CN105154732B - A kind of preparation method of magnesium Tin-zinc-aluminium titanium alloy ingot - Google Patents

A kind of preparation method of magnesium Tin-zinc-aluminium titanium alloy ingot Download PDF

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CN105154732B
CN105154732B CN201510593625.8A CN201510593625A CN105154732B CN 105154732 B CN105154732 B CN 105154732B CN 201510593625 A CN201510593625 A CN 201510593625A CN 105154732 B CN105154732 B CN 105154732B
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zinc
aluminium titanium
magnesium
magnesium tin
tin
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CN105154732A (en
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程伟丽
张树志
田亮
田权伟
霍瑞
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Shanxi Huaxiang group Limited by Share Ltd
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Taiyuan University of Technology
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Abstract

The present invention relates to a kind of preparation method of magnesium Tin-zinc-aluminium titanium alloy ingot, it is low for magnesium and magnesium alloy strength, hardness is low, the situation of poor corrosion resistance, by magnesium and the tin for belonging to non-ferrous metal together, zinc, aluminium, titanium is mixed, through vacuum melting, homogenize process, Equal Channel Angular Pressing, magnesium Tin-zinc-aluminium titanium alloy ingot is made, this preparation method technique is advanced, data are accurately full and accurate, product is silvery white strip, metallographic structure compactness is good, microhardness is up to 75 89HV, tensile yield strength is up to 230 275MPa, tensile strength is up to 285 365MPa, elongation is up to 16 21.5%, it is the highly advanced method for preparing magnesium Tin-zinc-aluminium titanium alloy ingot.

Description

A kind of preparation method of magnesium Tin-zinc-aluminium titanium alloy ingot
Technical field
The present invention relates to a kind of preparation method of magnesium Tin-zinc-aluminium titanium alloy ingot, the skill that category non-ferrous alloy is prepared and applied Art field.
Background technology
Magnesium and its alloy have high specific strength, specific stiffness height, the characteristic of easy processing, often in Aeronautics and Astronautics, automobile, electronics It is applied in industry;But magnesium and its alloy mostly hardness are low, low intensity, corrosion-resistant, its application is set to receive very overall situation Limit.
In order to improve the hardness, intensity, corrosion resistance of magnesium and its alloy, the normal doped precious metal or dilute in magnesium and its alloy Great soil group material, so that its generation enhancing phase or crystal grain thinning, such as CN104099504A patents, by the way of deformation and timeliness Tri- kinds of rare earth elements of Pr, Er, Ho are added, the addition of these rare earth elements not only increases the difficulty of alloy melting, added into This, and the plasticity of material is reduced, the application of magnesium alloy materials is have impact on the contrary.
The content of the invention
Goal of the invention
The purpose of the present invention is for magnesium and magnesium alloy strength are low, hardness is low, corrosion-resistant present situation, by magnesium with belonging to together The tin of non-ferrous metal, zinc, aluminium, titanium are mixed, through vacuum melting, homogenize process, Equal Channel Angular Pressing, and magnesium Tin-zinc-aluminium titanium is made Alloy pig, to greatly improve the mechanical property of magnesium Tin-zinc-aluminium titanium alloy, expands the application of magnesium Tin-zinc-aluminium titanium alloy.
