CN104294161B - A kind of for high temperature resistant Cutting free high-strength steel - Google Patents
A kind of for high temperature resistant Cutting free high-strength steel Download PDFInfo
- Publication number
- CN104294161B CN104294161B CN201410600323.4A CN201410600323A CN104294161B CN 104294161 B CN104294161 B CN 104294161B CN 201410600323 A CN201410600323 A CN 201410600323A CN 104294161 B CN104294161 B CN 104294161B
- Authority
- CN
- China
- Prior art keywords
- steel
- cutting
- strength
- content
- present
- 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.)
- Active
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
- C22C38/32—Ferrous alloys, e.g. steel alloys containing chromium with boron
-
- 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
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
-
- 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
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
-
- 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
-
- 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
-
- 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
- C22C38/28—Ferrous alloys, e.g. steel alloys containing chromium with titanium or zirconium
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
One for high temperature resistant Cutting free high-strength steel, its component and wt% is: C:0.15～0.35%, Si:0.40～0.60%, Mn:1.2～1.5%, P≤0.015%, S≤0.015%, N:0.04～0.06%, B:0.01～0.02%, Al:0.01～0.03%, Ti:0.04～0.06%, Mo:0.025～0.035%, Cr:0.06～0.12%.The present invention not only non-environmental-pollution, cutting ability is excellent, i.e. cutting ability is same as Pd series free-cutting steel, and it is simple at composition, on the premise of existing technique, yield strength Rel >=750Mpa, tensile strength Rm >=1000Mpa, elongation percentage A >=20%, contraction percentage of area Z >=35%, and by using Cr Mo alloying to improve steel heat resistance, i.e. improved to being not less than 500 DEG C at about 400 DEG C by existing heat resisting temperature, and using improving more than 6 months for about 24 months of period ratio prior art, it has fully met the requirement of heat resistant type high-strength steel.
Description
Technical field
The present invention relates to a kind of automatic steel, specifically belong to a kind of high temperature resistant middle parts Cutting free high-strength steel.
Background technology
Development along with mechanical industry, the particularly popularization and application of Digit Control Machine Tool, the parts steel such as high temperature resistant parts steel such as boiler, engine, heating pipe network, do not require nothing more than the heat resistance identical with main equipment and good mechanical performance, also parts machinability is required the strictest, and conventional art improves cutting ability often premised on sacrificing steel mechanical performance, this makes prior art face the problem that cannot overcome, even if steel still have higher heat resistance while having good cutting, mechanical performance concurrently.
For current automatic steel: though lead treated steel has the feature of excellent cutting ability (cutter life, chip treatability, machined surface fineness etc.), but owing to lead can migrate in environment from steel, especially in hot environment, migration rate is faster, harmful, environmental pollution is bigger, from the angle of environmental protection, it is clear that be not to continue with the object with research and development from now on.
Though being unleaded environment protection type easy Cutting Steel for automatic steels such as sulphur system, bismuth systems, but produce due to it or application all faces various problem: such as sulphur higher in resulfurizing series free cutting steel, oxygen content, MnS in purity of steel, severe exacerbation steel mechanics performance and steel can be reduced be mingled with, Mechanical Property Anisotropy can be caused to increase, limit its range of application；For containing Se(selenium), Te(tellurium), Bi(bismuth) etc. the automatic steel of rare element, although its cutting ability can be improved, and will not significantly deteriorate steel mechanics performance, but limit its application because of cost intensive equally.
Being confined to above-mentioned the deficiencies in the prior art, free-cutting machinability is often difficult to become the target that heat resistant type high-strength steel is considered, and this causes heat resistant type high-strength steel to be difficult to the requirement meeting Digit Control Machine Tool to the machinability of material, reduces production efficiency, improves production cost.
BN type automatic steel belongs to novel environment-friendly lead free free-cutting steel, it utilizes the BN similar with crystal structure of graphite to be mingled with and improve cutting rolled steel performance, make steel have the machinability suitable with lead series free cutting steel, and mechanical property is as good as with mother metal, thus become international automatic steel research and development focus.
