CN108642406A - A kind of martensite heat-resistant steel - Google Patents
A kind of martensite heat-resistant steel Download PDFInfo
- Publication number
- CN108642406A CN108642406A CN201810473092.3A CN201810473092A CN108642406A CN 108642406 A CN108642406 A CN 108642406A CN 201810473092 A CN201810473092 A CN 201810473092A CN 108642406 A CN108642406 A CN 108642406A
- Authority
- CN
- China
- Prior art keywords
- martensite heat
- steel
- heat
- resistant steel
- 15cr12wmov
- 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.)
- Pending
Links
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
- C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
-
- 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
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
The present invention relates to a kind of martensite heat-resistant steels, and on the basis of 15Cr12WMoV martensite heat-resistant steel standard analysis, addition Nb elements increase Mo constituent contents, are also added with Cu, Co element, and reduce content of element W, by mass percentage, ingredient is：C：0.12 ~ 0.15%, Cr:12 ~ 13%, Mo:0.8 ~ 1.2%, W:0.3 ~ 0.5%, V:0.1~0.2%,Co:0.03 ~ 0.05%, Mn:0.4 ~ 0.6%, Cu：0.05 ~ 0.1%, Si：0.3 ~ 0.5%, Ni：0.4 ~ 0.6%, Nb：0.1 ~ 0.2%, P≤0.02%, S≤0.01%, surplus are iron and other inevitable impurity elements.It is an object of the invention to by being optimized to 15Cr12WMoV type martensite heat-resistant steels, provide a kind of 15Cr12WMoV X-type martensite heat-resistant steels of the high comprehensive performances such as hardness, intensity, toughness.
Description
Technical field
The present invention relates to the field of metallurgy of iron, especially a kind of martensite heat-resistant steel.
Background technology
China's coal electricity generated energy accounts for power generation total amount most probably left and right, and main generating equipment is overcritical, ultra supercritical power generation machine
Group is rapidly increased with electric consumption and environmental pollution in recent years, and there is an urgent need to high efficiency generation technologies, and generating set will be pursued more
High efficiency is then required to the more energy of the Innovation Input of high-temperature heat-resistance material；It is pressurized volute etc. simultaneously for aircraft turbine,
Because service condition is harsher, also there is larger requirement to the performance of material.It is resistance to that high-temperature heat-resistance material is broadly divided into ferrite/martensite
Two class of hot steel and austenitic heat-resistance steel, austenitic heat-resistance steel are mainly used for the steam pipe of boiler and exchange tracheae etc., but due to
The thermophysical property of austenitic heat-resistance steel itself（Coefficient of thermal expansion is larger, easily causes fatigue cracking）, it limits its scope of application,
And cost is higher.And ferrite/martensite heat resisting steel does not have the above problem, so it is resistance to develop high performance ferrite/martensite
Hot steel is the main path for producing power generator set component, aircraft turbine supercharging volute etc..
15Cr12WMoV（Old trade mark 1Cr12WMoV）Martensite heat-resistant steel performance is better, is widely used as a variety of generators
Group parts, blade material and aircraft turbine supercharging volute etc., but with social progress and the fast development of industry, it is existing
Martensite heat-resistant steel cannot meet the following large capacity and high parameter is overcritical, ultra supercritical power generation technology in China and aircraft etc.
Demand, such as hardness, intensity, toughness, it is higher comprehensive to pursue at present there is an urgent need to further be researched and developed to it
Energy.
Invention content
It is an object of the invention to by being optimized to 15Cr12WMoV type martensite heat-resistant steels, provide a kind of hardness,
The 15Cr12WMoV-X type martensite heat-resistant steels of the high comprehensive performances such as intensity, toughness.
The technical scheme is that：A kind of martensite heat-resistant steel, 15Cr12WMoV martensite heat-resistant steels standard at
On the basis of point, addition Nb elements increase Mo constituent contents, Cu, Co element are in addition also added with, and reduce content of element W, by matter
Percentages are measured, ingredient is：C：0.12 ~ 0.15%, Cr:12 ~ 13%, Mo:0.8 ~ 1.2%, W:0.3 ~ 0.5%, V:0.1~0.2%,
Co:0.03 ~ 0.05%, Mn:0.4 ~ 0.6%, Cu：0.05 ~ 0.1%, Si：0.3 ~ 0.5%, Ni：0.4 ~ 0.6%, Nb：0.1 ~ 0.2%, P0.02%, S0.01%, surplus is iron and other inevitable impurity elements.
Particularly, ingredient is the martensite heat-resistant steel by mass percentage：C：0.13%, Cr:12%, Mo:1.01%,
W:0.36%, V:0.18%, Co:0.03%, Mn：0.43%, Cu：0.06%, Si：0.34%, Ni：0.59%, Nb：0.15%, P：
0.018%, S：0.007%, surplus is iron and other inevitable impurity elements.
