CN1997472A - Method of warm plastic forming of magnesium and magnesium alloy, and intermediate for use therein - Google Patents
Method of warm plastic forming of magnesium and magnesium alloy, and intermediate for use therein Download PDFInfo
- Publication number
- CN1997472A CN1997472A CNA2004800432724A CN200480043272A CN1997472A CN 1997472 A CN1997472 A CN 1997472A CN A2004800432724 A CNA2004800432724 A CN A2004800432724A CN 200480043272 A CN200480043272 A CN 200480043272A CN 1997472 A CN1997472 A CN 1997472A
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- magnesium
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- workpiece
- carboxylic acid
- layer
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J1/00—Preparing metal stock or similar ancillary operations prior, during or post forging, e.g. heating or cooling
- B21J1/06—Heating or cooling methods or arrangements specially adapted for performing forging or pressing operations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J3/00—Lubricating during forging or pressing
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical Treatment Of Metals (AREA)
- Forging (AREA)
- Lubricants (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
- Laminated Bodies (AREA)
Abstract
A method of warm plastic forming of magnesium and a magnesium alloy, characterized in that it comprises a step (S2) of forming magnesium hydroxide on the surface of a work to be formed comprising of magnesium or a magnesium alloy, a step (S3) of forming a magnesium soap layer in the magnesium hydroxide layer, and a step (S4) of subjecting the resultant work having the magnesium soap layer formed thereon to a warm plastic forming into an article having a prescribed shape.
Description
Technical field
The present invention relates to the warm plastic processing method of magnesium and magnesium alloy (below, these general names slightly are designated as magnesium material) and the intermediate that is used for its processing method.
Background technology
Magnesium material is light weight in the metal of practicality, its thin-walled product are superior in specific strength, electromagnetic wave shielding, thermal diffusivity, vibration attenuation etc., and have the advantages such as regeneration product little energy that are used to reuse, be used for various fields such as electrical equipment, communication equipment, computer equipment, optical device, automotive department product, sports goods in recent years more.
Magnesium material is not suitable for cold plasticity processing, but can be heated to the warm plastic working of carrying out punch process about 200 ℃～400 ℃.Usually,, use mould, form processing with forcing press or bender in the occasion of the rolling stock (shape-changing material) of pull and stretch or crooked magnesium material.At this moment in order to reduce frictional force, the inorganic lubricant of the lubricant of use grease system or silicone-based etc.
In addition, as this prior art, can exemplify and open as the spy that 2003-53437 communique, spy are opened the 2003-55795 communique, the spy opens 2004-51870 communique etc.
But, because to add the temperature in man-hour be more than 200 ℃, adhere on the mould, or viscosity uprises, thereby is difficult for carrying out processing such as pull and stretch so above-mentioned lubricant burns.And, when adding the number platform, need clean mould, so operation is numerous and diverse, production efficiency is low for the lubricant that removes attachment removal or the carbide that burns adhesion to tens of at every turn.Particularly in the occasion of the processing unit (plant) of transmission type successively, every tens of will be unloaded material, cleaning, grind mould, Yi Bian on one side otherwise can not transmit continuously and become the belt-shaped workpieces plate and process.
Have again, if under the state that adheres to lubricant or carbide, proceed processing, then all on the processed goods cut, damage taking place, beating trace, and crackle or crack are taking place in the seamed edge portion of formed products.
And also have, cleaning also is in the situation of difficulty attached to lubricant on the formed products of magnesium material or carbide.
As making substituting with lubricator, the method of inserting teflon plate between workpiece and mould is also arranged, but be not suitable for volume production, and, if will improve the machining accuracy of pull and stretch etc., then because release fold and cut takes place on the surface of formed products or beat trace etc.
Summary of the invention
The objective of the invention is to, a kind of shortcoming of eliminating this prior art is provided, to the adhesion of burning of the lubricant of mould, the number of times that mould is ground in cleaning is not few, the warm plastic processing method of the magnesium material that operating efficiency is good and the intermediate that is used for its processing method.
