CN101264573A - Heat resisting magnesium alloy waste material solid phase synthesizing method - Google Patents
Heat resisting magnesium alloy waste material solid phase synthesizing method Download PDFInfo
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- CN101264573A CN101264573A CNA2008100644910A CN200810064491A CN101264573A CN 101264573 A CN101264573 A CN 101264573A CN A2008100644910 A CNA2008100644910 A CN A2008100644910A CN 200810064491 A CN200810064491 A CN 200810064491A CN 101264573 A CN101264573 A CN 101264573A
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- magnesium alloy
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- resistance magnesium
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Abstract
The invention relates to a solid phase synthetic method for heat-resistant magnesium alloy scraps, belonging to the technical field of metal material molding method, which aims to solve the problems that the synthesis of prior heat-resistant magnesium alloy needs the addition of covering agent in remelting process or the vacuum condition, and requires high precision of equipment, complex process but has low safety factor. The synthesis method comprises the following steps: putting the mixed scraps of heat-resistant magnesium alloy into the intracavity of the inner sleeve of an extrusion tube, putting an extrusion die into a heating furnace, preserving heat for 30 to 120 minutes after heating to 400-500 DEG C at the speed of 5-15 DEG C per minute, taking out the extrusion die and putting on an extrusion machine, pressing the heat-resistant magnesium alloy mixed scraps into a blank under the press between 200 and 1000 Pa, pressing the blank for a second time to get a solid phase synthesis heat-resistant magnesium alloy profile material or rod with a designed ratio for pressing die 4:1 to 400:1. By obviating the fusion process, the addition of covering agent, and the vacuum condition, the solid phase synthetic method for heat-resistant magnesium alloy has the advantages of low equipment precision requirement, simple technology and high safety factor.
Description
Technical field
The present invention relates to a kind of metal material moulding method.
Background technology
Heat resistance magnesium alloy since its density little, specific strength is high, specific stiffness is high, than advantages such as elastic modelling quantity height and fine heat-resisting performance, can be widely used in space flight, aviation, communication, automotive field.At present, the synthetic method of heat resistance magnesium alloy mainly is remelting and refining, need to add coverture or finish under vacuum state in the process of remelting and refining, and equipment precision requirement height, complex process, safety coefficient is low.
Summary of the invention
The objective of the invention is syntheticly need in remelting and refining process, add coverture or under vacuum state, finish for what solve existing heat resistance magnesium alloy, and equipment precision requirement height, complex process, the problem that safety coefficient is low have proposed a kind of heat resisting magnesium alloy waste material solid phase synthesizing method.
Heat resisting magnesium alloy waste material solid phase synthesizing method of the present invention is realized by following steps: one, batch mixing stirs: the rare-earth-contained magnesium alloy chip of the magnesium alloy scrap of 80-95 part and 5-20 part is mixed put into plastic bottle by ratio of weight and the number of copies, on ball mill, stir after sealing, heat resistance magnesium alloy mixing chip; Two, filler: the right-hand member of cover is provided with template in the recipient, template is two kinds of solid template and hollow templates, earlier solid template is loaded in the extrusion die, heat resistance magnesium alloy mixing chip is packed in the inner chamber that overlaps in the recipient in the extrusion die into three, heat tracing: the extrusion die that heat resistance magnesium alloy mixing chip will be housed is put into and is incubated 30-120min after heating furnace is heated to 400 ℃-550 ℃ with the firing rate of 5-15 ℃/min; Four, extruding: take out extrusion die through the step 3 heating be put on the extruder pressure with 200-1000Mpa to recipient in heat resistance magnesium alloy mixing chip in the cover push, the time of keep-uping pressure is 30s-600s, be squeezed into the heat resistance magnesium alloy blank, take out the inner chamber that the heat resistance magnesium alloy blank is overlapped in recipient then; Five, heat tracing: hollow template is loaded in the extrusion die, insert in the aperture with place's brill one aperture in the middle of the heat resistance magnesium alloy blank and with thermocouple, again the heat resistance magnesium alloy blank is put back in the inner chamber that overlaps in the recipient, the extrusion die that the heat resistance magnesium alloy blank is housed is put into be incubated 30-120min after heating furnace is heated to 400 ℃-550 ℃ with the firing rate of 5-15 ℃/min; Six, moulding: extrusion die taken out and be put on the extruder objective table pressure with 400-450Mpa fast and carry out second time and push from heating furnace, squeeze out solid phase synthetic heat resistance magnesium alloy section bar or bar the endoporus of heat resistance magnesium alloy blank from hollow template, the extrusion ratio of extrusion die design is 4: 1-400: 1.
