WO2011089845A1 - 高炭素熱延鋼板の製造方法 - Google Patents
高炭素熱延鋼板の製造方法 Download PDFInfo
- Publication number
- WO2011089845A1 WO2011089845A1 PCT/JP2010/073881 JP2010073881W WO2011089845A1 WO 2011089845 A1 WO2011089845 A1 WO 2011089845A1 JP 2010073881 W JP2010073881 W JP 2010073881W WO 2011089845 A1 WO2011089845 A1 WO 2011089845A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- steel sheet
- less
- cooling
- temperature
- hot
- Prior art date
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
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- 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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/46—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
-
- 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
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
-
- 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
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0226—Hot rolling
-
- 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
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0242—Flattening; Dressing; Flexing
-
- 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
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
- C21D8/0263—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment following hot rolling
-
- 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
- C22C38/04—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
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
Definitions
- the present invention relates to a method for producing a high-carbon hot-rolled steel sheet, particularly high-carbon hot-rolled steel sheet that contains 0.5 mass% or more of C, has little variation in characteristics in the steel sheet, and is excellent in workability and hardenability. .
- High carbon steel plates used for machine structural parts and tools are often subjected to quenching and tempering treatments for hardening after being cold-formed into various shapes. Therefore, high workability and hardenability are required for such high carbon steel sheets, and various techniques have been proposed so far.
- Patent Document 2 discloses that steel containing 0.2 to 0.7% by mass of C is hot-rolled at a finishing temperature (Ar 3 transformation point ⁇ 20 ° C.) or higher, then the cooling rate exceeds 120 ° C./s and cooling is stopped. Cooling at a temperature of 650 ° C. or lower, winding at a coiling temperature of 600 ° C. or lower, pickling, and annealing at an annealing temperature of 640 ° C. or higher and an Ac 1 transformation point or lower is produced. A method is disclosed.
- An object of the present invention is to provide a method for producing a high carbon hot-rolled steel sheet that contains 0.5% by mass or more of C, has small variations in characteristics in the steel sheet, and is excellent in workability and hardenability. To do.
- the present inventors have earnestly studied a method for producing a high carbon hot rolled steel sheet containing 0.5 mass% or more of C, having small variations in characteristics in the steel sheet, and excellent in workability and hardenability.
- it is cooled in a two-stage rapid cooling in which it is allowed to cool in a temperature range of 550 to 650 ° C., that is, cooled and wound in a rapid cooling-cooling-rapid cooling pattern, and then cementite spherical It has been found that it is effective to perform annealing for conversion.
- the present invention has been made on the basis of such findings.
- C 0.5 to 1.0%
- Si 2.0% or less
- Mn 2.0% or less
- P 0.03% or less
- S 0.03% or less
- a method for producing a high carbon hot-rolled steel sheet is provided, characterized by performing secondary cooling to a cooling stop temperature of 600 ° C. and winding, and then annealing at a temperature not lower than 640 ° C. and not higher than the Ac 1 transformation point.
- the average cooling rate during primary cooling is preferably 120 ° C./s or more.
- the sol. Al amount is 0.01% or less in mass%, or in steel slab, and in mass%, Cr: 0.1-2.0%, Mo: 0.1-1.0%, Ni : 0.1-2.0%, Cu: 0.1-1.0%, Ti: 0.01-0.10%, Nb: 0.01-0.10%, V: 0.01-0 10%, B: at least one element selected from 0.0005 to 0.0100% may be contained.
- composition of steel slab whereafter,% which is a unit of content of a component element shall mean the mass% unless otherwise indicated.
- C 0.5 to 1.0% C is an essential element for increasing the strength of the steel sheet after quenching and tempering. If the amount of C is less than 0.5%, the strength required as a material for machine structural parts or tools cannot be obtained. On the other hand, if the amount of C exceeds 1.0%, the steel sheet becomes brittle and the workability is lowered. In addition, residual austenite tends to exist even after quenching, and the strength after heat treatment is saturated or reduced. Therefore, the C content is limited to 0.5 to 1.0%. Preferably it is 0.6 to 0.9%.
- Si 2.0% or less Si has an effect of deoxidizing steel and an effect of increasing the temper softening resistance after quenching, and therefore can be contained as necessary.
- the Si content also has the effect of graphitizing the cementite to lower the hardenability of the steel, so the Si content is limited to 2.0% or less. Preferably it is 0.5% or less.
- Mn 2.0% or less Mn has an effect of enhancing the hardenability of steel and can be contained as required. However, if Mn is contained excessively, the toughness and ductility of the steel are lowered, so the Mn content is limited to 2.0% or less. Preferably it is 1.0% or less.
- P 0.03% or less
- P has an effect of reducing the workability of the steel sheet and the toughness of the steel after the heat treatment, so the P content is limited to 0.03% or less. Preferably it is 0.02% or less.
- the steel slab used in the present invention has the above-described component composition. Note that reducing the content of each element above the refining range to the extent that it is usually practiced, for example, to less than 0.001%, increases the manufacturing cost of the steel sheet, so there is a special reason. Not needed unless
- Hot rolling finishing temperature Ar 3 transformation point or Ar cm transformation point or higher
- the hot rolling finishing temperature is lower than Ar 3 transformation point or Ar cm transformation point
- the pro-eutectoid ferrite or pro-eutectoid cementite is partially precipitated. It is rolled and becomes a non-uniform steel sheet structure, and the uniformity of the characteristic in a steel plate falls. Therefore, the finishing temperature of hot rolling is not less than the Ar 3 transformation point or Ar cm transformation point.
- the steel sheet structure after hot rolling is prepared into a structure mainly composed of uniform pearlite in order to avoid a decrease in manufacturability due to the generation of a low-temperature transformation phase while reducing variations in characteristics in the steel sheet. Therefore, it is essential to avoid coarse precipitation of ferrite and cementite in the cooling process after hot rolling. For this purpose, it is necessary to quickly firstly cool the hot-rolled steel sheet at an average cooling rate of 60 ° C./s or more to a cooling stop temperature of 550 to 650 ° C.
- the cooling stop temperature is lower than 550 ° C.
- a low-temperature transformation phase such as bainite and martensite is partially generated, resulting in uneven cooling after the steel plate shape deteriorates, and consequently, variations in characteristics within the steel plate.
- Cooling time 1.0 to 10 s
- the steel sheet is allowed to cool for 1.0 to 10 seconds.
- the main point of the present invention is to prepare the microstructure of the high carbon steel sheet before annealing into a structure mainly composed of uniform pearlite, and promotion of pearlite transformation by cooling is a very important role.
- the cooling time is less than 1.0 s, the above transformation promotion effect cannot be obtained sufficiently.
- a high carbon steel containing 0.5 mass% or more of C has high hardenability due to a high C content, and easily forms a low-temperature transformation phase. For this reason, if the cooling is performed for a short time of less than 1.0 s, the effect of promoting pearlite transformation is insufficient and the desired structure cannot be prepared.
- the cooling time exceeds 10 s, the steel plate temperature rises due to transformation heat generation as the pearlite transformation progresses, and the pearlite generated in the latter stage of the cooling process becomes coarse, resulting in non-uniform characteristics in the steel plate. Invite. Therefore, the cooling time is limited to the range of 1.0 to 10 s.
- cooling means that the steel sheet is exposed to the atmosphere without forced cooling by water injection or the like.
- injecting a fluid such as compressed air toward the steel sheet for a short time may cause a sufficiently small cooling effect by the injection and impair the effect of the present invention. Not acceptable.
- Secondary cooling average cooling rate 120 ° C / s or more Secondary cooling cooling stop temperature (winding temperature): 500 to 600 ° C
- the steel sheet after being allowed to cool for a predetermined time is cooled again at an average cooling rate of 120 ° C./s or more, and the cooling is stopped at a cooling stop temperature of 500 to 600 ° C. Since the temperature of the steel sheet after being allowed to cool is increased due to transformation heat generation, the steel sheet is cooled again to a temperature of 500 to 600 ° C. and wound up in order to suppress coarsening of the microstructure of the steel sheet.
- the cooling stop temperature exceeds 600 ° C., coarse pearlite is likely to be generated, and the unevenness of the steel sheet structure cannot be completely avoided.
- the cooling stop temperature is less than 500 ° C.
- a low-temperature transformation phase such as bainite or martensite is generated, the steel sheet is excessively hardened and the winding shape is deteriorated, and the workability is significantly reduced.
- the structure mainly composed of a low temperature transformation phase has an advantage that cementite is easily finely dispersed after annealing.
- a high carbon steel containing 0.5 mass% or more of C has a low C transformation phase due to a high C content. Since the hardness of the steel sheet is high and a decrease in the manufacturability and workability of the steel sheet cannot be allowed, the cooling stop temperature is limited to 500 ° C. or higher.
- the average cooling rate after cooling must be 120 ° C./s or more.
- the temperature range of 500 to 600 ° C. is a region where the transition from film boiling to nucleate boiling starts, uneven cooling of the steel sheet is likely to occur.
- the average cooling rate is 120 ° C./s or more
- uneven cooling of the steel sheet is less likely to occur, and variation in characteristics in the steel sheet can be suppressed to a small level. it can.
- Water cooling with an average cooling rate of 240 ° C./s or more is more preferable.
- Annealing temperature 640 ° C. or more and Ac 1 transformation point or less
- the hot-rolled steel sheet after winding is annealed in order to spheroidize cementite.
- the annealing temperature is less than 640 ° C.
- cementite spheroidization does not proceed rapidly.
- the annealing temperature exceeds the Ac 1 transformation point, the steel sheet structure is cooled after being partially re-austenitic during annealing, so that pearlite, that is, non-spheroidized cementite is mixed in the steel sheet structure after annealing.
- the annealing temperature is limited to a range of 640 ° C. or higher and Ac 1 transformation point or lower.
- it is less Ac 1 transformation point 680 ° C. or higher.
- the structure of the hot-rolled steel sheet before annealing is prepared in a structure mainly composed of uniform pearlite, the spheroidization of cementite proceeds efficiently, so the time for holding the hot-rolled steel sheet at the annealing temperature About 10 hours or more. Desirably, it is 15 to 35 hours.
- the annealed steel sheet can be subjected to temper rolling as necessary for correcting the shape of the steel sheet or adjusting the surface properties.
- the Ac 1 transformation point of the steel sheet can be obtained from, for example, a curve change point by measuring a thermal expansion curve in a heating process from room temperature.
- a converter or an electric furnace can be used in the melting of high carbon steel used in the present invention.
- the molten steel is made into a steel slab by continuous casting or ingot rolling after ingot forming. What is necessary is just to heat the steel slab before hot rolling to the temperature which can ensure a predetermined finishing temperature according to the capability of manufacturing equipment.
- the continuously cast steel slab may be hot-rolled directly or after heating for a short time without cooling to room temperature. It is also possible to additionally heat the steel slab during hot rolling with an induction heating device such as a bar heater or an edge heater.
- the average diameter of cementite in the plate thickness cross section After the sample thickness sample parallel to the rolling direction of the sample taken at 1/4 position of the steel plate width is mirror-polished and corroded with Picral, the thickness is 1/4 of the plate thickness. Using a structural photograph taken at a magnification of 5000 times with a scanning electron microscope, the geometric mean of the long diameter and short diameter of each cementite particle is the particle diameter of each cementite particle, and is within the field of view of the structure photograph. The average value of the cementite particles was defined as the average diameter d of the cementite of the steel sheet.
