CN102198501B - Thixotropic plastic forming method for metal alloy - Google Patents

Thixotropic plastic forming method for metal alloy Download PDF

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Publication number
CN102198501B
CN102198501B CN2010105748415A CN201010574841A CN102198501B CN 102198501 B CN102198501 B CN 102198501B CN 2010105748415 A CN2010105748415 A CN 2010105748415A CN 201010574841 A CN201010574841 A CN 201010574841A CN 102198501 B CN102198501 B CN 102198501B
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China
Prior art keywords
semi
solid
blank
die
metal alloy
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Expired - Fee Related
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CN2010105748415A
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Chinese (zh)
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CN102198501A (en
Inventor
闫洪
胡志
周冰锋
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Nanchang University
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Nanchang University
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Publication of CN102198501B publication Critical patent/CN102198501B/en
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Abstract

The invention discloses a thixotropic plastic forming method for a metal alloy. The method comprises the following steps of: performing isothermal thermal treatment on the metal alloy to obtain a semi-solid blank containing 85 to 93 percent of solid phase, processing the semi-solid blank into a blank with the same volume as the die cavity of a die, preheating the die to the temperature of between 200 and 260 DEG C, spraying graphite into the die cavity to facilitate stripping, preserving the heat of the semi-solid blank for 8 to 13 minutes at the temperature of between 535 and 555 DEG C, putting the semi-solid blank into the preheated die, and performing thixotropic plastic forming in a die forging hydraulic press. The method has the advantages that: by adopting the thixotropic plastic forming technology for forming parts, the application field of the semi-solid technology is enlarged, the consumption of energy can be reduced, the product quality is improved, and the practical process of the semi-solid forming technology is boosted.

Description

A kind of method of metal alloy thixotroping Plastic Forming
Technical field
The present invention relates to the method that a kind of metal alloy is shaped, relate in particular to a kind of method of metal alloy thixotroping Plastic Forming.
Background technology
The semisolid forming technique is a kind of brand-new forming technique that liquid condition shaping is technological and the formed solid technical development is got up that continues.Compare with preceding two kinds of forming techniques commonly used, its main difference is the prefabricated semi solid slurry with non-dendritic structure is injected mould, coagulation forming under pressure.The advantage of this moulding is that defectives such as goods dense structure, casting or forging reduce, and comprehensive mechanical property promotes significantly.
Summary of the invention
The object of the present invention is to provide a kind of method of metal alloy thixotroping Plastic Forming, this method moves into the semi-solid-state metal blank of high fraction solid in the forge die, and the part of mould is to another part motion and press molding then.Its advantage is: enlarged the scope of complicated drip molding, can realize near-net forming, significantly reduced process procedure; Processing cost is low, and the forging power consumption is low, and cutting output is few; Stock utilization is high, is the method that a kind of comparatively desirable semi-solid state forming technique prepares metal parts.
The present invention realizes like this; Method is: metal alloy is carried out isothermal heat treatment, obtain having fraction solid and be 85%~93% semi-solid blank, and be processed into the blank that has equal volume with the mould die cavity; Behind the mould and die preheating to 200 ℃~260 ℃; Graphite spraying in die cavity is carried out the thixotroping Plastic Forming so that the demoulding is put into the good mould of preheating with above-mentioned semi-solid blank behind 535 ℃~555 ℃ insulation 8min~13min in stamp forging hydraulic press.
Advantage of the present invention is: adopt the thixotroping plastic forming technology to carry out part forming, not only enlarged the application of semi-soild-state technology, and can reduce energy resource consumption, improve the quality of products, and advance the practicalization of semi-solid state forming technique.
The specific embodiment
Embodiment 1: metal alloy is carried out isothermal heat treatment, obtain having fraction solid and be 85% semi-solid blank, and carry out machining, be of a size of Φ 50 * 17.5mm.Behind the mould and die preheating to 205 ℃, graphite spraying in die cavity is so that the demoulding.Above-mentioned semi-solid blank is put into the good mould of preheating behind 535 ℃ of insulation 8min, in stamp forging hydraulic press, carry out the thixotroping Plastic Forming.
Embodiment 2: metal alloy is carried out isothermal heat treatment, obtain having fraction solid and be 89% semi-solid blank, and carry out machining, be of a size of Φ 50 * 17.5mm.Behind the mould and die preheating to 225 ℃, graphite spraying in die cavity is so that the demoulding.Above-mentioned semi-solid blank is put into the good mould of preheating behind 545 ℃ of insulation 10min, in stamp forging hydraulic press, carry out the thixotroping Plastic Forming.
Embodiment 3: metal alloy is carried out isothermal heat treatment, obtain having fraction solid and be 93% semi-solid blank, and carry out machining, be of a size of Φ 50 * 17.5mm.Behind the mould and die preheating to 255 ℃, graphite spraying in die cavity is so that the demoulding.Above-mentioned semi-solid blank is put into the good mould of preheating behind 555 ℃ of insulation 13min, in stamp forging hydraulic press, carry out the thixotroping Plastic Forming.
In sum, the gear product that adopts the thixotroping Plastic Forming to obtain, the piece surface smooth does not have cracking, and the double wedge of the difficulty that is shaped is partially-formed complete, and profile of tooth is clear.Therefore, adopt the Semi-Solid Thixoforming plastic forming technology to carry out part forming, not only enlarged the application of semi-soild-state technology, and can reduce energy resource consumption, improve the quality of products, and advance the practicalization of semi-solid state forming technique.

