CN108085615A - A kind of application of heat resisting steel in 630 degree of steam turbine main inlet throttle-stop valves and cylinder - Google Patents
A kind of application of heat resisting steel in 630 degree of steam turbine main inlet throttle-stop valves and cylinder Download PDFInfo
- Publication number
- CN108085615A CN108085615A CN201611044811.7A CN201611044811A CN108085615A CN 108085615 A CN108085615 A CN 108085615A CN 201611044811 A CN201611044811 A CN 201611044811A CN 108085615 A CN108085615 A CN 108085615A
- Authority
- CN
- China
- Prior art keywords
- heat resisting
- resisting steel
- main inlet
- steam turbine
- inlet throttle
- 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.)
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Classifications
-
- 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
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/54—Ferrous alloys, e.g. steel alloys containing chromium with nickel with boron
-
- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
-
- 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
-
- 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
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
-
- 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
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
-
- 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
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/48—Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
-
- 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
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/52—Ferrous alloys, e.g. steel alloys containing chromium with nickel with cobalt
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D17/00—Regulating or controlling by varying flow
- F01D17/10—Final actuators
Abstract
The present invention provides a kind of application of heat resisting steel in 630 degree of steam turbine main inlet throttle-stop valves and cylinder, the heat resisting steel contains C 0.08% ~ 0.16% in terms of quality %, Mn 0.60% ~ 1.20%, Cr 8.50% ~ 10.00%, Mo 1.20% ~ 1.80%, Ni 0.10% ~ 0.40%, Co 0.70% ~ 1.30%, V 0.10% ~ 0.30%, N 0.010% ~ 0.030%, Nb 0.02%~0.08%, B 0.006%~0.022%；Surplus is iron and impurity.Heat resisting steel has the characteristic of resistance to 630 DEG C of high temperature in the present invention；Meanwhile the heat resisting steel is applied in the main inlet throttle-stop valve and cylinder of steam turbine by the present invention, so that the high-temperature and durable of main inlet throttle-stop valve and cylinder is stronger in the present invention, and the characteristic with resistance to 630 DEG C of high temperature.
Description
Technical field
The present invention relates to a kind of application of heat resisting steel, more particularly to a kind of heat resisting steel in 630 degree of steam turbine main inlet throttle-stop valves and
Application in cylinder.
Background technology
With the requirement of energy-saving and emission-reduction, China's energy resource structure is carrying out the adjustment of depth.And with thermal power generation city
Following development trend in field, it is desirable that steam turbine constantly develops to high parameter, high efficiency.Therefore, it is necessary to improve steam turbine main inlet throttle-stop valve
Vapor (steam) temperature and pressure.Between in the past few decades, the vapor (steam) temperature of main inlet throttle-stop valve is continuously improved from 538 DEG C, 566 DEG C to 600
DEG C, even 620 DEG C.The material of main inlet throttle-stop valve also develops to heat resisting steel from steel alloy, but heat resisting steel not yet occurs in 630 DEG C of steamers
Application in owner's porthole.
The content of the invention
In view of the foregoing deficiencies of prior art, it is an object of the invention to provide a kind of heat resisting steel in 630 degree of steamers
Application in owner's porthole, for solving the problems, such as that the high temperature endurance performance of the main inlet throttle-stop valve of steam turbine in the prior art is insufficient.
To achieve the above object, the present invention provides a kind of application of heat resisting steel in 630 degree of steam turbine main inlet throttle-stop valves, described resistance to
Hot steel contains C 0.08%~0.16%, Mn 0.60%~1.20%, Cr 8.50%~10.00%, Mo in terms of quality %
1.20%~1.80%, Ni 0.10%~0.40%, Co 0.70%~1.30%, V 0.10%~0.30%, N 0.010%
~0.030%, Nb 0.02%~0.08%, B 0.006%~0.022%；Surplus is iron and impurity.
Further, the heat resisting steel needs to prepare by following manufacturing method：
S1, alkaline circuit smelting is carried out first；
S2 and then progress ladle refining；
S3, finally poured into a mould in atmospheric environment.
