CN114074157A - Forging process of high-strength ZK60A magnesium alloy round bar - Google Patents
Forging process of high-strength ZK60A magnesium alloy round bar Download PDFInfo
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- CN114074157A CN114074157A CN202010814766.9A CN202010814766A CN114074157A CN 114074157 A CN114074157 A CN 114074157A CN 202010814766 A CN202010814766 A CN 202010814766A CN 114074157 A CN114074157 A CN 114074157A
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- magnesium alloy
- forging
- round bar
- zk60a
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- 238000005242 forging Methods 0.000 title claims abstract description 67
- 229910000861 Mg alloy Inorganic materials 0.000 title claims abstract description 64
- 238000000034 method Methods 0.000 title claims abstract description 32
- 238000010438 heat treatment Methods 0.000 claims abstract description 34
- 238000005096 rolling process Methods 0.000 claims abstract description 28
- 238000003825 pressing Methods 0.000 claims abstract description 12
- 238000005266 casting Methods 0.000 claims abstract description 7
- 238000007514 turning Methods 0.000 claims description 8
- 238000001816 cooling Methods 0.000 claims description 7
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 6
- 229910052749 magnesium Inorganic materials 0.000 claims description 6
- 239000011777 magnesium Substances 0.000 claims description 6
- 238000002844 melting Methods 0.000 claims description 6
- 230000008018 melting Effects 0.000 claims description 6
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 6
- 238000003801 milling Methods 0.000 claims description 5
- 230000007547 defect Effects 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims description 4
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 claims description 3
- 229910001093 Zr alloy Inorganic materials 0.000 claims description 3
- 238000005485 electric heating Methods 0.000 claims description 3
- 238000000265 homogenisation Methods 0.000 claims description 3
- QRNPTSGPQSOPQK-UHFFFAOYSA-N magnesium zirconium Chemical compound [Mg].[Zr] QRNPTSGPQSOPQK-UHFFFAOYSA-N 0.000 claims description 3
- 239000003345 natural gas Substances 0.000 claims description 3
- 238000003303 reheating Methods 0.000 claims description 3
- 239000002904 solvent Substances 0.000 claims description 3
- 229910052726 zirconium Inorganic materials 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000000956 alloy Substances 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 235000015842 Hesperis Nutrition 0.000 description 1
- 235000012633 Iberis amara Nutrition 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 238000003556 assay Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/002—Hybrid process, e.g. forging following casting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/22—Moulds for peculiarly-shaped castings
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0075—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for rods of limited length
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/06—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of magnesium or alloys based thereon
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Forging (AREA)
Abstract
A forging process of a high-strength ZK60A magnesium alloy round bar comprises the following process flow steps: casting a round rod → homogenizing heat treatment of the round rod → heat treatment of the round rod before forging and rolling → a forging and pressing process; the method has simple and easy process, not only can fully meet various performance indexes of ZK60A forged products, but also can improve the yield of the products to more than 96 percent, and reduces the cost of ZK60A magnesium alloy products.
Description
Technical Field
The invention relates to the technical field of magnesium alloy forging and rolling, in particular to a forging process of a high-strength ZK60A magnesium alloy round bar.
Background
The ZK60A magnesium alloy material not only has excellent organic matter resistance and corrosion resistance, but also has high specific strength, large specific modulus of elasticity, good heat dissipation, good compression resistance and shock resistance, larger impact load bearing capacity than aluminum alloy, higher compression strength and yield strength, and good formability and weldability. At present, the composite material is generally used for manufacturing robots, unmanned planes, airplane skins, cabin doors, rocker arms of operating systems, supports, spacecrafts, rockets, missile structural parts and the like. However, in actual production, if the alloy is directly rolled by a hot rolling mill, the yield is extremely low, and the outstanding performance of the alloy per se cannot reach the optimal state, so that the requirement of the current manufacturing field cannot be met, and the requirement of multi-field manufacturing can be met only by improving the density and the strength of the ZK60A magnesium alloy through a forging and rolling process. The whole forging and rolling process comprises the steps of casting, turning and milling, flaw detection, heat treatment, re-turning and milling of the ZK60A round bar, bar preheating temperature, heat preservation time, forging and rolling temperature, forging and rolling speed, and the deformation direction, specification and size of the round bar, and the like all have strict requirements.
In view of the above, a forging process of high-strength ZK60A magnesium alloy round bar has been developed.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a forging process of a high-strength ZK60A magnesium alloy round bar, which is simple and feasible, can fully meet various performance indexes of ZK60A forged and rolled products, can improve the yield of the products to more than 96 percent, and reduces the cost of ZK60A magnesium alloy products.
