CN1759946A - Solid phase forming method for waste of magnesium alloy - Google Patents
Solid phase forming method for waste of magnesium alloy Download PDFInfo
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- CN1759946A CN1759946A CN 200510010490 CN200510010490A CN1759946A CN 1759946 A CN1759946 A CN 1759946A CN 200510010490 CN200510010490 CN 200510010490 CN 200510010490 A CN200510010490 A CN 200510010490A CN 1759946 A CN1759946 A CN 1759946A
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- magnesium alloy
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- solid phase
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- 229910000861 Mg alloy Inorganic materials 0.000 title claims abstract description 63
- 238000000034 method Methods 0.000 title claims abstract description 29
- 239000007790 solid phase Substances 0.000 title claims abstract description 20
- 239000002699 waste material Substances 0.000 title claims abstract description 12
- 238000001125 extrusion Methods 0.000 claims abstract description 21
- 238000010438 heat treatment Methods 0.000 claims abstract description 10
- 239000000463 material Substances 0.000 claims description 11
- 238000010304 firing Methods 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 2
- 239000010959 steel Substances 0.000 claims description 2
- 238000000465 moulding Methods 0.000 abstract description 4
- 238000010309 melting process Methods 0.000 abstract description 2
- 239000007769 metal material Substances 0.000 abstract description 2
- 239000003223 protective agent Substances 0.000 abstract description 2
- 230000008929 regeneration Effects 0.000 abstract description 2
- 238000011069 regeneration method Methods 0.000 abstract description 2
- 239000003795 chemical substances by application Substances 0.000 abstract 1
- 239000013078 crystal Substances 0.000 abstract 1
- 235000021190 leftovers Nutrition 0.000 abstract 1
- 238000005266 casting Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000009418 renovation Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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Abstract
镁合金废料固相成型方法，本发明属于金属材料成型方法。它解决了现有镁合金再生成型需重熔过程和添加覆盖剂以及工艺复杂，而且不安全的问题。该方法的步骤为：1.将镁合金边角料和废屑装入上模具型腔(4)中；2.将经步骤一装有镁合金废屑的模具放入加热炉中以5～20℃/min加热速度，加热到250℃～450℃，并保温5～60min；3.取出经步骤二加热的模具并放到液压机上以320～1600Mpa的压力，对上模具型腔(4)内的镁合金边角料或废屑进行挤压，模具的挤压比为1.5∶1～400∶1，即从下模具(3)的挤压出口(5)挤压出镁合金固相合成型材(9)。本发明的方法不需熔融过程，也不需要加保护剂，操作简单、安全、成本低，该型材还具有抗拉强度高、晶粒细化的特点。
The invention relates to a solid-phase forming method of magnesium alloy waste, which belongs to the forming method of metal materials. It solves the problems that the regeneration molding of the existing magnesium alloy needs remelting process and adding covering agent, and the process is complex and unsafe. The steps of the method are as follows: 1. putting magnesium alloy scraps and scraps into the cavity (4) of the upper mold; /min heating speed, heated to 250°C-450°C, and kept warm for 5-60min; 3. Take out the mold heated in step 2 and put it on the hydraulic press with a pressure of 320-1600Mpa to align the upper mold cavity (4). Magnesium alloy leftovers or scraps are extruded, and the extrusion ratio of the mold is 1.5:1 to 400:1, that is, the magnesium alloy solid-phase synthetic profile (9) is extruded from the extrusion outlet (5) of the lower mold (3) . The method of the invention does not need a melting process and does not need to add a protective agent, and the operation is simple, safe and low in cost. The profile also has the characteristics of high tensile strength and fine crystal grains.
Description
Technical field
The invention belongs to the metal material moulding method.
