CN105695904A - Super-refining method for low-melting-point metal ring-direction grinding surface and device realizing super-refining method - Google Patents
Super-refining method for low-melting-point metal ring-direction grinding surface and device realizing super-refining method Download PDFInfo
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- CN105695904A CN105695904A CN201610072728.4A CN201610072728A CN105695904A CN 105695904 A CN105695904 A CN 105695904A CN 201610072728 A CN201610072728 A CN 201610072728A CN 105695904 A CN105695904 A CN 105695904A
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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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- 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
- C21D9/0068—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for particular articles not mentioned below
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Abstract
The invention discloses a super-refining method for a low-melting-point metal ring-direction grinding surface and a device realizing the super-refining method. The method comprises the following steps: processing a low-melting-point metal to-be-treated test piece into a cylindrical shape, so that the cylindrical low-melting-point metal to-be-treated test piece carries out auto rotation; and carrying out advance type surface grinding on the low-melting-point metal to-be-treated test piece in a generatrix direction of the cylindrical low-melting-point metal to-be-treated test piece which carries out auto rotation. The device comprises a test piece clamping auto rotation component, a pressure-control grinding component, a cooling component and a vertical feeding component. According to the super-refining method for the low-melting-point metal ring-direction grinding surface and the device realizing the super-refining method, refining of a metal surface still can be realized without processing the metal surface for many times, and the purpose of refining the low-melting-point metal surface is achieved through dynamic re-crystallization behaviors of the metal.
Description
Technical field
The invention belongs to low-melting-point metal plastic working field, specifically a kind of low-melting-point metal hoop rolles over rub surface super-refinement method and device thereof。
Background technology
Under the low-melting-point metals such as magnalium environment under arms, the unstability (such as tired, abrasion and corrosion etc.) of material starts from surface more, therefore only a degree of crystal grain thinning is prepared at material surface, i.e. surface super-refinement technology, it is possible to improved overall performance and the military service behavior of material by organization optimization。The method being now widely used for preparing metal material surface grained material has the methods such as surface mechanical attrition treatment method, cam rollers platen press, pneumatic shot-peening method and supersonic particles bombarding method。
Although above-mentioned several method is attained by the purpose of metal surface grain refinement, but these methods or owing to technology of preparing is complicated, cost is high or owing to prepared material requirements is comparatively strict and be restricted, and the above-mentioned method majority preparing grained material is by carrying out imposed load repeatedly at material surface, accumulate sufficiently large accumulating plastic deformation's amount, coarse-grain is made progressively to be evolved into thin crystalline substance by dislocation, owing to the course of processing is excessively loaded down with trivial details so that industry practical application is restricted。
Summary of the invention
For defect of the prior art and deficiency, it is an object of the invention to provide a kind of low-melting-point metal hoop and roll over rub surface super-refinement method and device thereof, the method can not only quickly realize the surface refinement of low-melting-point metal, operation simpler economy when making the surface that methods and apparatus of the present invention carries out low-melting-point metal refine by the dynamic recrystallization principle of metal。
To achieve these goals, the technical solution used in the present invention is as follows:
A kind of low-melting-point metal hoop rolles over surface super-refinement method of rubbing, pending for low-melting-point metal test specimen is processed into cylindrical shape, the pending test specimen of low-melting-point metal making cylindrical shape carries out rotation along the surfaces of revolution, and the pending test specimen of low-melting-point metal is carried out travelling surface milling by the generatrix direction of the pending test specimen of low-melting-point metal along the cylindrical shape of rotation。
Concrete, the spin velocity of the pending test specimen of low-melting-point metal of described cylindrical shape is 2～10 with the gait of march ratio of travelling surface milling；The unit of spin velocity is r/min, and gait of march unit is mm/min。
More specifically, drafts when the pending test specimen of low-melting-point metal being carried out travelling surface milling is 0.2～1.2mm。