Further, need first to carry out vacuum degassing in the step S3.
Further, poured into a mould in the step S3 by sand mold and obtain steam turbine main inlet throttle-stop valve casting.
Further, the manufacturing method further includes：
S4, steam turbine main inlet throttle-stop valve casting is subjected to Tempering and Quenching.
Further, the Tempering and Quenching includes：Carry out 1100~1130 DEG C of quenchings and 730~760 DEG C of tempering twice
Processing.
As described above, the application the present invention relates to heat resisting steel in 630 degree of steam turbine main inlet throttle-stop valves, has below beneficial to effect
Fruit：
The present invention is with the addition of Elements C o and B on the basis of existing heat resisting steel；B element can be prevented effectively in grain boundaries
M23C6Grow up and significantly improve heat resisting steel creep rupture strength；The addition of Co elements can reduce stacking fault energy, simultaneously
Increase the effect of solution strengthening, be conducive to improve the creep rupture strength of heat resisting steel；So that heat resisting steel can be 630 in the present invention
DEG C hot environment in keep its normal intensity, even if in the present invention heat resisting steel have resistance to 630 DEG C of high temperature characteristic；Meanwhile
The heat resisting steel is applied in the main inlet throttle-stop valve of steam turbine by the present invention, so that the high-temperature and durable of main inlet throttle-stop valve is stronger in the present invention,
And the characteristic with resistance to 630 DEG C of high temperature.
It is another object of the present invention to provide a kind of application of heat resisting steel in 630 degree of steam turbines, for solving
The problem of certainly high temperature endurance performance of the cylinder of steam turbine is insufficient in the prior art.
To achieve the above object, the application the present invention also provides a kind of heat resisting steel in 630 degree of steam turbines, it is described resistance to
Hot steel contains C 0.08%~0.16%, Mn 0.60%~1.20%, Cr 8.50%~10.00%, Mo in terms of quality %
1.20%~1.80%, Ni 0.10%~0.40%, Co 0.70%~1.30%, V 0.10%~0.30%, N 0.010%
~0.030%, Nb 0.02%~0.08%, B 0.006%~0.022%；Surplus is iron and impurity.
Further, the heat resisting steel needs to prepare by following manufacturing method：
S10, alkaline circuit smelting is carried out first；
S20 and then progress ladle refining；
S30, finally poured into a mould in atmospheric environment.
Further, need first to carry out vacuum degassing in the step S30.
Further, poured into a mould in the step S30 by sand mold and obtain steam turbine casting.
As described above, the application the present invention relates to heat resisting steel in 630 degree of steam turbines, has the advantages that：
The present invention is with the addition of Elements C o and B on the basis of existing heat resisting steel；B element can be prevented effectively in grain boundaries
M23C6Grow up and significantly improve heat resisting steel creep rupture strength；The addition of Co elements can reduce stacking fault energy, simultaneously
Increase the effect of solution strengthening, be conducive to improve the creep rupture strength of heat resisting steel；So that heat resisting steel can be 630 in the present invention
DEG C hot environment in keep its normal intensity, even if in the present invention heat resisting steel have resistance to 630 DEG C of high temperature characteristic；Meanwhile
The heat resisting steel is applied in the cylinder of steam turbine by the present invention, so that the high-temperature and durable of cylinder is stronger in the present invention, and is had
There is the characteristic of resistance to 630 DEG C of high temperature.
Description of the drawings
Fig. 1 is the structure diagram of main inlet throttle-stop valve in the present invention.
Fig. 2 is the heat treatment process schematic diagram of main inlet throttle-stop valve casting and cylinder casting in the present invention.
Fig. 3 is the high temperature endurance performance schematic diagram of main inlet throttle-stop valve casting and cylinder casting in the present invention.
Component label instructions
1 main inlet throttle-stop valve
Specific embodiment
Embodiments of the present invention are illustrated by particular specific embodiment below, those skilled in the art can be by this explanation
Content disclosed by book understands other advantages and effect of the present invention easily.
