CN104017967A - Preparation method and application of high-strength high-plasticity stainless steel - Google Patents
Preparation method and application of high-strength high-plasticity stainless steel Download PDFInfo
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Abstract
The invention belongs to the technical field of preparation of high-strength stainless steel, and discloses a preparation method and application of high-strength high-plasticity stainless steel. The preparation method comprises the following concrete steps: putting an austenitic stainless steel sample into a preheated ECAP mold, keeping warm, performing repeated extrusion, taking out the sample, putting into a thermal treatment furnace, performing annealing processing, and performing air cooling to room temperature, so as to obtain the high-strength high-plasticity stainless steel. According to the preparation method, the ECAP technology is utilized for preparing the single-nanocrystal-structure stainless steel, then the single-nanocrystal-structure stainless steel is subjected to annealing processing, and through control on technological parameters, changing from a single nanocrystal structure to a double-dimension structure is realized. An ultrafine grain part is utilized for improving the strength and a coarse grain part is utilized for recovering plasticity, so that high-strength high-plasticity novel stainless steel with excellent comprehensive performances is obtained. Under the premise that the austenitic stainless steel possesses good extensibility, the austenitic stainless steel has the hardness of 393 HV and the yield strength of 750 MPa, and is widely applicable to engineering fields with relatively high requirements.
Description
Technical field
The invention belongs to high-strength stainless steel preparing technical field, particularly a kind of high-strength high-plasticity stainless steel and its preparation method and application.
Background technology
Since Brearly from Britain in 1913 proposes the concept of " stainless steel " first, from the ferritic stainless steel starting most to austenitic stainless steel, various Ultra-low carbon high-performance stainless steels till now again, stainless refining process and use range have all obtained great development, and the steel grade of production has reached hundreds of.Stainless material becomes industry and the indispensable important engineering materials of military developments with its excellent corrosion resistance nature and certain mechanical property, and range of application spreads all over the every field such as oil, chemical industry, weaving, nuclear energy and aviation.Within 2005, China's stainless steel consumption is 5,220,000 tons, than 2004, increases by 16.7%, within continuous 5 years, keeps the first in the world.Along with further developing of the causes such as modern chemical industry, household electrical appliances, medicine equipment and modern marine, stainless performance has also been proposed to higher service requirements.
Conventionally there is intensity and the lower deficiency of hardness in austenitic stainless steel, yield deformation easily occurs the product that makes to be made by austenitic stainless steel causes and lost efficacy or wearing and tearing, thereby reduce the work-ing life of product, therefore need some special process of exploitation to improve intensity and the hardness of austenitic stainless steel, thereby reach the object of improving material property, improving the quality of products.
A large amount of researchs show, Ultra-fine Grained/nano-crystallization can significantly improve stainless intensity and hardness, but take, to sacrifice plasticity be cost.Equal channel angular pressing platen press (Equal Channel Angular Processing, ECAP) be a kind of method of effectively obtaining nanocrystalline or super fine crystal material, it be the eighties in 20th century USSR (Union of Soviet Socialist Republics) scientist Segal when the deformation texture of Study on Steel and microstructure, a kind of large plastometric set method of developing for obtaining pure shear strain, object is the three-dimensional dimension that does not change material, repeatedly pushes and obtains special deformation texture.After the nineties, R.Z.Valiev utilizes this technology to make the large strain of material production carry out refinement polycrystalline material, has obtained submicron order or nano level ultra-fine grained structure material.The research that utilizes at present ECAP technique to prepare block body ultrafine grain material is mostly limited to that intensity is lower, the good material of ductility, and as Al, Cu, pure Ni, pure iron etc., extrusion process is at room temperature carried out.Such as J.W.Wang etc., at room temperature use ECAP method that 1060 commercial fine aluminiums are prepared to the sample that the wide approximately 1～2um of crystal grain is about 2～3um through two passages extruding.Bc path in the employing ECAP methods such as SeungZeon Han has obtained through 4 passages extruding the super fine crystal material that crystal grain diameter is about 300nm fine copper.K.Sitarama Raju etc. utilizes Bc path in ECAP method that pure nickel has been obtained to the sample that average grain size is 0.23um through 12 passages extruding.M.Sus-Ryszkowska etc. utilize ECAP method that pure iron is pushed through 12 passages, make strain reach 13.8, finally obtain the super fine crystal material that average grain size is 170nm.