Further, described low-melting-point metal is AZ31 magnesium alloy, and drafts when the pending test specimen of AZ31 magnesium alloy is carried out travelling surface milling is 0.2～1mm。
It addition, the area ratio carrying out the lateral area of the unit milling area of travelling surface milling and the pending test specimen of low-melting-point metal of cylindrical shape is 1:4～24。
Realize described low-melting-point metal hoop and roll over the device of surface super-refinement method of rubbing, rotation component, pressure control milling component, cooling component and vertical feeding component is clamped including test specimen, test specimen clamping rotation component is for the pending test specimen of low-melting-point metal of clamp cylinders body shape and controls it and carries out rotation along the surfaces of revolution, pressure control milling component generatrix direction of the pending test specimen of low-melting-point metal along cylindrical shape under the drive of vertical feeding component carries out travelling milling, and the pending test specimen of low-melting-point metal of the cylindrical shape in the course of processing is cooled down by cooling component。
Concrete, described pressure control milling component includes milling head and the pressure device coaxially connected with milling head, and pressure device is controlled by control pressurer system；Fix vertical with the mobile terminal of vertical feeding component of pressure device is connected。
More specifically, the milling face of described milling head is arcwall face, and the radian of arcwall face is
Further, described test specimen clamping rotation component includes three ratchets and rotation motor, the pending test specimen of low-melting-point metal of three ratchet clamp cylinders body shapes, rotation motor drive three ratchets test specimen pending with the low-melting-point metal of cylindrical shape together with carry out rotation along the surfaces of revolution。
Further, described test specimen clamping rotation component also includes thimble, thimble is positioned at the top of three ratchets, and three ratchets are by a bottom end clamping of pending for the low-melting-point metal of cylindrical shape test specimen, and thimble holds out against in another bottom surface of the pending test specimen of low-melting-point metal of cylindrical shape。
Advantages of the present invention:
1, the present invention proposes a kind of low-melting-point metal hoop and rolles over surface super-refinement method of rubbing, the method realizes the refinement to metal surface mainly through the pending test specimen of low-melting-point metal of the cylindrical shape of rotation with the mode of the two-way relative motion carrying out travelling surface milling along bus side, or even super-refinement, low melting point metal material surface is when being under pressure the frictional force combined effect tangential with surface, friction tangential force makes metal surface die break, and the shearing stress being subject to due to material is face shearing stress, material tangentially plastic deformation is improved, reach the purpose on refinement surface；Material generation severe plastic deformation simultaneously, bigger frictional heat makes metal occurrence dynamics recrystallization, reaches the purpose of further grain refinement；Not only reduce processing number of times, and add degree of refinement, achieved the goal by the dynamic recrystallization behavior of metal；
2, comparing traditional metal surface refinement mode, the processing mode of the present invention is simpler, and cost is low, is beneficial to industrial applications；
3, the present invention gives to be specifically designed to and realizes low-melting-point metal hoop and roll over the device of surface super-refinement method of rubbing, this device is mainly through clamping rotation component, pressure control milling component, cooling component and vertical feeding component realize the rotation of test specimen and the combination of the bidirectional-movement of travelling milling, test specimen clamping rotation component is for the pending test specimen of low-melting-point metal of clamp cylinders body shape and controls it and carries out rotation along the surfaces of revolution, pressure control milling component generatrix direction of the pending test specimen of low-melting-point metal along cylindrical shape under the drive of vertical feeding component carries out travelling milling, the pending test specimen of low-melting-point metal of the cylindrical shape in the course of processing is cooled down by cooling component；
4, additionally, the coordinating of milling head and test specimen that low-melting-point metal hoop rolles in the device of surface super-refinement method of rubbing that realize of the present invention is face cooperation, roll over the surface that the head that rubs is pressed into the pending test specimen of a high speed rotating under the effect of the pressure, material surface is in the tangential frictional force combined effect with surface that is under pressure, friction tangential force makes metal surface die break, the shearing stress being subject to due to material is face shearing stress, material tangentially plastic deformation is improved, and material reaches the purpose of refinement。
