WO2002061162A1 - Alliage de martensite refractaire possedant une excellente resistance a la rupture en fluage a haute temperature et une excellente endurance et procede de production de ce dernier - Google Patents
Alliage de martensite refractaire possedant une excellente resistance a la rupture en fluage a haute temperature et une excellente endurance et procede de production de ce dernier Download PDFInfo
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- WO2002061162A1 WO2002061162A1 PCT/JP2002/000776 JP0200776W WO02061162A1 WO 2002061162 A1 WO2002061162 A1 WO 2002061162A1 JP 0200776 W JP0200776 W JP 0200776W WO 02061162 A1 WO02061162 A1 WO 02061162A1
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/26—Ferrous alloys, e.g. steel alloys containing chromium with niobium or tantalum
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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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/002—Heat treatment of ferrous alloys containing Cr
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/24—Ferrous alloys, e.g. steel alloys containing chromium with vanadium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/30—Ferrous alloys, e.g. steel alloys containing chromium with cobalt
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/32—Ferrous alloys, e.g. steel alloys containing chromium with boron
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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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/008—Martensite
Definitions
- the invention of this application relates to a martensitic heat-resistant alloy having excellent high-temperature cleave rupture strength and ductility, and a method for producing the same. More specifically, the invention of this application relates to a martensitic heat-resistant alloy which has a long-term creep rupture strength at high temperature, and has excellent hot workability and ductility in addition to oxidation resistance. It relates to the manufacturing method.
- B and N are generally controlled to be B: 0.08% or less and N: 0.02-0.06% by weight%.
- N is an element that can be mixed in from the raw steel or atmosphere and contains about 0.02% even if it is to be reduced, and because N is contained in the alloy, Nb and V
- carbonitride precipitates and improves creep strength, for example, if it is added in a large amount exceeding 0.1%, creep rupture ductility, weldability and workability are impaired. This is because they are relatively aggressively added to the extent.
- B has a function to stabilize grain boundaries by finely dispersing precipitates by being contained in the alloy, and it can significantly improve the creep rupture strength even if a small amount is added. it can.
- B has a strong affinity for N, if added in a large amount, it precipitates as B, which not only loses the effect of improving properties by B and N, but also significantly impairs weldability and workability. Therefore, the added amount of B is 0. It was suppressed to about 0.8% or less and extremely small in consideration of the amount of N added.
- a ferritic heat-resistant steel or a martensitic heat-resistant steel to which a relatively large amount of B has been added or a welding material thereof are disclosed in, for example, Japanese Patent Application Laid-Open Nos. 6-101 and 8-210. It is also disclosed in JP-A-8-154, JP-A-8-22583, and JP-A-9-122297. However, in all of these cases, considering the above reasons, the amount of B added is insufficient relative to the amount of N added, and the dramatic amount expected to be obtained by the addition of B It did not achieve the effect of enhancing the cleave rupture strength.
- Japanese Patent Application Laid-Open No. 8-2949473 discloses a welding material for a steel sheet which has a specific AI, a relatively large amount of B, and a small amount of N. However, this was not satisfactory in terms of workability and the like, and did not realize high creep strength at a higher temperature and for a longer time.
- the invention of this application has been made in view of the circumstances described above, and solves the problems of the prior art, makes it possible to fully exert the effect of improving the characteristics by containing a large amount of B, It is an object of the present invention to provide a martensitic heat-resistant alloy having a high cleave rupture strength at a high temperature, excellent hot workability and ductility in addition to oxidation resistance, and a method for producing the same. Disclosure of the invention Therefore, the invention of this application has been made in view of the circumstances described above, and solves the problems of the prior art, and provides the following invention.
- composition is% by weight, C: 0.03 to 0.9%, Si: 0.01 to 0.9%, Mn : 0.01 to 1.5%, Cr: 8.0 to 3.0%, AI: 0.0005 to 0.005
- N 0 15%, M0: 2.0% or less, W: 4.0% or less, V: 0.05 to 0.5%, Nb: 0.01 to 0.2%, C0: 0 1 to 5.0%, B: 0.008 to 0.03%, N: less than 0.005%, the balance being Fe and inevitable impurities, (B) Mo, W, B and When the content of N is% by weight,
- the invention of this application relates to any one of the above-mentioned inventions.
- the alloy material having the composition described in any of the above inventions is subjected to normalization in which air is cooled after heating and holding in a temperature range of 1050 to 200 ° C. Then, a method for producing a martensitic heat-resistant alloy, characterized by performing tempering by air cooling after heating and holding at a temperature in the range of 750 to 850 ° C.
- FIG. 1 is a diagram exemplifying a stress-cleave rupture time diagram of the alloy of the present invention and a comparative alloy in Examples.
- FIG. 2 is a diagram illustrating the relationship between the creep rupture strength at 650 ° C. for 10,000 hours and the (B / A I) ratio of the inventive alloy and the comparative alloy.
- FIG. 3 is a diagram illustrating the relationship between the B content and the creep rupture strength of the invention alloy and the comparative alloy for 10,000 hours at 650 ° C.
- FIG. 4 is a diagram illustrating the relationship between the drawing ratio and the (BZA I) ratio of the invention alloy and the comparative alloy during creep rupture at 650 ° C. for 10,000 hours.
- FIG. 4 is a diagram illustrating the relationship between the drawing ratio and the B amount at the time of cutting, the best mode for carrying out the invention
- the martensitic heat-resistant alloy according to the first invention of the present application has (A) a composition of C ′,
- the balance is Fe and unavoidable impurities
- the effect of B can be fully exhibited by reducing the N content to a very small amount and containing a large amount of B as compared with known heat-resistant alloys Has been considered to be.
- N and including a large amount of B the disappearance of B as BN precipitates is prevented, the precipitates are refined by B, the grain boundaries are stabilized, and the long-term cleave strength of the alloy at high temperatures is drastically reduced. Will be improved.
- M0 and W are contained in the alloy as a solid solution / precipitation strengthening element, even if the N content is small, B is added in excess, so that Mo and W are solidified. It is known that the solution strengthening mechanism is lost.
- the inventors of the present application have reported that the cause of the disappearance of the solid solution-precipitation strengthening mechanism of M 0 and W is due to Fe (M 0, W) 2 B 2 type boride (,) ⁇ 03 card number (Presumed to be a subspecies of 210437).
- This boride has an extremely stable melting point of 2000 ° C or higher and cannot be eliminated by heat treatment or the like.
- the present invention proposes a method for solving the problem of boride precipitation, which does not require any expensive elements or special production technology, and uses a conventional component system as an extension of the conventional technology.
- a conventional component system as an extension of the conventional technology.
- the martensitic heat-resistant alloy of the invention of the present application can reduce the content of N in the alloy so that it contains a large amount of B so that the effect of B can be fully exerted.
- the optimum composition balance is further limited and presented by the formulas (1) and (2) of (B). It is.
- the composition of the martensitic heat-resistant alloy of the invention of this application will be described in detail below.
- the content of C is set to 0.03 to 0.15%.
- C is an austenite stabilizing element that stabilizes the martensite structure and also forms a carbide to contribute to higher strength. Therefore, if the content is less than 0.03%, the precipitation of carbides is so small that sufficient strength cannot be obtained. 0.15% Exceeding the limit significantly hardens the alloy and sharply reduces weldability and workability. More preferably, the content of C is preferably set to 0.05 to 0.12%.
- the content of Si is set to 0.01 to 0.9%.
- Si is an important element for ensuring oxidation resistance, and also functions as a deoxidizing agent. If the content is less than 0.01%, sufficient oxidation resistance cannot be obtained.If the content exceeds 0.9%, the toughness is reduced, and in addition, the coarsening of precipitates is promoted to increase the cleave rupture strength. It will be significantly reduced. More preferably, the content of Si is preferably 0.2 to P. 6%.
- the content of ⁇ is in the range of 0.01 to 1.5%.
- Mn is an important element as a deoxidizing agent that supplements AI, and from the viewpoint of maintaining strength, is not less than 0.01%. is necessary. However, if it exceeds 1.5%, the creep rupture strength will be impaired. More preferably, the content of ( ⁇ 11 is preferably from 0.3 to 0.7%.
- the Cr content is 8.0-13.0%.
- Cr is an element indispensable for ensuring oxidation resistance, and forms carbides to contribute to higher strength. If the content is less than 8.0%, sufficient oxidation resistance cannot be obtained, and if the content exceeds 13.0%, the precipitation amount of (5) ferrite increases and the strength and toughness are impaired.
- the Cr content is 8.5 to 12.0%, and more preferably, 8.5 to 10.5%.
- the AI content is assumed to be 0.0005 to 0.015%.
- AI is an important element as a deoxidizing agent, and it is necessary to contain at least 0.0005%. However, if it exceeds 0.0015%, the creep rupture strength is significantly reduced. More preferably, the content of AI is preferably 0.0005 to 0.01%.
- the content of Mo is set to 2.0% or less. Mo is a solid solution strengthening element and forms carbides to contribute to strength enhancement. However, if it exceeds 2.0%, precipitation of intermetallic compounds is promoted, and strength and toughness are impaired.
- the content of 1 ⁇ 0 is 0.001 to 0.05%.
- the content of W is set to 4.0% or less.
- W like Mo, is a solid solution strengthening element and forms carbides to contribute to higher strength. If it exceeds 4.0%, precipitation of intermetallic compounds is promoted, and strength and toughness are significantly impaired. More suitable good gamma, the content of W is 2.5 to 3.5% and to Rukoto are preferred.
- V is set to 0.05 to 0.5%.
- V is a solid solution strengthening element and forms fine carbonitrides, contributing to higher strength. If the content is less than 0.05%, carbonitride precipitation is so small that sufficient strength cannot be obtained. On the other hand, if the content exceeds 0.5%, the toughness is impaired by excess carbonitride. More preferably, the V content is 0.15 to 0.25%.
- Nb is set to 0.01 to 0.2%. Nb forms fine carbonitrides like V and contributes to high strength, so it is necessary to add 0.01% or more of Nb. This effect can be further enhanced by the simultaneous addition of V. However, if it exceeds 0.2%, the toughness and weldability are impaired by excessive carbonitride. More preferably, the content of Nb is 0
- the content of Co is 0.1 to 5.0%. Co must be added in an amount of 0.1% or more in order to suppress the generation of ⁇ ferrite and stabilize the martensite structure. If it exceeds 5%, the creep rupture strength will be reduced, or the cost will be reduced because it is an expensive element.
- the content of ⁇ 0 is preferably 0.5 to 3.5%. It is more desirable to be 2.5-3.5%.
- the content of B is characteristic in the invention of this application, and is set to 0.008 to 0.03%.
- B finely disperses precipitates to suppress coarsening and stabilizes grain boundaries.
- the N content is reduced. Therefore, by adding 0.008% or more, the creep strength is dramatically improved. However, if it exceeds 0.03%, the toughness, workability and weldability will be significantly impaired by excessive boride. More preferably, the content of B is preferably set to 0.008 to 0.015%.
- the N content is also characteristic of the invention of this application, and is less than 0.005%.
- N is a solid solution strengthening element and forms carbonitride and contributes to strengthening.
- B is added as in the alloy of the present invention
- 0.005% Exceeding the BN promotes the formation of BN, not only eliminating the effects of B and N, but also significantly impairing the weldability and workability.
- the N content is preferably 0.0005 to 0.0004%.
- Equation (1) is a relational expression showing the balance between the B and N contents in terms of B equivalent. By satisfying this equation, more excellent cleave characteristics can be obtained.
- the coefficient 0.772 on the left side is the atomic ratio of B to N (10.82 / 14.01).
- the amount of water and the amount of water are specified so that the amount of water, which is converted to B equivalent and 0.007% or more of N, is secured.
- the right side in the formula (1) that is, the weight (% by weight) contributing to the enhancement of the creep rupture strength is preferably from 0.007 to 0.02, and more preferably from 0.007 to 0.015. Is preferred.
- Equation (2) is a relational expression showing the balance of the contents of W, ⁇ 0 and ⁇ converted to W equivalent, and the coefficients 1.9 16 and 16.99 9 on the left side are respectively The atomic weight ratios of W and ⁇ 0 and W and ⁇ ( ⁇ 83.86 / 95, .95, 183.86 / 10.82, respectively).
- Equation (2) can be used. By satisfying it, the mechanism of solid solution and precipitation strengthening of W and M 0 is left.
- the amount of W, the amount of Mo, and the amount of B are specified so that W and M 0 that are converted to W equivalent and are 2.0% or more than B are secured.
- the right-hand side in the formula (2), that is, the W and M0 amounts (% by weight) contributing to solid solution and precipitation strengthening are preferably 2.0 to 4.0, and more preferably 2.5 to 3.0. It is preferably 5.
- the martensitic heat-resistant alloy provided by the second invention of this application is (A) the composition range is the same as the alloy of the above-mentioned second invention, but (B) the content of B and AI is (BZA I) is set to 2.5 or more. According to this, too, the creep rupture strength and ductility at high temperatures can be significantly increased.
- the atomic ratio (B / A I) is preferably from 2.5 to 2′0, more preferably from 5.0 to 15.
- the martensitic heat-resistant alloy provided by the invention of the present application satisfies the conditions presented in the first and second inventions, that is, (A) the composition range of the first and second inventions Same as the alloy of the invention (B)
- the content of Mo, W, B and N satisfies the above formulas (1) and (2) in weight%
- the content of B and AI is (BZA I) in atomic ratio.
- the martensitic heat-resistant alloy of the invention of the present application may contain, in terms of% by weight, one or two of Ni: 0.1% or less, and 11: 0.1% or less. It is considered that P: 0.03% or less, S: 0.01% or less and 0: 0.02% or less by weight%.
- Ni and Cu are both austenite stabilizing elements, and if it is desired to suppress the formation of ⁇ ferrite and obtain an effect of further improving toughness, one of these may be used as necessary. Or two can be added. However, if any of the elements exceeds 0.1%, the creep rupture strength is reduced.
- the contents of Ni and Cu are preferably Ni: 0.0005 to 0.05% and Cu: 0.0005 to 0.01%, respectively, and more preferably, Ni: 0.001 to 0.001%. 0.02%, Cu: 0.0005 to 0.0007%, more preferably.
- P, S, 0 are all unavoidable impurities, and the lower the content, the better, but exceeding P: 0.03%, S: 0.01% and 0: 0.02%, respectively Then, it is not preferable because various properties of the alloy of the present invention are impaired.
- the content of these elements is as follows: P: 0.001 to 0.03%, S: 0.000 ⁇ ! 00.01%, 0: 0.0001 to 0.02%, but more preferably P: 0.0001 to 0.005%, S: 0.001 00.001%, 0: 0.001 to 0.005%.
- the invention of this application is a new martensitic heat-resistant alloy that has never been known before, at 65 ° C.
- An object of the present invention is to provide a heat-resistant alloy having a high-temperature creep strength property of a creep life of at least 800 hours at 100 MPa and a creep life of at least 2000 hours under the same conditions.
- a heat-resistant alloy having creep strength characteristics of a creep rupture strength of 650 ° C. and ⁇ 0000 hours or more of 80 MPa is provided by the invention of this application.
- the method for producing a martensitic heat-resistant alloy provided by the invention of the present application is a method for producing a martensite-based heat-resistant alloy of the invention of the present application. After the heating and holding in the temperature range of 1200 ° C, normalizing is performed by air cooling, and then tempering in the temperature range of 75 to 850 ° C is performed by cooling after heating and holding.
- the normalizing temperature is set to a temperature range of 150 ° C. to 120 ° C. If the temperature is lower than 150 ° C, the carbonitride cannot be sufficiently dissolved to form a fine carbonitride dispersed structure after tempering. This is because the amount of precipitation of ferrite increases and the strength and toughness are impaired. If the normalization heating time is less than 5 minutes, the normalization effect will be insufficient, so it should be 15 minutes or more.
- the tempering temperature is set to a temperature range of 750 to 850 ° C. If the temperature is lower than 750 ° C, the excessive dislocations will not be sufficiently recovered, and the creep rupture strength on the long-term side will decrease significantly. If the temperature exceeds 850 ° C, the reverse to austenite will occur. This is because the transformation also significantly reduces the cleave rupture strength. If the heating holding time in the tempering is less than 15 minutes, the effect of the tempering is insufficient, so the time is 15 minutes or more. Since the martensitic heat-resistant alloy of the invention of this application does not require a special manufacturing technique, the economy in production is the same as before.
- Table 1 exemplifies the chemical composition (% by weight) of the alloy of the present invention and the comparative alloy.
- the alloy of the present invention was less likely to generate oxide scale during hot working, was excellent in oxidation resistance, and was also excellent in hot workability.
- Table 2 shows the comparative alloy and the alloy of the present invention. And the values obtained by the formulas (1) and (2) and the (B / AI) atomic ratio in the conventional 9Cr steel.
- the creep rupture time of the alloy of the invention of this application was 4 times to 30 times or more that of the conventional alloy, as compared with the range of rupture time ⁇ 0000 hours or more.
- Comparative alloy 1 with reduced N without B added has relatively high creep strength on the short time side, but the same strength level as the conventional alloy without reduced N in the range of 500 hours or more.
- Comparative alloy 2 containing 0.0047% B has higher strength than the conventional alloy, but it is said to be a characteristic of the conventional ferrite heat-resistant alloy at 65 ° C for a long time. A sharp decrease in the cleave rupture strength in the region was observed.
- a novel martensitic heat-resistant alloy which has not been realized so far, a high-temperature alloy having a cleave life of 3800 hours or more at 650 ° C and a stress of MP00 MPa is used.
- a heat-resistant alloy having a cleaving strength characteristic a heat-resistant alloy having a high-temperature cleaving strength characteristic of 20,000 hours or more at 650 ° C and a stress of 100 MPa is provided.
- FIG. 2 is a diagram showing the relationship between the creep rupture strength at 650 ° C. and 10,000 hours obtained from FIG. 1 and the (B / A I) atomic ratio. As is evident from Fig. 2, the strength is remarkably improved when the (B / A I) ratio is 2.5 or more, and is slightly improved when the (B / A I) ratio is more than 2.5.
- FIG. 3 is a diagram showing the relationship between the creep rupture strength at 650 ° C. and 10,000 hours obtained from FIG. 1 and the B content. As is clear from FIG. 3, the creep rupture strength increases linearly with the B content, and the higher the (BZA I) ratio is 11 or higher than that of 3.3 or lower, the higher the strength.
- FIG. 4 is a diagram showing the relationship between the drawing ratio and the (B / NO) atomic ratio at 10,000 hours from the breaking times and the drawing ratios shown in Table 3 to determine the drawing ratio.
- the drawing ratio shows the highest value when the (BZA I) atomic ratio is 2.5 to 12.5.
- FIG. 5 is a diagram showing the relationship between the aperture ratio and the B amount in FIG. The squeezing rate increases significantly with the B content, especially at 50 ppm and above.
- the reduction ratio of Comparative Alloy 1 rapidly decreased after 1000 hours or more, and that of Comparative Alloy 2 was 10000. While the reduction ratio sharply decreases over time, the alloy of the invention of the present application decreases slightly with time even in 1000 hours, but 75% in 100 hours. It has a high drawing ratio as described above.
- the fact that a high drawing ratio can be obtained over a longer period of time means that there is less embrittlement in the use as a tube, and the occurrence of cracks can be prevented. This is a remarkable effect.
- a martensitic heat-resistant alloy having high creep rupture strength over a long period of time at high temperature, and having excellent hot workability and ductility in addition to oxidation resistance, Manufacturing methods are provided.
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/240,176 US7128791B2 (en) | 2001-01-31 | 2002-01-30 | Heat-resistant martensite alloy excellent in high-temperature creep rupture strength and ductility and process for producing the same |
EP02711262A EP1275744B1 (en) | 2001-01-31 | 2002-01-31 | Heat-resistant martensite alloy excellent in high-temperature creep rapture strength and ductility and process for producing the same |
DE60230564T DE60230564D1 (de) | 2001-01-31 | 2002-01-31 | Hitzebeständige martensitische legierungmit ausgezeichneter dauerstandsfestigkeit und duktilität und herstellungsverfahren dafür |
DK02711262T DK1275744T3 (da) | 2001-01-31 | 2002-01-31 | Varmebestandig, martensitisk legering med fremragende krybebrudstyrke og duktilitet ved h j temperatur samt fremgangsmode til fremstilling af samme |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2001-23635 | 2001-01-31 | ||
JP2001023635A JP4614547B2 (ja) | 2001-01-31 | 2001-01-31 | 高温クリープ破断強度及び延性に優れたマルテンサイト系耐熱合金とその製造方法 |
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WO2002061162A1 true WO2002061162A1 (fr) | 2002-08-08 |
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PCT/JP2002/000776 WO2002061162A1 (fr) | 2001-01-31 | 2002-01-31 | Alliage de martensite refractaire possedant une excellente resistance a la rupture en fluage a haute temperature et une excellente endurance et procede de production de ce dernier |
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US (1) | US7128791B2 (ja) |
EP (1) | EP1275744B1 (ja) |
JP (1) | JP4614547B2 (ja) |
DE (1) | DE60230564D1 (ja) |
DK (1) | DK1275744T3 (ja) |
WO (1) | WO2002061162A1 (ja) |
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CN109943783A (zh) * | 2017-12-20 | 2019-06-28 | 上海电气电站设备有限公司 | 一种汽轮机高温铸件材料 |
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JP4188124B2 (ja) * | 2003-03-31 | 2008-11-26 | 独立行政法人物質・材料研究機構 | 焼き戻しマルテンサイト系耐熱鋼の溶接継手 |
JP2005076062A (ja) * | 2003-08-29 | 2005-03-24 | National Institute For Materials Science | 高温ボルト材 |
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JP2007162114A (ja) * | 2005-12-16 | 2007-06-28 | Sumitomo Metal Ind Ltd | マルテンサイト系鉄基耐熱合金 |
JP4664857B2 (ja) * | 2006-04-28 | 2011-04-06 | 株式会社東芝 | 蒸気タービン |
US20080099176A1 (en) * | 2006-10-26 | 2008-05-01 | Husky Injection Molding Systems Ltd. | Component of Metal Molding System |
JP6388276B2 (ja) * | 2013-05-22 | 2018-09-12 | 新日鐵住金株式会社 | 耐熱鋼及びその製造方法 |
RU2558738C1 (ru) * | 2014-06-03 | 2015-08-10 | Федеральное государственное автономное образовательное учреждение высшего профессионального образования "Белгородский государственный национальный исследовательский университет" (НИУ "БелГУ") | Жаропрочная сталь мартенситного класса |
JP6399509B2 (ja) * | 2014-07-02 | 2018-10-03 | 新日鐵住金株式会社 | 高強度フェライト系耐熱鋼構造体およびその製造方法 |
ES2846875T3 (es) * | 2016-07-12 | 2021-07-30 | Vallourec Tubes France | Tubo o tubería de acero sin costura martensítico con alto contenido de cromo resistente al calor con una combinación de alta resistencia a la rotura por fluencia y resistencia a la oxidación |
US20220235445A1 (en) * | 2019-03-19 | 2022-07-28 | Nippon Steel Corporation | Ferritic heat-resistant steel |
EP3719163A1 (de) * | 2019-04-02 | 2020-10-07 | Siemens Aktiengesellschaft | Befestigungsmittel für ein turbinen- oder ventilgehäuse |
CN112797398A (zh) * | 2020-12-31 | 2021-05-14 | 大唐郓城发电有限公司 | 一种超超临界二次再热机组锅炉调温系统 |
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EP0887431A1 (en) * | 1997-06-25 | 1998-12-30 | Mitsubishi Heavy Industries, Ltd. | Heat-resisting steel |
JPH11350031A (ja) * | 1998-06-11 | 1999-12-21 | Nippon Steel Corp | 低温靭性とクリープ強度に優れた高Cr耐熱鋼の製造方法 |
JP2000204434A (ja) * | 1999-01-13 | 2000-07-25 | Sumitomo Metal Ind Ltd | 高温強度に優れたフェライト系耐熱鋼およびその製造方法 |
EP1103626A1 (en) * | 1998-07-08 | 2001-05-30 | Sumitomo Metal Industries Limited | HIGH Cr FERRITIC HEAT RESISTANCE STEEL |
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JP3315800B2 (ja) * | 1994-02-22 | 2002-08-19 | 株式会社日立製作所 | 蒸気タービン発電プラント及び蒸気タービン |
JPH09296258A (ja) * | 1996-05-07 | 1997-11-18 | Hitachi Ltd | 耐熱鋼及び蒸気タービン用ロータシャフト |
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- 2001-01-31 JP JP2001023635A patent/JP4614547B2/ja not_active Expired - Fee Related
-
2002
- 2002-01-30 US US10/240,176 patent/US7128791B2/en not_active Expired - Lifetime
- 2002-01-31 EP EP02711262A patent/EP1275744B1/en not_active Expired - Lifetime
- 2002-01-31 DK DK02711262T patent/DK1275744T3/da active
- 2002-01-31 DE DE60230564T patent/DE60230564D1/de not_active Expired - Lifetime
- 2002-01-31 WO PCT/JP2002/000776 patent/WO2002061162A1/ja active Application Filing
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JPH04173926A (ja) * | 1990-11-05 | 1992-06-22 | Nisshin Steel Co Ltd | マルテンサイト系ステンレス鋼帯に疲労特性を付与する方法 |
EP0887431A1 (en) * | 1997-06-25 | 1998-12-30 | Mitsubishi Heavy Industries, Ltd. | Heat-resisting steel |
JPH11350031A (ja) * | 1998-06-11 | 1999-12-21 | Nippon Steel Corp | 低温靭性とクリープ強度に優れた高Cr耐熱鋼の製造方法 |
EP1103626A1 (en) * | 1998-07-08 | 2001-05-30 | Sumitomo Metal Industries Limited | HIGH Cr FERRITIC HEAT RESISTANCE STEEL |
JP2000204434A (ja) * | 1999-01-13 | 2000-07-25 | Sumitomo Metal Ind Ltd | 高温強度に優れたフェライト系耐熱鋼およびその製造方法 |
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109943783A (zh) * | 2017-12-20 | 2019-06-28 | 上海电气电站设备有限公司 | 一种汽轮机高温铸件材料 |
CN109112424A (zh) * | 2018-10-26 | 2019-01-01 | 上海电气电站设备有限公司 | 一种汽轮机用耐热钢 |
CN109112424B (zh) * | 2018-10-26 | 2023-12-19 | 上海电气电站设备有限公司 | 一种汽轮机用耐热钢 |
Also Published As
Publication number | Publication date |
---|---|
JP4614547B2 (ja) | 2011-01-19 |
US7128791B2 (en) | 2006-10-31 |
DE60230564D1 (de) | 2009-02-12 |
US20040057862A1 (en) | 2004-03-25 |
EP1275744A1 (en) | 2003-01-15 |
JP2002226946A (ja) | 2002-08-14 |
EP1275744A4 (en) | 2006-05-24 |
EP1275744B1 (en) | 2008-12-31 |
DK1275744T3 (da) | 2009-04-27 |
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