In order to achieve the above object, first party pattern characteristics of the present invention is, comprising: the operation that forms the magnesium hydroxide layer on the surface of the workpiece that will process that is made of magnesium or magnesium alloy; On this magnesium hydroxide layer, form the operation of magnesium soap layer; And the workpiece temperature plastic working that will form this magnesium soap layer is the operation of regulation shape.
Alternative plan of the present invention is characterized in that according to above-mentioned first scheme: the formation operation of above-mentioned magnesium hydroxide layer is above-mentioned workpiece is contacted with the alkaline solution that contains nitrite ion and to form the operation of magnesium hydroxide layer on surface of the work; The formation operation of above-mentioned magnesium soap layer is to contact the operation that has formed the workpiece of above-mentioned magnesium hydroxide layer and the magnesium hydroxide layer of surface of the work has been restructured as the magnesium soap layer in the alkaline solution that contains aliphatic carboxylic acid ion or aromatic carboxylic acid ion.
Third party's case of the present invention is according to above-mentioned first or alternative plan, it is characterized in that, above-mentioned aliphatic carboxylic acid is that never to have substituting group or have substituent carbon number be the organic compound of selecting in 6～24 the aliphatic carboxylic acid, and above-mentioned aromatic carboxylic acid is that never to have substituting group or have substituent carbon number be the organic compound of selecting in 7～20 the aromatic carboxylic acid.
Cubic case of the present invention is characterized in that according to above-mentioned third party's case above-mentioned organic compound is a stearic acid.
The 5th scheme of the present invention is characterized in that having the anodized operation after above-mentioned temperature plastic working operation according to above-mentioned first scheme.
The 6th scheme of the present invention is characterised in that, forms the magnesium soap layer on the surface of the workpiece that will process that is made of magnesium or magnesium alloy.
The 7th scheme of the present invention is according to above-mentioned the 6th scheme, it is characterized in that, the organic compound that forms above-mentioned magnesium soap layer is that never to have substituting group or have substituent carbon number be 6～24 aliphatic carboxylic acid, and perhaps not having substituting group or having substituent carbon number is the organic compound of selecting in 7～20 the aromatic carboxylic acid.
All directions of the present invention case is characterized in that according to above-mentioned the 7th scheme above-mentioned organic compound is a stearate.
The present invention becomes aforesaid formation, and the adhesion of burning to the lubricant of mould can be provided not, and the number of times that mould is ground in cleaning is few, the warm plastic processing method of the magnesium material that operating efficiency is good and the intermediate that is used for its processing method.
Description of drawings
Fig. 1 is the flow chart of warm plastic processing method that is used to illustrate the magnesium material of first embodiment of the present invention.
Fig. 2 is the amplification view that forms the workpiece of magnesium hydroxide layer from the teeth outwards.
Fig. 3 is the amplification view that forms the workpiece of magnesium soap layer from the teeth outwards.
Fig. 4 is the summary pie graph that is used for the continuous press-working apparatus of embodiments of the present invention.
Fig. 5 is the flow chart of warm plastic processing method that is used to illustrate the magnesium material of second embodiment of the present invention.
The specific embodiment
Embodiments of the present invention below are described.As the magnesium alloy that is suitable in the present invention, it is that alloy, Mg-Zn-Zr are that alloy, Mg-Al are that alloy, Mg-rare earth element are alloy etc. that Mg-Al-Zn is for example arranged.
As above-mentioned Mg-Al-Zn is alloy, and AZ31A, AZ31B, AZ31C, AZ61A, AZ80A etc. are arranged particularly.As above-mentioned Mg-Zn-Zr is alloy, and ZK51A, ZK61A, ZK60, M6, M5, M4 etc. are arranged particularly.As above-mentioned Mg-Al is alloy, and AM100A etc. is arranged particularly.As above-mentioned Mg-rare earth element is alloy, and EZ33A, ZE41A, QE22A etc. are arranged particularly.