Summary of the invention
In order to overcome the shortcoming and deficiency that above-mentioned existing austenite stainless hardness of steel and hardness are lower, primary and foremost purpose of the present invention is to provide a kind of high-strength high-plasticity stainless preparation method.The method first prepares Ultra-fine Grained/nano-crystallization austenitic stainless steel, by it is heat-treated, obtain coarse-grain+Ultra-fine Grained/nanocrystalline two yardstick structures, utilize coarse-grain structure to recover stainless good plasticity, utilize Ultra-fine Grained/nanocrystalline structure to keep its high strength simultaneously, thereby reach, obtain high strength, the stainless object of high-ductility.
The high-strength high-plasticity stainless steel that provides aforesaid method to prepare is provided another object of the present invention.
Still a further object of the present invention is to provide the application of above-mentioned high-strength high-plasticity stainless steel in engineering field.
Object of the present invention realizes by following proposal:
The stainless preparation method of high-strength high-plasticity, comprises following concrete steps:
Austenitic stainless steel sample is put into pre-warmed ECAP mould, and insulation, repeatedly, after extruding, takes out sample and puts into heat treatment furnace, carries out anneal, and air cooling, to room temperature, obtains high-strength high-plasticity stainless steel.
Preferably, the technique of described anneal, for to process 20～45min at 700～800 ℃, is more preferably processed 30min at 750 ℃.The present invention controls this annealing treating process can become single nanocrystalline structure stainless steel two yardstick structure stainless steels, utilize Ultra-fine Grained partly to improve stainless steel intensity, utilize coarse-grain partly to recover stainless steel plasticity, thereby finally obtain the new type stainless steel. corrosion resistance of the excellent combination property of high strength, high-ductility, and this new type stainless steel. corrosion resistance is realized high-strength, high-ductility matched well.And according to experimental studies results, in condition processing range of the present invention, could obtain the two yardstick structures of above-mentioned target, obtain new type stainless steel. corrosion resistance.
Described repeatedly extruding refers to push 6～8 passages, is preferably 8 passages.
The speed of described extruding is 100～200mm/min, and extruding path is Bc.
Preferably, described pre-warmed ECAP die temperature is 450 ℃～500 ℃.
Preferably, the time of described insulation is 20～30min.
The high-strength high-plasticity stainless steel that preparation method of the present invention obtains, keeping under the prerequisite of 41% unit elongation, obtained the hardness up to 361HV, even can be up to 393HV, overcome original austenite stainless steel intensity and the lower deficiency of hardness, can be applicable to the engineering field higher to material mechanical performance requirement.
Mechanism of the present invention is:
The present invention utilizes ECAP technique to prepare single nanocrystalline structure stainless steel, again it is carried out to anneal, by the control of processing parameter, realize single nanocrystalline structure to the variation of two yardstick structures, with Ultra-fine Grained, partly improve stainless steel intensity, utilize coarse-grain partly to recover stainless steel plasticity, thereby finally obtain the new type stainless steel. corrosion resistance of the excellent combination property of high strength, high-ductility.
Compared with prior art, the invention has the beneficial effects as follows:
(1) the present invention prepares high-strength high-plasticity new type stainless steel. corrosion resistance and has up to the hardness of 393HV and the yield strength of 750MPa, can be widely used in the higher engineering field of requirement, keeping under original performance prerequisite of austenitic stainless steel good-extensibility, overcome it due to existing intensity and the lower deficiency of hardness, yield deformation easily occurs the product that makes to be made by austenitic stainless steel causes and lost efficacy or wearing and tearing, thereby reduces deficiency and the defect in the work-ing life of product.
(2) processing step of the present invention is simple and easy to do, with low cost, has higher market using value.
Accompanying drawing explanation
Fig. 1 is stainless microhardness changing conditions before and after embodiment 1～3 thermal treatment.
Fig. 2 is stainless yield strength before and after embodiment 1～3 thermal treatment, unit elongation changing conditions.
Fig. 3 is the TEM figure of original nano-crystalline stainless steel before anneal, and wherein (a) is bright field image, is (b) dark field image.
Fig. 4 is the EBSD figure of embodiment 1～3 new type stainless steel. corrosion resistance.
Fig. 5 is the grain size distribution histogram of embodiment 1～3 new type stainless steel. corrosion resistance.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail, but embodiments of the present invention are not limited to this.
