high-temperature portion heats is 600 ℃～650 ℃ that its sample by pending nickel-titanium shape memory alloy wire rod records its pyrosphere portion at fine pith, and be that the temperature of low-temp. portion heating is 250 ℃～300 ℃ in the pyrosphere portion of coarse pitch, the gradual change of the pitch of pyrosphere spiral forms the continuous differential temperature gradient-heated temperature to alloy wire, place described tuner pyrosphere to carry out continuous differential temperature gradient-heated in pending section of nickel-titanium shape memory alloy wire rod, continuously the differential temperature gradient-heated along nickel-titanium shape memory alloy wire rod length direction, the time of insulation is 1～10 minute; (3) annealing is taken out the nickel-titanium shape memory alloy wire rod from the tuner pyrosphere, and hardening is cooled to room temperature immediately, promptly obtains function continuous gradient nickel-titanium shape memory alloy.
8, a kind of Equipment for Heating Processing that is used to prepare function continuous gradient nickel-titanium shape memory alloy wire rod, comprise a high-frequency induction heating machine and its tuner pyrosphere, it is characterized in that: the multi-turn of helically wound at least three circles of its tuner pyrosphere, the pitch of pyrosphere spiral passes through gradually from small to large, perhaps the pitch of pyrosphere spiral to taper to two ends circle portion pitch for a short time from mesosphere portion pitch big, its sample by pending nickel-titanium shape memory alloy wire rod records its pyrosphere portion at fine pith becomes a high-temperature portion, and becoming a low-temp. portion in the pyrosphere portion of coarse pitch, the gradual change of the pitch of pyrosphere spiral forms the continuous differential temperature gradient-heated temperature to alloy wire.
9, a kind of Equipment for Heating Processing that is used to prepare function continuous gradient nickel-titanium shape memory alloy wire rod according to claim 8, it is characterized in that: the pitch of pyrosphere spiral passes through gradually from small to large, and the diameter of pyrosphere also in the same way pass through gradually from small to large from, perhaps the pitch of pyrosphere spiral to taper to two ends circle portion pitch for a short time from mesosphere portion pitch big, and the diameter of pyrosphere also to taper to two ends circle portion diameter for a short time from mesosphere portion diameter big.
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| CN109047599A (en) * | 2018-08-07 | 2018-12-21 | 中国兵器工业新技术推广研究所 | A kind of bar heating device and method for upsetting |
| CN110172655A (en) * | 2019-04-19 | 2019-08-27 | 武汉理工大学 | Nanocrystalline or Ultra-fine Grained graded metal material and preparation method inside the coarse-grain of surface layer |
| CN110184692A (en) * | 2018-02-23 | 2019-08-30 | 特吕茨施勒有限及两合公司 | Adjusted in spinning preparation machine the workplace between cylinder and at least one operated adjacent element away from device and method |
| CN111893281A (en) * | 2020-08-04 | 2020-11-06 | 何福生 | Automatic earpiece annealing equipment for glasses production |
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2009
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| CN103337457A (en) * | 2013-05-29 | 2013-10-02 | 京东方科技集团股份有限公司 | Annealing apparatus and annealing process |
| WO2014190675A1 (en) * | 2013-05-29 | 2014-12-04 | 京东方科技集团股份有限公司 | Annealing device and annealing process |
| CN103337457B (en) * | 2013-05-29 | 2016-05-25 | 京东方科技集团股份有限公司 | Annealing device and annealing process |
| US9585195B2 (en) | 2013-05-29 | 2017-02-28 | Boe Technology Group Co., Ltd. | Annealing apparatus and annealing process |
| CN110184692A (en) * | 2018-02-23 | 2019-08-30 | 特吕茨施勒有限及两合公司 | Adjusted in spinning preparation machine the workplace between cylinder and at least one operated adjacent element away from device and method |
| CN109047599A (en) * | 2018-08-07 | 2018-12-21 | 中国兵器工业新技术推广研究所 | A kind of bar heating device and method for upsetting |
| CN110172655A (en) * | 2019-04-19 | 2019-08-27 | 武汉理工大学 | Nanocrystalline or Ultra-fine Grained graded metal material and preparation method inside the coarse-grain of surface layer |
| CN110172655B (en) * | 2019-04-19 | 2021-05-04 | 武汉理工大学 | Gradient metal material with nanocrystalline or ultrafine grain inside coarse grain of surface layer and preparation method thereof |
| CN111893281A (en) * | 2020-08-04 | 2020-11-06 | 何福生 | Automatic earpiece annealing equipment for glasses production |
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