CN105349862B - High tough rare earth magnesium alloy material and preparation method - Google Patents
High tough rare earth magnesium alloy material and preparation method Download PDFInfo
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Abstract
A kind of high tough rare earth magnesium alloy material, it is characterised in that the magnesium alloy materials include the component of following weight proportion：Y is that 3.0~12.4%, Zn is that 1.5~3.5%, Zr is 0.2~0.65%, Si≤0.03%, Fe≤0.05%, Ca≤0.03%, Cu≤0.01%, Ni≤0.005%, single impurity content≤0.05%, content of impurities≤0.30%, remaining is Mg, also, Y element content is more than Zn.The invention also discloses the preparation method of magnesium alloy.Tensile strength, the yield strength of alloy are effectively increased by the addition of the rare earth element of high content, has larger contribution to the raising of alloy mechanical property.
Description
Technical field
The present invention relates to a kind of magnesium alloy, the invention further relates to the preparation method of magnesium alloy.
Background technology
Magnesium and its alloy are current commercial Application most light structural metallic materials, because it has higher specific strength, ratio
Rigidity, well electromagnetically, the performance such as thermal conductivity and its damping, damping and amortization, application potential is huge；But its intensity is not high, high temperature
The shortcoming of poor-performing seriously constrains its extensive use in fields such as civilian, military projects.
The invention belongs to magnesium-rare earth containing Y, solid solubility of the Y in Mg is very high, and Mg-Y alloys have good timeliness
Reinforcing ability.Before this, widely studied for magnesium-rare earth containing Y both at home and abroad.By with other alloying elements
Rational proportion, is developed as WE33 (Mg-3%Y-2.5%Nd-0.5%Zr), WE43 (Mg-4%Y-2.25%Nd-0.5%
Zr), the technology maturation such as WE52 (Mg-5%Y-2Nd-0.4%Zr), WE54 (Mg-5.1%Y-3.2Nd-0.5%Zr) is dilute containing Y
Native magnesium alloy, and be used widely in aerospace field.
Wherein WE43 has excellent combination property and high-temperature stability, as long as 300 DEG C of its property retention 1000h, and 300
DEG C when tensile strength be 150MPa~170MPa, suitable for 250 DEG C application；WE52 after fixation rates, yield strength with
Tensile strength is respectively 183MPa and 255MPa or so；The typical room-temperature yield strength of WE54 T6 states is respectively with tensile strength
200MPa and 275MPa.
In addition, overseas utilization flash set technology in recent years, is opened by crystal grain thinning and nano-scale dispersion-strengthened phase method
Mg-Y-Zn magnesium-rare earths are sent out, the Mg97Y2Zn1 alloys of exploitation have very high tensile strength, high elevated temperature strength, Gao Ying
Variable Rate superplasticity and high thermal stability, tensile strength reach 610MPa.
Also have by adding Rare Earth Y in magnesium alloy to improve the combination property of alloy, such as Patent No. in the prior art
ZL200410081258.5 Chinese invention patent《A kind of high plastic magnesium alloy containing rare-earth yttrium》(Authorization Notice No. is
CN1297676C), wherein, Y content is no more than 2%；Can be with middle promulgated by the State Council of the referenced patent number for ZL200710011505.X
Bright patent《Effectively strengthen Mg-Zn-Y-Zr system's magnesium alloys and preparation method using rare earth element y》(Authorization Notice No. is
CN100569976C), wherein Zn/Y meets 6~15, Zn content of the content much larger than Y, and Y contents are no more than 5%；It can also join
The Chinese invention patent application for examining Application No. 201310417034.6 is disclosed《A kind of high-strength high-toughness magnesium alloy and its preparation
Technique》(publication No. is CN103498086A), wherein Y content are no more than 1.0%.The addition by Rare Earth Y of these alloys,
Really the tensile strength and yield strength of magnesium alloy is made to be improved, but it is also less than optimal, and also made progress space, and this is needed
The optimization design and substantial amounts of experiment ability creativeness for being combined weight proportion are drawn.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of high tough rare earth magnesium for the above-mentioned state of the art to close
Golden material.
Another technical problem to be solved by this invention is to provide a kind of preparation side of high tough rare earth magnesium alloy material
Method.