As the shape of magnesium material, tabular, tubulose, bar-shaped, graininess etc. are for example arranged.In addition, in plastic working, various processing methods such as pull and stretch, bending, compression, stretching, shearing are for example arranged to magnesium material.
As being used for lubricant of the present invention, can use that for example never to have substituting group or have substituent carbon number be 6～24 aliphatic carboxylate, and not have substituting group or have substituent carbon number be at least a organic compound of selecting among 7～20 aromatic carboxylic acid salt's the group.
In above-mentioned aliphatic carboxylate, aliphatic chain can be that straight chain also can be a side chain.And can be saturated also can be unsaturated.Carbon number in the molecule is preferably 10～24, is preferably 8～22.
Aliphatic carboxylic acid as the aliphatic carboxylate, caproic acid, 4-methylvaleric acid, 2 Ethylbutanoic acid, 2 are for example arranged, 2-acid dimethyl, enanthic acid, sad, n-nonanoic acid, capric acid, hendecanoic acid, laurate, tetradecanoic acid (myristic acid), hexadecanoic acid (palmitic acid), Heptadecanoic acide, stearic acid, arachic acid, docosanoic acid, isostearic acid etc.
As aliphatic carboxylate's salt, alkali metal salt, alkali earth metal salt, amine salt, ammonium salt etc. are for example arranged in addition, be particularly suitable for using alkali metal salt, alkali earth metal salt.
Substituting group as the aliphatic carboxylate is arranged again, hydroxyl, carboxyl, amino, alkoxyl, acetyl group, halogen atom etc. are for example arranged.Replacing number is below 5, is preferably below 3, is preferably 0 or 1.
Preferred concrete organic compound as the aliphatic carboxylate, enuatrol, sodium laurate, tetradecanoic acid sodium, hexadecanoic acid sodium, odium stearate, docosanoic acid sodium, 1 are for example arranged, 2-hydroxyl octadecanoid acid sodium, isostearic acid sodium, 2-dodecylic acid sodium etc.
Carbon number among the above-mentioned aromatic carboxylic acid salt is preferably 7～20, is preferably 7～14.
As aromatic carboxylic acid salt's aromatic carboxylic acid, benzoic acid, phthalic acid, M-phthalic acid, terephthalic acid (TPA), biphenyl dicarboxylic acid, benzene tricarbonic acid, benzene tertacarbonic acid, naphthoic acid etc. are for example arranged.
As aromatic carboxylic acid salt's salt, alkali metal salt, alkali earth metal salt, amine salt, ammonium salt etc. are for example arranged, be particularly suitable for using alkali metal salt, alkali earth metal salt.
As aromatic carboxylic acid salt's substituting group, it is alkyl of 1～6 etc. that hydroxyl, carboxyl, amino, alkoxyl, acetyl group, halogen atom, carbon number are for example arranged.Replacing number is below 5, is preferably below 3, is preferably 0 or 1.
As aromatic carboxylic acid salt's preferred concrete organic compound, Sodium Benzoate, Potassium Benzoate, M-phthalic acid sodium, para-phthalic sodium, biphenyl dicarboxylic acid sodium etc. are for example arranged.
For example can adding in lubricant of the present invention as required, corrosion inhibiter, viscosity modifier, antioxidant, defoamer, pH adjust agent etc.
Fig. 1 is the flow chart of warm plastic processing method that is used to illustrate the magnesium material of first embodiment.
As step that phase diagram is shown in (below, slightly be designated as S) in 1, on the surface of the magnesium material that will process (below, be called workpiece), in order to remove the carbide that in rolling process etc., adheres to, grease part, other dirts etc., use organic solvent cleaning workpieces such as diluent or trichloro-ethylene.