Technical scheme
The chemical substance material that the present invention is used is:Magnesium, tin, zinc, aluminium, titanium, graphite, vaseline, absolute ethyl alcohol, argon gas, It is as follows that it combines preparation consumption:With gram, milliliter, centimetre3For measurement unit
Preparation method is as follows:
(1) selected chemical substance material
The chemical substance material that uses of preparation to be carried out selected, and carry out quality, bulk purity control:
(2) retractable die is prepared
Retractable die makes of stainless steel material, and mold cavity size is 125mm × 35mm × 20mm, mold cavity table Surface roughness Ra≤0.08-0.16μm;
(3) Equal Channel Angular Pressing lubricant is prepared
Graphite 20g ± 0.001g are weighed, vaseline 30mL ± 1mL are measured, added in beaker, 10min is stirred, into thick Graphitic lubricant;
(4) Melting Magnesium Tin-zinc-aluminium titanium alloy melting liquid
The melting of magnesium Tin-zinc-aluminium titanium alloy melting liquid is carried out in vacuum melting furnace, be Frequency Induction Heating melting, Vacuumize, argon gas protects lower completion;
1. magnesium Tin-zinc-aluminium Titanium Powder is configured
Weigh magnesium powder 335.96g ± 0.001g, glass putty 32g ± 0.001g, zinc powder 24g ± 0.001g, aluminium powder 8g ± 0.001g, titanium valve 0.04g ± 0.001g, are added in quartz container, stirring mixing 10min, into magnesium Tin-zinc-aluminium Titanium Powder;
Its combination matching is:Magnesium:Tin:Zinc:Aluminium:Titanium=83.99:8:6:2:0.01;
2. vacuum melting furnace is cleared up
Vacuum melting furnace, cleaning furnace chamber and melting kettle are opened, makes it clean;
3. magnesium Tin-zinc-aluminium Titanium Powder is put
The magnesium Tin-zinc-aluminium Titanium Powder of preparation is placed in melting kettle, vacuum melting furnace is closed, and it is closed;
4. furnace air is extracted
The vavuum pump of vacuum melting furnace is opened, stove chamber air is pumped, pressure in furnace chamber is reached 100Pa;
5. argon gas is inputted to furnace chamber
Argon bottle is opened, argon gas, argon gas input speed 200cm are inputted into vacuum melting furnace furnace chamber3/ min, makes in furnace chamber Pressure is stable 1 × 105Pa;
6. heating, melting
Open the magnesium Tin-zinc-aluminium Titanium Powder in medium frequency induction heater, heating melting crucibles;
710 DEG C ± 2 DEG C of heating-up temperature, heat time 30min, after heating, into magnesium Tin-zinc-aluminium titanium alloy melting liquid;
In heating fusion process alloying reaction will occur for magnesium Tin-zinc-aluminium titanium mixing fine powders, and reaction equation is as follows:
In formula:α-Mg:Pure magnesium phase;Mg2Sn:Magnesium tin phase;Mg42Zn45Al13:Magnalium zinc phase;Ti:Pure titanium phase, heterogeneous forming core Phase;
7. pour into a mould
After melting, vacuum melting furnace is opened, melting kettle is taken out, alignment retractable die cast gate is poured into a mould, after cast Closed cast gate;
8. cool down
By in the mould after cast and its interior casting embedment fine sand, 25 DEG C are naturally cooled to;
9. it is stripped
Retractable die is opened, casting, i.e. magnesium Tin-zinc-aluminium titanium ingot casting is taken out;
10. repair, clear up, polish, clean
Magnesium Tin-zinc-aluminium titanium ingot casting is placed on steel flat board, repaired, cleared up with machinery, into 125mm × 35mm × 20mm alloy pigs;
Then each surface of sand papering alloy pig is used, is cleaned with absolute ethyl alcohol, makes it clean;
(5) homogenize process magnesium Tin-zinc-aluminium titanium ingot casting
The homogenize process of magnesium Tin-zinc-aluminium titanium ingot casting is carried out in heat-treatment furnace, is completed in ladder heating process 's;
1. magnesium Tin-zinc-aluminium titanium ingot casting is placed in heat-treatment furnace, it is closed;
2. heating furnace is opened, first order heating, 350 DEG C ± 2 DEG C of heating-up temperature, heat time 150min is carried out;
3. continue to heat up, carry out second level heating, 460 DEG C ± 2 DEG C of heating-up temperature, heat time 720min;
4. cool down, after homogenize process, magnesium Tin-zinc-aluminium titanium ingot casting is placed in water-cooling groove, 25 DEG C of water-cooling groove water temperature, quickly It is cooled to 25 DEG C;
5. Ageing Treatment