The Brinell hardness HB of the martensite heat-resistant steel is 223 ~ 238, tensile strength RmFor 760 ~ 800MPa, yield strength
R0.2It is 22 ~ 26% for 600 ~ 630 MPa, elongation after fracture A, contraction percentage of area Z is 55 ~ 60%, and ballistic work absorbs work(Ekv2For 50 ~
55J。
The beneficial effects of the present invention are：First, according to associated materials studies have shown that addition Nb, increases Mo elements, drop
Low content of element W effect is as follows：These three are ferrite former, and Nb can form tiny carbon in martensite heat-resistant steel
Nitride plays precipitation enhancement, improves the elevated temperature strength of steel；Mo is strong by the disperse of the carbide of solution strengthening and its formation
Change, improves alloy recrystallization temperature and heat resistance；W prevents martensite back by solution strengthening, promotes M23C6It generates, for a long time
Promote Laves phases to be grown in Grain and sub-grain boundary under high-temperature service, improves creep strength, but work as the excessively high Laves phases of W content
The rapid agglomeration of meeting loses pinning effect, and consumes W, Cr etc. for playing solution strengthening in matrix, reduces solution strengthening effect
Fruit, while in view of ferrite former excessively easily makes high temperatureFerrite remains into room temperature, therefore reduces content of element W, with
Ensure intensity, the hardness of steel.
Then, after above-mentioned ferrite former composition design, the austenite formers thinking such as addition Cu, Co is such as
Under：Although above-mentioned ferrite former design is by fully considering, ferritic phase is softening phase for matrix, therefore before requiring
Person's amount cannot be excessive, therefore is balanced by adding austenite former：Co, Cu, can be bright as strong austenite former
It is aobvious to widen austenite phase field, effectively inhibit soft phase ferritic phase to generate, ensures the intensity and hardness of steel；It is heat-resisting to martensite simultaneously
Steel, martensitic structure more as possible when also requiring room temperature, martensitic phase is originally that carbon existsSupersaturated solid solution in-Fe, has
Higher intensity and hardness, and Co is as few in number, raising martensite transformation temperature MSThe element of point, can guarantee heat treatment
Middle martensite transfor mation is easier, and is provided adequate condition to obtain full martensitic structure, is further ensured that steel high intensity and hardness.
Finally, due to which the balance of ferrite, austenite former, makes finally obtained to be almost full martensitic structure
（Mass fraction>99%）,Ferrite phasor is few, and Dispersed precipitate plays invigoration effect, while existing research on martensitic matrix
Show that material ductile-brittle transition temperature can be reduced in this case, improves the toughness of steel.
Description of the drawings
Fig. 1 is that the SEM of 1# martensite heat-resistant steel sample tissues schemes.
Fig. 2 is 1# martensite heat-resistant steel sample Tensile fractures SEM figures.
Specific implementation mode
The invention will be further described with reference to the accompanying drawings and examples.
By mass percentage, standard（GB/T1221-2007）15Cr12WMoV martensite heat-resistant steels composition range, this hair
15Cr12WMoV-X steel in bright middle 15Cr12WMoV-X composition of steel range, embodiment（It is denoted as 1# steel）Ingredient is as follows.
Standard 15Cr12WMoV martensite heat-resistant steel composition ranges：C：0.12 ~ 0.18%, Cr:11 ~ 13%, Mo:0.5~
0.7%, W:0.7 ~ 1.1%, V:0.15 ~ 0.3%, Mn:0.5 ~ 0.9%, Si：0 ~ 0.5%, Ni：0.4 ~ 0.8%, P0.035%, S0.03%, surplus is iron.
15Cr12WMoV-X composition of steel range in the present invention：C：0.12 ~ 0.15%, Cr:12 ~ 13%, Mo:0.8 ~ 1.2%, W:
0.3 ~ 0.5%, V:0.1~0.2%, Co:0.03 ~ 0.05%, Mn:0.4 ~ 0.6%, Cu：0.05 ~ 0.1%, Si：0.3 ~ 0.5%, Ni：
0.4 ~ 0.6%, Nb：0.1 ~ 0.2%, P0.02%, S0.01%, surplus is iron and other inevitable impurity elements.
1# steel：C：0.13%, Cr:12%, Mo:1.01%, W:0.36%, V:0.18%, Co:0.03%, Mn：0.43%, Cu：
0.06%, Si：0.34%, Ni：0.59%, Nb：0.15%, P：0.018%, S：0.007%, surplus is iron and other are inevitable
Impurity element.