Accompanying drawing explanation
The low-melting-point metal hoop that Fig. 1 is the present invention rolles over the structural representation of surface super-refinement device of rubbing；
Fig. 2 is the head structural relation schematic diagram with test specimen of milling of Fig. 1；
Fig. 3 is the decorative pattern that hoop rolles over the head surface that rubs, and A, B and the C in figure represents decorative pattern three kinds different respectively；
Fig. 4 is that the rolling of the present invention rubs head at radian Ψ schematic diagram corresponding to cylindrical work piece surface, and in figure, D represents the diameter of cylindrical shape test specimen, and the circle in figure represents the transverse cross-sectional view of cylindrical shape test specimen；
Fig. 5 is the metallographic structure figure in embodiment one before test specimen processing；
Fig. 6 is the metallographic structure figure in embodiment one after test specimen processing；
Fig. 7 is the metallographic structure figure in embodiment two after test specimen processing；
Fig. 8 is the surface transmission microphotograph in embodiment three before test specimen processing；
Fig. 9 is the surface transmission microphotograph in embodiment three after test specimen processing；
In Fig. 1 and 2, each label is expressed as: 1-milling head, 2-fix sleeve, 3-pressure device, 4-control pressurer system, 5-the first protective cover, 6-vertical feeding motor, 7-rotation motor, 8-tri-ratchet, 9-workbench, the pending test specimen of 10-low-melting-point metal, 11-the second protective cover, 12-thimble, 13-cooling component；
Below in conjunction with specification drawings and specific embodiments, the present invention is illustrated。
Detailed description of the invention
A kind of low-melting-point metal hoop of the present invention rolles over surface super-refinement method of rubbing, it is processed into cylindrical shape including by pending for low-melting-point metal test specimen, the pending test specimen of low-melting-point metal making cylindrical shape carries out rotation along the surfaces of revolution, and the pending test specimen of low-melting-point metal is carried out travelling surface milling by the generatrix direction of the pending test specimen of low-melting-point metal along the cylindrical shape of rotation；Low melting point metal material surface is when being under pressure the frictional force combined effect tangential with surface, friction tangential force makes metal surface die break, and the shearing stress being subject to due to material is face shearing stress so that material tangentially plastic deformation improves, and reaches the purpose on refinement surface；Material generation severe plastic deformation simultaneously, bigger frictional heat makes metal occurrence dynamics recrystallization, reaches the purpose of further grain refinement。
In the course of processing, the angular velocity of rotation of the pending test specimen of low-melting-point metal and the gait of march of travelling surface milling should keep within the specific limits, because angular velocity of rotation is excessive, can strengthen frictional heat, and heat input is crossed conference and made metal grain alligatoring；When the gait of march of travelling surface milling is excessive, owing to translational speed is too fast simultaneously, heat input reduces so that work piece surface produces defect, and mouldability is bad。According to inventor's research experience, when the spin velocity of the pending test specimen of low-melting-point metal of cylindrical shape is 2～10 with the gait of march ratio of travelling surface milling, it is possible to be effectively ensured in the course of processing metal surface mouldability and metal fining degree；The unit of spin velocity is rad/s, and gait of march unit is mm/min。
Carry out travelling surface to roll over the unit rubbed to roll over the area ratio of rub area and the lateral area of the pending test specimen of low-melting-point metal of cylindrical shape be 1:4～24。
In conjunction with Fig. 1 and 2, the low-melting-point metal hoop that realizes of the present invention is rolled over the device of surface super-refinement method of rubbing and is included test specimen clamping rotation component, pressure control milling component, cooling component 13 and vertical feeding component, test specimen clamping rotation component is for the pending test specimen 10 of low-melting-point metal of clamp cylinders body shape and controls it and carries out rotation along the surfaces of revolution, pressure control milling component carries out travelling milling along the generatrix direction of the pending test specimen 10 of the low-melting-point metal of cylindrical shape under the drive of vertical feeding component, the pending test specimen 10 of low-melting-point metal of the cylindrical shape in the course of processing is cooled down by cooling component 13。
