CN103909382A - Large-diameter moderately-strong heat-resisting magnesium alloy thick-wall barrel-shaped piece forming process - Google Patents
Large-diameter moderately-strong heat-resisting magnesium alloy thick-wall barrel-shaped piece forming process Download PDFInfo
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- CN103909382A CN103909382A CN201410021994.5A CN201410021994A CN103909382A CN 103909382 A CN103909382 A CN 103909382A CN 201410021994 A CN201410021994 A CN 201410021994A CN 103909382 A CN103909382 A CN 103909382A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C23/00—Alloys based on magnesium
- C22C23/02—Alloys based on magnesium with aluminium as the next major constituent
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- 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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Abstract
The invention discloses a large-diameter moderately-strong heat-resisting magnesium alloy thick-wall barrel-shaped piece forming process. The process includes the steps of large-furnace smelting, semi-continuous casting, homogenizing annealing, varying-temperature multi-direction forging, mechanical punching, ring rolling forming and aging treatment. The varying-temperature multi-direction forging is conducted on an oil press, pressing speed is 200-400mm/min, upsetting reduction in pass is 30-40%, drawing down reduction in pass is 5-10%, blank before ring rolling forming is kept at the temperature of 380-400 DEG C for 4-8 hours, and rolling deformation is 60-80%. The thick-wall barrel-shaped piece 700-1100mm in outer diameter, 50-100mm in wall thickness and 300-700mm in height is manufactured. The thick-wall barrel-shaped piece is high in strength and good in heat resistance and meets size and performance requirements of structural parts in the aerospace field.
Description
Technical field
The present invention relates to magnesium alloy deformation manufacture field, particularly a kind of forging of Mg-Al-Ag series magnesium alloy and looping mill rolling distortion field.
Background technology
At present major-diameter thick-wall cylindrical member is as structural member important in aerospace field, prepares with aluminium alloy.Along with the fast development of aerospace field, material loss of weight has become an urgent demand in this field.If prepare these major-diameter thick-wall cylindrical member with magnesium alloy, can play significant weight loss effect (magnesium alloy density ratio aluminium alloy is light by 1/3rd).Utilize magnesium alloy to prepare thick walled cylinder parts difficulty larger.Magnesium alloy is Patterns for Close-Packed Hexagonal Crystal structure, and slip system is few, and normal temperature deformability is poor; The interval narrow and rapid heat dissipation of heat distortion temperature; The required billet size of major-diameter thick-wall cylindrical member is large, and it is large that blank is prepared difficulty; Lack at present the report of magnesium alloy thick walled cylinder parts forming technology that can reference.
This patent for aerospace field to the actual demand of large-diameter magnesium alloy thick walled cylinder parts, be associated gold based on a kind of Mg-Al-Ag, adopt alternating temperature multiway forging and the looping mill rolling process route combining that is shaped, design first major-diameter thick-wall cylindrical part forming process, and prepare the thick walled cylinder parts of external diameter Ф 700-1100mm, wall thickness 50-100mm, height 300-700mm.This thick walled cylinder parts is to advancing magnesium alloy to be significant in the extensive use of aerospace field.
Summary of the invention
The present invention seeks to for preparation major diameter, middle intensity heat resistance magnesium alloy thick walled cylinder parts provide a kind of practicable process route, to meet the active demand of aerospace field to large-diameter magnesium alloy thick walled cylinder parts.The forming technology that the present invention proposes is as follows.
1. the required billet size of thick walled cylinder parts is larger, adopts jumbo smelting furnace melt raw material.
2. semi-continuous casting machinery process the magnesium alloy ingot blank of diameter Ф 480-600mm.Alloy mass percentage composition: Al 7.5-9.0%, Ag 0.02-0.80%, Zn 0.35-0.55%, Mn 0.05-0.20%, RE 0.01-0.10%, Ca 0.001-0.020%, Fe≤0.02%, Si≤0.05%, Cu≤0.02%, Ni≤0.001%, all the other are Mg.Ingot casting flawless, defect is few, component segregation is little.High-quality ingot casting is that deformation after unloading is processed the powerful guarantee of carrying out smoothly.