The present invention solve the technical scheme that is used of above-mentioned technical problem for：A kind of high tough rare earth magnesium alloy material, its
It is characterised by that the magnesium alloy materials include the component of following weight proportion：Y is that 3.0~12.4%, Zn is that 2.5~3.5%, Zr is
0.2~0.65%, Si≤0.03%, Fe≤0.05%, Ca≤0.03%, Cu≤0.01%, Ni≤0.005%, single impurity
Content≤0.05%, content of impurities≤0.30%, remaining is Mg, also, Y element content is more than Zn.
Preferably, the magnesium alloy materials include the component of following weight proportion：Y is for 11.5~12.4%, Zn
3.5%, Zr are 0.65%, Si≤0.03%, Fe≤0.05%, Ca≤0.03%, Cu≤0.01%, Ni≤0.005%, single
Impurity content≤0.05%, content of impurities≤0.30%, remaining is Mg.
A kind of preparation method of high tough rare earth magnesium alloy material, it is characterised in that comprise the following steps：
1. melting：By Mg~Y, Mg~Zr intermediate alloys and whole pure Mg enter stove plus coverture, be warming up to 750 DEG C~
780 DEG C of fully fusings, are down to after 710 DEG C~730 DEG C to add after pure Zn and stir, stand 30min~50min slagging-off plus coverture,
Stand and poured into a mould after 10min~20min；
2. cast：695~710 DEG C of pouring temperature, 75~85mm/min of casting speed, cooling water pressure 0.7 × 106~0.9
×106Pa, cooling water flow >=15m3/h；
3. preageing：Preageing solid solubility temperature, 495 DEG C~505 DEG C, preageing solution time 24h, then ingot casting come out of the stove water
Quench, continue preageing, 195 DEG C~200 DEG C of pre-age temperature, preageing time 30h~90h timeliness；
4. hot rolling：385 DEG C~410 DEG C of rolling temperature, 100~150mm/s of mill speed, general working rate ＞ 70%, passage
Working modulus 5%~25%；
5. timeliness：200 DEG C of aging temp, 24~50h of aging time.
Further, 4. step is made annealing treatment in the course of hot rolling, and condition is 380~390 DEG C of annealing temperature, annealing
Treatment time 1h.
Compared with prior art, the advantage of the invention is that：The Y rare earth elements of high level are added in magnesium alloy materials,
The integrated application of the alloying element such as reasonably combined Zn, Zr, improves the solid solubility of alloy simultaneously.Pass through the rare earth element of high content
Addition effectively increase tensile strength, the yield strength of alloy, have larger contribution to the raising of alloy mechanical property.In addition,
The magnesium alloy plate of the series low-alloy still has excellent comprehensive mechanical property.
Embodiment
The present invention is described in further detail with reference to embodiments.
Embodiment 1：The chemical composition (wt.%) of Mg-Y-Zn-Zr alloys is in the present embodiment：Y12.4, Zn3.45,
Zr0.60, Si≤0.03, Fe≤0.05, Ca≤0.03, Cu≤0.01, Ni≤0.005, single other impurities content≤0.05,
Content of impurities≤0.30, remaining is Mg.The preparation method of Mg-Y-Zn-Zr sheet alloys is entered according to the following steps in the present embodiment
OK：
First, weighed according to above-mentioned alloying component, the raw material that founding is used are high-purity magnesium ingot, pure zinc ingot, the conjunction of magnesium yttrium centre
Gold, Mg-Zr intermediate alloy；
2nd, remelting Mg~Y, Mg~Zr intermediate alloys and whole pure Mg are entered into stove plus coverture (RJ-5), are warming up to
750 DEG C of fully fusings, are down to after 730 DEG C and add stirring rod stirring after pure Zn, stand 50min slagging-off plus coverture (RJ-5), protect
Temperature stood and poured into a mould after 10min.710 DEG C of cast temperature, 75~85mm/min of casting speed, cooling water pressure 0.8 × 106~0.9 ×
106Pa, cooling water flow 16.5m3/h, obtain 200mm × 300mm × 500mm ingot casting.