Wherein, pressure control milling component includes milling head 1 and fixing sleeve 2 coaxially connected with milling head 1 successively, pressure device 3 and control pressurer system 4, and milling head 1 is arranged on pressure device 3 by fixing sleeve 2, and pressure device 3 is controlled by control pressurer system 4；Fix vertical with the mobile terminal of vertical feeding component of pressure device 3 is connected。Vertical feeding component includes vertical feeding motor 6, when carrying out the milling of test specimen, control pressure device 3 by pressure system 4 and give the drafts of milling head 1, control, again through vertical feeding motor 6, the speed that milling head 1 is advanced along generatrix direction back and forth in pending surface of test piece；First protective cover 5 of sealing is set outside vertical feeding component, protects the operating process of vertical feeding component；The cooperation rolling over rub 1 and pending test specimen is that face coordinates, roll over the surface of the 1 pending test specimen being pressed into a high speed rotating under the effect of the pressure that rubs, material surface is in the tangential frictional force combined effect with surface that is under pressure, friction tangential force makes metal surface die break, the shearing stress being subject to due to material is face shearing stress, material tangentially plastic deformation is improved, and material reaches the purpose of refinement；Material generation severe plastic deformation simultaneously, bigger frictional heat makes metal occurrence dynamics recrystallization, reaches the purpose of grain refinement。Force cooling effect that metallic surface degree of grain refinement is improved simultaneously。
The cooling component 13 of the present invention adopts cooling-lubricant, is sprayed at the surface of test piece in processing procedure by the pipeline connected, partly in order to metal is lowered the temperature after machining, it is suppressed that growing up of metal recrystal grain；Still further aspect is can to regulate pending test specimen and rolling rubs the frictional force between 1, can cool down rolling simultaneously and rub 1, improve its service life。
Preferably, in conjunction with Fig. 4, the milling face of milling head 1 is arcwall face, and the radian of arcwall face isIn conjunction with Fig. 3, arranging the multiple different embossing increasing skin-friction force on the milling face of the milling head 1 of the present invention, different embossing are that the heat of generation is more so that the frictional force in the course of processing increases for the effect of pending test specimen, it is more beneficial for molding so that the flow range of metal is bigger。
Test specimen clamping rotation component includes three ratchets 8 and rotation motor 7, the pending test specimen 10 of low-melting-point metal of three ratchet 8 clamp cylinders body shapes, rotation motor 7 carries out rotation along the surfaces of revolution together with driving three ratchets 8 test specimen 10 pending with the low-melting-point metal of cylindrical shape, adopt that three ratchets 8 fasten in order that ensure in the process rotated, pending test specimen will not produce displacement because of the effect of revolving force, meanwhile, the requirement that numerous workpiece size can be met of three ratchets 8。Test specimen clamping rotation component also includes thimble 12, workbench 9 and the second protective cover 11, thimble 12 is positioned at the top of three ratchets 8, three ratchets 8 are by a bottom end clamping of pending for the low-melting-point metal of cylindrical shape test specimen 10, thimble 12 holds out against in another bottom surface of the pending test specimen 10 of low-melting-point metal of cylindrical shape, three ratchets 8 are embedded on workbench 9, the second protective cover 11 that the arranged outside of test specimen clamping rotation component seals, the processing procedure of protection test specimen, adopt thimble 12 in order that ensure that the stability making pending test specimen in rotation process is better, pending surface of test piece is processed more uniform, the movement locus of thimble 12 is to rotate along its fixing end, and vertical direction feeding can be carried out。
In order to study in the test specimen course of processing relation between each factor, inventor gives following computing formula and carries out theoretical direction:
The diameter of the pending test specimen of low-melting-point metal of the cylindrical shape selected by assuming is D, unit is mm, the angular velocity of rotation of pending test specimen is ω, unit is r/min, the gait of march of travelling surface milling is v, unit is: mm/min, radian corresponding to milling head is Ψ, the height of milling head is h, unit is mm, the height of pending test specimen is H, unit is mm, taking variable is γ h (0 < γ < 1), assume when completing the distance of distance h-γ h, pending test specimen rotates N circle, N is natural number, then process the time t required for sample, unit is min, for:
Then have:
Then have:
Take variable to refer to and process after a time every time, the part of upper a time will be repeated processing, so that be absent from gap between processing up and down；Also for every time hoop process after metallic surface be absent from processing after connect stubble, it is also possible to the degree of refinement of metal is improved, improves globality and the uniformity of metal fining so that surface property is more uniform simultaneously。
