CN102560161A - Method for preparing semi-solid slurry by strain induced melt activation (SIMA) method - Google Patents
Method for preparing semi-solid slurry by strain induced melt activation (SIMA) method Download PDFInfo
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- CN102560161A CN102560161A CN2012100541484A CN201210054148A CN102560161A CN 102560161 A CN102560161 A CN 102560161A CN 2012100541484 A CN2012100541484 A CN 2012100541484A CN 201210054148 A CN201210054148 A CN 201210054148A CN 102560161 A CN102560161 A CN 102560161A
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- 239000007787 solid Substances 0.000 title claims abstract description 59
- 239000002002 slurry Substances 0.000 title claims abstract description 41
- 238000000034 method Methods 0.000 title claims abstract description 36
- 230000004913 activation Effects 0.000 title abstract description 4
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 35
- 239000000956 alloy Substances 0.000 claims abstract description 35
- 239000007790 solid phase Substances 0.000 claims abstract description 14
- 238000001953 recrystallisation Methods 0.000 claims abstract description 11
- 238000005242 forging Methods 0.000 claims abstract description 7
- 238000002360 preparation method Methods 0.000 abstract description 10
- 238000010438 heat treatment Methods 0.000 abstract description 9
- 230000007547 defect Effects 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 description 9
- 229910000861 Mg alloy Inorganic materials 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 229910000737 Duralumin Inorganic materials 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 229910000881 Cu alloy Inorganic materials 0.000 description 2
- 210000001787 dendrite Anatomy 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 238000004537 pulping Methods 0.000 description 2
- 238000007669 thermal treatment Methods 0.000 description 2
- 229910001283 5083 aluminium alloy Inorganic materials 0.000 description 1
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910000906 Bronze Inorganic materials 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 229910001338 liquidmetal Inorganic materials 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
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Abstract
The invention relates to the field of the preparation of semi-solid slurry, in particular to a method for preparing semi-solid slurry by a new strain induced melt activation (SIMA) method. By the method, the problem of quality defects during the preparation of the semi-solid slurry in the prior art is solved. The method comprises the following steps of: heating an alloy to above the recrystallization temperature according to liquidus and solidus points of a semi-solid slurry alloy to be prepared; drawing out and upsetting the alloy for multiple times by utilizing a cogging forging process; and heating the alloy to a semi-solid temperature interval to prepare the semi-solid slurry with a certain solid-phase rate. By the method, the semi-solid slurry of multiple alloys can be prepared, so the method has the advantages of simplicity of operation, convenience for control, high nodulizing rate, accurate control of the solid-phase rate and the like.
Description
Technical field
The present invention relates to the method that a kind of SIMA legal system is equipped with semi solid slurry, belong to the technical field of metal semi-solid slurry.
Background technology
The semi-solid-state metal technology is propose the seventies in 20th century a kind of between technology liquid, solid molding.It fills characteristics such as type is steady, product compactness is high, little to the thermal shocking of mould, mechanical property is high, plastic force is low owing to having, and has broad application prospects in fields such as automobile, Aeronautics and Astronautics.Wherein, preparing the semi-solid metal slurry with even, tiny non-dendritic structure, is a most important link in the Semi-Solid Metals Forming technology, is the crucial and basic of Semi-Solid Metals Forming technology.The quality of semi solid slurry has determined the quality of following process means and final Forming Workpiece.
At present, the technology of preparing of semi solid slurry has reached kind more than 20, mainly is divided into: three kinds of liquid phase process, control freezing method and solid state process.Wherein, SIMA method (Strain Induced Melt Activation; Strain-induced fusing activation method) do not need the agitating procedure of liquid metal; Therefore the semi solid slurry density of preparation is high, pollution-free, applied widely, and especially the non-dendrite alloy to the preparation higher melt has unique advantages.The SIMA pulping method comprises novel methods such as traditional method such as pier is thick, extruding and Equal Channel Angular Pressing, high pressure torsion.
Shortcoming such as when traditional methods such as pier is thick, extruding prepare semi solid slurry, have that the slurry nodularization rate that deflection is little, distortion is inhomogeneous and finally cause preparing is low, tissue and performance are inhomogeneous.The pulping process that Equal Channel Angular Pressing, high pressure torsion etc. are new has characteristics such as deflection is big, mould complicacy, shortcoming such as make that the slurry specimen size of preparation is little, complex process, tissue odds are even.