In order to achieve the purpose, the invention adopts the following technical scheme: a forging process of a high-strength ZK60A magnesium alloy round bar comprises the following process flow steps: casting of round bar → homogenizing heat treatment of round bar → heat treatment of round bar before forging and rolling → forging process.
Step one, casting a round bar: putting 1.48-1.52 tons of magnesium ingots with the magnesium content of 99.93-99.97 percent into a crucible of a melting furnace phi 1000 x 1600mm, adding 23-27kg of a second solvent, heating and melting by using an electric heating furnace, adding 33-37kg of magnesium-zirconium alloy with the zirconium content of 28-32 percent when the temperature is increased to 770 ℃ of 730-;
secondly, homogenizing and heat treating the round bar: sawing a ZK60A magnesium alloy cast rod with the diameter of 500mm, wherein the sawing length is as follows: each section is 890-910mm, and turning and milling are carried out to form a magnesium alloy round bar, and the magnesium alloy round bar is placed into a resistance furnace for carrying out homogenization heat treatment after being subjected to digital ultrasonic flaw detection and being free of defects, wherein the heat treatment time is 10-14 hours, and the method specifically comprises the following steps: raising the temperature of the hearth to 280-type 320 ℃ within 320min for 280-type, preserving the heat for 140min, raising the temperature of the hearth to 350-type 410 ℃ within 40-80min, preserving the heat for 220-type 260min, then closing a power supply of the resistance furnace, naturally cooling for 320min for 280-type, then opening a furnace cover, naturally cooling to the normal temperature, moving the round rod out of the hearth, and waiting for the next processing;
thirdly, performing heat treatment on the round bar before forging and rolling: before forging and rolling, firstly, placing the magnesium alloy round bar in a natural gas heating furnace, and carrying out heating treatment for 20-24 hours, wherein the method comprises the following specific steps: raising the temperature of the hearth to 400 ℃ in the temperature range of 300-;
fourthly, forging and pressing: heating a forging pad to 240-plus 280 ℃, moving a magnesium alloy round rod which is kept at 400-plus 420 ℃ to the upper part of the forging pad through a manipulator clamp and vertically placing the magnesium alloy round rod on a position corresponding to a hammer head of a forging and rolling machine, wherein the forging and rolling machine is 3000 tons, the hammer head is rectangular, then the hammer head of the forging and rolling machine is lowered at the speed of 180mm/min plus 130-plus, the magnesium alloy round rod is pressed downwards, the hammer head is quickly raised once after forging and rolling, the magnesium alloy round rod is placed in a side-turning mode through the manipulator clamp, after the magnesium alloy round rod is placed stably, the hammer head is lowered at the speed of 140mm/min plus 100-plus, the magnesium alloy round rod is forged and pressed into a hexagonal shape, and in the forging and rolling process, the temperature of a magnesium alloy ingot cannot be lower than 390 ℃ plus 360-plus, otherwise, reheating is needed for forging and pressing;
and (3) vertically and stably placing the forged hexagonal magnesium alloy ingot above the forging pad by using mechanical pliers, aligning the hexagonal magnesium alloy ingot with the position of the hammer head, keeping the temperature of the magnesium alloy ingot above 380 ℃ at 360-.
The invention has the beneficial effects that: the process is simple and easy to implement, can not only fully meet various performance indexes of ZK60A forged and rolled products, but also improve the yield of the products to more than 96 percent, and reduce the cost of ZK60A magnesium alloy products.
