CN102632175A - Radial forging process of cast-state magnesium alloy tube - Google Patents
Radial forging process of cast-state magnesium alloy tube Download PDFInfo
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- CN102632175A CN102632175A CN2012101208192A CN201210120819A CN102632175A CN 102632175 A CN102632175 A CN 102632175A CN 2012101208192 A CN2012101208192 A CN 2012101208192A CN 201210120819 A CN201210120819 A CN 201210120819A CN 102632175 A CN102632175 A CN 102632175A
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Abstract
The invention relates to a radial forging process of a cast-state magnesium alloy tube, belonging to non-ferrous metal processing. The process comprises the following steps of firstly carrying out homogenizing annealing, forging, finishing and finally carrying out surface machining. By using the process, two problems for limiting the development of seamless magnesium alloy tubes, namely difficult hot piercing and low yield, are fundamentally solved, so that the yield of the magnesium alloy tube is raised from 45-55% currently at home and abroad to above 90%, the production cost of tubes is reduced by above 40% and leapfrog development is realized in the production of the magnesium alloy seamless tubes. The processed product has the advantages of excellent mechanical property, high production efficiency, high material utilization ratio, high precision of forging member and low surface roughness.
Description
Technical field
The present invention relates to non-ferrous metal processing is a kind of radial forging process of as-cast magnesium alloy tubing.
Background technology
Magnesium alloy has favorable conductive, thermal conductivity, and electromagnetic wave shielding is good, and specific strength and specific stiffness are high; Damping property is good; Cut and good dimension stability are prone to reclaim, and help advantages such as environmental protection; In industries such as Aero-Space, the vehicles, telecommunications great application prospect is arranged, be described as " the green engineering material of 21 century ".But because magnesium alloy belongs to close-packed hexagonal structure, temperature-room type plasticity is lower, and forming ability is poor, big limitations the magnesium alloy application.The production for the sheet material of wrought magnesium alloy at present mainly concentrates on hot rolling system, hot extrusion, these several kinds of modes of texturing of continuous casting and rolling; Hot rolling panel and continuous casting and rolling sheet material combination property are relatively poor; The hot extrusion board size is less, anisotropy is bigger, has greatly limited applying of large-size high-tensile degree wrought magnesium alloy.So the patent of forging rolling combined preparation large-size high-tensile degree magnesium alloy plate technology seems particularly important.
Summary of the invention
The object of the invention is to propose a kind of radial forging process that overcomes the as-cast magnesium alloy tubing of prior art defective.
The present invention includes following steps:
1) homogenizing annealing: the extruding attitude magnesium alloy hollow bloom that will adopt machined to remove surface oxide layer heats up with stove or when furnace temperature is lower than 200 ℃, advances stove; Programming rate is controlled at < 10 ℃/>min; Pipe temperature gradient increased temperature between 250～400 ℃ the time; And at each temperature section insulation 2～15h, the pipe temperature is insulation 4～20h between 400～470 ℃ the time, and pipe is come out of the stove the back air cooling to room temperature;
2) forge processing: the round-robin method repeatedly that adopts forge hot, annealing and cold forging; When being 350～420 ℃, heating pipe to surface temperature opens forging, forging temperature when at every turn forging the after annealing temperature promptly as forge hot; Adopt cooling forging, every time annealing temperature to be lower than at the accumulative total deflection greater than 20% o'clock and go up 15～30 ℃ of a time annealing temperatures; The tup temperature is lower 20～100 ℃ than pipe temperature during forge hot; Every time deflection is 2～18%, and the total deformation of forging is 25～70%; Under the condition that room temperature and tup temperature room temperature are, carry out cold forging;
3) finishing: straightening processing;
4) surperficial machining.
Advantage of the present invention:
1, two large problems---hot piercing difficulty and lumber recovery are low fundamentally to solve the seamless magnesium alloy pipe development of restriction; Make the magnesium alloy pipe lumber recovery from domestic and international 45～55% bringing up to more than 90% at present; The preparation of pipes cost reduces more than 40%, will bring great-leap-forward development aspect the magnesium alloy seamless pipe production technology.
2, the mechanical property of product is good, and room temperature radial forging+annealing process is produced magnesium alloy pipe, at deflection greater than 20% o'clock; Total cross-section can obtain than uniform tissue, and the further increase along with the accumulative total deflection cooperates with suitable Technology for Heating Processing; Can obtain more evenly small grains; Average grain size is below 10 μ m, and anisotropy is eliminated basically, and comprehensive mechanical property obviously improves.
3, production efficiency is high, because the striking frequency of radial forging machine is high, the process that forges is control automatically, and is uninterrupted between work step, forges and do not use any other auxiliary tools in the process, needn't carry out work step and measure.
