CN104259291A - Thermal forming method of amorphous alloy - Google Patents
Thermal forming method of amorphous alloy Download PDFInfo
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- CN104259291A CN104259291A CN201410378988.5A CN201410378988A CN104259291A CN 104259291 A CN104259291 A CN 104259291A CN 201410378988 A CN201410378988 A CN 201410378988A CN 104259291 A CN104259291 A CN 104259291A
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Abstract
The invention relates to the technical field of thermal forming of amorphous alloy, in particular to a thermal forming method of the amorphous alloy. According to the method, an amorphous alloy tubular product is used as a base material. The method comprises the following steps that firstly, thermal forming is carried out, the amorphous alloy tubular product is placed in a mould, inert atmosphere is led into the mould, after reaching a supercooled liquid region, the amorphous alloy tubular product is formed, and a type base is obtained; secondly, the type base is cooled, according to a first cooling method, the mould is kept closed, heat of the inert atmosphere and heat of the type base are conducted through a mould wall, and therefore the inert atmosphere and the type base are cooled, and the pressure of the inert atmosphere is unchangeable in the cooling process of the inert atmosphere; according to the second cooling method, after forming is finished, the pressure of the inert atmosphere is slowly reduced, the mould is opened, cooling gas is led into the mould and used for cooling the type base, in the heating and cooling process, a TTT image is taken as the benchmark, and crystallization reaction cannot happen to the amorphous alloy. The method has the advantages that forming is easy, and the forming effect is good. Energy resources can be saved, the production cost is reduced, the production time is shortened, and the production efficiency is improved.
Description
Technical field
The present invention relates to the thermoforming technology field of non-crystaline amorphous metal, particularly relate to a kind of thermoforming process of non-crystaline amorphous metal.
Background technology
Non-crystaline amorphous metal is because having the good characteristic of the aspects such as intensity, hardness, toughness, wearability, corrosion resistance, soft magnetism and superconductivity, and it is obtained for extensive use in fields such as electronics, machinery, chemical industry.But, although non-crystaline amorphous metal has good characteristic described above, there is difficult processing, difficult shaping shortcoming, thus greatly limit its range of application.Therefore, the shaping technological difficulties becoming non-crystaline amorphous metal application extension of non-crystaline amorphous metal.
US20130306262A1 discloses the blow molding method of bulk metallic glass, and wherein, blow molding is also referred to as air-pressure forming.The prior art is when carrying out blow molding to bulk metallic glass, the base material selected is sheet metal glass, but, sheet metal glass is more difficult when blow molding, need to utilize the gas of more high pressure and temperature to carry out blowing and just can make the shape that sheet metal glass ware forming is final products, therefore, make energy consumption large, thus cause production cost high; And, also make molding effect not ideal enough.
In addition, above-mentioned prior art is when carrying out blow molding to bulk metallic glass, be first move to again after combustion thin plate shape glassy metal under open environment carry out in mould shaping, combustion thin plate shape glassy metal under open environment, easily cause heat leakage, make energy consumption on the one hand large, and extend the production time, affect the effect of blow molding on the other hand.
Summary of the invention
The object of the invention is to the thermoforming process that the non-crystaline amorphous metal that a kind of good forming effect, production cost are low is provided for weak point of the prior art.
For achieving the above object, the present invention is achieved through the following technical solutions.
A kind of thermoforming process of non-crystaline amorphous metal is provided, uses non-crystaline amorphous metal tubing as base material, and comprise the following steps:
Step one, hot briquetting
Be positioned in mould by described non-crystaline amorphous metal tubing, the inert atmosphere then passing into uniform temperature and certain pressure makes described non-crystaline amorphous metal tubing reach supercooling liquid phase region aftershaping, obtains type embryo;
Step 2, cooling type embryo
The method of described cooling type embryo is any one in the first cooling method or the second cooling method, namely can complete the cooling of described type embryo;
Described first cooling method is, keeps described mould to close, and to make described type embryo be attached at the die wall of described mould all the time, the heat of described inert atmosphere and described type embryo is conducted by described die wall, thus completes the cooling of described inert atmosphere and described type embryo; Described inert atmosphere keeps pressure fixing constant in the process of cooling;
Described second cooling method is, after hot briquetting terminates, first slowly reduces the pressure of described inert atmosphere to certain pressure value, then opens described mould, pass into refrigerating gas in order to cool described type embryo;
In described heating and cooling process, all with TTT figure for benchmark, make described non-crystaline amorphous metal all crystallization not occur.