Steel in the present invention is prepared as follows, is heat-treated：
（1）In alloying component ratio, ingot casting is cast for after melting in vaccum sensitive stove, strictly controls impurity content；
（2）By step（1）Obtained green body carries out air-cooled normalized treatment after 950 ~ 1050 DEG C of 0.5 h of heat preservation；
（3）By step（2）Obtained material carries out air-cooled temper after 700 ~ 750 DEG C of 1 h of heat preservation.
1# steel takes the sample of suitable size after above-mentioned steps are handled, and is first polished, is thrown with sand paper and polishing machine
Light, then with picric acid hydrochloride alcohol solution（Picric acid（g）+ hydrochloric acid（ml）+ alcohol（ml）, ratio 4:5:100, corrosion
Time is 10 ~ 30s）Corroded, passes through SEM（Scanning electron microscope）Observe its microscopic structure, 5000 times of amplification factor, such as
Shown in Fig. 1.See from figure, original austenite crystal prevention is apparent, in keep the matrix of lath martensite position phase in order, it is former
White particulate object on austenite grain boundary, lath circle and matrix, most of is Dispersed precipitateFerrite plays by force material
Change acts on, proof strength, hardness.
Brinell hardness HB tests are carried out to 1# steel curved beams, after impression diameter takes mean value, table look-up to obtain hardness number to be 229, knot
Fruit shows in lower section.
In addition the 1# Steel materials obtained through above three step are machined, be prepared respectively tensile sample and
Impact specimen, after carry out tensile test at room temperature and impact test respectively again.1# steel correlation intensity and toughness etc. are obtained after experiment
Results of property is shown in lower section.
Table 2,1# Steel Properties test result and standard（GB/T1221-2007）15Cr12WMoV martensite heat-resistant steels（In table 2
Title standard is rigid）Correlated performance compares.
| Brinell hardness HB | Tensile strength Rm(N/mm2) | Yield strength R0.2(N/mm2) | Elongation after fracture A (%) | Contraction percentage of area Z (%) | Ballistic work absorbs Akv2(J) | |
| Standard is rigid | - | ≥735 | - | ≥15 | ≥45 | ≥47 |
| 1# steel | 229 | 766 | 615 | 24 | 58 | 53 |
As can be seen that the properties of 1# steel are satisfied by requirement, and it has been more than certain numerical value, the property such as hardness, intensity, toughness
Energy is good, especially elongation after fracture, improves 60%, side illustration toughness is greatly improved.（Note that while in standard not
Brinell hardness HB occurrences are provided, but utilize tensile strength Rm735 N/mm of value2, it is corresponding that its can be obtained by conversion of tabling look-up
Ball hardness number HB, about 219, therefore the present invention is also to meet the requirements and is more than certain numerical value）.
Fig. 2 is 1# steel curved beam Tensile fracture micrograms（First by the later sample of tension failure, the behaviour such as metal wire cutting are carried out
Work removes rupture portion, is observed so that the later stage is placed on the sample table of SEM, the fracture removed is immersed in and fills absolute ethyl alcohol
Beaker in, gently shaken in the case where not destroying fracture surface, stir beaker, about 10 ~ 30 min remove line and cut to reach
The purpose for remaining in the cutting fluid near fracture after cutting, is then observed with SEM, amplifies 1000 times）, as can be seen from FIG. significantly
Second phase particles in micropore, dimple and dimple, since dimple is to be formed in crackle and plastic deformation shape occurs in expansion process
At, the formation and extension of crackle just need the energy of bigger, so its presence has indicated that the good plasticity of material, it is tough
Property fracture typical mark, also further embody the preferable toughness of this steel.
Embodiment the result shows that, on the basis of 15Cr12WMoV martensite heat-resistant steel standard analysis, add Cu, Co, Nb
Element increases Mo constituent contents, and reduces content of element W, obtains 15Cr12WMoV-X steel, can reach and further promote steel
Comprehensive performance includes the effect of the performances such as intensity, hardness and toughness, meets application request.
Claims (3)
1. a kind of martensite heat-resistant steel, on the basis of 15Cr12WMoV martensite heat-resistant steel standard analysis, addition Nb elements increase
Add Mo constituent contents, which is characterized in that it is also added with Cu, Co element, and reduces content of element W, by mass percentage, at
It is divided into：C：0.12 ~ 0.15%, Cr:12 ~ 13%, Mo:0.8 ~ 1.2%, W:0.3 ~ 0.5%, V:0.1~0.2%, Co: 0.03~
0.05%, Mn:0.4 ~ 0.6%, Cu：0.05 ~ 0.1%, Si：0.3 ~ 0.5%, Ni：0.4 ~ 0.6%, Nb：0.1 ~ 0.2%, P≤0.02%,
S≤0.01%, surplus are iron and other inevitable impurity elements.