Advantage of the present invention is: heat resistance magnesium alloy solid phase synthesis process of the present invention does not need melting process, does not need to add coverture yet, more do not need under vacuum state, to finish, and equipment precision requirement is not high, only need on extruder, can operate, technology is simple, the resulting heat resistance magnesium alloy section bar of the present invention or its tensile strength sigma of bar
bCan reach more than the 200Mpa, so the safety coefficient height.
Description of drawings
Fig. 1 is the cutaway view of the specific embodiment one heat resistance magnesium alloy solid phase building-up process end of a period mould state, and Fig. 2 is the cutaway view of the specific embodiment one heat resistance magnesium alloy solid phase synthesis step two moulds.
1 is extrusion die among the figure, the 2nd, and cover in the recipient, 2-1 are the inner chambers of cover 2 in the recipient, the 3rd, extrusion axis, the 4th, extrusion pad, the 5th, die support, the 6th, template, 6-1 is a solid template, 6-2 is a hollow template, 6-2-1 is the endoporus on the hollow template, the 7th, and die-cushion, the 8th, support pads, the 9th, the circle die mould is chewed front end, the 10th, the circle die mould is chewed sleeve pipe, and the 11st, the circle die mould is chewed the rear end, and the 12nd, heat resistance magnesium alloy mixing chip 12.
The specific embodiment
The specific embodiment one: present embodiment is described in conjunction with Fig. 1, the synthetic method of present embodiment realizes by following steps: one, batch mixing stirs: the rare-earth-contained magnesium alloy chip of the magnesium alloy scrap of 80-95 part and 5-20 part is mixed put into plastic bottle by ratio of weight and the number of copies, on ball mill, stir after sealing, heat resistance magnesium alloy mixing chip 12; Two, filler: the right-hand member of cover 2 is provided with template 6 in the recipient, template 6 is two kinds of solid template 6-1 and hollow template 6-2, earlier solid template 6-1 is loaded in the extrusion die 1, heat resistance magnesium alloy mixing chip 12 is packed among the inner chamber 2-1 of cover 2 in the recipient in the extrusion die 1 into three, heat tracing: the extrusion die 1 that heat resistance magnesium alloy mixing chip 12 will be housed is put into and is incubated 30-120min after heating furnace is heated to 400 ℃-550 ℃ with the firing rate of 5-15 ℃/min; Four, extruding: take out extrusion die 1 through the step 3 heating be put on the extruder pressure with 200-1000Mpa to recipient in heat resistance magnesium alloy mixing chip 12 in the cover 2 push, the time of keep-uping pressure is 30s-600s, be squeezed into the heat resistance magnesium alloy blank, then the heat resistance magnesium alloy blank overlapped in recipient 2 the inner chamber 2-1 and take out; Five, heat tracing: hollow template 6-2 is loaded in the extrusion die 1, insert in the aperture with place's brill one aperture in the middle of the heat resistance magnesium alloy blank and with thermocouple, again the heat resistance magnesium alloy blank is put back in the recipient among the inner chamber 2-1 of cover 2, the extrusion die 1 that the heat resistance magnesium alloy blank is housed is put into be incubated 30-120min after heating furnace is heated to 400 ℃-550 ℃ with the firing rate of 5-15 ℃/min; Six, moulding: extrusion die 1 taken out and be put on the extruder objective table pressure with 400-450Mpa fast and carry out second time and push from heating furnace, squeeze out solid phase synthetic heat resistance magnesium alloy section bar or bar the endoporus 6-2-1 of heat resistance magnesium alloy blank from hollow template 6-2, the extrusion ratio of extrusion die 1 design is 4: 1-400: 1.Adopt the resulting heat resistance magnesium alloy section bar of the present invention or bar is stretched experimental results show that: in the time of 200 ℃, its tensile strength sigma
bCan reach more than the 200Mpa.Different designs according to the endoporus 6-2-1 on the hollow template 6-2 can squeeze out difformity, and the heat resistance magnesium alloy section bar or the bar of different size, section bar after synthetic or bar have intensity height, crystal grain is tiny, hardening constituent is evenly distributed advantage.
The specific embodiment two: the difference of the present embodiment and the specific embodiment one is that the inner chamber 2-1 diameter of the interior cover 2 of recipient in the step 2 is 50-70mm.So design makes heat resistance magnesium alloy section bar or its tensile strength sigma of bar that squeezes out
bCan reach more than the 200Mpa.Other step is identical with the specific embodiment one.
