CN103290183A - Method for improving intensity of metal material - Google Patents
Method for improving intensity of metal material Download PDFInfo
- Publication number
- CN103290183A CN103290183A CN2013102063443A CN201310206344A CN103290183A CN 103290183 A CN103290183 A CN 103290183A CN 2013102063443 A CN2013102063443 A CN 2013102063443A CN 201310206344 A CN201310206344 A CN 201310206344A CN 103290183 A CN103290183 A CN 103290183A
- Authority
- CN
- China
- Prior art keywords
- metal material
- metallic substance
- twin
- intensity
- stainless steels
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Heat Treatment Of Steel (AREA)
Abstract
The invention provides a method for improving the intensity of a metal material. The method comprises the following steps of: selecting the metal material, of which the plastic deformation is guided by twin crystal deformation or phase change; twisting the metal material, so that surface strain generated by the metal material meets predetermined conditions. According to the method provided by the invention, the intensity of the metal material can be improved observably without influences on the tension toughness of the metal material.
Description
Technical field
The present invention relates to metal material field, particularly relate to a kind of method that improves Strength of Metallic Materials.
Background technology
The intensity of metallic substance and tensile toughness (the length increment per-cent of material in drawing process) all are the emphasis of research all the time, its key factor is the antagonism between the two: in tradition processing or the art breading, when increasing one of them index, the another one index properties often worsens.
Pass through to reduce the way that grain-size is obtained the high strength of materials as common employing, when crystal grain is reduced to nanometer scale, (defines the nano-multicrystal material usually and refer to that its grain-size is less than 100 nanometers), its intensity can be than traditional crystalline material a high magnitude, but toughness also reduces a nearly magnitude accordingly.When the way by cold-rolling treatment improves crystal intensity in addition, also thereupon the reduction of its toughness.And common temper, then expendable material intensity when increasing toughness.
A trend of up-to-date metallic substance research is to introduce the twin structure of nanometer level in coarse grain material, utilize the high-sequential of twin, when increasing Strength of Metallic Materials, also allow it keep toughness preferably, the material for preparing like this is generally thin-film material, can't handle the material that engineering structure is used magnitude.Also having the another one direction is to introduce the nanometer gradient layer in traditional material: play inner its grain-size increases gradually from the surface of material, and the material that obtains of this way can only produce the gradient layer about 100 microns usually.This method is limited to the change of material macro property, intensity that can only a spot of raising material.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of method that improves Strength of Metallic Materials, significantly improving Strength of Metallic Materials, and does not influence the tensile toughness of metallic substance.
In order to solve the problems of the technologies described above, the invention provides a kind of method that improves Strength of Metallic Materials, comprising:
Choose viscous deformation by twin distortion or the leading metallic substance of phase transformation;
Described metallic substance is reversed, and predetermined condition is satisfied in the surface strains that described metallic substance is produced.
Further, aforesaid method also has following characteristics:
Described predetermined condition is that the surface shear strain is between 0～0.3.
Further, aforesaid method also has following characteristics:
Described predetermined condition is that the surface shear strain is between 0.2～0.3.
Further, aforesaid method also has following characteristics:
Described metallic substance is twin crystal inducing plasticity distortion steel or the leading viscous deformation steel of phase transformation
Further, aforesaid method also has following characteristics:
Described metallic substance is cold rolling 304 austenitic stainless steels.
The invention provides a kind of method that improves Strength of Metallic Materials; use the material metal material of magnitude at the engineering structure of mass-producing; as the most widely used 304 austenitic stainless steels in the world; adjust the microstructure of material internal by certain mechanical deformation; make material possess twin (phase) structure and twin (mutually) gradient simultaneously; the strength of materials after handling like this is significantly improved (doubling), and its tensile toughness remains unchanged even can increase to some extent.
Description of drawings
Fig. 1 is the schema of method of the raising Strength of Metallic Materials of the embodiment of the invention;
Fig. 2 is the process synoptic diagram to Typical Metals sample applied load;
Fig. 3 is for applying cold rolling 304 stainless steels after the torsional deformation because the martensitic phase Gradient distribution figure radially that deformation gradient causes;
Fig. 4 is for after applying torsional deformation to cold rolling 304 austenitic stainless steels, its tensile stress strain curve and comparison diagram without the stress-strain of cold rolling 304 austenitic stainless steels of handling.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, hereinafter will be elaborated to embodiments of the invention by reference to the accompanying drawings.Need to prove that under the situation of not conflicting, the embodiment among the application and the feature among the embodiment be arbitrary combination mutually.