3rd, ingot casting is subjected to solid solubility temperature 505 DEG C × solution time 24h+ water quenchings+200 DEG C × aging time of aging temp
30 minutes to 410 DEG C 1 hour insulation 2h are heated in 90h timeliness, room temperature shove charge；
4th, hot rolling technology：395 DEG C of start rolling temperature, 385 DEG C of finishing temperature, mill speed 120mm/s~145mm/s is total to add
Work rate 86%, pass reduction 5%~25%；
5th, sheet material intermediate annealing process：390 DEG C × annealing time of annealing temperature 1h；Once annealed through centre, it is final to obtain
28mm heavy-gauge sheetings；
6th, aging temp 200 DEG C × aging time 50h Ageing Treatments are carried out to finish to gauge sheet material, obtains magnesium alloy with high strength and ductility
Sheet material, the Materials Measurement result：Tensile strength Rm：378MPa, yield strength RP0.2：305MPa, elongation percentage A：10%.
Embodiment 2：The chemical composition (wt.%) of Mg-Y-Zn-Zr alloys is in the present embodiment：Y11.5, Zn3.5,
Zr0.65, Si≤0.03, Fe≤0.05, Ca≤0.03, Cu≤0.01, Ni≤0.005, single other impurities content≤0.05,
Content of impurities≤0.30, remaining is Mg.The preparation method of Mg-Y-Zn-Zr sheet alloys is entered according to the following steps in the present embodiment
OK：
First, weighed according to above-mentioned alloying component, the raw material that founding is used are high-purity magnesium ingot, pure zinc ingot, the conjunction of magnesium yttrium centre
Gold, Mg-Zr intermediate alloy；
2nd, remelting Mg~Y, Mg~Zr intermediate alloys and whole pure Mg are entered into stove plus coverture (RJ-5), are warming up to
780 DEG C of fully fusings, are down to after 730 DEG C and add stirring rod stirring after pure Zn, stand 30min slagging-off plus coverture (RJ-5), protect
Temperature stood and poured into a mould after 10min.705 DEG C of cast temperature, 80~85mm/min of casting speed, cooling water pressure 0.7 × 106~0.9 ×
106Pa, cooling water flow 15m3/ h, obtains 200mm × 300mm × 500mm ingot casting.
3rd, ingot casting is subjected to solid solubility temperature 505 DEG C × solution time 24h+ water quenchings+200 DEG C × aging time of aging temp
20 minutes to 410 DEG C 1 hour insulation 2h are heated in 90h timeliness, room temperature shove charge；
4th, hot rolling technology：400 DEG C of start rolling temperature, 385 DEG C of finishing temperature, mill speed 120mm/s~150mm/s is total to add
Work rate 85%, pass reduction 5%~25%；
5th, sheet material intermediate annealing process：385 DEG C × annealing time of annealing temperature 1h；Once annealed through centre, it is final to obtain
30mm heavy-gauge sheetings；
6th, aging temp 200 DEG C × aging time 50h Ageing Treatments are carried out to finish to gauge sheet material, obtains the high tough magnesium of T5 and close
Golden plate material (Rm：380MPa, RP0.2：310MPa, A：10%).
Embodiment 3：The chemical composition (wt.%) of Mg-Y-Zn-Zr alloys is in the present embodiment：Y5.5, Zn2.0,
Zr0.35, Si≤0.03, Fe≤0.05, Ca≤0.03, Cu≤0.01, Ni≤0.005, single other impurities content≤0.05,
Content of impurities≤0.30, remaining is Mg.The preparation method of Mg-Y-Zn-Zr sheet alloys is entered according to the following steps in the present embodiment
OK：
First, weighed according to above-mentioned alloying component, the raw material that founding is used are high-purity magnesium ingot, pure zinc ingot, the conjunction of magnesium yttrium centre
Gold, Mg-Zr intermediate alloy；
2nd, remelting Mg~Y, Mg~Zr intermediate alloys and whole pure Mg are entered into stove plus coverture (RJ-5), are warming up to
765 DEG C of fully fusings, are down to after 720 DEG C and add stirring rod stirring after pure Zn, stand 40min slagging-off plus coverture (RJ-5), protect
Temperature stood and poured into a mould after 10min.700 DEG C of cast temperature, 80~83mm/min of casting speed, cooling water pressure 0.7 × 106~0.85 ×
106Pa, cooling water flow 16m3/ h, obtains 200mm × 300mm × 500mm ingot casting.