The specific embodiment three: after the difference of the present embodiment and the specific embodiment one is to take out the heat resistance magnesium alloy blank of extrusion modling in the step 4, the heat resistance magnesium alloy blank is sawed the fritter of growing into 10mm-30mm, reinstall among the inner chamber 2-1 of cover 2 in the recipient in the step 5, the extrusion die 1 that the heat resistance magnesium alloy blank is housed is put into be incubated 30-120min after heating furnace is heated to 400 ℃-550 ℃ with the firing rate of 5-15 ℃/min.Squeeze out heat resistance magnesium alloy section bar or bar in the above-mentioned value range, its tensile strength sigma
bCan reach more than the 200Mpa.Other step is identical with the specific embodiment one.
The specific embodiment four: the difference of the present embodiment and the specific embodiment one is that the present invention also comprises step 7, push for the third time: extrusion die 1 is taken out to be placed on the extruder push for the third time, pressure is 400-450Mpa, and extrusion ratio is 4: 1-400: 1.Increase the extruding number of times and made that the heat resistance magnesium alloy section bar or the bar hardness that squeeze out are better, and squeezed out heat resistance magnesium alloy section bar or bar, its tensile strength sigma in the above-mentioned value range
bCan reach more than the 200Mpa.Other step is identical with the specific embodiment one.
The specific embodiment five: the difference of the present embodiment and the specific embodiment one is that the present invention also comprises step 8, the 4th extruding: will saw the fritter of growing into 10mm-30mm through the heat resistance magnesium alloy bar of step 7 extruding, pack among the inner chamber 2-1 of cover 2 in the recipient, extrusion die 1 is heated to 400 ℃-550 ℃, insulation 30-120min, fast extrusion die 1 is taken out to be placed on then and carry out the 4th extruding on the extruder, pressure is 400-450Mpa, and extrusion ratio is 4: 1-400: 1.Increase the extruding number of times and made that the heat resistance magnesium alloy section bar or the bar hardness that squeeze out are better, and squeezed out heat resistance magnesium alloy section bar or bar, its tensile strength sigma in the above-mentioned value range
bCan reach more than the 200Mpa.Other step is identical with the specific embodiment one.
The specific embodiment six: the difference of the present embodiment and the specific embodiment one is in the step 1 by ratio of weight and the number of copies that the rare-earth-contained magnesium alloy chip with 90 parts magnesium alloy scrap and 10 parts mixes and puts into plastic bottle, on ball mill, stir after sealing, heat resistance magnesium alloy mixing chip 12; In the step 2 heat resistance magnesium alloy mixing chip 12 packed among the inner chamber 2-1 of cover 2 in the recipient in the extrusion die 1, the extrusion die 1 that heat resistance magnesium alloy mixing chip 12 will be housed in the step 3 is put into and is incubated 50min after heating furnace is heated to 450 ℃ with the firing rate of 10 ℃/min; Take out in the step 4 extrusion die 1 through the step 3 heating be put on the extruder pressure with 740Mpa to recipient in heat resistance magnesium alloy mixing chip 12 in the cover 2 push, the time of keep-uping pressure is 100s, be squeezed into the heat resistance magnesium alloy blank, then the heat resistance magnesium alloy blank is overlapped in recipient 2 the inner chamber 2-1 and take out, the fritter that heat resistance magnesium alloy blank saw is grown into 20mm; In the step 5 hollow template 6-2 is loaded in the extrusion die 1, the extrusion die 1 that the heat resistance magnesium alloy blank is housed is put into be incubated 40min after heating furnace is heated to 500 ℃ with the firing rate of 10 ℃/min; In the step 6 extrusion die 1 being taken out and be put on the extruder objective table pressure with 450Mpa fast from heating furnace carries out second time and pushes, squeeze out solid phase synthetic heat resistance magnesium alloy section bar or bar the endoporus 6-2-1 of heat resistance magnesium alloy blank from hollow template 6-2, the extrusion ratio of extrusion die 1 design is 45: 1; In the step 7 extrusion die 1 taken out to be placed on the extruder and push for the third time, pressure is 430Mpa, and extrusion ratio is 56: 1; To saw the fritter of growing into 20mm through the heat resistance magnesium alloy bar of step 7 extruding in the step 8, pack among the inner chamber 2-1 of cover 2 in the recipient, extrusion die 1 is heated to 420 ℃, insulation 80min, extrusion die 1 is taken out be placed on fast then and carry out the 4th extruding on the extruder, pressure is 410Mpa, and extrusion ratio is 11: 1.
Squeeze out heat resistance magnesium alloy section bar or bar in the above-mentioned value range, its tensile strength sigma
bCan reach more than the 200Mpa.