In technique scheme, preferably, the hot briquetting of described step one, before described non-crystaline amorphous metal tubing is positioned over mould, is positioned in described mould after first described non-crystaline amorphous metal tubing being preheating to uniform temperature in the mode of eddy-current heating in inductor again.
In technique scheme, the temperature that described non-crystaline amorphous metal tubing is preheating to is 300 DEG C ~ 500 DEG C.
In technique scheme, the hot briquetting of described step one, the temperature of described inert atmosphere is 300 DEG C ~ 500 DEG C; The pressure of described inert atmosphere is 1bar ~ 30bar.
In technique scheme, in described second cooling method, first slowly reduce the pressure of described inert atmosphere to 1bar ~ 10bar.
In technique scheme, in the cooling type embryo of described step 2, the described refrigerating gas in the second cooling method is inert gas or nitrogen.
In technique scheme, in the cooling type embryo of described step 2, the temperature of the described refrigerating gas in the second cooling method is normal temperature.
In technique scheme, the hot briquetting of described step one, described inert atmosphere is inert gas or nitrogen.
In technique scheme, the hot briquetting of described step one, described inert gas comprises helium, neon, argon gas, Krypton and xenon.
Wherein, TTT figure of the present invention refers to temperature-time transformation diagram, and TTT figure of the present invention as shown in Figure 2.After heating curves reaches supercooling liquid phase region, i.e. glass transition temperature (Tg) and crystallization temperature Tx) between, cool, and heating curves and cooling curve all can not touch crystalline areas.Wherein, in the process of hot briquetting and cooling, only otherwise touch crystalline areas, namely non-crystaline amorphous metal completes hot briquetting and cooling under the situation that crystallization does not occur, namely in non-crystallization region, be chosen to shape parameter, multiple molding parameter all can reach preferably molding effect.
Beneficial effect of the present invention:
(1) thermoforming process of a kind of non-crystaline amorphous metal provided by the invention, owing to using non-crystaline amorphous metal tubing as base material, in the process of carrying out thermoforming, because tubing is relative to the shape of thin plate closer to final products, therefore, tubing ratio is easier to shaping, and good forming effect.
(2) thermoforming process of a kind of non-crystaline amorphous metal provided by the invention, because the non-crystaline amorphous metal tubing as base material is more shaping, the pressure and temperature of inert atmosphere used when making hot briquetting is lower, thus can economize energy, reduces production cost.
(3) thermoforming process of a kind of non-crystaline amorphous metal provided by the invention, during hot briquetting, in a mold or in inductor, heat non-crystaline amorphous metal tubing, avoid non-crystaline amorphous metal tubing to heat under development environment, thus greatly reduce heat leakage, thus can economize energy further, reduce production cost.
(4) thermoforming process of a kind of non-crystaline amorphous metal provided by the invention, before non-crystaline amorphous metal tubing is positioned over mould, be positioned over again in mould after first non-crystaline amorphous metal tubing being preheating to uniform temperature in the mode of eddy-current heating in inductor, the mode of eddy-current heating can make non-crystaline amorphous metal tubing be preheating to rapidly required forming temperature, be positioned over die for molding again, thus substantially reduce the production time, improve production efficiency.
(5) thermoforming process of a kind of non-crystaline amorphous metal provided by the invention, has method simple, can be applicable to the feature of large-scale production.
Accompanying drawing explanation
Fig. 1 is the structural representation that embodiment 3 to the embodiment 6 of the thermoforming process of a kind of non-crystaline amorphous metal of the present invention carries out hot briquetting.
Fig. 2 is the TTT figure of the thermoforming process of a kind of non-crystaline amorphous metal of the present invention.
Include in fig. 1 and 2:
1---non-crystaline amorphous metal tubing,
2---inductor,
3---mould,
4---supercooling liquid phase region,
5---crystalline areas,
6---non-crystallization region.
Detailed description of the invention
Wherein, the supercooling liquid phase region mentioned by the present invention refers between the glass transition temperature (Tg) of non-crystaline amorphous metal and the crystallization temperature (Tx) of non-crystaline amorphous metal.