4, stock utilization is high, because radial forging technology shortens the forging precision height, allowance is little, can significantly save material.Cold forging spare can be without cut or only just can directly be used through the too small amount cut.
5, forging precision is high, surface roughness is low, and the extruding attitude magnesium alloy pipe of cold forging external diameter 60mm wall thickness 20 adopts plug forming dimension tolerance to reach ± 0.4mm; Cold forging surface roughness external diameter can reach Ra3.2～0.4 μ m.
The specific embodiment
In conjunction with trade mark AZ31B, the magnesium alloy pipe production with superfine grained structure of product specification ф 120mm * 40mm is that example describes.
Its concrete production method is following:
1, homogenizing annealing: (specification: ф 70mm * 15mm) carry out removing surface confirms not have crackle etc. to extruding attitude magnesium-alloy tube.
Pipe is heated up with stove or when furnace temperature is lower than 200 ℃, advances stove; Programming rate is controlled at < 10 ℃/>min; Pipe temperature gradient increased temperature between 250～400 ℃ the time; And at each temperature section insulation 2～15h, the pipe temperature is insulation 4～20h between 400～470 ℃ the time, and pipe is come out of the stove the back air cooling to room temperature.
2, forge processing:
1) Forge Heating temperature: the as-cast magnesium alloy hollow ingot needs heat penetration when opening and forging, forge hot first the time surface temperature in 350～420 ℃ of scopes; Each forging temperature when forging the after annealing temperature promptly as forge hot can adopt cooling to forge at the accumulative total deflection greater than 20% o'clock, and promptly every time annealing temperature is lower than and goes up 15～30 ℃ of a time annealing temperatures, at room temperature carries out when cold forging and finishing.
2) tup and manipulator temperature: than low 20～100 ℃ of workpiece temperature, room temperature gets final product when cold forging and finishing during forge hot;
3) ram velocity/forging frequency: during forge hot greater than 120 times/minute～1200 times/minute.
4) the revolution N=3～15rPm of forging rotary speed/chuck.
5) axial feed rate/blank feeding speed V: being generally 1～3m/min during forge hot, is 0.2～1m/min during cold forging, is 0.5～1.5m/min during finishing.
6) advance hammer speed/radial feed speed: be generally 50～250 mm/min.
7) drafts radially: every time deflection of swaging is generally 2～18%; Total deformation is 25%～70%; When deflection greater than 20% the time; The tissue of magnesium alloy pipe is changed into to forge by as-cast structure basically to be organized, and when cooling is forged, also can adopt the deflection of the deflection of back a time greater than preceding a time sometimes, and the effect of grain refinement is better;
8) aligning: after each passage forging process is accomplished, as find that bending then aligns, when aligning, the pipe temperature should >=200 ℃.
9) mandrel lubrication and cooling: plug preheating and coating soluble oil, the plug heart portion that has tapering is connected with recirculated cooling water, helps plug and deviates from.
Open and forge 410 ℃ of temperature, smithing technological parameter sees the following form:
Wherein, the 6th passage is finishing, behind 300 ℃ * 0.5h annealing air cooling, carries out.
3, stress relief annealing: 250 ℃ * 2h.
4, Surface Machining: saw the limit at normal temperatures, to surface processing such as polish, form specification and be: ф 70mm * 15mm product.
5, detect: intensity is high, Rm=318Mpa, and R0.2=275Mpa, anisotropy difference is little.The cross section uniform crystal particles is tiny, the about 15 μ m of average grain size.
6, oiling packing: finished product is carried out oiling packing warehouse-in.