Detailed Description
The present invention will be described in further detail with reference to the following examples and embodiments:
example 1
Putting 1500kg of magnesium ingot with 99.95% of magnesium content into a crucible of a melting furnace, adding 25kg of solvent II, heating and melting by adopting an electric heating furnace, adding 35kg of magnesium-zirconium alloy with 30% of zirconium content when the temperature is increased to 750 ℃, stirring for 20 minutes by argon, cooling to 700 ℃, adding 80kg of zinc ingot with 99% of zinc content, stirring for 15 minutes again, carrying out chemical component assay, adding 20kg of refining agent to refine for 20 minutes after the components are qualified, standing for 40 minutes, starting a casting machine and a cooling water jacket, adding 20kg of refining agent V, and manufacturing a ZK60A magnesium alloy cast rod with phi of 500 mm;
secondly, homogenizing and heat treating the round bar: sawing a ZK60A magnesium alloy cast rod with the diameter of 500mm, wherein the sawing length is as follows: 900mm, turning and milling to form a magnesium alloy round bar with phi 420 x 900mm, performing digital ultrasonic flaw detection without defects, putting the round bar into a resistance furnace for homogenization heat treatment, wherein the heat treatment time is 12 hours, and the concrete steps are as follows: heating the hearth to 300 ℃ within 300min, preserving heat for 120min, heating the hearth to 380 ℃ within 60min, preserving heat for 120min, then closing a power supply of the resistance furnace, naturally cooling for 300min, then opening a furnace cover, naturally cooling to normal temperature, moving the round bar out of the hearth, and waiting for the next processing;
thirdly, performing heat treatment on the round bar before forging and rolling: before forging and rolling, firstly, placing a magnesium alloy round bar in a natural gas heating furnace, and carrying out heating treatment for 22 hours, wherein the method comprises the following specific steps: heating the hearth to 350 ℃ within 360min, preserving heat, heating the hearth to 390 ℃ within 480min, preserving heat, heating the hearth to 410 ℃ within 480min, preserving heat, taking out of the furnace, and forging and rolling;
fourthly, forging and pressing: heating a forging pad to 260 ℃, moving a magnesium alloy round rod which is kept at the temperature of 410 ℃ to the upper side of the forging pad through a mechanical hand clamp and vertically placing the magnesium alloy round rod at a position corresponding to a hammer head of a forging and rolling machine, wherein the forging and rolling machine is 3000 tons, the hammer head is rectangular, then lowering the hammer head of the forging and rolling machine at the speed of 150mm/min, pressing down the magnesium alloy round rod, rapidly lifting the hammer head once after forging and pressing, laterally turning the magnesium alloy round rod by the mechanical hand clamp, placing the magnesium alloy round rod stably, then lowering the hammer head at the speed of 120mm/min to forge the magnesium alloy round rod, and so on, pressing the magnesium alloy round rod into a hexagonal shape, wherein in the forging and pressing process, the temperature of a magnesium alloy ingot cannot be lower than 380 ℃, or else, reheating is needed for forging and pressing;
and (3) vertically and stably placing the forged hexagonal magnesium alloy ingot above the forging pad by using mechanical pliers, aligning the forging pad with the position of the hammer head, keeping the temperature of the magnesium alloy ingot above 370 ℃, then forging and pressing the hexagonal magnesium alloy ingot by using the hammer head at the speed of 160mm/min, and continuously adjusting the position of the magnesium alloy ingot by using the mechanical pliers until the magnesium alloy ingot is forged and pressed into the required magnesium alloy forging specification.
Claims (5)
1. A forging process of a high-strength ZK60A magnesium alloy round bar is characterized by comprising the following steps: the process flow comprises the following steps: casting of round bar → homogenizing heat treatment of round bar → heat treatment of round bar before forging and rolling → forging process.
2. The forging process of the high-strength ZK60A magnesium alloy round bar according to claim 1, wherein the forging process comprises the following steps:
casting the round bar: putting 1.48-1.52 tons of magnesium ingots with the magnesium content of 99.93-99.97 percent into a crucible of a melting furnace phi 1000 x 1600mm, adding 23-27kg of a second solvent, heating and melting by using an electric heating furnace, adding 33-37kg of magnesium-zirconium alloy with the zirconium content of 28-32 percent when the temperature is increased to 770 ℃ of 730-.
3. The forging process of the high-strength ZK60A magnesium alloy round bar according to claim 1, wherein the forging process comprises the following steps:
the homogenizing heat treatment of the round bar comprises the following steps: sawing a ZK60A magnesium alloy cast rod with the diameter of 500mm, wherein the sawing length is as follows: each section is 890-910mm, and turning and milling are carried out to form a magnesium alloy round bar, and the magnesium alloy round bar is placed into a resistance furnace for carrying out homogenization heat treatment after being subjected to digital ultrasonic flaw detection and being free of defects, wherein the heat treatment time is 10-14 hours, and the method specifically comprises the following steps: and raising the temperature of the hearth to 280-320 ℃ within 320min for 280-140 ℃, preserving the heat for 140min, raising the temperature of the hearth to 350-410 ℃ within 40-80min, preserving the heat for 220-260min, then closing the power supply of the resistance furnace, naturally cooling for 320min for 280-80 ℃, then opening the furnace cover, naturally cooling to the normal temperature, removing the round rod out of the hearth, and waiting for the next processing.
4. The forging process of the high-strength ZK60A magnesium alloy round bar according to claim 1, wherein the forging process comprises the following steps:
the round bar before forging and rolling is subjected to heat treatment: before forging and rolling, firstly, placing the magnesium alloy round bar in a natural gas heating furnace, and carrying out heating treatment for 20-24 hours, wherein the method comprises the following specific steps: the temperature of the hearth is increased to 400 ℃ in the temperature range of 300-.