It should be clear that structure, ratio, size depicted in this specification institute accompanying drawings etc., only specification to be coordinated to be taken off
The content shown so that those skilled in the art understands and reads, is not limited to the enforceable qualifications of the present invention, therefore
Do not have technical essential meaning, the modification of any structure, the change of proportionate relationship or the adjustment of size are not influencing the present invention
Under the effect of can be generated and the purpose that can reach, it should all still fall and obtain the model that can cover in disclosed technology contents
In enclosing.Meanwhile cited such as " on ", " under " in this specification, "left", "right", the term of " centre " and " one ", also it is only
Convenient for the clear of narration rather than to limit the enforceable scope of the present invention, relativeness is altered or modified, in no essence
It changes under technology contents, when being also considered as the enforceable scope of the present invention.
The present invention provides a kind of application of heat resisting steel in 630 degree of steam turbine main inlet throttle-stop valves, and the heat resisting steel is in terms of quality %
Contain C0.08%~0.16%, Mn 0.60%~1.20%, Cr 8.50%~10.00%, Mo 1.20%~1.80%, Ni
0.10%~0.40%, Co 0.70%~1.30%, V 0.10%~0.30%, N 0.010%~0.030%, Nb
0.02%~0.08%, B 0.006%~0.022%；Surplus is iron and impurity.The present invention adds on the basis of existing heat resisting steel
Elements C o and B are added；B element can effectively prevent M in grain boundaries23C6Grow up and significantly improve heat resisting steel high temperature
Creep rupture strength；The addition of Co elements can reduce stacking fault energy, while increase the effect of solution strengthening, be conducive to improve heat resisting steel
Creep rupture strength；So that the high-temperature and durable of heat resisting steel is strong in the present invention, and can be kept in 630 DEG C of hot environment
Its normal intensity, i.e., heat resisting steel has the characteristic of resistance to 630 DEG C of high temperature in the present invention；It is meanwhile of the invention by the heat resisting steel application
To the main inlet throttle-stop valve of steam turbine, so that the high-temperature and durable of main inlet throttle-stop valve is stronger in the present invention, as shown in Figure 3, and with resistance to 630 DEG C
The characteristic of high temperature.
In the first embodiment, the concrete content of each chemical composition of heat resisting steel see the table below shown in 1.
Table 1：The chemical composition of main inlet throttle-stop valve casting in embodiment 1 and embodiment 2
And the alloy raw material for being formed each chemical composition shown in table 1 in the first embodiment is as furnace charge, then
It is prepared by following manufacturing method, to obtain corresponding heat resisting steel：
S1, alkaline circuit smelting is carried out first；
S2 and then progress ladle refining；
S3, finally poured into a mould in atmospheric environment.
Meanwhile poured into a mould in the step S3 of the first embodiment by sand mold and obtain steam turbine main inlet throttle-stop valve casting, and pour into a mould
Main inlet throttle-stop valve casting weight about 24t.
In addition, in second of embodiment, the concrete content of each chemical composition of heat resisting steel is shown in Table 1.It is real at second
It applies in example, the alloy raw material for the heat resisting steel that each chemical composition shown in table 1 is formed also passes through above-mentioned as furnace charge
Prepared by manufacturing method, to obtain corresponding heat resisting steel.Meanwhile the steamer owner obtained described in the step S3 of second of embodiment
Porthole casting weight about 26t.
And the manufacturing method in the first above-mentioned embodiment and second of embodiment further includes：
S4, steam turbine main inlet throttle-stop valve casting is subjected to Tempering and Quenching, to obtain main inlet throttle-stop valve 1, as shown in Figure 1.Therefore,
The manufacturing method of heat resisting steel is also the processing method of main inlet throttle-stop valve 1 in a kind of embodiment and second of embodiment.
The present invention is effectively improved the creep rupture strength of main inlet throttle-stop valve, as shown in Figure 3, and is protected by above-mentioned Tempering and Quenching
The operating temperature of main inlet throttle-stop valve reaches 630 DEG C in the card present invention.