Claims (1)

1. the method for a metal alloy thixotroping Plastic Forming; It is characterized in that method is: metal alloy is carried out isothermal heat treatment, obtain having fraction solid and be 85%~93% semi-solid blank, and be processed into the blank that has equal volume with the mould die cavity; Behind the mould and die preheating to 200 ℃~260 ℃; Graphite spraying in die cavity is carried out the thixotroping Plastic Forming so that the demoulding is put into the good mould of preheating with above-mentioned semi-solid blank behind 535 ℃~555 ℃ insulation 8min~13min in stamp forging hydraulic press.
CN2010105748415A 2010-12-06 2010-12-06 Thixotropic plastic forming method for metal alloy Expired - Fee Related CN102198501B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2010105748415A CN102198501B (en) 2010-12-06 2010-12-06 Thixotropic plastic forming method for metal alloy

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2010105748415A CN102198501B (en) 2010-12-06 2010-12-06 Thixotropic plastic forming method for metal alloy

Publications (2)

Publication Number Publication Date
CN102198501A CN102198501A (en) 2011-09-28
CN102198501B true CN102198501B (en) 2012-11-21

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CN2010105748415A Expired - Fee Related CN102198501B (en) 2010-12-06 2010-12-06 Thixotropic plastic forming method for metal alloy

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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102172754A (en) * 2011-01-17 2011-09-07 南昌大学 Thixotropic plastic forming method for metal alloys
CN102581257B (en) * 2012-03-05 2013-10-30 中国兵器工业第五九研究所 Circulating closed die forging method for preparing magnesium alloy semi-solid billet and thixoextrusion forming method

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4638535A (en) * 1982-01-06 1987-01-27 Olin Corporation Apparatus for forming a thixoforged copper base alloy cartridge casing
CN1566395A (en) * 2003-06-30 2005-01-19 哈尔滨工业大学 Composite preparation method for isothermal spherocrystallization semisolid blank from magnesium alloy by diameter variable curve extrusion pressing and shearing induction
CN101003863A (en) * 2007-01-23 2007-07-25 北京科技大学 Method for preparing and rheologic molding semisolid alloy pulp
CN101015857A (en) * 2007-03-09 2007-08-15 清华大学 Semi-solid state flexible extrusion molding technique for shaped complex parts
CN101020201A (en) * 2007-03-16 2007-08-22 清华大学 Semi-solid multi-blank extruding process and apparatus for forming double-layer composite pipe

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4638535A (en) * 1982-01-06 1987-01-27 Olin Corporation Apparatus for forming a thixoforged copper base alloy cartridge casing
CN1566395A (en) * 2003-06-30 2005-01-19 哈尔滨工业大学 Composite preparation method for isothermal spherocrystallization semisolid blank from magnesium alloy by diameter variable curve extrusion pressing and shearing induction
CN101003863A (en) * 2007-01-23 2007-07-25 北京科技大学 Method for preparing and rheologic molding semisolid alloy pulp
CN101015857A (en) * 2007-03-09 2007-08-15 清华大学 Semi-solid state flexible extrusion molding technique for shaped complex parts
CN101020201A (en) * 2007-03-16 2007-08-22 清华大学 Semi-solid multi-blank extruding process and apparatus for forming double-layer composite pipe

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CN102198501A (en) 2011-09-28

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Granted publication date: 20121121

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