Wherein, when regulating the pressure being perpendicular to work piece surface, it should consider to roll over the head frictional force to workpiece of rubbing。Assume that frictional force is τn, have according to coulomb dry friction law:
τn=f σn
Wherein, f is friction factor, σnFor pressure device give with surface compression direct stress, unit is newton, and in general, the temperature of deformable material is more high, then coefficient of friction is more big。But copper is when 800 DEG C and steel are more than 900 DEG C, and its coefficient of friction reduces with the rising of temperature on the contrary, thus is considered as the factor of part material when regulating friction force。
The part rolling over the deep work piece surface of the head that rubs is referred to as drafts, when choosing drafts, can determine according to processing metallic surface mouldability, when drafts is bigger, fricative heat input strengthens, the mouldability of metal is improved, drafts when the pending test specimen of low-melting-point metal is carried out travelling surface milling is 0.2～1.2mm, drafts is more big, the mouldability of finished surface is more good, but the frictional heat produced is many, crystallite dimension can thickerization, it is 0.2～1mm that the present invention provides the drafts of the relatively low metal of fusing point such as AZ31 magnesium alloy。
Embodiment one:
In conjunction with illustrated method and apparatus, AZ31 magnesium alloy carrying out hoop and rolles over mocha work, the fusing point of AZ31 magnesium alloy is 650 DEG C。
First at long 300mm, wide 200mm, the AZ31 magnesium alloy plate of thick 10mm is got on the bus and is cut out high 45mm, and diameter is the cylindric test specimen of 8mm。
Adopting device as shown in Figure 1 to carry out pole rolling over mocha work, wherein angular velocity is 400r/min, and rolling over gait of march of rubbing is 53mm/min, drafts is 1.0mm, adopts emulsion to be lubricated, and rolling over the head that rub is that plane does not have decorative pattern, the rolling head height that rubs is 5mm, and taking variable is 1mm, carries out 2 rollings and rubs。
As illustrated in Figures 5 and 6, it is the metallographic structure comparison diagram before and after mother metal milling, wherein before milling, crystallite dimension is comparatively thick, there is little crystal grain, mother metal uneven microstructure by larger-size crystal grain, after processing, crystal grain becomes tiny elongation shape, average grain size is about 6～7 μm, illustrates that adopting methods and apparatus of the present invention that the surface of low-melting-point metal can be made to obtain crystal grain is refined, and even tissue after milling, material surface intensity is increased, and anti-wear performance and fatigue behaviour improve。
Embodiment two:
The present embodiment and embodiment one the difference is that, there is decorative pattern in the milling face of milling head, for the B decorative pattern in Fig. 3, AZ31 magnesium alloy is carried out hoop and rolles over mocha workpiece interface crystal grain result as shown in Figure 7, adopt rub with the rolling of decorative pattern time, roll over frictional force when rubbing and surface shearing stress increase, the degree of metal fining and scope increase, the scope of transition region reduces simultaneously, and crystallite dimension is about 3～4 μm。
Embodiment three:
In conjunction with illustrated method and apparatus, cylindrical shape 6063 rods and bars of aluminium alloy that diameter is 5mm is carried out hoop and rolles over mocha work。Adopting device as shown in Figure 1, wherein spin velocity is 400r/min, and it is 53mm/min that the gait of march rubbed is rolled on travelling surface, drafts is 1mm, adopts emulsion to be lubricated, and rolling over the head that rub is that plane is without decorative pattern, the rolling head height that rubs is 5mm, and taking variable is 1mm, carries out 1 rolling and rubs。As shown in Figure 8 and Figure 9 for the surface transmission microphotograph of test specimen after the front test specimen of processing and processing。The crystallite dimension of mother metal is that after 2～3 μm (Fig. 8) processing, aluminium bar surface texture thinning effect is obvious, average grain size 0.5～0.9 μm (Fig. 9) after processing so that crystallite dimension reaches super-refinement and even tissue。
Claims (10)
1. a low-melting-point metal hoop rolles over surface super-refinement method of rubbing, it is characterized in that, pending for low-melting-point metal test specimen is processed into cylindrical shape, the pending test specimen of low-melting-point metal making cylindrical shape carries out rotation along the surfaces of revolution, and the pending test specimen of low-melting-point metal is carried out travelling surface milling by the generatrix direction of the pending test specimen of low-melting-point metal along the cylindrical shape of rotation。
