CN1318633C - Method for processing specific shape-changing magnesium and magnesium alloy plate strip - Google Patents
Method for processing specific shape-changing magnesium and magnesium alloy plate strip Download PDFInfo
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- CN1318633C CN1318633C CN 200510017985 CN200510017985A CN1318633C CN 1318633 C CN1318633 C CN 1318633C CN 200510017985 CN200510017985 CN 200510017985 CN 200510017985 A CN200510017985 A CN 200510017985A CN 1318633 C CN1318633 C CN 1318633C
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Abstract
The present invention relates to a method for processing specially-deformed magnesium and magnesium alloy plate strips. The present invention adopts the processes of proportioning and smelting, semi-continuous casting (ingot blanks), saw cutting, face milling, flaw detection, homogenizing heat treatment, heating, hot rolling (to a certain thickness), on-line cooling, hot rolling, low-temperature heat treatment and product inspection, wherein qualified magnesium and magnesium alloy cast ingots are heated to 440 to 510 DEG C, and the heat is preserved for more than 1 hour; the qualified magnesium and magnesium alloy cast ingots are rolled in hot to have the thickness of 1.149 to 1.429 times that of a finished product according to the thickness requirements of the finished product; the qualified magnesium and magnesium alloy cast ingots are cooled to 180 to 280 DEG C on line and then rolled in hot to have the thickness of the finished product, the adopted working rate of reserved residual terminal chief passes is from 13 to 30%; low-temperature heat treatment adopts an annealing furnace to carry out annealing, the annealing temperature is controlled within the range of 150 to 190 DEG C, low-temperature heat treatment is carried out, the holding time is more than 1 hour, and then the qualified magnesium and magnesium alloy cast ingots are taken out of the annealing furnace and naturally cooled. The present invention has short process, low energy consumption and low cost.
Description
Technical field:
The present invention relates to technical field of nonferrous metal processing, the working method of a kind of deformed Mg and magnesium alloy plate and belt.
Background technology:
At present, in the deformed Mg and the magnesium alloy plate and belt course of processing, employing be that hot rolling technology is: batching and melting-semicontinuous casting (ingot blank)-sawing-mill face-flaw detection-homogenizing thermal treatment-heating-hot rolling-annealing-finishing-surface treatment-goods are packed technologies such as warehouse-in; Adopt this hot rolling technology, the product limitation is big, and state only can reach H112, tensile strength 235-258MPa, yield strength 160-189MPa; Along with the continuous development of aeronautical and space technology, higher tensile strength and the yield strength of material requirements for aerospace are used do not reach the requirement of H24 state.
For reaching the idio-morphosis magnesium alloy plate and belt of producing the H24 state, what some manufacturer adopted is that warm-rolling or cold-rolling process are: batching and melting-semicontinuous casting (ingot blank)-sawing-mill face-flaw detection-homogenizing thermal treatment-heating-hot rolling-warm-rolling/cold rolling-annealing-finishing-surface treatment-technologies such as goods packing warehouse-in, but this also can only produce the thin plate band.
Summary of the invention:
In order to overcome the deficiencies in the prior art, the invention provides the working method of a kind of deformed Mg and magnesium alloy plate and belt, can significantly improve the mechanical property of magnesium alloy, solve the difficult problem that magnesium alloy plate can not be produced H24 state plate of moderate thickness, increase the kind of wrought magnesium alloys product.
For achieving the above object, the present invention adopts following technical scheme:
The working method of described deformed Mg and magnesium alloy plate and belt is widely used in aerospace deformation magnesium alloy plate band, tensile strength 255-282Mpa; Yield strength 187-234MPa; The concrete production technique that adopts is: batching and melting---the semicontinuous casting ingot blank---and sawing---mill face---flaw detection---homogenizing thermal treatment---heating---be hot-rolled down to certain thickness---online cooling---hot rolling once more---low-temperature heat treatment---inspection after construction: in its operation:
Its heating process: magnesium and the qualified ingot casting of magnesium alloy are heated to 440～510 ℃, are incubated 1-3 hour;
Its hot-rolled process:, be hot-rolled down to 1.149～1.429 of finished product thickness multiple according to the finished product thickness requirement;
Its online cooling process: online cooling is reduced to 180～280 ℃;
It is hot-rolled process once more: be rolled to finished product thickness, adopt and reserve the total pass reduction of remaining finish to gauge 13～30%;
Its low-temperature heat treatment; Adopt annealing furnace to anneal, annealing temperature is controlled between 150～190 ℃, carries out low-temperature heat treatment, and is incubated more than 1 hour, comes out of the stove then to carry out naturally cooling and get final product.
Owing to adopted technical scheme as mentioned above, the present invention has following positively effect:
The present invention is by relying on control metal finishing temperature, the total pass reduction of finish to gauge, carry out the method for work hardening, obtain the H24 state of this product, promptly utilize Plastic Deformation and according to the processing characteristics of metal, different thickness requirement at goods, design the total pass reduction of different finishing temperatures and finish to gauge, control the final performance of goods, and adopt low-temperature heat treatment to eliminate the unrelieved stress that exists in the metal.
Adopt deformation magnesium alloy plate band technological method for processing of the present invention, can enlarge the existing technology product mechanical property scope that is beyond one's reach, solve the defective that existing processing method exists, flow process is short, characteristic of low energy consumption thereby have, and significantly improve the mechanical property of magnesium alloy, solved the difficult problem that the magnesium alloy plate of moderate thickness can't be produced H24 state product, for the field has been widened in magnesium alloy board production.
The wrought magnesium alloys plate of moderate thickness band that adopts the inventive method to produce, tensile strength can reach 255-282MPa; Yield strength can reach 187-234MPa; Can be widely used in aerospace field.
The drawing explanation:
Fig. 1 is the processing process figure of deformed Mg and magnesium alloy plate and belt:
Embodiment one:
To produce wrought magnesium alloys AZ31, specification is: the sheet material of 9.525X1000X2500mm is example:
Technology is prepared burden and melting routinely---the semicontinuous casting ingot blank---sawing---mill face---flaw detection---operations such as homogenizing thermal treatment are processed into ingot blank;
Heating: magnesium and the qualified ingot casting of magnesium alloy are put into process furnace, ingot casting is heated to 470 ℃, be incubated 2 hours.
Hot rolling: the ingot casting after will heating is hot-rolled down to 13mm;
Online cooling: hot rolling blank is cooled to 230 ℃;
Hot rolling once more: continue heat and be rolling to 9.525mm;
Subzero treatment: the annealing furnace of packing into of the sheet material after will rolling carries out subzero treatment, and 180 ℃ of Heating temperatures are incubated 1.5 hours;
Inspection after construction: warehousing after passing.
Embodiment two:
The sheet material that is of a size of 12X1000X2000mm with production wrought magnesium alloys AZ41M is example:
Technology is prepared burden and melting routinely---the semicontinuous casting ingot blank---sawing---mill face---flaw detection---operations such as homogenizing thermal treatment are processed into ingot blank;
Heating: magnesium and the qualified ingot casting of magnesium alloy are put into process furnace, ingot casting is heated to 480 ℃, be incubated 3 hours.
Hot rolling: the ingot casting after will heating is hot-rolled down to 15mm;
Online cooling: hot rolling blank is cooled to 250 ℃;
Hot rolling once more: continue heat and be rolling to 12mm;
Subzero treatment: the annealing furnace of packing into of the sheet material after will rolling carries out subzero treatment, and 160 ℃ of Heating temperatures are incubated 2 hours, inspection after construction: warehousing after passing.
Claims (1)
1, the working method of a kind of deformed Mg and magnesium alloy plate and belt is characterized in that: be widely used in aerospace deformation magnesium alloy plate band, tensile strength 255-282Mpa; Yield strength 187-234MPa;---semicontinuous casting ingot blank---sawing------flaw detection---homogenizing thermal treatment---heating------online cooling---hot rolling once more---low-temperature heat treatment---inspection after construction that is hot-rolled down to certain thickness of milling face that its concrete production technique is: batching and melting; In its operation:
Its heating process: magnesium and the qualified ingot casting of magnesium alloy are heated to 440～510 ℃, are incubated 1-3 hour;
Its hot-rolled process:, be hot-rolled down to 1.149～1.429 of finished product thickness multiple according to the finished product thickness requirement;
Its online cooling process: online cooling is reduced to 180～280 ℃;
It is hot-rolled process once more: be rolled to finished product thickness, adopt and reserve the total pass reduction of remaining finish to gauge 13～30%;
Its low-temperature heat treatment operation; Adopt annealing furnace to anneal, annealing temperature is controlled at carries out low-temperature heat treatment between 150～190 ℃, and insulation 1-3 hour, comes out of the stove then to carry out naturally cooling and get final product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510017985 CN1318633C (en) | 2005-09-09 | 2005-09-09 | Method for processing specific shape-changing magnesium and magnesium alloy plate strip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510017985 CN1318633C (en) | 2005-09-09 | 2005-09-09 | Method for processing specific shape-changing magnesium and magnesium alloy plate strip |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1749428A CN1749428A (en) | 2006-03-22 |
| CN1318633C true CN1318633C (en) | 2007-05-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200510017985 Expired - Fee Related CN1318633C (en) | 2005-09-09 | 2005-09-09 | Method for processing specific shape-changing magnesium and magnesium alloy plate strip |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100400699C (en) * | 2006-07-10 | 2008-07-09 | 东北大学 | Preparation method of 300MPa level, isotropic AZ31 magnesium alloy sheet |
| CN101422784B (en) * | 2007-11-01 | 2012-03-14 | 山西银光华盛镁业股份有限公司 | Rolling technique of ultra-fine grained magnesium alloy sheet |
| CN101474745B (en) * | 2009-01-20 | 2010-06-02 | 清华大学 | Preparation method of AZ31B magnesium alloy stamping sheet |
| CN101623944B (en) * | 2009-08-10 | 2013-08-21 | 北京华盛荣镁业科技有限公司 | Magnesium alloy sandwich plate and preparation method thereof |
| CN101648210B (en) * | 2009-08-28 | 2011-10-26 | 中铝洛阳铜业有限公司 | Processing method for rolling magnesium alloy plate with low temperature, high speed and large processing amount |
| CN102189120A (en) * | 2010-03-12 | 2011-09-21 | 上海西重所重型机械成套有限公司 | Supplementary heating method for low plastic metal plate band |
| CN102240676B (en) * | 2011-05-11 | 2013-07-03 | 北京科技大学 | Rolling device for preparing high-toughness high-formability magnesium alloy sheet strip coil |
| CN107974596A (en) * | 2017-11-29 | 2018-05-01 | 宁波市鄞州隆茂冲压件厂 | A kind of high-performance hinge |
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- 2005-09-09 CN CN 200510017985 patent/CN1318633C/en not_active Expired - Fee Related
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Effective date of registration: 20060317 Address after: No. 1, Xiyuan Road, Jianxi District, Luoyang, Henan Applicant after: Zhonglu Luoyang Copper Industry Co., Ltd. Address before: Luoyang Luoyang Jianshe Road 50 Henan copper processing group company technology center Applicant before: Luoyang Copper Processing Group Co., Ltd. |
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