3rd, ingot casting is subjected to solid solubility temperature 500 DEG C × solution time 24h+ water quenchings+200 DEG C × aging time of aging temp
25 minutes to 410 DEG C 1 hour insulation 2h are heated in 70h timeliness, room temperature shove charge；
4th, hot rolling technology：405 DEG C of start rolling temperature, 380 DEG C of finishing temperature, mill speed 125mm/s~140mm/s is total to add
Work rate 88%, pass reduction 5%~25%；
5th, sheet material intermediate annealing process：380 DEG C × annealing time of annealing temperature 1h；Once annealed through centre, it is final to obtain
24mm heavy-gauge sheetings；
6th, aging temp 200 DEG C × aging time 40h Ageing Treatments are carried out to finish to gauge sheet material, obtains magnesium alloy with high strength and ductility
Sheet material (Rm：375MPa, RP0.2：295MPa, A：16.5%).
Embodiment 4：The chemical composition (wt.%) of Mg-Y-Zn-Zr alloys is in the present embodiment：Y3.5, Zn1.5,
Zr0.25, Si≤0.03, Fe≤0.05, Ca≤0.03, Cu≤0.01, Ni≤0.005, single other impurities content≤0.05,
Content of impurities≤0.30, remaining is Mg.The preparation method of Mg-Y-Zn-Zr sheet alloys is entered according to the following steps in the present embodiment
OK：
First, weighed according to above-mentioned alloying component, the raw material that founding is used are high-purity magnesium ingot, pure zinc ingot, the conjunction of magnesium yttrium centre
Gold, Mg-Zr intermediate alloy；
2nd, remelting Mg~Y, Mg~Zr intermediate alloys and whole pure Mg are entered into stove plus coverture (RJ-5), are warming up to
750 DEG C of fully fusings, are down to after 710 DEG C and add stirring rod stirring after pure Zn, stand 50min slagging-off plus coverture (RJ-5), protect
Temperature stood and poured into a mould after 20min.695 DEG C of cast temperature, 75~80mm/min of casting speed, cooling water pressure 0.75 × 106~0.9 ×
106Pa, cooling water flow 15.5m3/ h, obtains 200mm × 300mm × 500mm ingot casting.
3rd, ingot casting is subjected to solid solubility temperature 490 DEG C × solution time 24h+ water quenchings+195 DEG C × aging time of aging temp
20 minutes to 410 DEG C 1 hour insulation 2h are heated in 35h timeliness, room temperature shove charge；
4th, hot rolling technology：400 DEG C of start rolling temperature, 385 DEG C of finishing temperature, mill speed 120mm/s~140mm/s is total to add
Work rate 95%, pass reduction 5%~25%；
5th, sheet material intermediate annealing process：380 DEG C × annealing time of annealing temperature 1h；Once annealed through centre, it is final to obtain
10mm heavy-gauge sheetings；
6th, aging temp 200 DEG C × aging time 24h Ageing Treatments are carried out to finish to gauge sheet material, obtains magnesium alloy with high strength and ductility
Sheet material (Rm：350MPa, RP0.2：280MPa, A：21%).
Embodiment 5：The chemical composition (wt.%) of Mg-Y-Zn-Zr alloys is in the present embodiment：Y3.0, Zn2.0, Zr0.2,
Si≤0.03, Fe≤0.05, Ca≤0.03, Cu≤0.01, Ni≤0.005, single other impurities content≤0.05, impurity always contains
Amount≤0.30, remaining is Mg.The preparation method of Mg-Y-Zn-Zr sheet alloys is carried out according to the following steps in the present embodiment：
First, weighed according to above-mentioned alloying component, the raw material that founding is used are high-purity magnesium ingot, pure zinc ingot, the conjunction of magnesium yttrium centre
Gold, Mg-Zr intermediate alloy；
2nd, remelting Mg~Y, Mg~Zr intermediate alloys and whole pure Mg are entered into stove plus coverture (RJ-5), are warming up to
760 DEG C of fully fusings, are down to after 715 DEG C and add stirring rod stirring after pure Zn, stand 40min slagging-off plus coverture (RJ-5), protect
Temperature stood and poured into a mould after 15min.700 DEG C of cast temperature, 75~80mm/min of casting speed, cooling water pressure 0.7 × 106~0.9 ×
106Pa, cooling water flow 16.5m3/ h, obtains 200mm × 300mm × 500mm ingot casting.