Claims (6)
1, a kind of heat resisting magnesium alloy waste material solid phase synthesizing method, it is characterized in that said method comprising the steps of: one, batch mixing stirs: the rare-earth-contained magnesium alloy chip of the magnesium alloy scrap of 80-95 part and 5-20 part is mixed put into plastic bottle by ratio of weight and the number of copies, on ball mill, stir after sealing, heat resistance magnesium alloy mixing chip (12); Two, filler: the right-hand member of cover (2) is provided with template (6) in the recipient, template (6) is two kinds of solid template (6-1) and hollow templates (6-2), earlier solid template (6-1) is loaded in the extrusion die (1), heat resistance magnesium alloy mixing chip (12) is packed in the inner chamber (2-1) of cover (2) in the recipient in the extrusion die (1) into three, heat tracing: the extrusion die (1) that heat resistance magnesium alloy mixing chip (12) will be housed is put into and is incubated 30-120min after heating furnace is heated to 400 ℃-550 ℃ with the firing rate of 5-15 ℃/min; Four, extruding: take out extrusion die (1) through the step 3 heating be put on the extruder pressure with 200-1000Mpa to recipient in heat resistance magnesium alloy mixing chip (12) in the cover (2) push, the time of keep-uping pressure is 30s-600s, be squeezed into the heat resistance magnesium alloy blank, then the heat resistance magnesium alloy blank overlapped in recipient the inner chamber (2-1) of (2) and take out; Five, heat tracing: hollow template (6-2) is loaded in the extrusion die (1), insert in the aperture with place's brill one aperture in the middle of the heat resistance magnesium alloy blank and with thermocouple, again the heat resistance magnesium alloy blank is put back in the recipient in the inner chamber (2-1) of cover (2), the extrusion die (1) that the heat resistance magnesium alloy blank is housed is put into be incubated 30-120min after heating furnace is heated to 400 ℃-550 ℃ with the firing rate of 5-15 ℃/min; Six, moulding: extrusion die (1) taken out fast and be put on the extruder objective table pressure with 400-450Mpa and carry out second time and push from heating furnace, squeeze out solid phase synthetic heat resistance magnesium alloy section bar or bar the endoporus (6-2-1) of heat resistance magnesium alloy blank from hollow template (6-2), the extrusion ratio of extrusion die (1) design is 4: 1-400: 1.
2, heat resisting magnesium alloy waste material solid phase synthesizing method according to claim 1 is characterized in that inner chamber (2-1) diameter of the interior cover of recipient (2) in the step 2 is 50-70mm.
3, heat resisting magnesium alloy waste material solid phase synthesizing method according to claim 1, after it is characterized in that taking out the heat resistance magnesium alloy blank of extrusion modling in the step 4, the heat resistance magnesium alloy blank is sawed the fritter of growing into 10mm-30mm, reinstall in the inner chamber (2-1) of cover (2) in the recipient in the step 5, the extrusion die (1) that the heat resistance magnesium alloy blank is housed is put into be incubated 30-120min after heating furnace is heated to 400 ℃-550 ℃ with the firing rate of 5-15 ℃/min.
4, heat resisting magnesium alloy waste material solid phase synthesizing method according to claim 1, it is characterized in that the present invention also comprises step 7, push for the third time: extrusion die (1) is taken out to be placed on the extruder push for the third time, pressure is 400-450Mpa, and extrusion ratio is 4: 1-400: 1.
5, heat resisting magnesium alloy waste material solid phase synthesizing method according to claim 4, it is characterized in that the present invention also comprises step 8, the 4th extruding: will saw the fritter of growing into 10mm-30mm through the heat resistance magnesium alloy bar of step 7 extruding, pack in the inner chamber (2-1) of cover (2) in the recipient, extrusion die (1) is heated to 400 ℃-550 ℃, insulation 30-120min, fast extrusion die (1) is taken out to be placed on then and carry out the 4th extruding on the extruder, pressure is 400-450Mpa, and extrusion ratio is 4: 1-400: 1.