Fig. 1 is the schema of method of the raising Strength of Metallic Materials of the embodiment of the invention, and as shown in Figure 1, the method for present embodiment may further comprise the steps:
S11, choose viscous deformation by twin distortion or the leading metallic substance of phase transformation;
S12, described metallic substance is reversed, predetermined condition is satisfied in the surface shear strain that described metallic substance is produced.
In the selection of present embodiment: be applicable to that viscous deformation is by twin distortion or the leading metallic substance of phase transformation.By such bar is applied torsional deformation, make material (1) produce a certain amount of twin or corresponding other phases (as austenite common in the steel transformation of martensitic phase in opposite directions); (2) radially there are certain gradient in twin or other phases, this is because in the torsional deformation process, the deflection maximum of the material production of outermost, and successively decrease along radial direction is linear also approaches zero to the radius twin that to be zero place caused by distortion or the density probability of occurrence of other phases; (3) because torsional load is different fully with draw direction, reverse the twin of stage generation or other on the crystal orientation with drawing process in the twin that occurs or other mutually different.This will make in follow-up drawing process, distortion will be no longer along taking place on the twin that produces with the stage of reversing or other the identical in opposite directions crystal orientation, intersect but form.
Predetermined condition among the step S12 is that described surface shear strain is between 0～0.3, make the surface shear strain of metallic substance generation when namely reversing metallic substance in 0～0.3 scope, along with the surface shear strain of reversing realization increases, YIELD STRENGTH is increased to 110% from 0, and its stretching plastic remains unchanged.
Predetermined condition among the step S12 is preferably the surface shear strain between 0.2～0.3, and YIELD STRENGTH is increased to 70～110%, and its stretching plastic remains unchanged.
Fig. 2 is the process synoptic diagram to Typical Metals sample applied load, and Fig. 2 has described the process of Typical Metals sample applied load and reversed the macroscopical twisting states in back.The method of present embodiment is not limited to sample size, can be applicable to arbitrarily big small sample.
The method of present embodiment has all obtained desirable effect at the distortion steel of twin crystal inducing plasticity for example with after cold rolling 304 austenitic stainless steels carry out identical processing: their strengths of materials separately all are significantly improved (doubling), and its tensile toughness remains unchanged even can increase to some extent.
Be that application example explains with cold rolling 304 austenitic stainless steels, cold rolling 304 austenitic stainless steels are applied torsional deformation after, radially there is certain gradient in martensitic phase.Outermost martensitic phase the highest (r=R), the center of material (r=0) do not have martensitic phase substantially, and radius is the r=R/2 position of bar, the density of martensitic phase is between the above two.
What follow this martensitic phase gradient is to form the intensity gradient that a radial direction changes on the mechanics, as shown in Figure 3, after cold rolling 304 austenitic stainless steels are applied torsional deformation, because the martensitic phase Gradient distribution radially that deformation gradient causes forms remarkable hardness (intensity) gradient radially on the mechanics.
Fig. 4 is for applying (the surface shear strain of bar outermost is about 30%) after the 270 degree torsional deformations to cold rolling 304 austenitic stainless steels, its tensile stress strain curve and contrast without the stress-strain of cold rolling 304 austenitic stainless steels of handling.
Because the generation of hardness (intensity) gradient, add twin crystal martensite that the stage of reversing produces on the crystal orientation with drawing process in occur mutually different.Make in the follow-up drawing process, distortion will be no longer along taking place on the martensitic phase crystal orientation in opposite directions that produces with the stage of reversing, therefore can effectively improve the intensity of material.Fig. 4 has provided undressed cold rolling 304 austenitic stainless steels and the tensile stress strain curve that applies cold rolling 304 austenitic stainless steels after 270 degree reverse, can clearly see that the yield strength that applies 304 austenitic stainless steels after 270 degree reverse is increased to 660 MPas, be more than a times of undressed cold rolling 304 austenitic stainless steels (310 MPa).Tensile toughness does not between the two have to change substantially simultaneously.Same process also is applicable to iron, manganese, carbon series twin steel.
Below only be the preferred embodiments of the present invention; certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection domain of the appended claim of the present invention.