Through retrieval: China Patent Publication No. is the patent document of CN102703839A, it discloses a kind of high-strength simple-cutting steel.Its chemical component weight percentage is, C:0.05-0.20%, Si:0.10-0.40%, Mn:1.00-2.00%, P :≤0.040%, S:0.070-0.200%, Al :≤0.010%, Cr:0.20-0.50%, Ti:0.03-0.10%, B:0.008-0.0035%, remaining is iron and inevitable impurity.Its deficiency existed: document steel grade is low-carbon (LC) resulfurizing series free cutting steel, although using Ti microalloying, but the best (the i.e. yield strength Rel >=450MPa of its mechanical property, tensile strength Rm >=650MPa, elongation percentage A >=20%, contraction percentage of area Z >=55%), the addition of its sulphur improves cutting rolled steel performance, but increase Mechanical Property Anisotropy, thus limit its range of application, and rely solely on Cr(0.20-0.50% in steel) improve steel heat resistance effect poor.China Patent Publication No. is the patent document of CN103397255, it discloses the high-performance automatic steel that a kind of anisotropy is little, its chemical constituent percentage by weight is, C:0.10-0.70%, Si:0.10-0.60%, Mn:0.20-1.50%, P: < 0.025%, S: < 0.010%, Al:0.02% to 0.08%, B:0.021-0.028%, N:0.02-0.04%, Cu:0.70-2.00%, surplus is iron and inevitable impurity.Its deficiency existed: this patent belongs to BN type automatic steel and has excellent cutting ability, although using Cu to improve steel mechanics performance, but it is undesirable to improve effect, i.e. its yield strength Rel >=400Mpa, tensile strength Rm >=600Mpa, elongation percentage A >=16%, it is difficult to meet the requirement of high intensity, and chemical composition lacks element such as Cr, the Mo etc. strengthening steel heat resistance, thus steel resistance to elevated temperatures cannot be guaranteed.
For avoiding steel strength to reduce or lead contamination in prior art, and its processing characteristics is not paid attention to, i.e. in heat resistant type high-strength steel and do not add Cutting free element, thus cutting rolled steel poor performance；Also having the report of relevant environment-friendly type BN patent, if China Patent Publication No. is the patent document of CN103397255, but its heat resistance and intensity are relatively low, it is difficult to adapt to the use requirement under hot environment.
For overcoming above-mentioned the deficiencies in the prior art, the present invention utilizes BN to be mingled with to improve cutting rolled steel performance, and improves steel heat resistance and intensity by Cr-Mo and Ti Alloying, produces a kind of heat resistant type high-strength simple-cutting steel.
Summary of the invention
The present invention is directed to the deficiencies in the prior art, one not only non-environmental-pollution is provided, cutting ability is excellent, and yield strength Rel >=750Mpa, tensile strength Rm >=1000Mpa, elongation percentage A >=20%, contraction percentage of area Z >=35%, and by use Cr-Mo alloying improve steel heat resistance, i.e. by existing heat resisting temperature about 400 DEG C raisings to being not less than 500 DEG C, and the use cycle be improved for high temperature resistant Cutting free high-strength steel.
Realize the measure of above-mentioned purpose:
A kind of for high temperature resistant Cutting free high-strength steel, its component and weight percent content be: C:0.15～0.35 %, Si:0.40～0.60 %, Mn:1.2～1.5 %, P≤0.015 %, S≤0.015 %, N:0.04～0.06 %, B:0.01～0.02 %, Al:0.01～0.03 %, Ti:0.04～0.06 %, Mo:0.025～0.035 %, Cr:0.06～0.12 %, and remaining is Fe and inevitable impurity.
Preferably: the weight percent content of C is 0.17～0.33%.
Preferably: the weight percent content of Mo is 0.028～0.033%.
Preferably: the weight percent content of Cr is 0.08～0.12%.
Each element interaction in the present invention:
C: steel strength is had a major impact by carbon content, too high carbon content makes steel medium pearlite ratio increase, and makes the intensity of steel improve, is unfavorable for the machining of automatic steel；And too low carbon content can reduce the intensity of steel, and make steel the softest, reduce steel mechanics performance and chip-breaking performance.When carbon content less than 0.15% steel is found through experiments the softest, working angles iron filings length and the most easily broken, thus cutting ability is the best, steel strength is relatively low simultaneously；When carbon content is more than 0.35%, steel matrix hardness is higher, and Cutter wear is more serious and mechanical property surplus capacity is higher, thus considers mechanical property and cutting ability, and carbon content is designed as 0.15～0.35%, preferably: C is 0.17～0.33%.
Si: mainly improve the intensity of steel with solution strengthening form, but too high silicone content can deteriorate the cold deformation ability of steel, and its deoxidation products has higher hardness, working angles Cutter wear is serious, and silicone content the most of the present invention is designed as 0.40～0.60%.
The solution strengthening effect of Mn: in ferrite, Mn is only second to P and Si, can improve steel strength, and will not significantly deteriorate the deformability of steel, but content less than 0.80% time, it strengthens DeGrain；Mn can also react generation MnS with S and be mingled with raising cutting rolled steel performance, and can prevent from causing hot short low melting point FeS to separate out at crystal boundary, MnS is mingled with simultaneously can also become BN and be mingled with forming core core, reduce BN and be mingled with required this free energy of jeep of precipitation, increase BN and be mingled with precipitation quantity, thus improve the cutting ability of steel.Therefore, Fe content of the present invention is designed as 1.2～1.5%.
P: its energy reinforced ferrite phase, but P is harmful element for steel performance, requires that its content is the lowest more good in theory, the performance of guarantee steel of the present invention.Therefore, phosphorus content of the present invention is designed as less than 0.015%.
S: the MnS that in steel, sulphur and manganese can be formed is mingled with and can be mingled with forming core core as BN, improves BN and is mingled with nucleation rate, increases BN in steel and is mingled with quantity, but too much MnS is mingled with the anisotropy that can increase steel performance, the serious application limiting steel.Therefore, sulfur content of the present invention is designed as less than 0.015%.
N: in steel, N with B reacts to generate and be conducive to the BN improving cutting ability to be favorably mingled with, and by Ti(C, N) generation realize titanium microalloying improve steel strength purpose, therefore steel needs appropriate N content, if but N content is too much, and can deteriorate steel mechanics performance and reduce the rate of steel products produced to steel ingots.Therefore, nitrogen content of the present invention is designed as 0.04～0.06%.
The interpolation of B:B is to be mingled with for formation BN, to improve cutting rolled steel performance.In steel, B content is too low, it is difficult to the BN generating q.s is mingled with, too high, easily deteriorates steel toughness and is unfavorable for steel popularization and application.B content the most of the present invention is designed as 0.01～0.02 %.
Al: aluminium adds in steel as deoxidier, and a certain amount of aluminium may advantageously facilitate the precipitation that BN is mingled with, but the Al of excess can affect steel mechanics performance, reduces cutting rolled steel performance.Therefore, aluminium content of the present invention is designed as 0.01～0.03%.
Ti: add as the micro alloying element improving steel strength, the carbonitride intergranular precipitation of titanium separates out energy crystal grain thinning, makes the intensity of steel increase and keeps fine grain structure when higher temperature, improve heat endurance and the intensity of steel.But too much titanium can increase smelting difficulty and cause steel hardness higher, and then increase the abrasion of cutter, reduce cutting ability.Therefore, Ti content of the present invention is designed as 0.04～0.06%.
Mo: molybdenum is alloying element important in steel, and ferrite is had solution strengthening effect, can improve the stability of carbide, therefore favourable to the elevated temperature strength improving steel.And intensity and the toughness (particularly resistance to elevated temperatures) of steel can be effectively improved；Improve hardness and the wearability of steel, improve quenching degree and the hardenability of steel part, purify crystal boundary and improve resistance for delayed fracture.But too much molybdenum can increase smelting cost.Steel adds a small amount of molybdenum and can be obviously enhanced steel strength, there is higher input-output ratio.Being found through experiments, when in steel, Mo content is less than 0.025%, steel strength is relatively low, it is difficult to meet the requirement of high intensity；When Mo content is higher than 0.035%, steel hardness is higher causes working angles tool wear serious.Therefore consider molybdenum content in steel of the present invention and be designed as 0.025～0.035%, preferably: Mo is 0.028～0.033%.
Cr: chromium is primarily present in cementite (Fe3C) in, the chromium being dissolved in cementite improves the decomposition temperature of carbide, prevents the generation of graphitization phenomenon, and then improves the heat resistance of steel, and can improve steel corrosion resisting property.Being found through experiments, when in steel, Cr content is in 0.06% to 0.12%, steel are heat-resisting and corrosion resisting property is all good, and can meet use requirement very well.Therefore, chromium content of the present invention is designed as 0.06～0.12%, preferably: Cr is 0.08～0.12%.
The present invention is compared with prior art, not only non-environmental-pollution, cutting ability is excellent, i.e. cutting ability is same as Pd series free-cutting steel, and it is simple at composition, on the premise of existing technique, yield strength Rel >=750Mpa, tensile strength Rm >=1000Mpa, elongation percentage A >=20%, contraction percentage of area Z >=35%, and by using Cr-Mo alloying to improve steel heat resistance, i.e. improved to being not less than 500 DEG C at about 400 DEG C by existing heat resisting temperature, and use improving more than 6 months for about 24 months of period ratio prior art, it has fully met the requirement of heat resistant type high-strength steel.
Accompanying drawing explanation
Fig. 1 is that the TiN playing Microalloying Effect in the present invention is mingled with shape appearance figure
Fig. 2 is the TiN energy spectrogram playing Microalloying Effect in the present invention；
Fig. 3 is steel grade rolled metallographic structure of the present invention.
Detailed description of the invention
Below the present invention is described in detail:
Table 1 is the value list of various embodiments of the present invention and comparative example；
Table 2 is various embodiments of the present invention and comparative example performance detection case list.
Various embodiments of the present invention produce according to following common process:
Electric furnace (converter) → refining (LF, VD, RH) → continuous casting → (heating) rolling is become a useful person；
Wherein, control square billet heating-up temperature at 1150～1250 DEG C, temperature retention time 100～150min；Roughing start rolling temperature is at 1100～1200 DEG C；Finish rolling finishing temperature 850～900 DEG C；Hot rolled rod carries out Water cooling, cooling velocity 50～120 DEG C/min after finish rolling；After bundling, enter to cheat slow cooling to room temperature.The technological parameter of each embodiment is arbitrarily chosen in described scope.
The value list (wt%) of table 1 various embodiments of the present invention and comparative example
Table 2 various embodiments of the present invention and comparative example capabilities list
Knowable to table 2 data, mechanical property of the present invention meets: yield strength Rel >=750Mpa, tensile strength Rm >=1000Mpa, elongation percentage A >=20%, contraction percentage of area Z >=35%, and cutter life significantly improve, cutting ability is excellent, heat resistance is at least at 500 DEG C, and the use cycle at least can extend 6 months, and after cutting, steel surface is highly polished.
Above-described embodiment is only and most preferably enumerates, and is not the restriction to embodiments of the present invention.
Claims (1)
1. one kind is used for high temperature resistant Cutting free high-strength steel, its component and weight percent content be: C:0.15～0.35 %, Si:0.40～0.60 %, Mn:1.2～1.5 %, P≤0.015 %, S≤0.015 %, N:0.045～0.06 %, B:0.01～0.02 %, Al:0.01～0.015 %, Ti:0.04～0.06 %, Mo:0.025～0.035 %, Cr:0.06～0.12 %, and remaining is Fe and inevitable impurity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410600323.4A CN104294161B (en) | 2014-10-31 | 2014-10-31 | A kind of for high temperature resistant Cutting free high-strength steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410600323.4A CN104294161B (en) | 2014-10-31 | 2014-10-31 | A kind of for high temperature resistant Cutting free high-strength steel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104294161A CN104294161A (en) | 2015-01-21 |
| CN104294161B true CN104294161B (en) | 2016-08-24 |
Family
ID=52314107
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410600323.4A Active CN104294161B (en) | 2014-10-31 | 2014-10-31 | A kind of for high temperature resistant Cutting free high-strength steel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104294161B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104946987A (en) * | 2015-05-28 | 2015-09-30 | 武汉钢铁(集团)公司 | High-strength finish rolled steel bar and production method thereof |
| CN105779867B (en) * | 2016-03-10 | 2017-08-25 | 山东钢铁股份有限公司 | A kind of Cutting free wear-resisting steel plate and preparation method thereof |
| CN105950971B (en) * | 2016-05-12 | 2018-03-16 | 武汉钢铁有限公司 | A kind of yield strength >=960MPa levels steel for engineering machinery and production method |
| CN109234626B (en) * | 2018-07-18 | 2020-11-24 | 石家庄钢铁有限责任公司 | Free-cutting steel for heavy-duty automobile hub bearing and manufacturing method thereof |
| RU2696798C1 (en) * | 2018-11-26 | 2019-08-06 | Федеральное государственное автономное образовательное учреждение высшего образования "Южно-Уральский государственный университет (национальный исследовательский университет)" ФГАОУ ВО "ЮУрГУ (НИУ)" | Medium carbon chrome-molybdenum easily processed bn-containing steel |
| RU2696802C1 (en) * | 2018-12-29 | 2019-08-06 | Федеральное государственное автономное образовательное учреждение высшего образования "Южно-Уральский государственный университет (национальный исследовательский университет)" ФГАОУ ВО "ЮУрГУ (НИУ)" | Easily machined chromo-manganese molybdenum bn-containing steel |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5817820B2 (en) * | 1979-02-20 | 1983-04-09 | 住友金属工業株式会社 | High temperature chrome steel |
| CN1144895C (en) * | 2000-03-24 | 2004-04-07 | 川崎制铁株式会社 | Non-refined steel being reduced in anisotropy of material and excellent in strength, toughness and machinability, and its making method |
| CN102952995A (en) * | 2011-08-25 | 2013-03-06 | 徐芗明 | Environment-friendly leadless free-cutting steel and metallurgy method thereof |
| CN102925806B (en) * | 2012-12-01 | 2014-12-31 | 新余钢铁集团有限公司 | Y55 mark free-cutting steel plate and manufacture method thereof |
| CN103397255B (en) * | 2013-08-09 | 2015-07-08 | 武汉钢铁(集团)公司 | High-performance free-cutting steel with small anisotropy |
-
2014
- 2014-10-31 CN CN201410600323.4A patent/CN104294161B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN104294161A (en) | 2015-01-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104294161B (en) | A kind of for high temperature resistant Cutting free high-strength steel | |
| CN103146997B (en) | A kind of low-alloy high-flexibility wear-resistant steel plate and manufacture method thereof | |
| CN100455692C (en) | High-strength weathering steel and method of manufacturing same | |
| CN102965574B (en) | Titanium microalloying hot-rolling thick steel plate with low yield ratio and high strength and production process of steel plate | |
| KR102218051B1 (en) | High-hardness, high-toughness, wear-resistant steel plate and manufacturing method thereof | |
| CN102618791B (en) | High strength and ductility oil casing with hydrogen sulfide corrosion resistance and manufacturing method for oil casing | |
| CN106319380A (en) | Low compression ratio 690MPa grade extra thick steel plate and production method thereof | |
| CN104480406A (en) | Low-alloy high-strength high-toughness steel plate and manufacturing method thereof | |
| CN105506494A (en) | High-toughness hot-rolled high-strength steel with yield strength being 800 MPa and manufacturing method of high-toughness hot-rolled high-strength steel | |
| CN102747290B (en) | Economical wear-resistant steel and manufacturing method thereof | |
| CN103981446B (en) | A kind of bainite type 700MPa level Twisted Steel and production method thereof | |
| CN111500928B (en) | Low-temperature high-toughness high-temperature high-strength and high-hardenability hot die steel and preparation technology thereof | |
| CN104357742A (en) | 420MPa high-thickness hot-rolled steel sheet for ocean engineering and production method thereof | |
| CN109161793A (en) | A kind of low yield strength ratio high-strength weathering steel and its production method | |
| CN101956141A (en) | Low-cost non-quenched and tempered high-strength wear-resistant steal plate with yield strength of 780 MPa grade and manufacturing method thereof | |
| CN102676947B (en) | Welded structural steel and manufacturing method thereof | |
| CN102953016B (en) | A kind of 650HB grade wear-resisting steel plate and manufacture method thereof | |
| CN110423938A (en) | TMCP type surrenders 500MPa level structure steel plate and its production method | |
| CN103397255B (en) | High-performance free-cutting steel with small anisotropy | |
| CN107460412A (en) | A kind of high-strength anticorrosion steel and its milling method | |
| CN103243278A (en) | X90 pipeline steel and production method thereof | |
| CN103014520A (en) | F+P+B type low-yield-ratio and high-strength medium steel plate and production method thereof | |
| CN103667921B (en) | The uniform high-strong toughness Plate Steel of through-thickness performance and production method thereof | |
| CN101565800B (en) | Steel plate with obdurability and strong plasticity and manufacturing method thereof | |
| WO2019029533A1 (en) | Cast steel, preparation method for cast steel and use of cast steel |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170713 Address after: 430083 Qingshan District, Hubei, Wuhan factory before the door No. 2 Patentee after: Wuhan iron and Steel Company Limited Address before: 430080 Wuhan, Hubei Friendship Road, No. 999, Wuchang Patentee before: Wuhan Iron & Steel (Group) Corp. |