3rd, ingot casting is subjected to solid solubility temperature 500 DEG C × solution time 24h+ water quenchings+195 DEG C × aging time of aging temp
25 minutes to 410 DEG C 1 hour insulation 2h are heated in 30h timeliness, room temperature shove charge；
4th, hot rolling technology：405 DEG C of start rolling temperature, 385 DEG C of finishing temperature, mill speed 100mm/s~140mm/s is total to add
Work rate 90%, pass reduction 5%~20%；
5th, sheet material intermediate annealing process：380 DEG C × annealing time of annealing temperature 1h；Once annealed through centre, it is final to obtain
20mm heavy-gauge sheetings；
6th, aging temp 200 DEG C × aging time 24h Ageing Treatments are carried out to finish to gauge sheet material, obtains magnesium alloy with high strength and ductility
Sheet material (Rm：350MPa, RP0.2：285MPa, A：20%).
Claims (4)
1. a kind of high tough rare earth magnesium alloy material, it is characterised in that the magnesium alloy materials include the component of following weight proportion：Y
For 3.0~12.4%, Zn be 1.5~3.5%, Zr be 0.2~0.65%, Si≤0.03%, Fe≤0.05%, Ca≤
0.03%, Cu≤0.01%, Ni≤0.005%, single impurity content≤0.05%, content of impurities≤0.30%, remaining is
Mg, also, Y element content is more than Zn；The preparation method of the high tough rare earth magnesium alloy material comprises the following steps：
1. melting：By Mg~Y, Mg~Zr intermediate alloys and whole pure Mg enter stove plus coverture, are warming up to 750 DEG C~780 DEG C
Fully fusing, is down to after 710 DEG C~730 DEG C to add after pure Zn and stirs, stand 30min~50min slagging-off plus coverture, stand
Poured into a mould after 10min~20min；
2. cast：695~710 DEG C of pouring temperature, 75~85mm/min of casting speed, cooling water pressure 0.7 × 106~0.9 ×
106Pa, cooling water flow >=15m3/h；
3. preageing：Preageing solid solubility temperature, 495 DEG C~505 DEG C, preageing solution time 24h, then ingot casting come out of the stove water quenching,
Continue preageing, 195 DEG C~200 DEG C of pre-age temperature, preageing time 30h~90h；
4. hot rolling：385 DEG C~410 DEG C of rolling temperature, 100~150mm/s of mill speed, general working rate ＞ 70%, passage processing
Rate 5%~25%；
5. timeliness：200 DEG C of aging temp, 24~50h of aging time.
2. high tough rare earth magnesium alloy material according to claim 1, it is characterised in that the magnesium alloy materials include as follows
The component of weight proportion：Y is that 3.5%, Zr is 0.65%, Si≤0.03%, Fe≤0.05%, Ca for 11.5~12.4%, Zn
≤ 0.03%, Cu≤0.01%, Ni≤0.005%, single impurity content≤0.05%, content of impurities≤0.30%, remaining
For Mg.
3. the preparation method of high tough rare earth magnesium alloy material described in a kind of claim 1 or 2, it is characterised in that including following step
Suddenly：
1. melting：By Mg~Y, Mg~Zr intermediate alloys and whole pure Mg enter stove plus coverture, are warming up to 750 DEG C~780 DEG C
Fully fusing, is down to after 710 DEG C~730 DEG C to add after pure Zn and stirs, stand 30min~50min slagging-off plus coverture, stand
Poured into a mould after 10min~20min；
2. cast：695~710 DEG C of pouring temperature, 75~85mm/min of casting speed, cooling water pressure 0.7 × 106~0.9 ×
106Pa, cooling water flow >=15m3/h；
3. preageing：Preageing solid solubility temperature, 495 DEG C~505 DEG C, preageing solution time 24h, then ingot casting come out of the stove water quenching,
Continue preageing, 195 DEG C~200 DEG C of pre-age temperature, preageing time 30h~90h；
4. hot rolling：385 DEG C~410 DEG C of rolling temperature, 100~150mm/s of mill speed, general working rate ＞ 70%, passage processing
Rate 5%~25%；
5. timeliness：200 DEG C of aging temp, 24~50h of aging time.
4. preparation method according to claim 3, it is characterised in that 4. step is made annealing treatment in the course of hot rolling,
Condition is 380~390 DEG C of annealing temperature, makes annealing treatment time 1h.
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| CN113462939B (en) * | 2021-06-30 | 2022-04-15 | 赣州虔博新材料科技有限公司 | Thermal cracking resistant high-strength high-plasticity rare earth magnesium alloy and preparation method thereof |
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| JP5540780B2 (en) * | 2009-05-29 | 2014-07-02 | 住友電気工業株式会社 | Magnesium alloy wire, bolt, nut and washer |
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