Magnesium Tin-zinc-aluminium titanium ingot casting is placed in heat-treatment furnace, progress Ageing Treatment, 105 DEG C of first order aging temperature ± 5 DEG C, aging time 22h;200 DEG C ± 5 DEG C of second level aging temperature, aging time 170h;
After Ageing Treatment, magnesium Tin-zinc-aluminium titanium ingot casting is placed in water-cooling groove, 25 DEG C of water-cooling groove water temperature is quickly cooled to 25 ℃;
6. clear up, clean magnesium Tin-zinc-aluminium titanium ingot casting surface
The magnesium Tin-zinc-aluminium titanium alloy ingot of homogenize process, Ageing Treatment is placed on steel flat board, with sand paper to its surface And periphery is polished, cleaned with absolute ethyl alcohol, made any surface finish, cleaning;
(6) Equal Channel Angular Pressing magnesium Tin-zinc-aluminium titanium alloy ingot
The Equal Channel Angular Pressing of magnesium Tin-zinc-aluminium titanium ingot casting is carried out on extruder, is completed in ECAP Die 's;
1. ECAP Die is prepared
ECAP Die is manufactured with CrWMn steel, is made up of ECAP Die, extruded rod, equal channel angular pressing The L-shaped extruding die cavity surface roughness R of compression moulda≤0.08-0.16μm;Extruded rod surface roughness Ra≤0.08-0.16μm;
2. ECAP Die is vertically arranged on the workbench of extruder, extruded rod perpendicular alignmnet L-shaped extruding die cavity Vertical die cavity, extruded rod and L-type extrude axiality≤0.001mm of the vertical die cavity of die cavity;
3. the graphitic lubricant of preparation is added in L-shaped extruding die cavity, addition is 3mL;
4. the pre-heat treatment magnesium Tin-zinc-aluminium titanium ingot casting
Magnesium Tin-zinc-aluminium titanium ingot casting is placed in heating furnace, preheated, 270 DEG C ± 5 DEG C of preheating temperature, preheating time 15min;
5. magnesium Tin-zinc-aluminium titanium ingot casting is vertically arranged in the charging aperture on ECAP Die top;
Extruded rod alignment magnesium Tin-zinc-aluminium titanium ingot casting vertically presses, and press pressure 8MPa, pressure speed 0.04-0.12mm/s;
Deviate from after magnesium Tin-zinc-aluminium titanium ingot casting deformable squeeze by discharging opening, that is, complete the extruding of the first passage;
The Equal Channel Angular Pressing of magnesium Tin-zinc-aluminium titanium ingot casting repeats four times;
It is end-product magnesium Tin-zinc-aluminium titanium alloy ingot after extruding;
(7) clean
By the magnesium Tin-zinc-aluminium titanium alloy ingot washes of absolute alcohol after extruding, make clean surface;
(8) test, analysis and characterization
The pattern of the magnesium Tin-zinc-aluminium titanium alloy ingot of preparation, color and luster, Chemical Physics performance, mechanical property are detected, divided Analysis, sign;
Metallographic structure observation analysis is carried out with metallographic microscope;
Microhardness analysis is carried out with microhardness testers;
Tensile property analysis is carried out with Material Testing Machine;
Conclusion:Magnesium Tin-zinc-aluminium titanium alloy ingot is silvery white strip, and metallographic structure compactness is good, and microhardness reaches 75- 89HV, tensile yield strength reaches 16-21.5% up to 230-275MPa, tensile strength up to 285-365MPa, elongation;
(9) store
The magnesium Tin-zinc-aluminium titanium alloy ingot of preparation is packed with soft material, and moistureproof, sun-proof, anti-acid-alkali salt corrodes, storage temperature 20 DEG C of degree, relative humidity≤10%.
Beneficial effect
The present invention has obvious advance compared with background technology, is for magnesium and its alloy strength are low, hardness is low, resistance to The situation of corrosivity difference, magnesium is mixed with belonging to the tin of non-ferrous metal, zinc, aluminium, titanium together, through vacuum melting, homogenize process, Equal Channel Angular Pressing, is made magnesium Tin-zinc-aluminium titanium alloy ingot, and this preparation method technique is advanced, data are accurately full and accurate, and product is silvery white Strip, metallographic structure compactness is good, and microhardness reaches 75-89HV, and tensile yield strength reaches 230-275MPa, and tensile strength reaches 285-365MPa, elongation reaches 16-21.5%, is the preparation method of highly advanced magnesium Tin-zinc-aluminium titanium alloy ingot.