6, heat resisting magnesium alloy waste material solid phase synthesizing method according to claim 5, it is characterized in that in the step 1 by ratio of weight and the number of copies that rare-earth-contained magnesium alloy chip with 90 parts magnesium alloy scrap and 10 parts mixes puts into plastic bottle, on ball mill, stir after sealing, heat resistance magnesium alloy mixing chip (12); In the step 2 heat resistance magnesium alloy mixing chip (12) packed in the inner chamber (2-1) of cover (2) in the recipient in the extrusion die (1), the extrusion die (1) that heat resistance magnesium alloy mixing chip (12) will be housed in the step 3 is put into and is incubated 50min after heating furnace is heated to 450 ℃ with the firing rate of 10 ℃/min; Take out in the step 4 extrusion die (1) through the step 3 heating be put on the extruder pressure with 740Mpa to recipient in heat resistance magnesium alloy mixing chip (12) in the cover (2) push, the time of keep-uping pressure is 100s, be squeezed into the heat resistance magnesium alloy blank, then the heat resistance magnesium alloy blank is overlapped in recipient the inner chamber (2-1) of (2) and take out, the fritter that heat resistance magnesium alloy blank saw is grown into 20mm; In the step 5 hollow template (6-2) is loaded in the extrusion die (1), the extrusion die (1) that the heat resistance magnesium alloy blank is housed is put into be incubated 40min after heating furnace is heated to 500 ℃ with the firing rate of 10 ℃/min; In the step 6 extrusion die (1) being taken out fast and be put on the extruder objective table pressure with 450Mpa from heating furnace carries out second time and pushes, squeeze out solid phase synthetic heat resistance magnesium alloy section bar or bar the endoporus (6-2-1) of heat resistance magnesium alloy blank from hollow template (6-2), the extrusion ratio of extrusion die (1) design is 45: 1; In the step 7 extrusion die (1) taken out to be placed on the extruder and push for the third time, pressure is 430Mpa, and extrusion ratio is 56: 1; To saw the fritter of growing into 20mm through the heat resistance magnesium alloy bar of step 7 extruding in the step 8, pack in the inner chamber (2-1) of cover (2) in the recipient, extrusion die (1) is heated to 420 ℃, insulation 80min, fast extrusion die (1) is taken out to be placed on then and carry out the 4th extruding on the extruder, pressure is 410Mpa, and extrusion ratio is 11: 1.
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Cited By (8)
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| CN102601142A (en) * | 2012-03-16 | 2012-07-25 | 上海宇擎稀贵金属材料有限公司 | Magnesium alloy extruding-forging forming process and magnesium alloy extruding-forging forming device |
| CN102618742A (en) * | 2012-04-17 | 2012-08-01 | 太原科技大学 | Method for preparing magnesium base composite material from magnesium chips or magnesium alloy chips |
| 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 |
| CN105960324A (en) * | 2013-12-05 | 2016-09-21 | 乌尔里希·伯夫克 | Method and plant for producing extrusion billets |
| CN106734297A (en) * | 2016-11-24 | 2017-05-31 | 上海电机学院 | The T-shaped channel pressings curing that the discarded chip of titanium is remanufactured |
| CN109693083A (en) * | 2019-02-20 | 2019-04-30 | 中国兵器工业第五九研究所 | A kind of plastic molding method of big L/D ratio titanium alloy shell |
| CN109868380A (en) * | 2017-12-01 | 2019-06-11 | 南京理工大学 | A kind of preparation method of multiple dimensioned precipitation strength magnesium alloy materials |
| CN109985922A (en) * | 2017-12-29 | 2019-07-09 | 南京理工大学 | A kind of preparation method of multiple grain scale reinforced magnesium alloy material |
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2008
- 2008-05-14 CN CN2008100644910A patent/CN101264573B/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102601142A (en) * | 2012-03-16 | 2012-07-25 | 上海宇擎稀贵金属材料有限公司 | Magnesium alloy extruding-forging forming process and magnesium alloy extruding-forging forming device |
| CN102618742A (en) * | 2012-04-17 | 2012-08-01 | 太原科技大学 | Method for preparing magnesium base composite material from magnesium chips or magnesium alloy chips |
| 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 |
| CN105960324A (en) * | 2013-12-05 | 2016-09-21 | 乌尔里希·伯夫克 | Method and plant for producing extrusion billets |
| JP2017501038A (en) * | 2013-12-05 | 2017-01-12 | ブルーンケ・ウルリヒ | Method and equipment for producing extruded billets |
| CN106734297A (en) * | 2016-11-24 | 2017-05-31 | 上海电机学院 | The T-shaped channel pressings curing that the discarded chip of titanium is remanufactured |
| CN109868380A (en) * | 2017-12-01 | 2019-06-11 | 南京理工大学 | A kind of preparation method of multiple dimensioned precipitation strength magnesium alloy materials |
| CN109868380B (en) * | 2017-12-01 | 2021-09-03 | 南京理工大学 | Preparation method of multi-scale precipitation strengthening magnesium alloy material |
| CN109985922A (en) * | 2017-12-29 | 2019-07-09 | 南京理工大学 | A kind of preparation method of multiple grain scale reinforced magnesium alloy material |
| CN109693083A (en) * | 2019-02-20 | 2019-04-30 | 中国兵器工业第五九研究所 | A kind of plastic molding method of big L/D ratio titanium alloy shell |
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