As shown in Fig. 2, above-mentioned Tempering and Quenching specifically includes：1100~1130 DEG C are carried out to steam turbine main inlet throttle-stop valve casting to quench
Fire and twice 730~760 DEG C of tempers, to ensure characteristic of the main inlet throttle-stop valve with resistance to 630 DEG C of high temperature in the present invention.
It in addition, in the case of conditions permit, needs first to carry out vacuum degassing in above-mentioned steps S3, to ensure what is subsequently poured into a mould
The quality of steam turbine main inlet throttle-stop valve casting.
Meanwhile the application the present invention also provides a kind of heat resisting steel in 630 degree of steam turbines, the heat resisting steel is with matter
It measures % and counts and contain C 0.08%~0.16%, Mn 0.60%~1.20%, Cr 8.50%~10.00%, Mo 1.20%~
1.80%, Ni 0.10%~0.40%, Co 0.70%~1.30%, V 0.10%~0.30%, N 0.010%~
0.030%, Nb 0.02%~0.08%, B0.006%~0.022%；Surplus is iron and impurity.The present invention is also with above-mentioned
Heat resisting steel has the characteristic of resistance to 630 DEG C of high temperature, and the heat resisting steel is applied in the cylinder of steam turbine, so that vapour in the present invention
The high-temperature and durable of cylinder is stronger, as shown in Figure 3, and with resistance to 630 DEG C of high temperature characteristic, can be in 630 DEG C of hot environment
Normal use.
The heat resisting steel of the third embodiment of the invention also needs to prepare by following manufacturing method：
S10, alkaline circuit smelting is carried out first；
S20 and then progress ladle refining；
S30, finally poured into a mould in atmospheric environment.
And it is poured into a mould in the step S30 of the third embodiment by sand mold and obtains steam turbine casting.Meanwhile the third
The manufacturing method of embodiment further includes：S40, steam turbine casting is subjected to Tempering and Quenching, to obtain cylinder.Therefore,
The manufacturing method of heat resisting steel in three kinds of embodiments is also the processing method of cylinder.In addition, as shown in Fig. 2, in the third implementation
Tempering and Quenching specifically includes in example：1100~1130 DEG C of quenchings and 730~760 DEG C times twice are carried out to steam turbine casting
Fire processing, to ensure characteristic of the cylinder with resistance to 630 DEG C of high temperature in the present invention.
In addition, under conditions permit, need first to carry out vacuum degassing in the step S30 of the third embodiment.
In conclusion the present invention effectively overcomes various shortcoming of the prior art and has high industrial utilization.
The above-described embodiments merely illustrate the principles and effects of the present invention, and is not intended to limit the present invention.It is any ripe
Know the personage of this technology all can carry out modifications and changes under the spirit and scope without prejudice to the present invention to above-described embodiment.Cause
This, those of ordinary skill in the art is complete without departing from disclosed spirit and institute under technological thought such as
Into all equivalent modifications or change, should by the present invention claim be covered.
Claims (10)
1. a kind of application of heat resisting steel in 630 degree of steam turbine main inlet throttle-stop valves, the heat resisting steel contains C 0.08% in terms of quality %
~0.16%, Mn 0.60%~1.20%, Cr 8.50%~10.00%, Mo 1.20%~1.80%, Ni 0.10%~
0.40%, Co 0.70%~1.30%, V 0.10%~0.30%, N 0.010%~0.030%, Nb 0.02%~
0.08%, B 0.006%~0.022%；Surplus is iron and impurity.
2. the application according to right asks 1, the heat resisting steel needs to prepare by following manufacturing method：
S1, alkaline circuit smelting is carried out first；
S2 and then progress ladle refining；
S3, finally poured into a mould in atmospheric environment.
3. application according to claim 2, need first to carry out vacuum degassing in the step S3.
Pass through sand mold cast 4. application according to claim 2, in the step S3 and obtain steam turbine main inlet throttle-stop valve casting.
5. application according to claim 4, the manufacturing method further includes：
S4, steam turbine main inlet throttle-stop valve casting is subjected to Tempering and Quenching.
6. application according to claim 5, the Tempering and Quenching includes：Carry out 1100~1130 DEG C quenching and twice
730~760 DEG C of tempers.
