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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Abstract
A solid-phase shaping technology for rejected Mg-alloy material includes such steps as loading the rejected Mg-alloy material (leftover and filing) in the cavity of upper die, putting the upper die in a heating furnace, heating to 250-450 deg.C, holding the temp for 5-60 min, hydraulic pressing under 320-1600 MPa on hydraulic press, and discharging the shaped Mg-alloy material from the outlet of lower die. Its advantages are high tension 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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| 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 |