Background technology
Advantages such as magnesium alloy is little owing to its density, specific strength is high, processing characteristics is superior, it is used more and more widely.The forming technique of magnesium alloy roughly has compression casting, extrusion modling, semisolid moulding.Wherein extrusion modling mainly is to make molten metal at higher forming under the pressure with solidify or carry out extrusion modling with hydraulic press with the magnesium alloy blank of certain size under suitable temperature.The renovation process of magnesium alloy will pass through reflow process at present, needs to add coverture or vacuum, complex process, and also dangerous.
Summary of the invention
The present invention needs reflow process and adds coverture and complex process in order to solve existing magnesium alloy regeneration moulding, and unsafe problem, has proposed a kind of solid phase forming method for waste of magnesium alloy, and the concrete technical scheme that addresses the above problem is as follows:
The present invention adopts the step of magnesium alloy solid phase forming method as follows:
Magnesium alloy leftover pieces and scrap are packed in the mold die cavity 4;
The mould that step 1 is equipped with magnesium alloy leftover pieces or scrap is put into heating furnace with 5～20 ℃/min firing rate, is heated to 250 ℃～450 ℃, and is incubated 5～60min;
Taking-up is through the step 2 heated mold and be put on the hydraulic press pressure with 320～1600Mpa, magnesium alloy leftover pieces or scrap in the mold die cavity 4 are pushed, the extrusion ratio of mould is 1.5: 1～400: 1, i.e. extruding outlet 5 from bed die 3 squeezes out magnesium alloy solid phase section material synthesized 9.
Stretched its tensile strength sigma that experimental results show that of the resulting material of this forming method
bCan reach more than the 300Mpa.Solid phase forming method for waste of magnesium alloy of the present invention does not need melting process; do not need with protective agent or vacuum yet; simple to operate, safety, cost are low; it is section material synthesized to produce difform magnesium alloy by the difference of bed die 3 designs, and this section bar also has the characteristics of tensile strength height, grain refinement.
Description of drawings
Fig. 1 is the structure cut-away view of the specific embodiment one magnesium alloy solid phase forming process end of a period state, and Fig. 2 is the structure cutaway view of the specific embodiment two magnesium alloy solid phase forming step 1, and Fig. 3 is the front view of pad 7.
1 is the mould cover among the figure, the 2nd, and mold, the 3rd, bed die, the 4th, the mold die cavity, the 5th, the extruding outlet, the 6th, extrusion head, the 7th, pad, the 8th, the magnesium alloy blank, the 9th, magnesium alloy is section material synthesized.
The specific embodiment
The specific embodiment one: the solid phase forming method for waste of magnesium alloy of present embodiment is realized by the following step:
(leftover pieces or scrap are of a size of long 0.1mm～5mm, in the mold die cavity 4 of packing into after wide 0.1mm～5mm) cleans with magnesium alloy leftover pieces or scrap;
The mould that step 1 is equipped with magnesium alloy leftover pieces or scrap is put into heating furnace with 5～20 ℃/min firing rate, is heated to 250 ℃～450 ℃, and is incubated 5～60min, and the heating-up temperature of mould is by the thermocouple control that is located in the mold die cavity 4;
Take out fast through the step 2 heated mold and be put on the hydraulic press pressure with 320～1600Mpa, slowly push by 6 pairs of magnesium alloy leftover pieces of extrusion head or scrap, the extrusion ratio of mould is 1.5: 1～400: 1, i.e. extruding outlet 5 from bed die 3 squeezes out section material synthesized 9 (see figure 1)s of magnesium alloy solid phase.
The specific embodiment two: present embodiment sees that the difference of the Fig. 2 and the specific embodiment one is earlier that in step 1 pad 7 is put in the bottom in the mold die cavity 4, put into magnesium alloy leftover pieces and scrap again, on hydraulic press, apply 200～1600Mpa pressure, time dimension is held in 20S～10min, be squeezed into magnesium alloy blank 8, then magnesium alloy blank 8 and pad 7 taken out from mold die cavity 4; Step 2, will bore an aperture at place in the middle of the pretreated magnesium alloy blank 8 of step 1 and thermocouple will be inserted in the aperture, again magnesium alloy blank 8 will be put back in the mold die cavity 4.Other step is identical with the specific embodiment one.