Embodiment 1: the preparation of high strength, high-ductility new type stainless steel. corrosion resistance
Starting materials: 304 austenitic stainless steels
Size: Φ 10 * 45mm
2
Composition: as table 1
The stainless chemical composition of table 1 starting material 304
| Element | C | Si | Mn | Cr | Ni | S | P |
| Content (wt%) | 0.056 | 0.44 | 1.54 | 18.0 | 9.82 | 0.02 | 0.016 |
Preparation method comprises the steps:
(1) ECAP extruding: first by ECAP mold heated to 500 ℃, then stainless steel sample is put into mould and be incubated 20～30 minutes, with the stainless steel sample of guaranteeing to put into, at 500 ℃, be incubated for some time, then push, extrusion speed is 200mm/min, extruding path Bc, coextrusion 8 passages.
(2) annealing process: the stainless steel sample after above-mentioned extruding is carried out to the anneal of 700 ℃-30min, then air cooling, to room temperature, obtains high strength, high-ductility new type stainless steel. corrosion resistance.
Embodiment 2: the preparation of high strength, high-ductility new type stainless steel. corrosion resistance
Starting materials: 304 austenitic stainless steels
Size: Φ 10 * 45mm
2
Composition: as table 1
Preparation method comprises the steps:
(1) ECAP extruding: first by ECAP mold heated to 500 ℃, then stainless steel sample is put into mould and be incubated 20～30 minutes, with the stainless steel sample of guaranteeing to put into, at 500 ℃, be incubated for some time, then push, extrusion speed is 200mm/min, extruding path Bc, coextrusion 8 passages.
(2) annealing process: the stainless steel sample after above-mentioned extruding is carried out to the anneal of 750 ℃-30min, then air cooling, to room temperature, obtains high strength, high-ductility new type stainless steel. corrosion resistance.
Embodiment 3: the preparation of high strength, high-ductility new type stainless steel. corrosion resistance
Starting materials: 304 austenitic stainless steels
Size: Φ 10 * 45mm
2
Composition: as table 1
Preparation method comprises the steps:
(1) ECAP extruding: first by ECAP mold heated to 500 ℃, then stainless steel sample is put into mould and be incubated 20～30 minutes, with the stainless steel sample of guaranteeing to put into, at 500 ℃, be incubated for some time, then push, extrusion speed is 200mm/min, extruding path Bc, coextrusion 8 passages.
(2) annealing process: the stainless steel sample after above-mentioned extruding is carried out to the anneal of 800 ℃-30min, then air cooling, to room temperature, obtains high strength, high-ductility new type stainless steel. corrosion resistance.
Embodiment 4: the preparation of high strength, high-ductility new type stainless steel. corrosion resistance
Starting materials: 304 austenitic stainless steels
Size: Φ 10 * 45mm
2
Composition: as table 1
Preparation method comprises the steps:
(1) ECAP extruding: first by ECAP mold heated to 500 ℃, then stainless steel sample is put into mould and be incubated 20～30 minutes, with the stainless steel sample of guaranteeing to put into, at 500 ℃, be incubated for some time, then push, extrusion speed is 100mm/min, extruding path Bc, coextrusion 7 passages.
(2) annealing process: the stainless steel sample after above-mentioned extruding is carried out to the anneal of 700 ℃-20min, then air cooling, to room temperature, obtains high strength, high-ductility new type stainless steel. corrosion resistance.
Embodiment 5: the preparation of high strength, high-ductility new type stainless steel. corrosion resistance
Starting materials: 304 austenitic stainless steels
Size: Φ 10 * 45mm
2
Composition: as table 1
Preparation method comprises the steps:
(1) ECAP extruding: first by ECAP mold heated to 500 ℃, then stainless steel sample is put into mould and be incubated 20～30 minutes, with the stainless steel sample of guaranteeing to put into, at 500 ℃, be incubated for some time, then push, extrusion speed is 100mm/min, extruding path Bc, coextrusion 7 passages.
(2) annealing process: the stainless steel sample after above-mentioned extruding is carried out to the anneal of 750 ℃-20min, then air cooling, to room temperature, obtains high strength, high-ductility new type stainless steel. corrosion resistance.
Embodiment 6: the preparation of high strength, high-ductility new type stainless steel. corrosion resistance
Starting materials: 304 austenitic stainless steels
Size: Φ 10 * 45mm
2
Composition: as table 1
Preparation method comprises the steps:
(1) ECAP extruding: first by ECAP mold heated to 500 ℃, then stainless steel sample is put into mould and be incubated 20～30 minutes, with the stainless steel sample of guaranteeing to put into, at 500 ℃, be incubated for some time, then push, extrusion speed is 100mm/min, extruding path Bc, coextrusion 7 passages.
(2) annealing process: the stainless steel sample after above-mentioned extruding is carried out to the anneal of 800 ℃-20min, then air cooling, to room temperature, obtains high strength, high-ductility new type stainless steel. corrosion resistance.
Embodiment 7: the preparation of high strength, high-ductility new type stainless steel. corrosion resistance
Starting materials: 304 austenitic stainless steels
Size: Φ 10 * 45mm
2
Composition: as table 1
Preparation method comprises the steps:
(1) ECAP extruding: first by ECAP mold heated to 500 ℃, then stainless steel sample is put into mould and be incubated 20～30 minutes, with the stainless steel sample of guaranteeing to put into, at 500 ℃, be incubated for some time, then push, extrusion speed is 150mm/min, extruding path Bc, coextrusion 6 passages.
(2) annealing process: the stainless steel sample after above-mentioned extruding is carried out to the anneal of 700 ℃-40min, then air cooling, to room temperature, obtains high strength, high-ductility new type stainless steel. corrosion resistance.
Embodiment 8: the preparation of high strength, high-ductility new type stainless steel. corrosion resistance
Starting materials: 304 austenitic stainless steels
Size: Φ 10 * 45mm
2
Composition: as table 1
Preparation method comprises the steps:
(1) ECAP extruding: first by ECAP mold heated to 500 ℃, then stainless steel sample is put into mould and be incubated 20～30 minutes, with the stainless steel sample of guaranteeing to put into, at 500 ℃, be incubated for some time, then push, extrusion speed is 150mm/min, extruding path Bc, coextrusion 6 passages.
(2) annealing process: the stainless steel sample after above-mentioned extruding is carried out to the anneal of 750 ℃-45min, then air cooling, to room temperature, obtains high strength, high-ductility new type stainless steel. corrosion resistance.
Embodiment 9: the preparation of high strength, high-ductility new type stainless steel. corrosion resistance
Starting materials: 304 austenitic stainless steels
Size: Φ 10 * 45mm
2
Composition: as table 1
Preparation method comprises the steps:
(1) ECAP extruding: first by ECAP mold heated to 500 ℃, then stainless steel sample is put into mould and be incubated 20～30 minutes, with the stainless steel sample of guaranteeing to put into, at 500 ℃, be incubated for some time, then push, extrusion speed is 150mm/min, extruding path Bc, coextrusion 6 passages.
(2) annealing process: the stainless steel sample after above-mentioned extruding is carried out to the anneal of 800 ℃-40min, then air cooling, to room temperature, obtains high strength, high-ductility new type stainless steel. corrosion resistance.
Embodiment 10: the performance test of embodiment 1～3 new type stainless steel. corrosion resistance
(1) hardness
This test is to carry out on the cross section of sample, and concrete test process is in sample central position, to test altogether 5 points to average as last hardness value.Finally record microhardness before and after the sample thermal treatment of embodiment 1～3 as table 2.In table 2, list file names with the data of yield strength, unit elongation.Embodiment 1～3 hardness value of gained new type stainless steel. corrosion resistance and the relation of annealing temperature are as Fig. 1.Here in order to contrast, the hardness value of nano-crystalline stainless steel before original coarse-grain and thermal treatment is also provided in the lump.
(2) yield strength
This test is to carry out on the vertical section of sample, cuts tension specimen respectively on the vertical section of 3 embodiment samples.Finally record yield strength value before and after the sample thermal treatment of embodiment 1～3 in Table 2 and Fig. 2.In order to contrast, the yield strength value of original coarse-grain, nano-crystalline stainless steel is also provided in the lump.
(3) plasticity (unit elongation)
This test is to utilize the unit elongation of sample to characterize its plasticity, records unit elongation before and after the sample thermal treatment of embodiment 1～3 in Table 2 and Fig. 2.In order to contrast, the unit elongation of original coarse-grain and nano-crystalline stainless steel is also provided in the lump.