7. a kind of application of heat resisting steel in 630 degree of steam turbines, the heat resisting steel in terms of quality % containing C 0.08%~
0.16%, Mn 0.60%~1.20%, Cr 8.50%~10.00%, Mo 1.20%~1.80%, Ni 0.10%~
0.40%, Co 0.70%~1.30%, V 0.10%~0.30%, N 0.010%~0.030%, Nb 0.02%~
0.08%, B 0.006%~0.022%；Surplus is iron and impurity.
8. the application according to right asks 7, the heat resisting steel needs to prepare by following manufacturing method：
S10, alkaline circuit smelting is carried out first；
S20 and then progress ladle refining；
S30, finally poured into a mould in atmospheric environment.
9. application according to claim 8, need first to carry out vacuum degassing in the step S30.
Pass through sand mold cast 10. application according to claim 8, in the step S30 and obtain steam turbine casting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611044811.7A CN108085615A (en) | 2016-11-22 | 2016-11-22 | A kind of application of heat resisting steel in 630 degree of steam turbine main inlet throttle-stop valves and cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611044811.7A CN108085615A (en) | 2016-11-22 | 2016-11-22 | A kind of application of heat resisting steel in 630 degree of steam turbine main inlet throttle-stop valves and cylinder |
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| Publication Number | Publication Date |
|---|---|
| CN108085615A true CN108085615A (en) | 2018-05-29 |
Family
ID=62170203
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611044811.7A Pending CN108085615A (en) | 2016-11-22 | 2016-11-22 | A kind of application of heat resisting steel in 630 degree of steam turbine main inlet throttle-stop valves and cylinder |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05156350A (en) * | 1991-12-03 | 1993-06-22 | Daido Steel Co Ltd | Manufacture of molding die for heat resistant glass |
| CN1209464A (en) * | 1997-03-25 | 1999-03-03 | 株式会社东芝 | High-toughness thermo-resisting steel, turbine rotor and mfg. method therefor |
| CN102517508A (en) * | 2011-12-30 | 2012-06-27 | 钢铁研究总院 | Ferrite refractory steel for vane of steam turbine of ultra supercritical fossil power plant and manufacturing method |
| CN102517517A (en) * | 2011-12-30 | 2012-06-27 | 山东理工大学 | Refractory steel for vane of steam turbine of ultra supercritical fossil power plant and manufacturing method |
| CN102560275A (en) * | 2010-12-28 | 2012-07-11 | 株式会社东芝 | Heat resistant cast steel, manufacturing method thereof, cast parts of steam turbine, and manufacturing method of cast parts of steam turbine |
| CN103074550A (en) * | 2013-02-06 | 2013-05-01 | 上海电气电站设备有限公司 | Turbine rotor steel material resisting high temperature of 620 DEG C |
-
2016
- 2016-11-22 CN CN201611044811.7A patent/CN108085615A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05156350A (en) * | 1991-12-03 | 1993-06-22 | Daido Steel Co Ltd | Manufacture of molding die for heat resistant glass |
| CN1209464A (en) * | 1997-03-25 | 1999-03-03 | 株式会社东芝 | High-toughness thermo-resisting steel, turbine rotor and mfg. method therefor |
| CN102560275A (en) * | 2010-12-28 | 2012-07-11 | 株式会社东芝 | Heat resistant cast steel, manufacturing method thereof, cast parts of steam turbine, and manufacturing method of cast parts of steam turbine |
| CN102517508A (en) * | 2011-12-30 | 2012-06-27 | 钢铁研究总院 | Ferrite refractory steel for vane of steam turbine of ultra supercritical fossil power plant and manufacturing method |
| CN102517517A (en) * | 2011-12-30 | 2012-06-27 | 山东理工大学 | Refractory steel for vane of steam turbine of ultra supercritical fossil power plant and manufacturing method |
| CN103074550A (en) * | 2013-02-06 | 2013-05-01 | 上海电气电站设备有限公司 | Turbine rotor steel material resisting high temperature of 620 DEG C |
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Application publication date: 20180529 |