Brief description of the drawings
Fig. 1, Melting Magnesium Tin-zinc-aluminium titanium alloy liquid status figure
Fig. 2, Equal Channel Angular Pressing magnesium Tin-zinc-aluminium titanium alloy ingot state diagram
Metallographic microstructure figure after Fig. 3, magnesium Tin-zinc-aluminium titanium alloy ingot Equal Channel Angular Pressing
Diffracted intensity collection of illustrative plates after Fig. 4, magnesium Tin-zinc-aluminium titanium alloy ingot Equal Channel Angular Pressing
Shown in figure, list of numerals is as follows:
1st, vacuum melting furnace, 2, stove seat, 3, furnace chamber, 4, escaping pipe, 5, air outlet valve, 6, workbench, 7, melting kettle, 8, in Frequency sensing heater, 9, magnesium Tin-zinc-aluminium titanium alloy melting liquid, 10, argon gas, 11, vavuum pump, 12, vacuum tube, 13, electric cabinet, 14, aobvious Display screen, 15, indicator lamp, 16, power switch, 17, Frequency Induction Heating modulator, 18, vavuum pump modulator, 19, shielded cable, 20th, wire, 21, argon bottle, 22, argon gas valve, 24, ECAP Die, 25, L-shaped extruding die cavity, 26, charging aperture, 27, go out Material mouth, 28, extruded rod, 29, magnesium Tin-zinc-aluminium titanium alloy ingot.
Embodiment
Below in conjunction with accompanying drawing, the present invention will be further described:
It is Melting Magnesium Tin-zinc-aluminium titanium alloy liquid status figure shown in Fig. 1, each portion position, annexation is correct, matches somebody with somebody according to quantity Than sequentially operating.
The value for preparing the chemical substance used is determined by the scope pre-set, with gram, milliliter, centimetre3For meter Measure unit.
The melting of magnesium Tin-zinc-aluminium titanium alloy liquid is carried out in vacuum melting furnace, is in Frequency Induction Heating, melting, is taken out Completed under vacuum, argon gas protection;
Vacuum melting furnace is vertical, and the bottom of vacuum melting furnace 1 is stove seat 2, and inside is furnace chamber 3, in the inner bottom part of furnace chamber 3 Provided with workbench 6, melting kettle 7 is put on the top of workbench 6, is medium frequency induction heater 8 outside melting kettle 7, melts It is magnesium Tin-zinc-aluminium titanium alloy melting liquid 9 to refine in crucible 7, escaping pipe 4, air outlet valve 5 is provided with the upper right quarter of vacuum melting furnace 1, in stove The right lower quadrant of seat 2 is provided with vavuum pump 11, and 11 times connection vacuum tubes 12 of vavuum pump, vacuum tube 12 is stretched into furnace chamber 3;In furnace chamber 3 by Argon gas 10 is filled;Vacuum melting furnace 1 right part be provided with electric cabinet 13, on electric cabinet 13 provided with display screen 14, indicator lamp 15, Power switch 16, Frequency Induction Heating modulator 17, vavuum pump modulator 18, electric cabinet 13 pass through shielded cable 19 and intermediate frequency sense Heater 8 is answered to connect, electric cabinet 13 is connected by wire 20 with vavuum pump 11;Argon bottle is provided with the left part of vacuum melting furnace 1 21, the top of argon bottle 21 is provided with tunger tube 22, argon gas valve 23, and the input argon gas 10 into furnace chamber 3.
It is Equal Channel Angular Pressing magnesium Tin-zinc-aluminium titanium alloy ingot state diagram shown in Fig. 2, each portion position is correct, arranges, presses by figure Sequence is operated.
ECAP Die 24 is cuboid, and die cavity is extruded provided with L-shaped in the middle part of ECAP Die 24 25, L-shaped extruding die cavity 25 top is that charging aperture 26, right side are discharging opening 27;The vertically magnesium Tin-zinc-aluminium in charging aperture 26 Titanium alloy ingot 29, and be extruded vertically downward by extruded rod 28, magnesium Tin-zinc-aluminium titanium alloy ingot 29 is moulded in L-shaped extruding die cavity 25 Property deformation, and extruded by discharging opening 27, Equal Channel Angular Pressing repeats four times;
The crimp angle of L-shaped extruding die cavity 25 is 90 °.