3. for to reduce or eliminate the dendritic segregation producing in nonequilibrium solidification process, ingot casting is carried out to the processing of twin-stage homogenizing annealing.After homogenizing annealing process is 250-300 DEG C of insulation 10-12h, be warming up to 380-410 DEG C of insulation 20-30h, air cooling is to room temperature.
4. on hydraulic press, ingot blank is carried out to the multiway forging of upsetting pull formula, pressing speed 200-400mm/min, jumping-up reduction in pass 30-40%, pulling reduction in pass 5-10%, upper and lower chopping block temperature 150-200 DEG C.Before forging, ingot blank is heated to 380-410 DEG C of insulation 8-16h.In forging process when surface of ingot blank temperature is melted down annealing during lower than 350 DEG C, 370 DEG C-400 DEG C insulation 4-8h of annealing process.After annealing, repeat upsetting pull process, after more than 3 times upsetting pull, ingot blank is flattened to height 250-480mm.Multiway forging can improve magnesium alloy cast tissue, crystal grain thinning.But magnesium alloy forged temperature range is narrower, and to deformation velocity sensitivity, therefore the technological parameter such as rational forging temperature and deformation velocity is the key that forging deformation can carry out smoothly.Simultaneously these parameters are very large on being out of shape the microscopic structure impact of rear magnesium alloy, affect the mechanical property of alloy.
5. at ingot blank center machine drilling, hole dimension Ф 200-260mm.
6. on looping mill, ingot blank being carried out to a looping mill rolling is shaped, rolling reduction 60-80%, roller temperature 200-250 DEG C, the front heating of looping mill rolling ingot blank to 380 DEG C-400 DEG C of insulation 4-8h, looping mill rolling goes out the thick walled cylinder parts of external diameter Ф 700-1100mm, wall thickness 50-100mm, height 300-700mm.
7. Mg-Al-Ag is that complex magnesium alloy is that one can ageing strengthening magnesium alloy, therefore the thick walled cylinder parts after being shaped is carried out to Ageing Treatment, and its technique is 170-190 DEG C of insulation 30-40h.
8. the mechanical property of this thick walled cylinder parts is: Gao Xiang, tangentially, radially room temperature yield strength >=190MPa, tensile strength >=320MPa, percentage elongation >=6%; 150 DEG C of yield strength >=160MPa, tensile strength >=200MPa, percentage elongation >=30%.
Advantage of the present invention is as follows.
1) complete magnesium alloy thick walled cylinder parts forming technology is proposed first.From founding, forging, looping mill rolling to Ageing Treatment being shaped, each processing step combination.Under the guidance of this technique, successfully prepare large-diameter magnesium alloy thick walled cylinder parts.
2) this explained hereafter efficiency is high.In deformation process, only need heating 2-3 time, improved production efficiency, reduced production cost.Reduce the mechanical property that Repeat-heating number of times is conducive to improve magnesium alloy simultaneously.
3) magnesium alloy heat distortion temperature narrow range, to deformation velocity sensitivity, the design of its deformation parameter and control difficulty large.The present invention, by a large amount of experiments, has successfully optimized the Deformation Parameters of alloy used, and its formability is combined with good mechanical property.
4) for raising the efficiency, reduce Repeat-heating number of times, when rolling, adopt a looping mill rolling to be shaped.This requires all large (deflection >=60%) of mill speed and deflection, is unfavorable for bringing into play magnesium alloy moulding, and difficulty is shaped.The present invention adopts the process route of multiway forging+looping mill rolling combination.Improve as-cast structure crystal grain thinning with the multiway forging of aximal deformation value, thereby improve the deformability of magnesium alloy in the time of looping mill rolling.
Brief description of the drawings
Fig. 1 is the ingot blank after mechanical railway carriage, cutting, chamfered in the embodiment of the present invention 1.
Fig. 2 is the ingot blank of the embodiment of the present invention 1 after multiway forging.