The inert gas mentioned in the present invention comprises helium, neon, argon gas, Krypton and xenon.
embodiment 1.
The thermoforming process of a kind of non-crystaline amorphous metal of the present embodiment, uses non-crystaline amorphous metal tubing as base material, and comprises the following steps:
Step one, hot briquetting
Non-crystaline amorphous metal tubing is positioned in mould, then passes into helium and make non-crystaline amorphous metal tubing reach supercooling liquid phase region aftershaping, obtain type embryo; In this enforcement, the temperature of helium is 300 DEG C, and pressure is 30bar.
Step 2, cooling type embryo
The present embodiment adopts the first cooling method.
First cooling method is, keep mould to close, with the die wall making type embryo be attached at mould all the time, the heat of helium and type embryo is conducted by die wall, thus completes the cooling of helium and type embryo; Helium keeps pressure fixing constant in the process of cooling; After having cooled, namely obtain non-crystaline amorphous metal product.
In above-mentioned heating and cooling process, all with TTT figure for benchmark, make non-crystaline amorphous metal all crystallization not occur.
The thermoforming process of a kind of non-crystaline amorphous metal of the present embodiment, has easily shaping, and the advantage of good forming effect.And can economize energy, reduce production cost, and can the production time be shortened, enhance productivity.
embodiment 2.
The thermoforming process of a kind of non-crystaline amorphous metal of the present embodiment, uses non-crystaline amorphous metal tubing as base material, and comprises the following steps:
Step one, hot briquetting
Non-crystaline amorphous metal tubing is positioned in mould, then passes into neon and make non-crystaline amorphous metal tubing reach supercooling liquid phase region aftershaping, obtain type embryo; In this enforcement, the temperature of neon is 400 DEG C, and pressure is 20bar.
Step 2, cooling type embryo
The present embodiment adopts the second cooling method.
Second cooling method is, after hot briquetting terminates, first slowly reduces the pressure of neon to 10bar, then opens mould, pass into nitrogen in order to cooling type embryo; Wherein, the temperature of nitrogen is normal temperature; After having cooled, namely obtain non-crystaline amorphous metal product.
In above-mentioned heating and cooling process, all with TTT figure for benchmark, make non-crystaline amorphous metal all crystallization not occur.
The thermoforming process of a kind of non-crystaline amorphous metal of the present embodiment, has easily shaping, and the advantage of good forming effect.And can economize energy, reduce production cost, and can the production time be shortened, enhance productivity.
embodiment 3.
See Fig. 1.The thermoforming process of a kind of non-crystaline amorphous metal of the present embodiment, uses non-crystaline amorphous metal tubing 1 as base material, and comprises the following steps:
Step one, hot briquetting
Be positioned in mould 3 again after first non-crystaline amorphous metal tubing 1 being preheating to 500 DEG C in the mode of eddy-current heating in inductor 2, then pass into argon gas and make non-crystaline amorphous metal tubing 1 reach supercooling liquid phase region aftershaping, obtain type embryo; In this enforcement, the temperature of argon gas is 500 DEG C, and pressure is 1bar.
Step 2, cooling type embryo
The present embodiment adopts the first cooling method.
First cooling method is, keep mould to close, with the die wall making type embryo be attached at mould all the time, the heat of argon gas and type embryo is conducted by die wall, thus completes the cooling of argon gas and type embryo; Argon gas keeps pressure fixing constant in the process of cooling; After having cooled, namely obtain non-crystaline amorphous metal product.
In above-mentioned heating and cooling process, all with TTT figure for benchmark, make non-crystaline amorphous metal all crystallization not occur.
The thermoforming process of a kind of non-crystaline amorphous metal of the present embodiment, has easily shaping, and the advantage of good forming effect.And can economize energy, reduce production cost, and can the production time be shortened, enhance productivity.
embodiment 4.
See Fig. 1.The thermoforming process of a kind of non-crystaline amorphous metal of the present embodiment, uses non-crystaline amorphous metal tubing 1 as base material, and comprises the following steps:
Step one, hot briquetting
Be positioned in mould 3 again after first non-crystaline amorphous metal tubing 1 being preheating to 300 DEG C in the mode of eddy-current heating in inductor 2, then pass into Krypton and make non-crystaline amorphous metal tubing 1 reach supercooling liquid phase region aftershaping, obtain type embryo; In this enforcement, the temperature of Krypton is 300 DEG C, and pressure is 25bar.