This specific embodiment is applicable to the situation of the extruding outlet 5 of the bed die 3 that magnesium alloy solid phase forming profile size is bigger.
The specific embodiment three: present embodiment (is seen Fig. 1, Fig. 2) with the specific embodiment one, two difference is to adopt the lathe grinding of AZ91D used for magnesium alloy to become chip, the interior diameter of mold die cavity 4 is 40mm, the inner diameter of steel flue of the extruding outlet 5 of bed die 3 is 12mm, extrusion ratio 11: 1, be put into and slowly be loaded on 400Mpa on the hydraulic press, squeezing out diameter is 40mm, thickness is 2.33cm magnesium alloy blank 8, mould is put into the speed heating of heating furnace with 8 ℃/min, when being heated to 350 ℃, mould being taken out from heating furnace fast be put into that the pressure with 380Mpa pushes on the hydraulic press objective table.Other step is identical with the specific embodiment one, two.
The synthetic pole of this magnesium alloy is sawn into two sections, and the diameter that all is processed into gauge length is that Φ 5 and length are 25mm, length overall is the tensile sample of 69mm, carries out stretching experiment, result elder generation extruding part tensile strength sigma
bBe 289Mpa; Back extruding part tensile strength sigma
bBe 308Mpa.
The difference of the specific embodiment four, present embodiment and the specific embodiment one, two is magnesium alloy scraps is put into mold die cavity 4, with mold heated to 250 ℃, fast mould is taken out to be placed on the hydraulic press then and push, mould extrusion ratio 44: 1, pressure is 940Mpa.Other step is identical with the specific embodiment one.
The sample drawn test that this embodiment obtains, its tensile strength reaches more than the 350Mpa.
The difference of the specific embodiment five, present embodiment and the specific embodiment one, two is magnesium alloy scraps is directly put into mold die cavity 4, with mold heated to 300 ℃, fast mould is taken out to be placed on the hydraulic press then and push, mould extrusion ratio 100: 1, pressure is 640Mpa.Other step is identical with the specific embodiment one.
The difference of the specific embodiment six, present embodiment and the specific embodiment one, two is magnesium alloy scraps is directly put into mold die cavity 4, with mold heated to 400 ℃, fast mould is taken out to be placed on the hydraulic press then and push, mould extrusion ratio 150: 1, pressure is 340Mpa.Other step is identical with the specific embodiment one.
By said method bed die 3 is designed, it is section material synthesized to prepare different types of magnesium alloy, as tubing, special-shaped material etc.
Claims (6)
1, solid phase forming method for waste of magnesium alloy is characterized in that this method comprises the following steps:
Step 1, add material:
Magnesium alloy leftover pieces and scrap are packed in the mold die cavity (4);
Step 2, heat tracing stage:
The mould that step 1 is equipped with magnesium alloy leftover pieces or scrap is put into heating furnace with 5～20 ℃/min firing rate, is heated to 250 ℃～450 ℃, and is incubated 5～60min;
Step 3, extrusion molding stage:
Taking-up is through the step 2 heated mold and be put on the hydraulic press pressure with 320～1600Mpa, magnesium alloy leftover pieces or scrap in the mold die cavity (4) are pushed, the extrusion ratio of mould is 1.5: 1～400: 1, i.e. extruding outlet (5) from bed die (3) squeezes out magnesium alloy solid phase section material synthesized (9).
2, solid phase forming method for waste of magnesium alloy according to claim 1, it is characterized in that it comprises also earlier that in step 1 pad (7) is put in the bottom in the mold die cavity (4), put into magnesium alloy leftover pieces and scrap again, on hydraulic press, apply 200～1600Mpa pressure, time dimension is held in 20S～10min, be squeezed into magnesium alloy blank (8), then magnesium alloy blank (8) and pad (7) taken out from mold die cavity (4); To in the middle of the pretreated magnesium alloy blank of step 1 (8), bore an aperture and thermocouple will be inserted in the aperture in the place in the step 2, again magnesium alloy blank (8) will be put back in the mold die cavity (4).
3, solid phase forming method for waste of magnesium alloy according to claim 1 and 2, it is characterized in that adopting the lathe grinding of AZ91D used for magnesium alloy to become chip, the interior diameter of mold die cavity (4) is 40mm, the inner diameter of steel flue of the extruding outlet (5) of bed die (3) is 12mm, extrusion ratio is 11: 1, magnesium alloy scraps is packed in the mold die cavity (4), be put into and be forced into 400Mpa on the hydraulic press, squeezing out diameter is 40mm, thickness is 2.33cm magnesium alloy blank (8), mould is put into heating furnace with the heating of the speed of 8 ℃/min, when being heated to 350 ℃, mould being taken out to be put on the hydraulic press objective table fast from heating furnace push with 380Mpa.
4, solid phase forming method for waste of magnesium alloy according to claim 1 and 2, it is characterized in that magnesium alloy scraps is directly put into mold die cavity (4), with mold heated to 250 ℃, fast mould is taken out to be placed on the hydraulic press then and push, mould extrusion ratio 44: 1, extruding force are 940Mpa.
5, solid phase forming method for waste of magnesium alloy according to claim 1 and 2, it is characterized in that magnesium alloy scraps is directly put into mold die cavity (4), with mold heated to 300 ℃, fast mould is taken out to be placed on the hydraulic press then and push, mould extrusion ratio 100: 1, extruding force are 640Mpa.
6, solid phase forming method for waste of magnesium alloy according to claim 1 and 2, it is characterized in that magnesium alloy scraps is directly put into mold die cavity (4), with mold heated to 400 ℃, fast mould is taken out to be placed on the hydraulic press then and push, mould extrusion ratio 150: 1, extruding force are 340Mpa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510010490 CN1759946A (en) | 2005-10-31 | 2005-10-31 | Solid phase forming method for waste of magnesium alloy |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510010490 CN1759946A (en) | 2005-10-31 | 2005-10-31 | Solid phase forming method for waste of magnesium alloy |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101342547B (en) * | 2008-08-19 | 2010-10-13 | 河海大学 | Automatized continuous processing equipment for T shaped corner extrusion press and its processing method |
| CN102327918A (en) * | 2011-08-08 | 2012-01-25 | 上海天灵开关厂有限公司 | Non-cutting machining method of burrs of copper bar holes |
| CN102787247A (en) * | 2012-08-23 | 2012-11-21 | 哈尔滨理工大学 | Method for regenerating aluminium-copper intermediate alloy by extruding waste copper-clad aluminium conductor and waste copper conductor for three times |
| CN109848190A (en) * | 2019-04-08 | 2019-06-07 | 马鞍山旭阳机械有限公司 | A kind of machined metal clast recycling and forming integrated equipment |
-
2005
- 2005-10-31 CN CN 200510010490 patent/CN1759946A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101342547B (en) * | 2008-08-19 | 2010-10-13 | 河海大学 | Automatized continuous processing equipment for T shaped corner extrusion press and its processing method |
| CN102327918A (en) * | 2011-08-08 | 2012-01-25 | 上海天灵开关厂有限公司 | Non-cutting machining method of burrs of copper bar holes |
| CN102327918B (en) * | 2011-08-08 | 2013-06-12 | 上海天灵开关厂有限公司 | Non-cutting machining method of burrs of copper bar holes |
| CN102787247A (en) * | 2012-08-23 | 2012-11-21 | 哈尔滨理工大学 | Method for regenerating aluminium-copper intermediate alloy by extruding waste copper-clad aluminium conductor and waste copper conductor for three times |
| CN109848190A (en) * | 2019-04-08 | 2019-06-07 | 马鞍山旭阳机械有限公司 | A kind of machined metal clast recycling and forming integrated equipment |
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Open date: 20060419 |