Fig. 3 is the ingot blank of the embodiment of the present invention 1 after the perforation of centre.
Thick walled cylinder parts after Fig. 4 embodiment of the present invention 1 is shaped.
detailed description of the invention
embodiment 1:utilize large stove fused raw material, the Mg-8.0Al-0.5Ag-0.4Zn-0.1Mn-0.1RE-0.01Ca(wt.% that casts out diameter Ф 530mm is watered in semi-continuous casting) magnesium alloy ingot.Ingot casting carries out the processing such as mechanical railway carriage, cutting, chamfering successively, finally processes diameter Ф 480mm, the ingot blank of length 700mm, as shown in Figure 1.Ingot blank is carried out to bipolar homogenizing annealing, after annealing process is 250-300 DEG C of insulation 10-12h, be warming up to 380-410 DEG C of insulation 20-30h, air cooling is to room temperature.Ingot blank is heated to 410 DEG C of insulation 10h, on hydraulic press, ingot blank is carried out to the multiway forging of upsetting pull formula, pressing speed 200-400mm/min, jumping-up reduction in pass 30-40%, pulling reduction in pass 5-10%, upper and lower chopping block temperature 150-200 DEG C.In forging process when surface of ingot blank temperature is melted down annealing, 400 DEG C of annealing temperatures, temperature retention time 5h during lower than 350 DEG C.Melt down annealing temperature at every turn and once reduce by 10 DEG C before relatively.After annealing, repeat upsetting pull process, after 3 upsetting pulls, ingot blank is flattened to height 480mm, as shown in Figure 2.At ingot blank center machine drilling, hole dimension Ф 250mm, as shown in Figure 3.On machine for rolling ring, ingot blank is carried out to a looping mill rolling and be shaped, rolling reduction 68%, roller temperature 200-250 DEG C.Heating ingot blank to 400 DEG C insulation 8h before looping mill rolling.After shaping, thick walled cylinder parts is carried out to 180 DEG C × 30h Ageing Treatment.The thick walled cylinder parts external diameter Ф 700mm of final preparation, height 500mm, wall thickness 100mm, as shown in Figure 4.Tensile property after timeliness when room temperature and 150 DEG C is listed in respectively table 1, table 2.
embodiment 2:first utilize large stove molten alloy raw material, then the Mg-8.0Al-0.5Ag-0.4Zn-0.1Mn-0.1RE-0.02Ca(wt.% that casts out diameter Ф 550mm is watered in semi-continuous casting) alloy cast ingot.Ingot casting carries out the processing such as mechanical railway carriage, cutting, chamfering successively, finally processes diameter Ф 500mm, the ingot blank of length 780mm.Ingot blank is carried out to bipolar homogenizing annealing, after annealing process is 250-300 DEG C of insulation 10-12h, be warming up to 380-410 DEG C of insulation 20-30h, air cooling is to room temperature.400 DEG C of insulation ingot blank 16h carry out the multiway forging of upsetting pull formula to ingot blank on hydraulic press, pressing speed 200-400mm/min, jumping-up reduction in pass 30-40%, pulling reduction in pass 5-10%, upper and lower chopping block temperature 150-200 DEG C.In forging process when surface of ingot blank temperature is melted down annealing, 390 DEG C of annealing temperatures, temperature retention time 8h during lower than 350 DEG C.Melt down annealing temperature at every turn and once reduce by 10 DEG C before relatively.After annealing, repeat upsetting pull process, after 4 upsetting pulls, ingot blank is flattened to height 450mm.At ingot blank center machine drilling, hole dimension Ф 250mm.On machine for rolling ring, ingot blank is carried out to a looping mill rolling and be shaped, rolling reduction 61%, roller temperature 200-250 DEG C.Heating blank to 400 DEG C insulation 10h before looping mill rolling.After shaping, thick walled cylinder parts is carried out to 175 DEG C × 35h Ageing Treatment.The thick walled cylinder parts external diameter Ф 900mm of final preparation, height 500mm, wall thickness 100mm.Tensile property after timeliness when room temperature and 150 DEG C is listed in respectively table 1, table 2.
embodiment 3:first utilize large stove molten alloy raw material, then the Mg-9.0Al-0.8Ag-0.4Zn-0.1Mn-0.1RE-0.01Ca(wt.% that casts out diameter Ф 600mm is watered in semi-continuous casting) magnesium alloy ingot.Ingot casting carries out the processing such as mechanical railway carriage, cutting, chamfering successively, finally processes ingot blank and is of a size of diameter Ф 550mm, length 650mm.Ingot blank is carried out to bipolar homogenizing annealing, after annealing process is 250-300 DEG C of insulation 10-12h, be warming up to 380-410 DEG C of insulation 20-30h, air cooling is to room temperature.On hydraulic press, ingot blank is carried out to the multiway forging of upsetting pull formula, pressing speed 200-400mm/min, jumping-up reduction in pass 30-40%, pulling reduction in pass 5-10%, upper and lower chopping block temperature 150-300 DEG C.Before forging, ingot blank is heated to 410 DEG C of insulation 8h.In forging process when surface of ingot blank temperature is melted down annealing during lower than 350 DEG C, 390 DEG C of insulation 5h of annealing process.Melt down annealing temperature at every turn and once reduce by 20 DEG C before relatively.After more than 3 times upsetting pull, ingot blank is flattened to height 400mm.At ingot blank center machine drilling, hole dimension Ф 250mm.On machine for rolling ring, ingot blank is carried out to a looping mill rolling and be shaped, rolling reduction 75%, roller temperature 200-300 DEG C.Heating ingot blank to 380 DEG C insulation 5h before looping mill rolling.After shaping, thick walled cylinder parts is carried out to 190 DEG C × 30h Ageing Treatment.The thick walled cylinder parts external diameter Ф 1100mm of final preparation, height 500mm, wall thickness 80mm.Tensile property after timeliness when room temperature and 150 DEG C is listed in respectively table 1, table 2.
Table 1 embodiment mesospore cylindrical member room temperature tensile mechanical property
Tensile mechanical properties when 150 DEG C of thick walled cylinder parts in table 2 embodiment
Claims (3)
1. strength heatproof magnesium alloy thick walled cylinder parts forming technology in a major diameter, alloy mass percentage composition is: Al 7.5-9.0%, Ag 0.02-0.80%, Zn 0.35-0.55%, Mn 0.05-0.20%, RE 0.01-0.10%, Ca 0.001-0.020%, Fe≤0.02%, Si≤0.05%, Cu≤0.02%, Ni≤0.001%, all the other are Mg, it is characterized in that concrete technology step is:
A. large stove melting;
B. semi-continuous casting, and machinery processes the ingot blank of diameter Ф 480-600mm;
C. to ingot blank homogenizing annealing, after annealing process: 250-300 DEG C of insulation 10-12h, be warming up to 380-410 DEG C of insulation 20-30h, air cooling is to room temperature;
D. the ingot blank after homogenizing annealing is through 380-410 DEG C of insulation 8-16h, on hydraulic press, carry out the multiway forging of upsetting pull formula, pressing speed 200-400mm/min, jumping-up reduction in pass 30-40%, pulling reduction in pass 5-10%, upper and lower chopping block temperature 150-200 DEG C; When surface of ingot blank temperature is melted down annealing during lower than 350 DEG C, annealing temperature 370-400 DEG C, temperature retention time 4-8h, repeat upsetting pull process after annealing, and ingot blank flattens to 250-480mm highly after at least 3 upsetting pulls;
E. machine drilling, hole dimension Ф 200-260mm;
F. on looping mill, carrying out a looping mill rolling is shaped, before looping mill rolling, ingot blank, through 380-400 DEG C of insulation 4-8h, rolling reduction 60-80%, roller temperature 200-250 DEG C, is prepared the thick walled cylinder parts of external diameter Ф 700-1100mm, wall thickness 50-100mm, height 300-700mm;
G. thick walled cylinder parts is carried out to Ageing Treatment, aging technique: 170-190 DEG C of insulation 30-40h.
2. strength heatproof magnesium alloy thick walled cylinder parts forming technology in major diameter according to claim 1, is characterized in that: the relatively front annealing temperature of the each annealing temperature of D step reduces 10-20 DEG C.
3. strength heatproof magnesium alloy thick walled cylinder parts forming technology in a kind of major diameter according to claim 1, is characterized in that: after G step timeliness thick walled cylinder parts high to, tangentially, radially room temperature yield strength >=190MPa, tensile strength >=320MPa, percentage elongation >=6%; 150 DEG C of yield strength >=160MPa, tensile strength >=200MPa, percentage elongation >=30%.
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Cited By (17)
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| CN105290282A (en) * | 2015-11-24 | 2016-02-03 | 大冶特殊钢股份有限公司 | Manufacturing method of ultrahigh cylindrical parts |
| CN105728604A (en) * | 2014-12-10 | 2016-07-06 | 陕西宏远航空锻造有限责任公司 | Forging forming method for annular magnesium alloy forged piece with large outer diameter |
| CN106541064A (en) * | 2015-09-22 | 2017-03-29 | 首都航天机械公司 | A kind of hammer cogging process of super large-scale aluminium alloy ingot casting |
| CN106890865A (en) * | 2017-03-23 | 2017-06-27 | 中南大学 | Major diameter AQ80M magnesium alloy cakes material squeezes the integrated forming technology of forging |
| CN106944799A (en) * | 2017-03-23 | 2017-07-14 | 中南大学 | AQ80M magnesium alloys annular element squeezes forging rolling integrated technique |
| CN107022707A (en) * | 2017-03-23 | 2017-08-08 | 中南大学 | A kind of big component Technology for Heating Processing of strong high temperature resistant magnesium alloy of superelevation |
| CN107034400A (en) * | 2017-03-23 | 2017-08-11 | 中南大学 | One kind eliminates the anisotropic forging technology of big specification AQ80M magnesium alloy bearing carriers |
| CN107119219A (en) * | 2017-03-23 | 2017-09-01 | 中南大学 | Major diameter AQ80M magnesium alloy rod hot extrusion techniques |
| CN109022975A (en) * | 2018-09-09 | 2018-12-18 | 中南大学 | A method of improving AQ80M magnesium alloy strength and strain fatigue life |
| CN109759783A (en) * | 2018-12-27 | 2019-05-17 | 天津航天长征技术装备有限公司 | A kind of nearly same sex high-performance aluminium alloy cylindrical forged piece manufacturing process of three-dimensional |
| CN110000318A (en) * | 2019-03-14 | 2019-07-12 | 桂林理工大学 | A kind of magnesium alloy hard disk shell precision forging forming method |
| CN110877086A (en) * | 2019-12-13 | 2020-03-13 | 中国兵器工业第五九研究所 | Preparation method of fine-grain large-size magnesium alloy section |
| CN110878397A (en) * | 2019-12-13 | 2020-03-13 | 中国兵器工业第五九研究所 | Texture uniformity control process for large-size magnesium alloy section |
| CN111527220A (en) * | 2017-12-26 | 2020-08-11 | 株式会社Posco | Magnesium alloy sheet material and method for producing same |
| CN112589024A (en) * | 2020-11-04 | 2021-04-02 | 长沙新材料产业研究院有限公司 | Magnesium alloy forging and preparation method thereof |
| CN113635000A (en) * | 2021-08-27 | 2021-11-12 | 中国兵器工业第五九研究所 | Extrusion-rolling composite forming method for magnesium alloy ring piece |
| CN115323296A (en) * | 2022-08-25 | 2022-11-11 | 中铝洛阳铜加工有限公司 | Processing method of wide-width high-performance magnesium alloy plate |
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| CN105728604A (en) * | 2014-12-10 | 2016-07-06 | 陕西宏远航空锻造有限责任公司 | Forging forming method for annular magnesium alloy forged piece with large outer diameter |
| CN106541064A (en) * | 2015-09-22 | 2017-03-29 | 首都航天机械公司 | A kind of hammer cogging process of super large-scale aluminium alloy ingot casting |
| CN105290282A (en) * | 2015-11-24 | 2016-02-03 | 大冶特殊钢股份有限公司 | Manufacturing method of ultrahigh cylindrical parts |
| CN105290282B (en) * | 2015-11-24 | 2017-03-15 | 大冶特殊钢股份有限公司 | A kind of manufacture method of superelevation cylinder part |
| CN107022707A (en) * | 2017-03-23 | 2017-08-08 | 中南大学 | A kind of big component Technology for Heating Processing of strong high temperature resistant magnesium alloy of superelevation |
| CN106944799A (en) * | 2017-03-23 | 2017-07-14 | 中南大学 | AQ80M magnesium alloys annular element squeezes forging rolling integrated technique |
| CN107034400A (en) * | 2017-03-23 | 2017-08-11 | 中南大学 | One kind eliminates the anisotropic forging technology of big specification AQ80M magnesium alloy bearing carriers |
| CN107119219A (en) * | 2017-03-23 | 2017-09-01 | 中南大学 | Major diameter AQ80M magnesium alloy rod hot extrusion techniques |
| CN106890865B (en) * | 2017-03-23 | 2018-08-21 | 中南大学 | Major diameter AQ80M magnesium alloy cake materials squeeze forging and integrate forming technology |
| CN107119219B (en) * | 2017-03-23 | 2018-10-16 | 中南大学 | Major diameter AQ80M magnesium alloy rod hot extrusion techniques |
| CN106890865A (en) * | 2017-03-23 | 2017-06-27 | 中南大学 | Major diameter AQ80M magnesium alloy cakes material squeezes the integrated forming technology of forging |
| CN111527220A (en) * | 2017-12-26 | 2020-08-11 | 株式会社Posco | Magnesium alloy sheet material and method for producing same |
| US11773472B2 (en) | 2017-12-26 | 2023-10-03 | Posco Co., Ltd | Magnesium alloy sheet and method for producing same |
| CN109022975A (en) * | 2018-09-09 | 2018-12-18 | 中南大学 | A method of improving AQ80M magnesium alloy strength and strain fatigue life |
| CN109759783A (en) * | 2018-12-27 | 2019-05-17 | 天津航天长征技术装备有限公司 | A kind of nearly same sex high-performance aluminium alloy cylindrical forged piece manufacturing process of three-dimensional |
| CN110000318A (en) * | 2019-03-14 | 2019-07-12 | 桂林理工大学 | A kind of magnesium alloy hard disk shell precision forging forming method |
| CN110878397A (en) * | 2019-12-13 | 2020-03-13 | 中国兵器工业第五九研究所 | Texture uniformity control process for large-size magnesium alloy section |
| CN110877086A (en) * | 2019-12-13 | 2020-03-13 | 中国兵器工业第五九研究所 | Preparation method of fine-grain large-size magnesium alloy section |
| CN110878397B (en) * | 2019-12-13 | 2020-10-23 | 中国兵器工业第五九研究所 | Texture uniformity control process for large-size magnesium alloy section |
| CN112589024A (en) * | 2020-11-04 | 2021-04-02 | 长沙新材料产业研究院有限公司 | Magnesium alloy forging and preparation method thereof |
| CN113635000A (en) * | 2021-08-27 | 2021-11-12 | 中国兵器工业第五九研究所 | Extrusion-rolling composite forming method for magnesium alloy ring piece |
| CN113635000B (en) * | 2021-08-27 | 2023-08-18 | 中国兵器工业第五九研究所 | Extrusion-rolling composite forming method for magnesium alloy ring piece |
| CN115323296A (en) * | 2022-08-25 | 2022-11-11 | 中铝洛阳铜加工有限公司 | Processing method of wide-width high-performance magnesium alloy plate |
| CN115323296B (en) * | 2022-08-25 | 2024-03-12 | 中铝洛阳铜加工有限公司 | Processing method of wide magnesium alloy plate |
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