5. The forging process of the high-strength ZK60A magnesium alloy round bar according to claim 1, wherein the forging process comprises the following steps:
the forging and pressing process comprises the following steps: heating a forging pad to 240-plus 280 ℃, moving a magnesium alloy round rod which is kept at 400-plus 420 ℃ to the upper part of the forging pad through a manipulator clamp and vertically placing the magnesium alloy round rod on a position corresponding to a hammer head of a forging and rolling machine, wherein the forging and rolling machine is 3000 tons, the hammer head is rectangular, then the hammer head of the forging and rolling machine is lowered at the speed of 180mm/min plus 130-plus, the magnesium alloy round rod is pressed downwards, the hammer head is quickly raised once after forging and rolling, the magnesium alloy round rod is placed in a side-turning mode through the manipulator clamp, after the magnesium alloy round rod is placed stably, the hammer head is lowered at the speed of 140mm/min plus 100-plus, the magnesium alloy round rod is forged and pressed into a hexagonal shape, and in the forging and rolling process, the temperature of a magnesium alloy ingot cannot be lower than 390 ℃ plus 360-plus, otherwise, reheating is needed for forging and pressing;
and (3) vertically and stably placing the forged hexagonal magnesium alloy ingot above the forging pad by using mechanical pliers, aligning the hexagonal magnesium alloy ingot with the position of the hammer head, keeping the temperature of the magnesium alloy ingot above 380 ℃ at 360-.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202010814766.9A CN114074157B (en) | 2020-08-13 | 2020-08-13 | Forging process of high-strength ZK60A magnesium alloy round bar |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010814766.9A CN114074157B (en) | 2020-08-13 | 2020-08-13 | Forging process of high-strength ZK60A magnesium alloy round bar |
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| Publication Number | Publication Date |
|---|---|
| CN114074157A true CN114074157A (en) | 2022-02-22 |
| CN114074157B CN114074157B (en) | 2024-02-02 |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102581058A (en) * | 2012-02-27 | 2012-07-18 | 江苏诚德钢管股份有限公司 | Production method for forging magnesium alloy plate under conditions of temperature reduction and large pressing quantity |
| CN104313522A (en) * | 2014-09-28 | 2015-01-28 | 洛阳镁鑫合金制品有限公司 | Homogenization treatment process of ZK61M magnesium alloy slab ingots |
| CN104384411A (en) * | 2014-09-28 | 2015-03-04 | 洛阳镁鑫合金制品有限公司 | Magnesium alloy slab ingot forging and rolling process |
| CN104384409A (en) * | 2014-09-28 | 2015-03-04 | 洛阳镁鑫合金制品有限公司 | Process for heating ZK61M magnesium alloy slab ingot before forge rolling |
| CN104438995A (en) * | 2014-09-28 | 2015-03-25 | 洛阳镁鑫合金制品有限公司 | Process for forging and rolling ZK61M magnesium alloy slab ingot |
| CN104438996A (en) * | 2014-09-28 | 2015-03-25 | 洛阳镁鑫合金制品有限公司 | ZK61M magnesium alloy slab ingot forging and rolling process |
| CA2955324A1 (en) * | 2016-01-28 | 2017-07-28 | Daido Steel Co., Ltd. | Method for manufacturing alloy ingot |
| EP3650567A1 (en) * | 2018-11-08 | 2020-05-13 | Citic Dicastal Co., Ltd. | High-strength and high-toughness magnesium alloy and preparation method thereof |
-
2020
- 2020-08-13 CN CN202010814766.9A patent/CN114074157B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102581058A (en) * | 2012-02-27 | 2012-07-18 | 江苏诚德钢管股份有限公司 | Production method for forging magnesium alloy plate under conditions of temperature reduction and large pressing quantity |
| CN104313522A (en) * | 2014-09-28 | 2015-01-28 | 洛阳镁鑫合金制品有限公司 | Homogenization treatment process of ZK61M magnesium alloy slab ingots |
| CN104384411A (en) * | 2014-09-28 | 2015-03-04 | 洛阳镁鑫合金制品有限公司 | Magnesium alloy slab ingot forging and rolling process |
| CN104384409A (en) * | 2014-09-28 | 2015-03-04 | 洛阳镁鑫合金制品有限公司 | Process for heating ZK61M magnesium alloy slab ingot before forge rolling |
| CN104438995A (en) * | 2014-09-28 | 2015-03-25 | 洛阳镁鑫合金制品有限公司 | Process for forging and rolling ZK61M magnesium alloy slab ingot |
| CN104438996A (en) * | 2014-09-28 | 2015-03-25 | 洛阳镁鑫合金制品有限公司 | ZK61M magnesium alloy slab ingot forging and rolling process |
| CA2955324A1 (en) * | 2016-01-28 | 2017-07-28 | Daido Steel Co., Ltd. | Method for manufacturing alloy ingot |
| EP3650567A1 (en) * | 2018-11-08 | 2020-05-13 | Citic Dicastal Co., Ltd. | High-strength and high-toughness magnesium alloy and preparation method thereof |
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