Step 2, cooling type embryo
The present embodiment adopts the second cooling method.
Second cooling method is, after hot briquetting terminates, first slowly reduces the pressure of Krypton to 5bar, then opens mould, pass into helium in order to cooling type embryo; Wherein, the temperature of helium is normal temperature; After having cooled, namely obtain non-crystaline amorphous metal product.
In above-mentioned heating and cooling process, all with TTT figure for benchmark, make non-crystaline amorphous metal all crystallization not occur.
The thermoforming process of a kind of non-crystaline amorphous metal of the present embodiment, has easily shaping, and the advantage of good forming effect.And can economize energy, reduce production cost, and can the production time be shortened, enhance productivity.
embodiment 5.
See Fig. 1.The thermoforming process of a kind of non-crystaline amorphous metal of the present embodiment, uses non-crystaline amorphous metal tubing 1 as base material, and comprises the following steps:
Step one, hot briquetting
Be positioned in mould 3 again after first non-crystaline amorphous metal tubing 1 being preheating to 400 DEG C in the mode of eddy-current heating in inductor 2, then pass into xenon and make non-crystaline amorphous metal tubing 1 reach supercooling liquid phase region aftershaping, obtain type embryo; In this enforcement, the temperature of xenon is 400 DEG C, and pressure is 10bar.
Step 2, cooling type embryo
The present embodiment adopts the second cooling method.
Second cooling method is, after hot briquetting terminates, first slowly reduces the pressure of xenon to 1bar, then opens mould, pass into neon in order to cooling type embryo; Wherein, the temperature of neon is normal temperature; After having cooled, namely obtain non-crystaline amorphous metal product.
In above-mentioned heating and cooling process, all with TTT figure for benchmark, make non-crystaline amorphous metal all crystallization not occur.
The thermoforming process of a kind of non-crystaline amorphous metal of the present embodiment, has easily shaping, and the advantage of good forming effect.And can economize energy, reduce production cost, and can the production time be shortened, enhance productivity.
embodiment 6.
See Fig. 1.The thermoforming process of a kind of non-crystaline amorphous metal of the present embodiment, uses non-crystaline amorphous metal tubing 1 as base material, and comprises the following steps:
Step one, hot briquetting
Be positioned in mould 3 again after first non-crystaline amorphous metal tubing 1 being preheating to 350 DEG C in the mode of eddy-current heating in inductor 2, then pass into nitrogen and make non-crystaline amorphous metal tubing 1 reach supercooling liquid phase region aftershaping, obtain type embryo; In this enforcement, the temperature of nitrogen is 350 DEG C, and pressure is 15bar.
Step 2, cooling type embryo
The present embodiment adopts the second cooling method.
Second cooling method is, after hot briquetting terminates, first slowly reduces the pressure of nitrogen to 7bar, then opens mould, pass into argon gas in order to cooling type embryo; Wherein, the temperature of argon gas is normal temperature; After having cooled, namely obtain non-crystaline amorphous metal product.
In above-mentioned heating and cooling process, all with TTT figure for benchmark, make non-crystaline amorphous metal all crystallization not occur.
The thermoforming process of a kind of non-crystaline amorphous metal of the present embodiment, has easily shaping, and the advantage of good forming effect.And can economize energy, reduce production cost, and can the production time be shortened, enhance productivity.
Finally should be noted that; above embodiment is only for illustration of technical scheme of the present invention but not limiting the scope of the invention; although be explained in detail the present invention with reference to preferred embodiment; those of ordinary skill in the art is to be understood that; can modify to technical scheme of the present invention or equivalent replacement, and not depart from essence and the scope of technical solution of the present invention.