Hardness value (HV) before and after the sample thermal treatment of table 2 embodiment 1～3
| ? | Original coarse-grain | Nanocrystalline | Embodiment 1 | Embodiment 2 | Embodiment 3 |
| Hardness (HV) | 189 | 476 | 393 | 361 | 263 |
| Yield strength (MPa) | 293 | 1314 | 1045 | 725 | 550 |
| Unit elongation (%) | 68 | 11 | 26 | 41 | 42 |
Interpretation of result:
(1) hardness: can clearly find out from table 2 and Fig. 1, after coarse grained austenite stainless steel nanometer, hardness significantly increases, and is increased to 476HV from 189HV, and with the increase of thermal treatment temp, hardness declines gradually.Wherein, in embodiment 1, through 700 ℃ of anneal, the 476HV of hardness from annealing is down to 393HV; In embodiment 2, through 750 ℃ of anneal, hardness continues to drop to 361HV; In embodiment 3, through 800 ℃ of anneal, stainless hardness further drops to 263HV.But the hardness of the new type stainless steel. corrosion resistance after processing in embodiment 1～3 is all higher than the stainless hardness of original coarse-grain.
(2) yield strength: from table 2 and Fig. 2, the yield strength of new type stainless steel. corrosion resistance of the present invention is similar with the variation tendency of annealing temperature with variation tendency and its hardness of annealing temperature.After coarse grained austenite stainless steel nanometer, yield strength significantly increases, and from 293MPa, is increased to 1314MPa, and with the increase of thermal treatment temp, intensity declines gradually.Wherein, in embodiment 1, through 700 ℃ of anneal, the 1314MPa of intensity from annealing is down to 1045MPa; In embodiment 2, through 750 ℃ of anneal, intensity continues to drop to 725MPa; In embodiment 3, through 800 ℃ of anneal, stainless intensity further drops to 550MPa.But the intensity of the new type stainless steel. corrosion resistance after processing in embodiment 1～3 is all higher than the stainless intensity of original coarse-grain.
(3) plasticity: from table 2 and Fig. 2, each embodiment unit elongation is just contrary with the variation tendency of its hardness, intensity annealing temperature with the variation tendency of annealing temperature.After coarse grained austenite stainless steel nanometer, unit elongation obviously declines, and is reduced to 11% from 68%, and with the increase of thermal treatment temp, unit elongation recovers gradually.Wherein in embodiment 1, through 700 ℃ of anneal, unit elongation 11% is increased to 26% from annealing; In embodiment 2, through 750 ℃ of anneal, unit elongation continues to be increased to 41%; In embodiment 3, through 800 ℃ of anneal, stainless unit elongation is increased to 42%, and increasing degree obviously declines.
From finding out the test result of stainless hardness, intensity and unit elongation each embodiment above, the stainless steel in embodiment 2 keeps the better coupling of high strength (yield strength 725MPa), high-ductility (unit elongation 41%).
Embodiment 11: the microtexture test of embodiment 1～3 new type stainless steel. corrosion resistance
The microtexture that this test utilizes transmission electron microscope (TEM) to observe original nano-crystalline stainless steel, utilizes Electron Back-Scattered Diffraction (EBSD) to analyze the microtexture of each embodiment sample.The TEM picture of original nano-crystalline stainless steel is as Fig. 3, and in embodiment 1～3, stainless heterogeneous microstructure is distinguished corresponding diagram 4 (a), Fig. 4 (b), Fig. 4 (c).
As can be seen from Figure 3, this stainless steel of Ovshinsky after 8 passage ECAP extruding, the obvious refinement of crystal grain, average grain size is about 80～120nm.
As can be seen from Figure 4, in embodiment 1 (700 ℃ of annealing) stainless steel, in crystal grain, two yardstick constitutional featuress are not obvious; In embodiment 2 (750 ℃ of annealing) stainless steel, recrystallize phenomenon is obvious, and in thin brilliant matrix, part crystal grain is obviously grown up, and coarse-grain and thin brilliant size differ obviously, presents typical two yardstick constitutional features; In embodiment 3 (800 ℃ of annealing) stainless steel, the content of coarse-grain increases gradually, and thin crystalline substance reduces gradually.
Utilize EBSD quantitative analysis to go out in each embodiment average grain size and the volume fraction of each scale crystal grain in stainless pair of yardstick structure.Fig. 5 has provided the stainless grain size distribution histogram of embodiment 1～3, thereby calculate volume fraction and the average grain size of micron order coarse-grain (> 1 μ m) and Ultra-fine Grained (< 1 μ m), calculation result is in Table 3, and providing the front original nanocrystalline data of anneal, the stainless steel in embodiment 1～3 is corresponding diagram 5 (a), Fig. 5 (b), Fig. 5 (c) respectively.