2. a kind of martensite heat-resistant steel according to claim 1, which is characterized in that by mass percentage, ingredient
For：C：0.13%, Cr:12%, Mo:1.01%, W:0.36%, V:0.18%, Co:0.03%, Mn：0.43%, Cu：0.06%, Si：
0.34%, Ni：0.59%, Nb：0.15%, P：0.018%, S：0.007%, surplus is iron and other inevitable impurity elements.
3. a kind of martensite heat-resistant steel according to claim 1 or 2, which is characterized in that tensile strength RmFor 760 ~
800MPa, yield strength R0.2It is 22 ~ 26% for 600 ~ 630 MPa, elongation after fracture A, contraction percentage of area Z is 55 ~ 60%, impact
It is 50 ~ 55J that work(, which absorbs work(E,.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810473092.3A CN108642406A (en) | 2018-05-17 | 2018-05-17 | A kind of martensite heat-resistant steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810473092.3A CN108642406A (en) | 2018-05-17 | 2018-05-17 | A kind of martensite heat-resistant steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108642406A true CN108642406A (en) | 2018-10-12 |
Family
ID=63756350
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810473092.3A Pending CN108642406A (en) | 2018-05-17 | 2018-05-17 | A kind of martensite heat-resistant steel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108642406A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150027598A1 (en) * | 2010-06-28 | 2015-01-29 | Stefan Seng | Chromium-nickel steel, martensitic wire and method for production thereof |
| CN104694832A (en) * | 2015-02-28 | 2015-06-10 | 钢铁研究总院 | Martensitic stainless steel for nuclear reactor and preparation method of stainless steel |
-
2018
- 2018-05-17 CN CN201810473092.3A patent/CN108642406A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150027598A1 (en) * | 2010-06-28 | 2015-01-29 | Stefan Seng | Chromium-nickel steel, martensitic wire and method for production thereof |
| CN104694832A (en) * | 2015-02-28 | 2015-06-10 | 钢铁研究总院 | Martensitic stainless steel for nuclear reactor and preparation method of stainless steel |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2021121185A1 (en) | High-strength and high-toughness antioxidant iron-nickel-based high-temperature alloy, and preparation method thereof | |
| Guo et al. | Aging precipitation behavior and mechanical properties of Inconel 617 superalloy | |
| US20150203944A1 (en) | Austenitic steel alloy having excellent creep strength and resistance to oxidation and corrosion at elevated use temeratures | |
| CN105624469B (en) | Ultra-supercritical boiler nickel base superalloy and its preparation method and application | |
| US20060266439A1 (en) | Heat and corrosion resistant cast austenitic stainless steel alloy with improved high temperature strength | |
| WO2006109664A1 (en) | Ferritic heat-resistant steel | |
| KR100985354B1 (en) | Low alloy steel | |
| CN1718831A (en) | Heat-proof steel and shaft using same for steam turbine,steam turbine and steam turbine generator | |
| CN110280923A (en) | The welding method of 800H alloy welding Fe-Ni based alloy welding wire and preparation method thereof, 800H alloy | |
| CN103695806B (en) | A kind of austenitic heat-resistance steel | |
| JP2008297579A (en) | Nickel-based alloy excellent in structural stability and high tension strength, and method for producing nickel-based alloy material | |
| Martins et al. | Effect of heat treatment on the mechanical properties of ASTM A 890 Gr6A super duplex stainless steel | |
| JP5265325B2 (en) | Heat resistant steel with excellent creep strength and method for producing the same | |
| CN108642406A (en) | A kind of martensite heat-resistant steel | |
| Miyashita et al. | Development and evaluation of large-scale rotor forging for over 700° C-class A-USC steam turbine | |
| JP2018059135A (en) | Ni-BASED HEAT-RESISTANT ALLOY MEMBER AND METHOD FOR PRODUCING THE SAME | |
| JP3900847B2 (en) | Processing method of ferritic heat resistant steel | |
| CN108866453A (en) | A kind of martensite heat-resistant steel and preparation method thereof | |
| CN101525725A (en) | Dipper tooth material | |
| JP7402325B2 (en) | Chrome steel sheet with excellent high-temperature oxidation resistance and high-temperature strength, and its manufacturing method | |
| Wang et al. | High temperature strengthening in 12Cr-W-Mo steels by controlling the formation of delta ferrite | |
| JP4543380B2 (en) | Fuel cell stack fastening bolt alloy | |
| JP3424314B2 (en) | Heat resistant steel | |
| Hamdani et al. | Development of heat-resistant Fe-based alloys for A-USC steam boiler using ultra-high purity (UHP) technology | |
| CN113667807A (en) | Heat-resistant steel, heat treatment method and application |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20181012 |
|
| WD01 | Invention patent application deemed withdrawn after publication |