Then in S2, on the full surface of workpiece, form the magnesium hydroxide layer.The formation of this magnesium hydroxide layer is added NaOH and is stirred by an amount of in sodium nitrite in aqueous solution, with the temperature maintenance of its treatment fluid scope at 120 ℃～140 ℃.The concentration of above-mentioned sodium nitrite solution is 50g/L～100g/L, and the addition of NaOH is 395g/L～405g/L.Workpiece was flooded in the treatment fluid of this heating 0.5 minute～5 minutes.And, according to the dirt degree decision dip time of workpiece, so dip time has amplitude as mentioned above.
Behind the dipping, workpiece taken out from treatment fluid wash, carry out above-mentioned pre-treatment and become milky until the surface of workpiece, gloss disappears, thereby forms fine and close magnesium hydroxide layer on the full surface of workpiece.By above-mentioned dipping in sodium nitrite in aqueous solution, lubricant of carbonization etc. in the time of can removing do not remove fully in the organic solvent in above-mentioned S1 rolling really, the surface of cleaning workpiece forms the magnesium hydroxide layer in its surface more neatly.Fig. 2 is the amplification view that forms the workpiece (aluminum) 2 of magnesium hydroxide layer 1 on full surface.
Then in S3, carry out the formation of magnesium soap layer.Before forming this magnesium soap layer, in water, add and melt a kind of odium stearate and potassium hydroxide as above-mentioned aliphatic carboxylate, heating is maintained this lubricant solution 80 ℃～100 ℃ temperature range.The concentration of above-mentioned sodium stearate solution is 3g/L～7g/L, and the addition of potassium hydroxide is 8g/L～12g/L.
If dipping has finished the workpiece of above-mentioned pre-treatment in this lubricant solution, then the magnesium hydroxide layer on surface causes chemical reaction in this lubricant solution, forms the magnesium soap layer that is made of magnesium carboxylates.The dip time of workpiece is 1 minute～5 minutes.Fig. 3 reforms above-mentioned magnesium hydroxide layer 1 and the amplification view that forms the workpiece (aluminum) 2 of magnesium soap layer 3 on full surface.
The workpiece (intermediate) that forms the magnesium soap layer like this on the surface is fixed on the fixed punch process (S4) of the enterprising professional etiquette of continuous press-working apparatus described later, after this punch process, formed products is carried out anodized (S5).
This anodized comprises 3 operations of pre-treatment, oxidation processes and post processing.Pre-treatment is the processing of removing attached to the lip-deep lubricant of processed goods etc., specifically is that alkali cleans or acid is cleaned.Magnesium is alkali-proof, so can use the high cleaning agent of basicity to clean effectively with high temperature.In the occasion that acid is cleaned, the short time uses the low cleaning agent of acidity of the matrix that does not damage processed goods to get final product.
The processed goods that will carry out pre-treatment for example is immersed in that mixed aqueous solution by NaOH, ethylene glycol, sodium oxalate constitutes is maintained in 75 ℃～80 ℃ the electrolytic cell energising of stipulating.Then the dipping stipulated time finishes oxidation processes in the mixed aqueous solution of sodium dichromate, sodium hydrogen fluoride.Afterwards, washing, the heat of carrying out processed goods wash, dry post processing.
On the surface of processed goods, form fine and close oxide-film by this anodized.This oxide-film works as the inhibition protection film of interior metal, and becomes the counterdie of application.Therefore after this anodized, can carry out the last application of S6.
Fig. 4 is the summary pie graph of the continuous press-working apparatus that uses in the present embodiment.
This continuous press-working apparatus fixing downside machine table 5 on base station 4, at the carrying direction X of these downside machine table 5 upper edge workpiece, fixed side mold 6a～6e that a plurality of section configurations that deepen gradually are installed is matrix.
Erectting more in the outer part of above-mentioned base station 44 bars 7 are set, can support upside machine table 9 up or down by support component 8 than downside machine table 5.Side below upside machine table 9 is installed movable side mold 10a～10e that the elongated gradually section configuration of a plurality of outstanding sizes is a convex opposed to each other with said fixing side mold 6a～6e.This upside machine table 9 (movable side mold 10a～10e) utilize the hydraulic cylinder 12 that is installed on the top board 11 intermittently to move up and down.