It is metallographic microstructure figure after magnesium Tin-zinc-aluminium titanium alloy ingot Equal Channel Angular Pressing shown in Fig. 3, shown in figure, magnesium tin zinc Aluminum titanium alloy ingot is after Equal Channel Angular Pressing, and most of region there occurs dynamic recrystallization, dynamic recrystallization zone leveling crystal grain Size is 2.13 μm, and crystallite dimension is obviously reduced, magnesium tin phase and magnalium zinc distributed mutually more even compact.
It is diffracted intensity collection of illustrative plates after magnesium Tin-zinc-aluminium titanium alloy ingot Equal Channel Angular Pressing shown in Fig. 4, shown in figure, magnesium Tin-zinc-aluminium Titanium alloy is after Equal Channel Angular Pressing, and main composition is mutually α-Mg matrixes and Mg2Sn and a small amount of Mg42Zn45Al13Phase, Mg2Sn It is mutually high-temperature stable phase, Mg42Zn45Al13For Icosahedral phases, both both contribute to the combination property of deformed Mg Tin-zinc-aluminium titanium alloy Improve.

Claims (1)

1. a kind of preparation method of magnesium Tin-zinc-aluminium titanium alloy ingot, it is characterised in that:
The chemical substance material used is:Magnesium, tin, zinc, aluminium, titanium, graphite, vaseline, absolute ethyl alcohol, argon gas, it, which is combined, prepares Consumption is as follows:With gram, milliliter, centimetre3For measurement unit
Preparation method is as follows:
(1) selected chemical substance material
The chemical substance material that uses of preparation to be carried out selected, and carry out quality, bulk purity control:
(2) retractable die is prepared
Retractable die makes of stainless steel material, and mold cavity size is 125mm × 35mm × 20mm, and mold cavity surface is thick Rugosity Ra≤0.08-0.16μm;
(3) Equal Channel Angular Pressing lubricant is prepared
Graphite 20g ± 0.001g are weighed, vaseline 30mL ± 1mL are measured, added in beaker, 10min are stirred, into thick graphite Lubricant;
(4) Melting Magnesium Tin-zinc-aluminium titanium alloy melting liquid
The melting of magnesium Tin-zinc-aluminium titanium alloy melting liquid is carried out in vacuum melting furnace, is in Frequency Induction Heating melting, is taken out true It is empty, the lower completion of argon gas protection;
1. magnesium Tin-zinc-aluminium Titanium Powder is configured
Weigh magnesium powder 335.96g ± 0.001g, glass putty 32g ± 0.001g, zinc powder 24g ± 0.001g, aluminium powder 8g ± 0.001g, titanium Powder 0.04g ± 0.001g, are added in quartz container, stirring mixing 10min, into magnesium Tin-zinc-aluminium Titanium Powder;
Its combination matching is:Magnesium:Tin:Zinc:Aluminium:Titanium=83.99:8:6:2:0.01;
2. vacuum melting furnace is cleared up
Vacuum melting furnace, cleaning furnace chamber and melting kettle are opened, makes it clean;
3. magnesium Tin-zinc-aluminium Titanium Powder is put
The magnesium Tin-zinc-aluminium Titanium Powder of preparation is placed in melting kettle, vacuum melting furnace is closed, and it is closed;
4. furnace air is extracted
The vavuum pump of vacuum melting furnace is opened, stove chamber air is pumped, pressure in furnace chamber is reached 100Pa;
5. argon gas is inputted to furnace chamber
Argon bottle is opened, argon gas, argon gas input speed 200cm are inputted into vacuum melting furnace furnace chamber3/ min, makes pressure in furnace chamber Stabilization is 1 × 105Pa;
6. heating, melting
Open the magnesium Tin-zinc-aluminium Titanium Powder in medium frequency induction heater, heating melting crucibles;
710 DEG C ± 2 DEG C of heating-up temperature, heat time 30min, after heating, into magnesium Tin-zinc-aluminium titanium alloy melting liquid;
In heating fusion process alloying reaction will occur for magnesium Tin-zinc-aluminium titanium mixing fine powders, and reaction equation is as follows:
In formula:α-Mg:Pure magnesium phase;Mg2Sn:Magnesium tin phase;Mg42Zn45Al13:Magnalium zinc phase;Ti:Pure titanium phase, heterogeneous Nucleation;
7. pour into a mould
After melting, vacuum melting furnace is opened, melting kettle is taken out, alignment retractable die cast gate is poured into a mould, closed after cast Cast gate;
8. cool down
By in the mould after cast and its interior casting embedment fine sand, 25 DEG C are naturally cooled to;
9. it is stripped
Retractable die is opened, casting, i.e. magnesium Tin-zinc-aluminium titanium ingot casting is taken out;
10. repair, clear up, polish, clean
Magnesium Tin-zinc-aluminium titanium ingot casting is placed on steel flat board, is repaired, cleared up with machinery, closed into 125mm × 35mm × 20mm Ingot;
Then each surface of sand papering alloy pig is used, is cleaned with absolute ethyl alcohol, makes it clean;
(5) homogenize process magnesium Tin-zinc-aluminium titanium ingot casting
The homogenize process of magnesium Tin-zinc-aluminium titanium ingot casting is carried out in heat-treatment furnace, is completed in ladder heating process;
1. magnesium Tin-zinc-aluminium titanium ingot casting is placed in heat-treatment furnace, it is closed;
2. heating furnace is opened, first order heating, 350 DEG C ± 2 DEG C of heating-up temperature, heat time 150min is carried out;
3. continue to heat up, carry out second level heating, 460 DEG C ± 2 DEG C of heating-up temperature, heat time 720min;
4. cool down, after homogenize process, magnesium Tin-zinc-aluminium titanium ingot casting is placed in water-cooling groove, 25 DEG C of water-cooling groove water temperature, quick cooling To 25 DEG C;
5. Ageing Treatment
Magnesium Tin-zinc-aluminium titanium ingot casting is placed in heat-treatment furnace, progress Ageing Treatment, 105 DEG C ± 5 DEG C of first order aging temperature, Aging time 22h;200 DEG C ± 5 DEG C of second level aging temperature, aging time 170h;
After Ageing Treatment, magnesium Tin-zinc-aluminium titanium ingot casting is placed in water-cooling groove, 25 DEG C of water-cooling groove water temperature is quickly cooled to 25 DEG C;
6. clear up, clean magnesium Tin-zinc-aluminium titanium ingot casting surface
The magnesium Tin-zinc-aluminium titanium ingot casting of homogenize process, Ageing Treatment is placed on steel flat board, with sand paper to its surface and periphery Polished, cleaned with absolute ethyl alcohol, made any surface finish, cleaning;
(6) Equal Channel Angular Pressing magnesium Tin-zinc-aluminium titanium alloy ingot
The Equal Channel Angular Pressing of magnesium Tin-zinc-aluminium titanium ingot casting is carried out on extruder, is completed in ECAP Die;
1. ECAP Die is prepared
ECAP Die is manufactured with CrWMn steel, is made up of ECAP Die, extruded rod, extrusion die for equal channel angular pressing The L-shaped extruding die cavity surface roughness R of toola≤0.08-0.16μm;Extruded rod surface roughness Ra≤0.08-0.16μm;
2. ECAP Die is vertically arranged on the workbench of extruder, extruded rod perpendicular alignmnet L-shaped extrudes hanging down for die cavity Straight die cavity, extruded rod extrudes axiality≤0.001mm of the vertical die cavity of die cavity with L-type;
3. the graphitic lubricant of preparation is added in L-shaped extruding die cavity, addition is 3mL;
4. the pre-heat treatment magnesium Tin-zinc-aluminium titanium ingot casting
Magnesium Tin-zinc-aluminium titanium ingot casting is placed in heating furnace, preheated, 270 DEG C ± 5 DEG C of preheating temperature, preheating time 15min;
5. magnesium Tin-zinc-aluminium titanium ingot casting is vertically arranged in the charging aperture on ECAP Die top;
Extruded rod alignment magnesium Tin-zinc-aluminium titanium ingot casting vertically presses, and press pressure 8MPa, pressure speed 0.04-0.12mm/s;
Deviate from after magnesium Tin-zinc-aluminium titanium ingot casting deformable squeeze by discharging opening, that is, complete the extruding of the first passage;
