CN107570550A - A kind of processing technology for being used to optimize hard aluminium alloy crystalline phase organization - Google Patents
A kind of processing technology for being used to optimize hard aluminium alloy crystalline phase organization Download PDFInfo
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- CN107570550A CN107570550A CN201710699729.6A CN201710699729A CN107570550A CN 107570550 A CN107570550 A CN 107570550A CN 201710699729 A CN201710699729 A CN 201710699729A CN 107570550 A CN107570550 A CN 107570550A
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Abstract
A kind of processing technology for being used to optimize hard aluminium alloy crystalline phase organization.It is related to hard alloy processing technology field.Propose that a kind of orderliness is clear, step in order and can be greatly reduced the processing technology for being used to optimize hard aluminium alloy crystalline phase organization of contained coarse grain after hard alloy extrusion forming.The present invention first carries out homogenize process to raw material；Recipient is preheated；Using the processing technology of first jumping-up aftershaping；Extrusion speed, extrusion ratio and extruding force are strictly controlled；The epidermis remained in outside mould is cut off after shaping.The present invention has that orderliness is clear, step is orderly, processing cost is low, high in machining efficiency on the whole, and the advantages of coarse grain ring contained after hard alloy extrusion forming can be greatly reduced.
Description
Technical field
The present invention relates to hard alloy processing technology field.
Background technology
Nowadays client does not require nothing more than product items chemical composition, tensile strength, hardness etc. and touched the mark, it is necessary to ensures production
Product surface is smooth, it is impossible to has granular metal precipitation.For current common hot extrusion industry, the section and length of product are not
Uniformly.The crystal grain of the usually coarse grains at center and head, outer layer and afterbody is tiny.
Specific Crack cause is as follows：On the one hand, the inhomogeneities that extruded product occurs on section and length mainly by
In caused by inhomogeneous deformation；Aluminium bar enters recipient, and gradually upset change is big, by frictional force and mold shape in extrusion process
Limitation, according to metal flow direction, aluminium bar core aluminium is introduced into die cavity in recipient, and outer layer also progresses into die cavity, outside
Layer metal bears very aximal deformation value, so there is structural heterogenity on product section.
Equally, in length, because frictional resistance and mold shape constrain, metal flow inhomogeneities gradually increases.Institute
Bearing deflection also gradually increases, so that the crystal grain degree of wrecking is also gradually to increase from front to back, causes product length
On uneven microstructure.
On the other hand, when extrusion speed is too fast or rod temperature is too high, the increase of stock skin-friction force, temperature in aluminium bar extruding
It is significantly raised, it is also possible to which that for fracture than front end coarse grains, product surface has granular particulate matter of substantially cracking rice after in product.
The content of the invention
The present invention is directed to problem above, it is proposed that a kind of orderliness is clear, step is orderly and hard alloy can be greatly reduced squeezes
The processing technology for being used to optimize hard aluminium alloy crystalline phase organization of contained coarse grain after molded.
The technical scheme is that：Operated according to the following steps：
1）, homogenization：Blank is taken, and all raw material is subjected to homogenization；
2）, heating：Blank is heated；
3）, setting recipient temperature：The initial temperature of recipient is set, is larger than the temperature of blank；
4）, jumping-up：Blank is sent into recipient and carries out jumping-up；
5）, give up the throne：Drive recipient elder generation and mould so that reserve gap therebetween, then drive recipient traveling and mould
Tool fitting；
6）, shaping：By in blank self compaction cylinder at the uniform velocity press-in die；
7）, discharging：The epidermis remained in outside mould is cut off, and exports finished product materials；Finish.
Step 6）In the press-in speed that at the uniform velocity extrudes be 0.35-0.45mm/s.
Step 6）Extrusion ratio during middle blank press-in is 0.25-0.3.
Step 6）The ratio of material diameter and extruding force during middle blank press-in is 1-1.5mm/MPa.
The processing technology also includes step 8）In can be first by alloy components natural cooling 5-20min, then carry out Quenching Treatment.
The invention has the characteristics that：One, homogenize process first is carried out to raw material；Secondly, recipient is carried out it is pre-
Heat；Thirdly, using the processing technology of first jumping-up aftershaping；Four, extrusion speed, extrusion ratio and extruding force are strictly controlled
System；The epidermis remained in outside mould is cut off after five, being molded.So, that is, hard in the prior art is efficiently solved
The problem of coarse grain is more contained by outer layer in aluminium alloy so that without the problem of being directed to coarse grain again add after shaping
Work, processing cost is effectively reduced, improve processing efficiency.
The present invention has that orderliness is clear, step is orderly, processing cost is low, high in machining efficiency on the whole, and can be significantly
After reduction hard alloy extrusion forming the advantages of contained coarse grain ring.
Embodiment
The present invention by being operated according to the following steps：
1）, homogenization：Blank is taken, and all raw material is subjected to homogenization；So that the distribution of blank internal grain is equal
Even, particle further refines；
2）, heating：Blank is heated；
3）, setting recipient temperature：The initial temperature of recipient is set, is larger than the temperature of blank；So, change can be made
Shape amount is reduced, and reduces coarse grain ring depth；
4）, jumping-up：Blank is sent into recipient and carries out jumping-up；
5）, give up the throne：Drive recipient elder generation and mould so that reserve gap therebetween, then drive recipient traveling and mould
Tool fitting；So, by the process of giving up the throne once can effectively shed material into before mould with air pressure present in mold cavity（It is high
In ambient pressure）, so as to effectively prevent the generation of its foam inside after material forming；
6）, shaping：By in blank self compaction cylinder at the uniform velocity press-in die；
7）, discharging：The epidermis remained in outside mould is cut off, and exports finished product materials；Finish.So, by first jumping-up again into
The mode of type may be such that the core of blank will be pressed into mould, and the epidermis of blank is then by the work of pressure and frictional force
Stayed under outside mould, so as to which the few finished product materials of coarse grain content can be obtained after epidermis is cut off.