Claims (5)
1. method that improves Strength of Metallic Materials comprises:
Choose viscous deformation by twin distortion or the leading metallic substance of phase transformation;
Described metallic substance is reversed, and predetermined condition is satisfied in the surface shear strain that described metallic substance is produced.
2. the method for claim 1 is characterized in that:
Described predetermined condition is that described surface shear strain is between 0～0.3.
3. the method for claim 1 is characterized in that:
Described predetermined condition is that described surface shear strain is between 0.2～0.3.
4. as each described method of claim 1-3, it is characterized in that:
Described metallic substance is the steel of twin crystal inducing plasticity distortion steel or the leading viscous deformation of phase transformation.
5. as each described method of claim 1-3, it is characterized in that:
Described metallic substance is cold rolling 304 austenitic stainless steels.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310206344.3A CN103290183B (en) | 2013-05-29 | 2013-05-29 | Method for improving intensity of metal material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310206344.3A CN103290183B (en) | 2013-05-29 | 2013-05-29 | Method for improving intensity of metal material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103290183A true CN103290183A (en) | 2013-09-11 |
| CN103290183B CN103290183B (en) | 2015-03-18 |
Family
ID=49091709
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310206344.3A Expired - Fee Related CN103290183B (en) | 2013-05-29 | 2013-05-29 | Method for improving intensity of metal material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103290183B (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106011417A (en) * | 2016-07-29 | 2016-10-12 | 何东 | Method for preparing rodlike metal gradient nano structure |
| CN106906343A (en) * | 2017-03-08 | 2017-06-30 | 河南科技大学 | A kind of method, stainless steel bars that gradient nano tissue is formed on inferior stable state austenitic stainless steel bar material top layer |
| CN107893154A (en) * | 2017-11-22 | 2018-04-10 | 西南大学 | A kind of preparation method of high-strength and high ductility gradient martensitic-austenitic dual phase steel |
| CN108359780A (en) * | 2018-04-09 | 2018-08-03 | 西南交通大学 | The method for improving metastable state austenite stainless hardness of steel and anti-stress corrosion performance |
| CN109821946A (en) * | 2019-03-20 | 2019-05-31 | 燕山大学 | A kind of austenitic stainless steel bar material processing unit (plant) and method |
| WO2019227786A1 (en) * | 2018-05-31 | 2019-12-05 | 中国科学院金属研究所 | Method for improving mechanical properties of metal material by changing gradient nanotwinned crystalline structure of material |
| CN110923430A (en) * | 2019-10-30 | 2020-03-27 | 中国科学院金属研究所 | Preparation method of high-strength and high-plasticity 304 austenitic stainless steel with low martensite content |
| CN110923438A (en) * | 2019-10-30 | 2020-03-27 | 中国科学院金属研究所 | Circular torsion machining process for improving mechanical property of metal material |
| CN110964892A (en) * | 2018-09-27 | 2020-04-07 | 西门子股份公司 | Method for balancing strength and ductility of metal material |
| US12000057B2 (en) | 2018-05-31 | 2024-06-04 | Institute Of Metal Research, Chinese Academy Of Sciences | Method for improving mechanical properties by changing gradient nanotwinned structure of metallic material |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110551948B (en) * | 2019-10-22 | 2021-05-04 | 河北工程大学 | Low-carbon steel and preparation method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1637162A (en) * | 2003-01-10 | 2005-07-13 | 西北工业大学 | Prepn of rod superfine crystal material |
-
2013
- 2013-05-29 CN CN201310206344.3A patent/CN103290183B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1637162A (en) * | 2003-01-10 | 2005-07-13 | 西北工业大学 | Prepn of rod superfine crystal material |
Non-Patent Citations (1)
| Title |
|---|
| 邵宝庆: "低碳钢扭转硬化拉伸强度的实验研究", 《应用力学学报》 * |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106011417A (en) * | 2016-07-29 | 2016-10-12 | 何东 | Method for preparing rodlike metal gradient nano structure |
| CN106906343A (en) * | 2017-03-08 | 2017-06-30 | 河南科技大学 | A kind of method, stainless steel bars that gradient nano tissue is formed on inferior stable state austenitic stainless steel bar material top layer |
| CN107893154A (en) * | 2017-11-22 | 2018-04-10 | 西南大学 | A kind of preparation method of high-strength and high ductility gradient martensitic-austenitic dual phase steel |