Claims (9)
1. a thermoforming process for non-crystaline amorphous metal, is characterized in that: use non-crystaline amorphous metal tubing as base material, and comprise the following steps:
Step one, hot briquetting
Be positioned in mould by described non-crystaline amorphous metal tubing, the inert atmosphere then passing into uniform temperature and certain pressure makes described non-crystaline amorphous metal tubing reach supercooling liquid phase region aftershaping, obtains type embryo;
Step 2, cooling type embryo
The method of described cooling type embryo is any one in the first cooling method or the second cooling method, namely can complete the cooling of described type embryo;
Described first cooling method is, keeps described mould to close, and to make described type embryo be attached at the die wall of described mould all the time, the heat of described inert atmosphere and described type embryo is conducted by described die wall, thus completes the cooling of described inert atmosphere and described type embryo; Described inert atmosphere keeps pressure fixing constant in the process of cooling;
Described second cooling method is, after hot briquetting terminates, first slowly reduces the pressure of described inert atmosphere to certain pressure value, then opens described mould, pass into refrigerating gas in order to cool described type embryo;
In described heating and cooling process, all with TTT figure for benchmark, make described non-crystaline amorphous metal all crystallization not occur.
2. the thermoforming process of a kind of non-crystaline amorphous metal according to claim 1, it is characterized in that: the hot briquetting of described step one, before described non-crystaline amorphous metal tubing is positioned over mould, be positioned over again in described mould after first described non-crystaline amorphous metal tubing being preheating to uniform temperature in the mode of eddy-current heating in inductor.
3. the thermoforming process of a kind of non-crystaline amorphous metal according to claim 2, is characterized in that: the temperature that described non-crystaline amorphous metal tubing is preheating to is 300 DEG C ~ 500 DEG C.
4. the thermoforming process of a kind of non-crystaline amorphous metal according to claim 1, is characterized in that: the hot briquetting of described step one, and the temperature of described inert atmosphere is 300 DEG C ~ 500 DEG C; The pressure of described inert atmosphere is 1bar ~ 30bar.
5. the thermoforming process of a kind of non-crystaline amorphous metal according to claim 1, is characterized in that: in described second cooling method, first slowly reduces the pressure of described inert atmosphere to 1bar ~ 10bar.
6. the thermoforming process of a kind of non-crystaline amorphous metal according to claim 1, is characterized in that: in the cooling type embryo of described step 2, and the described refrigerating gas in the second cooling method is inert gas or nitrogen.
7. the thermoforming process of a kind of non-crystaline amorphous metal according to claim 1, is characterized in that: in the cooling type embryo of described step 2, and the temperature of the described refrigerating gas in the second cooling method is normal temperature.
8. the thermoforming process of a kind of non-crystaline amorphous metal according to claim 1, is characterized in that: the hot briquetting of described step one, described inert atmosphere is inert gas or nitrogen.
9. the thermoforming process of a kind of non-crystaline amorphous metal according to claim 8, it is characterized in that: the hot briquetting of described step one, described inert gas comprises helium, neon, argon gas, Krypton and xenon.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108728779A (en) * | 2018-05-31 | 2018-11-02 | 华中科技大学 | A kind of the flexible forming system and manufacturing process of non-crystaline amorphous metal plank |
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| CN102029382A (en) * | 2010-10-12 | 2011-04-27 | 江苏大学 | Two-step blow forming method and device for amorphous alloy special-shaped tube |
| US8485245B1 (en) * | 2012-05-16 | 2013-07-16 | Crucible Intellectual Property, Llc | Bulk amorphous alloy sheet forming processes |
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| CN101468370A (en) * | 2007-12-28 | 2009-07-01 | 比亚迪股份有限公司 | Amorphous alloy thermoforming apparatus and technique |
| JP2010184249A (en) * | 2009-02-10 | 2010-08-26 | Olympus Corp | Continuous casting method and continuous casting device for amorphous alloy |
| CN102029382A (en) * | 2010-10-12 | 2011-04-27 | 江苏大学 | Two-step blow forming method and device for amorphous alloy special-shaped tube |
| CN103889613A (en) * | 2011-10-21 | 2014-06-25 | 苹果公司 | Joining bulk metallic glass sheets using pressurized fluid forming |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108728779A (en) * | 2018-05-31 | 2018-11-02 | 华中科技大学 | A kind of the flexible forming system and manufacturing process of non-crystaline amorphous metal plank |
| CN108728779B (en) * | 2018-05-31 | 2019-11-12 | 华中科技大学 | A kind of the flexible forming system and manufacturing process of amorphous alloy plate |
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