Step 6）In the press-in speed that at the uniform velocity extrudes be 0.35-0.45mm/s.
Step 6）Extrusion ratio during middle blank press-in（I.e. be molded after material diameter and jumping-up after material diameter ratio
Value）For 0.25-0.3.
Step 6）The ratio of material diameter and extruding force during middle blank press-in is 1-1.5mm/MPa.So, that is, need
Press-in speed, extrusion ratio, extruding force are strictly controlled during actual processing, so that the maximum journey from source in process
The generation for avoiding coarse grain of degree.
The processing technology also includes step 8）In can be first by alloy components natural cooling 5-20min, then carry out Quenching Treatment.
Claims (5)
1. a kind of processing technology for being used to optimize hard aluminium alloy crystalline phase organization, it is characterised in that carry out according to the following steps
Operation：
1）, homogenization：Blank is taken, and all raw material is subjected to homogenization；
2）, heating：Blank is heated；
3）, setting recipient temperature：The initial temperature of recipient is set, is larger than the temperature of blank；
4）, jumping-up：Blank is sent into recipient and carries out jumping-up；
5）, give up the throne：Drive recipient elder generation and mould so that reserve gap therebetween, then drive recipient traveling and mould
Tool fitting；
6）, shaping：By in blank self compaction cylinder at the uniform velocity press-in die；
7）, discharging：The epidermis remained in outside mould is cut off, and exports finished product materials；Finish.
2. a kind of processing technology for being used to optimize hard aluminium alloy crystalline phase organization according to claim 1, its feature
It is, step 6）In the press-in speed that at the uniform velocity extrudes be 0.35-0.45mm/s.
3. a kind of processing technology for being used to optimize hard aluminium alloy crystalline phase organization according to claim 1, its feature
It is, step 6）Extrusion ratio during middle blank press-in is 0.25-0.3.
4. a kind of processing technology for being used to optimize hard aluminium alloy crystalline phase organization according to claim 1, its feature
It is, step 6）The ratio of material diameter and extruding force during middle blank press-in is 1-1.5mm/MPa.
5. a kind of processing technology for being used to optimize hard aluminium alloy crystalline phase organization according to claim 1, its feature
It is, the processing technology also includes step 8）In can be first by alloy components natural cooling 5-20min, then carry out Quenching Treatment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710699729.6A CN107570550A (en) | 2017-08-16 | 2017-08-16 | A kind of processing technology for being used to optimize hard aluminium alloy crystalline phase organization |
Applications Claiming Priority (1)
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| CN201710699729.6A CN107570550A (en) | 2017-08-16 | 2017-08-16 | A kind of processing technology for being used to optimize hard aluminium alloy crystalline phase organization |
Publications (1)
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| CN107570550A true CN107570550A (en) | 2018-01-12 |
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| CN201710699729.6A Pending CN107570550A (en) | 2017-08-16 | 2017-08-16 | A kind of processing technology for being used to optimize hard aluminium alloy crystalline phase organization |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102166712A (en) * | 2010-12-31 | 2011-08-31 | 东莞市东兴铝材制造有限公司 | Hot extrusion production process for aluminum tube with polished surface |
| CN102492904A (en) * | 2011-12-31 | 2012-06-13 | 辽宁忠旺集团有限公司 | Extrusion processing technology of cylinder block aluminum alloy section |
| JP2012207302A (en) * | 2011-03-16 | 2012-10-25 | Kobe Steel Ltd | METHOD FOR MANUFACTURING EXTRUDED MATERIAL OF HEAT TREATMENT TYPE Al-Zn-Mg-BASED ALUMINUM ALLOY |
| CN102925828A (en) * | 2011-08-09 | 2013-02-13 | 佛山市鸿金源铝业制品有限公司 | Extrusion and heat treatment method for high speed railway locator aluminum material |
| CN104046859A (en) * | 2014-06-26 | 2014-09-17 | 龙口市丛林铝材有限公司 | Grain-refined extruded aluminum alloy tubular product with large wall thickness and preparation method thereof |
-
2017
- 2017-08-16 CN CN201710699729.6A patent/CN107570550A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102166712A (en) * | 2010-12-31 | 2011-08-31 | 东莞市东兴铝材制造有限公司 | Hot extrusion production process for aluminum tube with polished surface |
| JP2012207302A (en) * | 2011-03-16 | 2012-10-25 | Kobe Steel Ltd | METHOD FOR MANUFACTURING EXTRUDED MATERIAL OF HEAT TREATMENT TYPE Al-Zn-Mg-BASED ALUMINUM ALLOY |
| CN102925828A (en) * | 2011-08-09 | 2013-02-13 | 佛山市鸿金源铝业制品有限公司 | Extrusion and heat treatment method for high speed railway locator aluminum material |
| CN102492904A (en) * | 2011-12-31 | 2012-06-13 | 辽宁忠旺集团有限公司 | Extrusion processing technology of cylinder block aluminum alloy section |
| CN104046859A (en) * | 2014-06-26 | 2014-09-17 | 龙口市丛林铝材有限公司 | Grain-refined extruded aluminum alloy tubular product with large wall thickness and preparation method thereof |
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Application publication date: 20180112 |
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| RJ01 | Rejection of invention patent application after publication |