| CN107893154B (en) * | 2017-11-22 | 2019-10-08 | 西南大学 | A kind of preparation method of high-strength and high ductility gradient martensitic-austenitic dual phase steel |
| CN108359780A (en) * | 2018-04-09 | 2018-08-03 | 西南交通大学 | The method for improving metastable state austenite stainless hardness of steel and anti-stress corrosion performance |
| WO2019227786A1 (en) * | 2018-05-31 | 2019-12-05 | 中国科学院金属研究所 | Method for improving mechanical properties of metal material by changing gradient nanotwinned crystalline structure of material |
| US12000057B2 (en) | 2018-05-31 | 2024-06-04 | Institute Of Metal Research, Chinese Academy Of Sciences | Method for improving mechanical properties by changing gradient nanotwinned structure of metallic material |
| CN110964892A (en) * | 2018-09-27 | 2020-04-07 | 西门子股份公司 | Method for balancing strength and ductility of metal material |
| CN109821946A (en) * | 2019-03-20 | 2019-05-31 | 燕山大学 | A kind of austenitic stainless steel bar material processing unit (plant) and method |
| CN109821946B (en) * | 2019-03-20 | 2020-04-21 | 燕山大学 | Austenitic stainless steel bar processing device and method |
| CN110923430A (en) * | 2019-10-30 | 2020-03-27 | 中国科学院金属研究所 | Preparation method of high-strength and high-plasticity 304 austenitic stainless steel with low martensite content |
| CN110923438A (en) * | 2019-10-30 | 2020-03-27 | 中国科学院金属研究所 | Circular torsion machining process for improving mechanical property of metal material |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103290183B (en) | 2015-03-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103290183B (en) | Method for improving intensity of metal material | |
| Eskandari et al. | Effect of strain-induced martensite on the formation of nanocrystalline 316L stainless steel after cold rolling and annealing | |
| JP6005218B2 (en) | Austenitic stainless steel sheet and method for producing highly elastic non-magnetic steel material using the same | |
| CN104471092B (en) | The small ferrite austenite two-phase stainless steel plate of intra-face anisotropy and its manufacture method | |
| CN101914723B (en) | Hot-rolling large-deformation-resistance pipeline steel and preparation method thereof | |
| JP5407178B2 (en) | Steel wire rod for cold forging excellent in cold workability and manufacturing method thereof | |
| US20120305146A1 (en) | Non-quenched and tempered steel having ultrafine grained pearlite structure and method of manufacturing the same | |
| Cardona et al. | Microstructural evolution and microhardness in a low carbon steel processed by high-pressure torsion | |
| Sadeghpour et al. | Investigation of the effect of grain size on the strain-induced martensitic transformation in a high-Mn stainless steel using nanoindentation | |
| CN102356174A (en) | Micro-alloyed carbon steel as texture-rolled steel strip, in particular for spring elements | |
| WO2015102050A1 (en) | Steel material and process for producing same | |
| CN107208233B (en) | High tensile steel wire | |
| JP2015124442A (en) | Steel material for pressure vessel excellent in low temperature toughness and hydrogen sulfide stress corrosion cracking resistance, method for producing the same, and method for producing deep-drawn product therefrom | |
| JPWO2014157146A1 (en) | Austenitic stainless steel sheet and method for producing high-strength steel using the same | |
| AU2006336816B2 (en) | Strip of hot rolled micro-alloyed steel for obtaining finished pieces by cold pressing and shearing | |
| JP6082342B2 (en) | Manufacturing method of high carbon steel wire | |
| KR20210060528A (en) | Bolt steel and its manufacturing method | |
| Kondaveeti et al. | Metallurgical and mechanical properties of mild steel processed by Equal Channel Angular Pressing (ECAP) | |
| Wei et al. | Improving mechanical properties for pure irons by local surface mechanical attrition treatment | |
| Park et al. | High-cycle fatigue characteristics of non-heat-treated steels developed for bolt applications | |
| CN110629120A (en) | Cold-rolled non-oriented silicon steel with excellent magnetic property and production method thereof | |
| Wang et al. | Influence of cold rolling reduction on microstructure and mechanical properties in 204C2 austenitic stainless steel | |
| JPH1192860A (en) | Steel having ultrafine ferritic structure | |
| JP7368692B2 (en) | Manufacturing method of medium carbon steel plate | |
| JP2005298896A (en) | Hot rolled steel sheet having low yield ratio and excellent ductility |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150318 Termination date: 20190529 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |