CN101343717B - Martensite heat-resistant steel - Google Patents
Martensite heat-resistant steel Download PDFInfo
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- CN101343717B CN101343717B CN2008101189227A CN200810118922A CN101343717B CN 101343717 B CN101343717 B CN 101343717B CN 2008101189227 A CN2008101189227 A CN 2008101189227A CN 200810118922 A CN200810118922 A CN 200810118922A CN 101343717 B CN101343717 B CN 101343717B
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Abstract
The invention relates to a Martensite heat-resistant steel, which belongs to the heat-resistant steel manufacturing field. The Martensite heat-resistant steel comprises the following chemical compositions: 15.0 to 16.5 percent of Cr, 2.0 to 2.5 percent of Ni, 0.90 to 1.30 percent of Mo, 0.06 to 0.10 percent of N, 0.05 to 0.20 percent of V, 0.12 to 0.18 percent of C, 0.6 percent or less than 0.6 percent of Si, 0.6 percent or less than 0.6 percent of Mn, 0.02 percent or less than 0.02 percent of S, 0.03 percent or less than 0.03 percent of P and 0.1 percent or less than 0.1 percent of S, balance Fe. The invention has the advantages that only a small amount of micro-alloying element V is added, the cost increase is small, the intensity and plasticity after high temperature tempering are obviously enhanced, and the high temperature mechanical property at the temperature of 550 DEG C is also obviously increased.
Description
Technical field
The invention belongs to the manufacturing field of high temperature steel, a kind of martensite high temperature steel particularly is provided, the blade material of preparation work in high-temperature fuel gas or steam corrosion environment.
Background technology
In the prior art, be operated in the blade material in high-temperature fuel gas or the steam corrosion environment, the difference by use temperature mainly contains martensite high temperature steel, austenitic heat-resistance steel and superalloy.Martensite high temperature steel mainly uses under temperature is no more than 600 ℃ operating mode, according to different corrosive environments, mainly uses 12%Cr type, two kinds of martensite high temperature steel of 17%Cr type.17%Cr type martensite high temperature steel mainly uses in the environment that solidity to corrosion is had relatively high expectations, the main trade mark the earliest has 1Cr17Ni2,1Cr17Ni3, but because the strengthening element of other except that Cr not, the mechanical property behind the high tempering is lower, and its part use temperature is no more than 450 ℃ usually.For improving the performance behind its high tempering, add Mo, N, developed the 1Cr16Ni2MoN steel grade, the mechanical property of this steel behind 550～590 ℃ of average temperings is higher, now has been widely used as the blade material in internal combustion turbine.The final heat treated tempering temperature of blade is usually above 50～100 ℃ of its use temperatures, though 1Cr16Ni2MoN high temperature steel has good high temperature resistant combustion gas or steam corrosion performance 600 ℃ of following temperature, but because the mechanical property of this steel grade behind 640～660 ℃ of high temperings is lower, limited its use temperature scope, only be used to make working temperature at the blade that uses below 500 ℃.In the prior art, the reinforcement of steel mainly is Cr
23C
6Precipitation strength and the solution strengthening of Mo, N is an austenite former, mainly plays the solution strengthening effect, when N is controlled at lower limit, mechanical property behind 640～660 ℃ of high temperings is higher, but the delta ferrite level of this moment increases, serious harm fatigue property.
Summary of the invention
The object of the present invention is to provide a kind of martensite high temperature steel, by the strengthened nano precipitated phase of 1Cr16Ni2MoN high temperature steel being realized significantly improving mechanical property behind the high tempering, obtain a kind of novel martensite high temperature steel, its chemical ingredients is shown in Table 1.
Table 1 novel martensite high temperature steel chemical ingredients/wt%
| C | Si | Mn | S | P | Cr | Ni | Mo | N | V | Surplus |
| 0.12 ～0.18 | ≤0.6 | ≤0.6 | ≤0.02 | ≤0.03 | 15.0 ～16.5 | 2.0 ～2.5 | 0.90 ～1.30 | 0.06 ～0.10 | 0.05 ～0.20 | Fe |
Adopt on the basis of 1Cr16Ni2MoN high temperature steel according to above-mentioned purpose the present invention, add 0.05～0.2%V, for eliminating delta ferrite, the lower bound of N content is improved 0.06% from 0.03%, realize significantly improving the purpose of mechanical property behind the high tempering, the use temperature of blade can have been brought up to 550 ℃.
The technological principle of foregoing invention technical scheme is the nitrogen that utilizes in the former technology, interpolation can form the alloying element V of nanometer precipitated phase, nanophase VN or V (CN) are separated out in disperse in thermal treatment high tempering process, have improved intensity, plasticity simultaneously, have significantly improved comprehensive mechanical property.V content can not be too many, otherwise the easy gathering that nanophase takes place is grown up in the long-time running process, loses strengthening effect.
According to above-mentioned purpose and technological principle technical scheme of the present invention be: on the basis of 1Cr16Ni2MoN high temperature steel chemical ingredients, add 0.05～0.20%V, under identical thermal treatment process, the mechanical property of new steel grade behind high tempering can significantly improve.
The present invention compared with prior art, only added a small amount of micro alloying element V, cost improves seldom, but the intensity behind the high tempering, plasticity all can significantly improve, mechanical behavior under high temperature also significantly increases, its mechanical behavior under high temperature of 550 ℃ is suitable with 500 ℃ of mechanicals behavior under high temperature of contrast grade of steel, so the use temperature of part can be brought up to 550 ℃.
Embodiment
Embodiment 1:
The test material is selected for use on the basis of 1Cr16Ni2MoN high temperature steel chemical ingredients standard, adds 0.05～0.20%V, adopts chemical ingredients to see Table 2, and experiment material other composition except that V is all same as the prior art.Embodiment 1 sees Table 3 with the room-temperature mechanical property contrast table of prior art.Sequence number 2-5 is the embodiment of the invention 1 in the above-mentioned tabulation, and sequence number 1 is the steel grade of prior art.
Table 2 is used chemical ingredients for the embodiment of the invention 1
| Sequence number | C | Si | Mn | S | P | Cr | Ni | Mo | N | V |
| 1 | 0.18 | 0.056 | 0.49 | 0.004 | 0.0054 | 15.30 | 2.11 | 1.20 | 0.066 | |
| 2 | 0.14 | 0.37 | 0.53 | 0.006 | 0.0098 | 15.42 | 2.33 | 1.12 | 0.098 | 0.05 |
| 3 | 0.14 | 0.054 | 0.51 | 0.007 | 0.010 | 15.18 | 2.35 | 1.14 | 0.097 | 0.11 |
| 4 | 0.12 | 0.34 | 0.52 | 0.007 | 0.010 | 15.19 | 2.34 | 1.14 | 0.097 | 0.16 |
| 5 | 0.16 | 0.054 | 0.53 | 0.007 | 0.010 | 15.37 | 2.56 | 1.28 | 0.081 | 0.20 |
The room-temperature mechanical property contrast table of table 3 embodiment of the invention 1 and prior art
Embodiment 2:
Test material is identical with embodiment 1, sees Table 4 with the mechanical behavior under high temperature contrast table of prior art.Sequence number 2-5 is the embodiment of the invention 2 in the above-mentioned tabulation, and sequence number 1 is the steel grade of prior art.550 ℃ of hot strengths of the present invention are higher than 500 ℃ hot strength of former technology, and mechanical behavior under high temperature has obtained significant raising.
The room-temperature mechanical property contrast table of table 4 embodiment of the invention 1 and prior art
Claims (1)
1. a martensite high temperature steel is characterized in that, the weight percentage of chemical ingredients is: Cr:15.0%～16.5%, Ni:2.0%～2.5%, Mo:0.90%～1.30%, N:0.06%～0.10%, V:0.05%～0.20%, C:0.12%～0.18%, Si≤0.6%, Mn≤0.6%, S :≤0.02%, P≤0.03%, surplus are Fe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101189227A CN101343717B (en) | 2008-08-26 | 2008-08-26 | Martensite heat-resistant steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101189227A CN101343717B (en) | 2008-08-26 | 2008-08-26 | Martensite heat-resistant steel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101343717A CN101343717A (en) | 2009-01-14 |
| CN101343717B true CN101343717B (en) | 2010-06-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2008101189227A Expired - Fee Related CN101343717B (en) | 2008-08-26 | 2008-08-26 | Martensite heat-resistant steel |
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| CN (1) | CN101343717B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102864379B (en) * | 2012-10-08 | 2014-07-02 | 北京科技大学 | Fe-Cr-Co-W-Mo martensitic heat resistant steel and method for manufacturing same |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN88100065A (en) * | 1987-01-09 | 1988-10-05 | 株式会社日立制作所 | Heat-resistant steel and gas turbine made of the same |
| EP1728886A1 (en) * | 1999-07-09 | 2006-12-06 | Hitachi, Ltd. | Steam turbine blade, and steam turbine and steam turbine power plant using the same |
-
2008
- 2008-08-26 CN CN2008101189227A patent/CN101343717B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN88100065A (en) * | 1987-01-09 | 1988-10-05 | 株式会社日立制作所 | Heat-resistant steel and gas turbine made of the same |
| EP1728886A1 (en) * | 1999-07-09 | 2006-12-06 | Hitachi, Ltd. | Steam turbine blade, and steam turbine and steam turbine power plant using the same |
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| CN101343717A (en) | 2009-01-14 |
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Assignee: Advanced Steel Technology Co., Ltd. Assignor: Central Iron & Steel Research Institute Contract record no.: 2011990000830 Denomination of invention: Counting method of delta ferritic phase area content in Martensite heat resistant steel Granted publication date: 20100602 License type: Exclusive License Open date: 20090114 Record date: 20110829 |
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