Summary of the invention
In order to overcome the shortcoming that above-mentioned SIMA prepares semi solid slurry; The object of the present invention is to provide a kind of simple, efficient, tissue and performance to prepare the technology of semi solid slurry uniformly, solve defect problems such as the tissue odds that the preparation semi solid slurry produces in the prior art is even, specimen size is little.
Technical scheme of the present invention is: at first measure the liquid-solid phase line point of the semi-solid alloy that institute will prepare, add thermalloy then and carry out cogging and forge, obtain the semi solid slurry of required solid rate after insulation for some time, comprise as follows specifically preparation process:
(1) measures the liquid-solid phase line point that will prepare the semi solid slurry alloy;
(2) alloy billet is heated on the recrystallization temperature within 100 ℃ of scopes, utilizes the cogging forging process, blank is carried out multi-pass, the pulling of many fire and jumping-up repeatedly; Before each pulling or the jumping-up, if the temperature of blank drops to below the recrystallization temperature, then need be with within 100 ℃ of scopes on blank heating to the recrystallization temperature.
(3) alloy billet after will being out of shape be heated to liquid-solid phase line temperature that step (1) records interval and be incubated 5～40 minutes after shrend, obtain semi-solid blank.
In the said step (2), the SIMA method that slurrying is adopted is the cogging forging process, also promptly adopts the pulling and the upsetting formation of multi-pass, many fire, finally makes the deflection of the alloy billet after cogging is forged can reach 30～50%.
In the said step (3); Alloy billet after cogging is forged will carry out isothermal thermal treatment; Be heated to the interval and insulation of liquid-solid phase line temperature, through controlling the semi solid slurry that Heating temperature and soaking time obtain different solid rates, identical Heating temperature; Heat-up time is long more, and the solid rate of slurry is low more; Identical heat-up time, temperature is high more, and the solid rate of slurry is low more.
Characteristics of the present invention are exactly to adopt the pulling and the jumping-up distortion of multi-pass, many fire; Combine isothermal thermal treatment to prepare semi solid slurry then; Mainly be to utilize repeatedly pulling and jumping-up to be out of shape, prepare the semi solid slurry that homogeneous microstructure, nodularization rate are controlled accurate large-size to replace technologies such as existing compression, extruding, Equal Channel Angular Pressing.
Advantage of the present invention and beneficial effect are:
1, adopt the present invention, make alloy billet carry out cogging and be swaged into shape, it is thick to be embodied in the pulling and the pier that carry out multi-pass, many fire.Pier repeatedly pulls out in the process; Bigger change can not take place in the shape and size of blank, and blank can obtain bigger viscous deformation, the initial dendrite of broken blank; Lay in a large amount of plastic deformation abilities, the inner a large amount of dislocations and the subgrain boundary of wide-angle of producing of crystal grain.In the isothermal heat treatment process in liquid-solid subsequently phase line interval, can obtain semi solid slurry even, tiny spherodized structure, solid rate 60～85%.
2, the present invention is simple to operate, and gained semi solid slurry tissue and performance are good.
Description of drawings
Fig. 1 is the schema of forming technology of the present invention;
The copper alloy semi-solid blank microtexture that Fig. 2 obtains for the present invention.
Embodiment
Below in conjunction with embodiment and accompanying drawing the present invention is done further elaboration, but protection content of the present invention is not limited to said scope.
Embodiment 1:
SIMA legal system of the present invention is equipped with ZCuSn10P1 tinbronze preparation method of semisolid state slurry thereof (referring to Fig. 1):
(1) measures the liquid-solid phase line point that will prepare the semi solid slurry alloy; In the present embodiment, alloy is the ZCuSn10P1 tin bronze alloys, is of a size of the cylinder of Φ 19 * 22mm, and the solidus temperature of utilizing dsc (DSC) to measure this alloy is 833
oC, liquidus temperature are 1000
OC
(2) alloy billet is heated on the recrystallization temperature, utilizes the cogging forging process, blank is carried out the pulling and the jumping-up of multi-pass, many fire; In the present embodiment, tinbronze is heated to 450
OC, it is thick earlier axially it to be carried out 1 pier along blank then, and each draught is 2mm; To its pulling, draught per pass is 1mm at last, pulls out 6 passages altogether, and the deflection of the alloy billet after cogging is forged reaches 30%; Before each pulling or the jumping-up, if the temperature of blank drops to below the recrystallization temperature, all need be with blank heating to 450
OC
(3) it is interval and be incubated for some time that the alloy billet after will being out of shape is heated to liquid-solid phase line, prepares the semi solid slurry of certain solid rate; In the present embodiment, the tinbronze after the distortion is heated to 900
OCAnd be incubated 5 minutes, and shrend then, the microtexture of finally preparing the tinbronze semi-solid blank is as shown in Figure 2, its homogeneous microstructure, solid rate is 85%.
Embodiment 2:
SIMA legal system of the present invention is equipped with 5083 aluminium alloy semi-solid slurry preparing methods (referring to Fig. 1):
(1) measures the liquid-solid phase line point that will prepare the semi solid slurry alloy; In the present embodiment, alloy is 5083 duraluminums, is of a size of the cylinder of Φ 30 * 45mm, and the solidus temperature of utilizing dsc (DSC) to measure this alloy is 571
oC, liquidus temperature are 642
OC
(2) alloy billet is heated on the recrystallization temperature, utilizes the cogging forging process, blank is carried out the pulling and the jumping-up of multi-pass, many fire; In the present embodiment, duraluminum is heated to 460
OC, it is thick earlier axially it to be carried out 3 piers along blank then, and each draught is 4mm; To its pulling, draught per pass is 2mm at last, pulls out 6 passages altogether, and the deflection of the alloy billet after cogging is forged reaches 40%; Before each pulling or the jumping-up, if the temperature of blank drops to below the recrystallization temperature, all need be with blank heating to 460
OC
(3) it is interval and be incubated for some time that the alloy billet after will being out of shape is heated to liquid-solid phase line, prepares the semi solid slurry of certain solid rate; In the present embodiment, the duraluminum after the distortion is heated to 600
OCAnd being incubated 15 minutes, homogeneous microstructure, aluminium alloy semi-solid state blank that the nodularization rate is high are finally prepared in shrend then.
Embodiment 3: SIMA legal system of the present invention is equipped with AZ91 magnesium alloy semisolid slurry preparation method (referring to Fig. 1):
(1) measures the liquid-solid phase line point that will prepare the semi solid slurry alloy; In the present embodiment, alloy is the AZ91 magnesiumalloy, is of a size of the cylinder of Φ 50 * 70mm, and the solidus temperature of utilizing dsc (DSC) to measure this alloy is 503
oC, liquidus temperature are 595
oC;
(2) alloy billet is heated on the recrystallization temperature, utilizes the cogging forging process, blank is carried out the pulling and the jumping-up of multi-pass, many fire; In the present embodiment, magnesiumalloy is heated to 300
OC, it is thick earlier axially it to be carried out 4 piers along blank then, and each draught is 6mm; To its pulling, draught per pass is 4mm at last, pulls out 6 passages altogether, and the deflection of the alloy billet after cogging is forged reaches 50%; Before each pulling or the jumping-up, if the temperature of blank drops to below the recrystallization temperature, all need be with blank heating to 300
OC
(3) it is interval and be incubated for some time that the alloy billet after will being out of shape is heated to liquid-solid phase line, prepares the semi solid slurry of certain solid rate; In the present embodiment, the magnesiumalloy after the distortion is heated to 560
OCAnd being incubated 40 minutes, homogeneous microstructure, magnesium alloy semi-solid state blank that the nodularization rate is high are finally prepared in shrend then.
The result shows that the present invention has advantages such as simple to operate, control convenience, nodularization rate height, solid rate precise control, can be applied to the preparation of copper alloy, duraluminum and magnesium alloy semi-solid state blank.
Claims (2)
1. a SIMA legal system is equipped with the method for semi solid slurry, it is characterized in that comprising following concrete steps:
(1) measures the liquid-solid phase line point that will prepare the semi solid slurry alloy;
(2) alloy billet is heated on the recrystallization temperature within 100 ℃ of scopes, utilizes the cogging forging process, blank is carried out multi-pass, the pulling of many fire and jumping-up repeatedly;
(3) alloy billet after will being out of shape be heated to liquid-solid phase line temperature that step (1) records interval and be incubated 5～40 minutes after shrend, obtain semi-solid blank.
2. SIMA legal system according to claim 1 is equipped with the method for semi solid slurry, it is characterized in that: in the said step (2), finally make the deflection of the alloy billet after cogging is forged can reach 30～50%.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103170602A (en) * | 2013-03-14 | 2013-06-26 | 哈尔滨工业大学 | Preparation method of Titanium-Copper (Ti-Cu) type titanium alloy semi-solid blank |
| CN103233190A (en) * | 2013-05-02 | 2013-08-07 | 昆明理工大学 | Method for preparing semisolid blank |
| CN103343308A (en) * | 2013-07-22 | 2013-10-09 | 哈尔滨工业大学 | Device and method for preparing magnesium alloy semi-solid blank through repetitive upsetting-extrusion deformation and isothermal annealing |
| CN103451584A (en) * | 2013-08-06 | 2013-12-18 | 昆明理工大学 | Method for preparing tin bronze equiaxial structure |
| CN104264089A (en) * | 2014-09-17 | 2015-01-07 | 西安交通大学 | Process for preparing semisolid aluminum alloy blank by compounding electromagnetic molding and secondary remelting |
| CN104498846A (en) * | 2014-12-26 | 2015-04-08 | 西安交通大学 | Method for preparing semi-solid metal blank |
| CN104759601A (en) * | 2015-03-19 | 2015-07-08 | 昆明理工大学 | Copper alloy rheoforming method |
| CN106435128A (en) * | 2016-11-12 | 2017-02-22 | 湘潭大学 | Preparation method for semi-solid state blank of steel |
| CN109202031A (en) * | 2018-10-25 | 2019-01-15 | 成都先进金属材料产业技术研究院有限公司 | The preparation method of the automobile-used alloy semi-solid blank of predeformation |
| CN112030082A (en) * | 2020-08-05 | 2020-12-04 | 昆明理工大学 | Method for preparing metal semi-solid slurry by preheating treatment SIMA method |
-
2012
- 2012-03-05 CN CN2012100541484A patent/CN102560161A/en active Pending
Non-Patent Citations (2)
| Title |
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| 张发云: "《AZ61镁合金SIMA法半固态制备及二次加热的研究》", 《工程科技I辑》 * |
| 董湘怀: "《金属塑性成形原理》", 31 July 2011, 机械工业出版社 * |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103170602B (en) * | 2013-03-14 | 2015-07-22 | 哈尔滨工业大学 | Preparation method of Titanium-Copper (Ti-Cu) type titanium alloy semi-solid blank |
| CN103170602A (en) * | 2013-03-14 | 2013-06-26 | 哈尔滨工业大学 | Preparation method of Titanium-Copper (Ti-Cu) type titanium alloy semi-solid blank |
| CN103233190A (en) * | 2013-05-02 | 2013-08-07 | 昆明理工大学 | Method for preparing semisolid blank |
| CN103343308A (en) * | 2013-07-22 | 2013-10-09 | 哈尔滨工业大学 | Device and method for preparing magnesium alloy semi-solid blank through repetitive upsetting-extrusion deformation and isothermal annealing |
| CN103451584A (en) * | 2013-08-06 | 2013-12-18 | 昆明理工大学 | Method for preparing tin bronze equiaxial structure |
| CN103451584B (en) * | 2013-08-06 | 2015-08-26 | 昆明理工大学 | A kind of method of tin bronze equiaxial structure |
| CN104264089B (en) * | 2014-09-17 | 2016-05-25 | 西安交通大学 | A kind of electro-magnetic forming and the compound aluminium alloy semi-solid state blank technique of preparing of secondary remelting |
| CN104264089A (en) * | 2014-09-17 | 2015-01-07 | 西安交通大学 | Process for preparing semisolid aluminum alloy blank by compounding electromagnetic molding and secondary remelting |
| CN104498846A (en) * | 2014-12-26 | 2015-04-08 | 西安交通大学 | Method for preparing semi-solid metal blank |
| CN104498846B (en) * | 2014-12-26 | 2017-11-28 | 西安交通大学 | A kind of preparation method of semisolid metal blank |
| CN104759601A (en) * | 2015-03-19 | 2015-07-08 | 昆明理工大学 | Copper alloy rheoforming method |
| CN106435128A (en) * | 2016-11-12 | 2017-02-22 | 湘潭大学 | Preparation method for semi-solid state blank of steel |
| CN109202031A (en) * | 2018-10-25 | 2019-01-15 | 成都先进金属材料产业技术研究院有限公司 | The preparation method of the automobile-used alloy semi-solid blank of predeformation |
| CN112030082A (en) * | 2020-08-05 | 2020-12-04 | 昆明理工大学 | Method for preparing metal semi-solid slurry by preheating treatment SIMA method |
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Application publication date: 20120711 |