2. low-melting-point metal hoop as claimed in claim 1 rolles over surface super-refinement method of rubbing, it is characterised in that the spin velocity of the pending test specimen of low-melting-point metal of described cylindrical shape is 2～10 with the gait of march ratio of travelling surface milling；The unit of spin velocity is r/min, and gait of march unit is mm/min。
3. low-melting-point metal hoop as claimed in claim 1 or 2 rolles over surface super-refinement method of rubbing, it is characterised in that drafts when the pending test specimen of low-melting-point metal is carried out travelling surface milling is 0.2～1.2mm。
4. low-melting-point metal hoop as claimed in claim 1 or 2 rolles over surface super-refinement method of rubbing, it is characterised in that described low-melting-point metal is AZ31 magnesium alloy, and drafts when the pending test specimen of AZ31 magnesium alloy is carried out travelling surface milling is 0.2～1mm。
5. low-melting-point metal hoop as claimed in claim 1 or 2 rolles over surface super-refinement method of rubbing, it is characterised in that the area ratio of the lateral area carrying out the unit milling area of travelling surface milling and the pending test specimen of low-melting-point metal of cylindrical shape is 1:4～24。
6. realize claim 1, 2, 3, low-melting-point metal hoop described in 4 or 5 rolles over the device of surface super-refinement method of rubbing, it is characterized in that, rotation component is clamped including test specimen, pressure control milling component, cooling component (13) and vertical feeding component, test specimen clamping rotation component is for the pending test specimen of the low-melting-point metal (10) of clamp cylinders body shape and controls it and carries out rotation along the surfaces of revolution, pressure control milling component generatrix direction of the pending test specimen of low-melting-point metal (10) along cylindrical shape under the drive of vertical feeding component carries out travelling milling, the pending test specimen of the low-melting-point metal (10) of the cylindrical shape in the course of processing is cooled down by cooling component (13)。
7. realize low-melting-point metal hoop as claimed in claim 6 and roll over the device of surface super-refinement method of rubbing, it is characterized in that, described pressure control milling component includes milling head (1) and the pressure device (3) coaxially connected with milling head (1), and fix vertical with the mobile terminal of vertical feeding component of pressure device (3) is connected。
8. realize low-melting-point metal hoop as claimed in claim 7 and roll over the device of surface super-refinement method of rubbing, it is characterised in that the milling face of described milling head (1) is arcwall face, and the radian of arcwall face is
9. realize low-melting-point metal hoop as claimed in claim 6 and roll over the device of surface super-refinement method of rubbing, it is characterized in that, described test specimen clamping rotation component includes three ratchets (8) and rotation motor (7), the pending test specimen of the low-melting-point metal (10) of three ratchets (8) clamp cylinders body shape, rotation motor (7) drive three ratchets (8) test specimen (10) pending with the low-melting-point metal of cylindrical shape together with carry out rotation along the surfaces of revolution。
10. realize low-melting-point metal hoop as claimed in claim 9 and roll over the device of surface super-refinement method of rubbing, it is characterized in that, described test specimen clamping rotation component also includes thimble (12), thimble (12) is positioned at the top of three ratchets (8), three ratchets (8) are by a bottom end clamping of pending for the low-melting-point metal of cylindrical shape test specimen (10), and thimble (12) holds out against in another bottom surface of the pending test specimen of the low-melting-point metal (10) of cylindrical shape。
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| CN104278132A (en) * | 2013-07-10 | 2015-01-14 | 中国科学院金属研究所 | Method for improving low-activation ferrite/martensitic steel high-temperature oxidation resistance |
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| CN105238916A (en) * | 2015-09-30 | 2016-01-13 | 北京有色金属研究总院 | Device and method for treating surface layer of metal material through plastic deformation |
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- 2016-02-02 CN CN201610072728.4A patent/CN105695904B/en not_active Expired - Fee Related
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| CN101323900A (en) * | 2007-06-15 | 2008-12-17 | 中国科学院金属研究所 | High speed processing method for realizing superfine crystal grain structure on metallic material surface |
| CN101513645A (en) * | 2009-03-17 | 2009-08-26 | 华东理工大学 | Method for preparing nano structure superficial layer of metal materials and device thereof |
| CN102643966A (en) * | 2012-04-10 | 2012-08-22 | 中国科学院金属研究所 | Method for forming nanometer gradient structure on surface layer of shaft metallic material |
| CN104278132A (en) * | 2013-07-10 | 2015-01-14 | 中国科学院金属研究所 | Method for improving low-activation ferrite/martensitic steel high-temperature oxidation resistance |
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