Difference internal heater (not shown) on said fixing side mold 6a～6e and movable side mold 10a～10e, mold temperature is controlled as 200 ℃～350 ℃ that are fit to warm plastic working.
Form the workpiece 2 that for example is made of above-mentioned AZ31 (Mg-Al-Zn is an alloy) of magnesium soap layer 3 on comprehensively by above-mentioned processing, band shape is rolled into the cylinder shape continuously, is intermittently sent to the arrow directions X by connecting gear 13, along carrying on the downside machine table 5.
Then, by above-mentioned relatively downside machine table 5 (the upside machine table 9 of fixed side mold 6a～6e) (and movable side mold 10a～10e) intermittent move up and down action and workpiece 2 transmit the acting in conjunction of moving successively, workpiece 2 by warm plastic working gradually by pull and stretch, cut off as single product, finally take out from chute 14 as formed products 15.
What temperature plastic processing method of the present invention did not have a lubricant burns adhesion etc., so be specially adapted to the continuous press-working apparatus of this transmission type successively, can bring into play effect of the present invention really.
Fig. 5 is the flow chart of warm plastic processing method that is used to illustrate the workpiece of second embodiment of the present invention.
In S1, clean the workpiece that to process, in S2, on the full surface of workpiece, form the magnesium hydroxide layer.The formation condition of this magnesium hydroxide layer is identical with above-mentioned first embodiment.
Then in S3, the lubricant solution that dissolves odium stearate and potassium hydroxide is coated on the heated mold, in S4, carries out punch process with this mould.At this moment in mould, the heat that is reached from mould by stamping pressure makes the magnesium hydroxide layer reaction of lubricant solution and surface of the work and forms the magnesium soap layer.This magnesium soap layer forms in the process of regulation shape workpiece to work as lubricant carrying out punch process.
After this punch process, processed goods is carried out anodized and form fine and close oxide-film (S5) from the teeth outwards, carry out last application (S6) afterwards.
When forming magnesium hydroxide layer and magnesium soap layer in the above-described embodiment, workpiece has been impregnated in the solution, but also can be suitable for the method for solution being brushed or applying with spin coated on workpiece.
The warm plastic processing method of magnesium material of the present invention is applicable to for example various products such as automotive department product, various situations such as optical devices such as communication equipment, digital camera, wheel or steering column such as computer equipment such as PA-systems such as the loudspeaker conical surface or television frame, personal computer frame, portable telephone set frame.
Claims (8)
1. the warm plastic processing method of magnesium and magnesium alloy is characterized in that, comprising:
On the surface of the workpiece that will process that constitutes by magnesium or magnesium alloy, form the operation of magnesium hydroxide layer;
On this magnesium hydroxide layer, form the operation of magnesium soap layer; And
With the workpiece temperature plastic working that has formed this magnesium soap layer is the operation of regulation shape.
2. the warm plastic processing method of magnesium according to claim 1 and magnesium alloy is characterized in that,
The formation operation of above-mentioned magnesium hydroxide layer is above-mentioned workpiece is contacted with the alkaline solution that contains nitrite ion and to form the operation of magnesium hydroxide layer on surface of the work,
The formation operation of above-mentioned magnesium soap layer is to contact the operation that has formed the workpiece of above-mentioned magnesium hydroxide layer and the magnesium hydroxide layer of surface of the work has been restructured as the magnesium soap layer in the alkaline solution that contains aliphatic carboxylic acid ion or aromatic carboxylic acid ion.
3. the warm plastic processing method of magnesium according to claim 1 and 2 and magnesium alloy is characterized in that,
Above-mentioned aliphatic carboxylic acid is that never to have substituting group or have substituent carbon number be the organic compound of selecting in 6～24 the aliphatic carboxylic acid, and above-mentioned aromatic carboxylic acid is that never to have substituting group or have substituent carbon number be the organic compound of selecting in 7～20 the aromatic carboxylic acid.