The Equal Channel Angular Pressing of magnesium Tin-zinc-aluminium titanium ingot casting repeats four times;
It is end-product magnesium Tin-zinc-aluminium titanium alloy ingot after extruding;
(7) clean
By the magnesium Tin-zinc-aluminium titanium alloy ingot washes of absolute alcohol after extruding, make clean surface;
(8) test, analysis and characterization
The pattern of the magnesium Tin-zinc-aluminium titanium alloy ingot of preparation, color and luster, Chemical Physics performance, mechanical property are detected, analyzed, table Levy;
Metallographic structure observation analysis is carried out with metallographic microscope;
Microhardness analysis is carried out with microhardness testers;
Tensile property analysis is carried out with Material Testing Machine;
Conclusion:Magnesium Tin-zinc-aluminium titanium alloy ingot is silvery white strip, and metallographic structure compactness is good, and microhardness reaches 75-89HV, is drawn Stretch yield strength and reach 16-21.5% up to 230-275MPa, tensile strength up to 285-365MPa, elongation;
(9) store
The magnesium Tin-zinc-aluminium titanium alloy ingot of preparation is packed with soft material, and moistureproof, sun-proof, anti-acid-alkali salt corrodes, storage temperature 20 DEG C, relative humidity≤10%;
The melting of described magnesium Tin-zinc-aluminium titanium alloy liquid is carried out in vacuum melting furnace, be Frequency Induction Heating, melting, Vacuumize, argon gas protects lower completion;Vacuum melting furnace is vertical, and the bottom of vacuum melting furnace (1) is stove seat (2), and inside is Furnace chamber (3), is provided with workbench (6) in the inner bottom part of furnace chamber (3), melting kettle (7) is put on the top of workbench (6), molten It is medium frequency induction heater (8) to refine outside crucible (7), and interior melting kettle (7) is magnesium Tin-zinc-aluminium titanium alloy melting liquid (9), in vacuum The upper right quarter of smelting furnace (1) is provided with escaping pipe (4), air outlet valve (5), and vavuum pump (11), vacuum are provided with the right lower quadrant of stove seat (2) Vacuum tube (12) is connected under pump (11), vacuum tube (12) is stretched into furnace chamber (3);Filled in furnace chamber (3) by argon gas (10);In vacuum The right part of smelting furnace (1) is provided with electric cabinet (13), is opened on electric cabinet (13) provided with display screen (14), indicator lamp (15), power supply (16), Frequency Induction Heating modulator (17), vavuum pump modulator (18) are closed, electric cabinet (13) is by shielded cable (19) with Frequency sensing heater (8) is connected, and electric cabinet (13) is connected by wire (20) with vavuum pump (11);In vacuum melting furnace (1) Left part is provided with argon bottle (21), and argon bottle (21) top is provided with tunger tube (22), argon gas valve (23), and is inputted into furnace chamber (3) Argon gas (10);
Described ECAP Die (24) is cuboid, is squeezed in the middle part of ECAP Die (24) provided with L-shaped Die mould chamber (25), L-shaped extruding die cavity (25) top is that charging aperture (26), right side are discharging opening (27);In charging aperture (26) Vertically magnesium Tin-zinc-aluminium titanium alloy ingot (29), and being extruded vertically downward by extruded rod (28), magnesium Tin-zinc-aluminium titanium alloy ingot (29) It is plastically deformed, and is extruded by discharging opening (27) in L-shaped extruding die cavity (25), Equal Channel Angular Pressing is repeated four times;L-shaped The crimp angle for extruding die cavity (25) is 90 °.
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CN102400135A (en) * 2011-11-05 2012-04-04 太原理工大学 Coating hot-pressing reinforcement method of magnesium-aluminum alloy plate
CN103882272A (en) * 2014-04-18 2014-06-25 重庆大学 Mg-Sn-Ti wrought magnesium alloy and preparation method thereof

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