From Fig. 5 and table 3, can find out, the stainless average grain size of embodiment 1 (700 ℃) is 190nm, increases, but also do not reach the size of coarse-grain with respect to former nanocrystalline particle diameter; The average grain size that is less than the Ultra-fine Grained of 1 μ m in embodiment 2 (750 ℃) stainless steel is 348nm, accounts for 62%, and the average grain size that surpasses the coarse-grain of 1 μ m is 1.4 μ m, accounts for 38%, and two scale features are obvious; The volume fraction of embodiment 3 (800 ℃) coarse-grain obviously increases, and reaches 62%～72%, and the average grain size of coarse-grain slightly increases, and reaches 1.5～1.7 μ m.
Each scale crystal grain average grain size and volume fraction in table 3 embodiment 1～3 stainless steel
Above-described embodiment is preferably embodiment of the present invention; but embodiments of the present invention are not restricted to the described embodiments; other any do not deviate from change, the modification done under spirit of the present invention and principle, substitutes, combination, simplify; all should be equivalent substitute mode, within being included in protection scope of the present invention.
Claims (9)
1. the stainless preparation method of high-strength high-plasticity, it is characterized in that comprising following concrete steps: austenitic stainless steel sample is put into pre-warmed ECAP mould, insulation, repeatedly after extruding, take out sample and put into heat treatment furnace, carry out anneal, air cooling, to room temperature, obtains high-strength high-plasticity stainless steel.
2. the stainless preparation method of high-strength high-plasticity according to claim 1, is characterized in that: the technique of described anneal for to process 20～45min at 700～800 ℃.
3. the stainless preparation method of high-strength high-plasticity according to claim 1, is characterized in that: the technique of described anneal for to process 30min at 750 ℃.
4. the stainless preparation method of high-strength high-plasticity according to claim 1, is characterized in that: described repeatedly extruding refers to push 6～8 passages.
5. the stainless preparation method of high-strength high-plasticity according to claim 1, is characterized in that: the speed of described extruding is 100～200mm/min, and extruding path is Bc.
6. the stainless preparation method of high-strength high-plasticity according to claim 1, is characterized in that: described pre-warmed ECAP die temperature is 450 ℃～500 ℃.
7. the stainless preparation method of high-strength high-plasticity according to claim 1, is characterized in that: the time of described insulation is 20～30min.
8. a high-strength high-plasticity stainless steel, is characterized in that obtaining according to the stainless preparation method of high-strength high-plasticity described in claim 1～7 any one.
9. the application of high-strength high-plasticity stainless steel according to claim 8 in engineering field.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108348990A (en) * | 2015-11-12 | 2018-07-31 | 株式会社Posco | Austenitic stainless steel and its manufacturing method with excellent resistance to tangerine peel |
| CN110396573A (en) * | 2019-05-20 | 2019-11-01 | 安徽协同创新设计研究院有限公司 | A kind of process improving timber intensity and extensibility |
| CN111881562A (en) * | 2020-07-15 | 2020-11-03 | 中国核动力研究设计院 | Nuclear main pipeline material safety performance testing method and system based on flow intensity ratio |
| WO2021012322A1 (en) * | 2019-07-19 | 2021-01-28 | 东北大学 | High-strength-plasticity nano/submicron grain cold-rolled 304 stainless steel strip and preparation method therefor |
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| CN102329938A (en) * | 2011-10-25 | 2012-01-25 | 华南理工大学 | Preparation method for high-strength high-plasticity/toughness stainless steel |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108348990A (en) * | 2015-11-12 | 2018-07-31 | 株式会社Posco | Austenitic stainless steel and its manufacturing method with excellent resistance to tangerine peel |
| CN110396573A (en) * | 2019-05-20 | 2019-11-01 | 安徽协同创新设计研究院有限公司 | A kind of process improving timber intensity and extensibility |
| WO2021012322A1 (en) * | 2019-07-19 | 2021-01-28 | 东北大学 | High-strength-plasticity nano/submicron grain cold-rolled 304 stainless steel strip and preparation method therefor |
| CN111881562A (en) * | 2020-07-15 | 2020-11-03 | 中国核动力研究设计院 | Nuclear main pipeline material safety performance testing method and system based on flow intensity ratio |
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Application publication date: 20140903 |