4. the warm plastic processing method of magnesium according to claim 3 and magnesium alloy is characterized in that,
Above-mentioned organic compound is a stearic acid.
5. the warm plastic processing method of magnesium according to claim 1 and magnesium alloy is characterized in that,
After above-mentioned temperature plastic working operation, has the anodized operation.
6. the warm plastic working intermediate of magnesium and magnesium alloy is characterized in that,
On the surface of the workpiece that will process that constitutes by magnesium or magnesium alloy, form the magnesium soap layer.
7. the warm plastic working intermediate of magnesium according to claim 6 and magnesium alloy is characterized in that,
The organic compound that forms above-mentioned magnesium soap layer is that never to have substituting group or have substituent carbon number be 6～24 aliphatic carboxylic acid, and perhaps not having substituting group or having substituent carbon number is the organic compound of selecting in 7～20 the aromatic carboxylic acid.
8. the warm plastic working intermediate of magnesium according to claim 7 and magnesium alloy is characterized in that,
Above-mentioned organic compound is a stearate.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2004/011659 WO2006013643A1 (en) | 2004-08-06 | 2004-08-06 | Method of warm plastic forming of magnesium and magnesium alloy, and intermediate for use therein |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1997472A true CN1997472A (en) | 2007-07-11 |
| CN1997472B CN1997472B (en) | 2010-05-26 |
Family
ID=35786944
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2004800432724A Expired - Fee Related CN1997472B (en) | 2004-08-06 | 2004-08-06 | Method of warm plastic forming of magnesium and magnesium alloy |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP4510819B2 (en) |
| CN (1) | CN1997472B (en) |
| TW (1) | TWI281954B (en) |
| WO (1) | WO2006013643A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106133201A (en) * | 2014-02-21 | 2016-11-16 | 日本帕卡濑精株式会社 | DC cathode electrolysis constituent, with the metal material of lubricating film and manufacture method thereof |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5328043B2 (en) * | 1973-10-31 | 1978-08-11 | ||
| JPS5326235B2 (en) * | 1974-01-25 | 1978-08-01 | ||
| JPH03269092A (en) * | 1990-03-16 | 1991-11-29 | Daido Steel Co Ltd | Lubricant for cold and hot plastic processing |
| US5819572A (en) * | 1997-07-22 | 1998-10-13 | General Motors Corporation | Lubrication system for hot forming |
| JP2000144167A (en) * | 1998-11-05 | 2000-05-26 | Asahi Denka Kogyo Kk | Aqueous lubricating composition |
| JP3786404B2 (en) * | 2000-07-27 | 2006-06-14 | 日立金属株式会社 | Molding method of light alloy material |
-
2004
- 2004-08-06 CN CN2004800432724A patent/CN1997472B/en not_active Expired - Fee Related
- 2004-08-06 WO PCT/JP2004/011659 patent/WO2006013643A1/en active Application Filing
- 2004-08-06 JP JP2006519264A patent/JP4510819B2/en not_active Expired - Fee Related
-
2005
- 2005-07-08 TW TW094123099A patent/TWI281954B/en not_active IP Right Cessation
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106133201A (en) * | 2014-02-21 | 2016-11-16 | 日本帕卡濑精株式会社 | DC cathode electrolysis constituent, with the metal material of lubricating film and manufacture method thereof |
| CN106133201B (en) * | 2014-02-21 | 2018-12-07 | 日本帕卡濑精株式会社 | DC cathode electrolysis constituent, metal material and its manufacturing method with lubricating film |
Also Published As
| Publication number | Publication date |
|---|---|
| TWI281954B (en) | 2007-06-01 |
| JPWO2006013643A1 (en) | 2008-05-01 |
| JP4510819B2 (en) | 2010-07-28 |
| CN1997472B (en) | 2010-05-26 |
| WO2006013643A1 (en) | 2006-02-09 |
| TW200610839A (en) | 2006-04-01 |
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