Claims (1)
1. the radial forging technology of an as-cast magnesium alloy tubing is characterized in that may further comprise the steps:
1) homogenizing annealing: the extruding attitude magnesium alloy hollow bloom that will adopt machined to remove surface oxide layer heats up with stove or when furnace temperature is lower than 200 ℃, advances stove; Programming rate is controlled at < 10 ℃/>min; Pipe temperature gradient increased temperature between 250～400 ℃ the time; And at each temperature section insulation 2～15h, the pipe temperature is insulation 4～20h between 400～470 ℃ the time, and pipe is come out of the stove the back air cooling to room temperature;
2) forge processing: the round-robin method repeatedly that adopts forge hot, annealing and cold forging; When being 350～420 ℃, heating pipe to surface temperature opens forging, forging temperature when at every turn forging the after annealing temperature promptly as forge hot; Adopt cooling forging, every time annealing temperature to be lower than at the accumulative total deflection greater than 20% o'clock and go up 15～30 ℃ of a time annealing temperatures; The tup temperature is lower 20～100 ℃ than pipe temperature during forge hot; Every time deflection is 2～18%, and the total deformation of forging is 25～70%; Be to carry out cold forging under the condition of room temperature in room temperature and tup temperature;
3) finishing: straightening processing;
4) surperficial machining.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2012101208192A CN102632175A (en) | 2012-04-24 | 2012-04-24 | Radial forging process of cast-state magnesium alloy tube |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012101208192A CN102632175A (en) | 2012-04-24 | 2012-04-24 | Radial forging process of cast-state magnesium alloy tube |
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| CN2012101208192A Pending CN102632175A (en) | 2012-04-24 | 2012-04-24 | Radial forging process of cast-state magnesium alloy tube |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103801647A (en) * | 2013-12-02 | 2014-05-21 | 张铮 | Hot rolling and punching manufacturing method for magnesium alloy tubes |
| 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 |
| WO2015044120A1 (en) * | 2013-09-25 | 2015-04-02 | Vallourec Deutschland Gmbh | Method for the hot forging of a seamless hollow body of material that is difficult to form, in particular of steel |
| CN104826968A (en) * | 2015-05-07 | 2015-08-12 | 攀钢集团研究院有限公司 | GH4169 high-temperature alloy round rod finish forging method |
| CN105327961A (en) * | 2015-10-23 | 2016-02-17 | 成都现代万通锚固技术有限公司 | Machining method of inner thread of connector of spiral anchor rod |
| CN105586553A (en) * | 2016-03-18 | 2016-05-18 | 成都青元泛镁科技有限公司 | Magnesium alloy stepped cooling multi-direction forging process |
| CN105817494A (en) * | 2016-06-01 | 2016-08-03 | 扬州诚德重工有限公司 | Manufacturing technology of large-specification high-strength magnesium alloy pipe |
| CN110883502A (en) * | 2018-09-10 | 2020-03-17 | 湖南金天钛业科技有限公司 | Titanium alloy pipe and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101269387A (en) * | 2008-02-19 | 2008-09-24 | 重庆大学 | Hot extrusion production technique for improving plastisity of magnesium alloy sectional material |
| US20100096046A1 (en) * | 2006-10-30 | 2010-04-22 | Gm Global Technology Operations, Inc. | Method of improving formability of magnesium tubes |
| KR101094460B1 (en) * | 2009-06-01 | 2011-12-15 | 아주대학교산학협력단 | Method for manufacturing Magnesium frame using hydroforming |
-
2012
- 2012-04-24 CN CN2012101208192A patent/CN102632175A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100096046A1 (en) * | 2006-10-30 | 2010-04-22 | Gm Global Technology Operations, Inc. | Method of improving formability of magnesium tubes |
| CN101269387A (en) * | 2008-02-19 | 2008-09-24 | 重庆大学 | Hot extrusion production technique for improving plastisity of magnesium alloy sectional material |
| KR101094460B1 (en) * | 2009-06-01 | 2011-12-15 | 아주대학교산학협력단 | Method for manufacturing Magnesium frame using hydroforming |
Non-Patent Citations (1)
| Title |
|---|
| 徐河: "《镁合金制备与加工技术》", 31 May 2007, 冶金工业出版社, article "镁及镁合金的锻造成形" * |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015044120A1 (en) * | 2013-09-25 | 2015-04-02 | Vallourec Deutschland Gmbh | Method for the hot forging of a seamless hollow body of material that is difficult to form, in particular of steel |
| CN105592954A (en) * | 2013-09-25 | 2016-05-18 | 瓦卢瑞克德国有限公司 | Method for the hot forging of a seamless hollow body of material that is difficult to form, in particular of steel |
| CN105592954B (en) * | 2013-09-25 | 2019-03-22 | 瓦卢瑞克德国有限公司 | The hot forging method for the seamless hollow body for being made, particularly being formed from steel of difficult-to-machine material |
| CN103801647A (en) * | 2013-12-02 | 2014-05-21 | 张铮 | Hot rolling and punching manufacturing method for magnesium alloy tubes |
| 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 |
| CN104826968A (en) * | 2015-05-07 | 2015-08-12 | 攀钢集团研究院有限公司 | GH4169 high-temperature alloy round rod finish forging method |
| CN105327961A (en) * | 2015-10-23 | 2016-02-17 | 成都现代万通锚固技术有限公司 | Machining method of inner thread of connector of spiral anchor rod |
| CN105586553A (en) * | 2016-03-18 | 2016-05-18 | 成都青元泛镁科技有限公司 | Magnesium alloy stepped cooling multi-direction forging process |
| CN105817494A (en) * | 2016-06-01 | 2016-08-03 | 扬州诚德重工有限公司 | Manufacturing technology of large-specification high-strength magnesium alloy pipe |
| CN110883502A (en) * | 2018-09-10 | 2020-03-17 | 湖南金天钛业科技有限公司 | Titanium alloy pipe and preparation method thereof |
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Application publication date: 20120815 |