- the average diameter d of cementite can be used as an index of workability and hardenability because it is a measure of the amount of strengthening due to particle dispersion, the degree of stress concentration during processing, and the difficulty of decomposition during quenching heating. was 0.5 to 2.0 ⁇ m, it was evaluated that it was excellent in workability and hardenability.
Abstract
Description
以下、成分元素の含有量の単位である%は、特に断らない限り質量%を意味するものとする。
Cは、焼入焼戻処理後の鋼板強度を高めるために必須の元素である。C量が0.5%未満では、機械構造部品や工具の素材として必要な強度が得られない。一方、C量が1.0%を超えると、鋼板が脆くなって加工性が低下する上、焼入後にも残留オーステナイトが存在し易くなり、熱処理後の強度も飽和あるいは減少する。したがって、Cの含有量は0.5~1.0%に限定する。好ましくは0.6~0.9%である。
Siは、鋼を脱酸する作用や焼入後の焼戻軟化抵抗を高める作用を有するため、必要に応じて含有できる。ただし、Siの含有は、センメンタイトを黒鉛化して鋼の焼入性を低める作用もあるので、Siの含有量は2.0%以下に限定する。好ましくは0.5%以下である。
Mnは、鋼の焼入性を高める作用があり、必要に応じて含有できる。ただし、Mnを過剰に含有すると、鋼の靱性や延性の低下を招くので、Mnの含有量は2.0%以下に限定する。好ましくは1.0%以下である。
Pは、鋼板の加工性や熱処理後の鋼の靱性を低下させる作用があるため、Pの含有量は0.03%以下に限定する。好ましくは0.02%以下である。
Sは、鋼板の加工性や熱処理後の鋼の靱性を低下させる作用があるため、Sの含有量は0.03%以下に限定する。好ましくは0.01%以下である。
Alは、鋼の脱酸のために添加される元素であり、必要に応じて含有できる。ただし、Alの含有量として、鋼中のsol.Al量が0.08%を超えるような添加は、鋼中介在物の増加を招き、鋼板の加工性の低下を招く。そのため、Alの含有量は、sol.Al量で0.08%以下に限定する。好ましくは0.04%以下である。また、鋼が高温に保持される場合、鋼中で固溶Alと固溶Nが化合してAlNが形成され、焼入加熱時にオーステナイト結晶粒の成長を抑制し、鋼板の焼入性を低める場合がある。特に、鋼板を窒素雰囲気中で焼鈍する場合には、雰囲気から鋼中に侵入したNによって上記作用が顕著化する。AlNの形成に起因するこのような鋼板の焼入性低下を避けるためには、Alの含有量を、sol.Al量で0.01%以下とするのがより好ましい。
Nの多量の含有は、鋼中でのAlN形成を通じて、鋼板の焼入性を低める場合がある。そのため、Nの含有量は0.01%以下に限定する。好ましくは0.005%以下である。
本発明による高炭素熱延鋼板の製造方法では、上記した成分組成を有する鋼片を、Ar3変態点あるいはArcm変態点以上の仕上温度で熱間圧延し、60℃/s以上の平均冷却速度で550~650℃の冷却停止温度まで一次冷却後、1.0~10s間放冷し、次いで、120℃/s以上の平均冷却速度で500~600℃の冷却停止温度まで二次冷却して巻き取り、その後、640℃以上Ac1変態点以下の温度で焼鈍する。なお、焼鈍前に鋼板表層に形成されているスケールを酸洗等により除去することが好ましい。本発明の製造条件における限定理由を以下に説明する。
熱間圧延の仕上温度がAr3変態点あるいはArcm変態点未満では、初析フェライトあるいは初析セメンタイトが一部析出した状態で圧延され、不均一な鋼板組織となって鋼板内の特性の均一性が低下する。そのため、熱間圧延の仕上温度はAr3変態点あるいはArcm変態点以上とする。
一次冷却の冷却停止温度(放冷温度):550~650℃
熱間圧延後の一次冷却は、熱間圧延後、550~650℃の範囲の冷却停止温度まで、60℃/s以上の平均冷却速度で行う必要がある。本発明では、鋼板内の特性のばらつきを低減しつつ、低温変態相の生成による製造性の低下を回避するため、熱間圧延後の鋼板組織を均一なパーライトを主体とする組織に調製する。そのため、熱間圧延後の冷却過程において、フェライトやセメンタイトの粗大析出を回避することが必須となる。このためには、熱間圧延後の鋼板を60℃/s以上の平均冷却速度で、550~650℃の冷却停止温度まで速やかに一次冷却する必要がある。
一次冷却後、1.0~10sの間鋼板を放冷する。一次冷却での急冷に続けて放冷することにより、パーライト変態が短時間で進行し、均一なパーライト組織が形成される。本発明の要点は、焼鈍前の高炭素鋼板のミクロ組織を均一なパーライトを主体とする組織に調製することにあり、放冷によるパーライト変態の促進が非常に重要な役割を果たす。
二次冷却の冷却停止温度(巻取温度):500~600℃
所定時間放冷した後の鋼板は、120℃/s以上の平均冷却速度で再度冷却し、500~600℃の冷却停止温度で冷却を停止して巻き取る。放冷後の鋼板は、変態発熱により温度が上昇しているので、鋼板のミクロ組織の粗大化を抑制するため、500~600℃の温度にまで再度冷却してから巻き取る。冷却停止温度が600℃を超える場合には、粗大なパーライトが生成しやすくなり、鋼板組織の不均一化を完全に回避することができない。一方、冷却停止温度が500℃未満の場合には、ベイナイトやマルテンサイトといった低温変態相が生成し、鋼板が過度に硬化して巻形状が悪化するとともに、加工性の大幅な低下を招く。低温変態相主体の組織には、焼鈍後にセメンタイトが微細に分散しやすいといった利点もあるが、0.5質量%以上のCを含有する高炭素鋼では、高いC含有量のために低温変態相の硬度が高く、鋼板の製造性や加工性の低下が許容できないので、冷却停止温度は500℃以上に限定する。
巻き取り後の熱延鋼板は、セメンタイトの球状化を図るために焼鈍する。このとき、焼鈍温度が640℃未満では、セメンタイトの球状化が速やかに進行しない。また、焼鈍温度がAc1変態点を超えると、焼鈍中に鋼板組織が一部再オーステナイト化した後で冷却されるため、焼鈍後の鋼板組織中にパーライト、すなわち球状化されていないセメンタイトが混在し、鋼板内の特性の均一性とともに、加工性や焼入性が低下する。よって、焼鈍温度は、640℃以上Ac1変態点以下の範囲に限定する。好ましくは、680℃以上Ac1変態点以下である。
Claims (4)
- 質量%で、C:0.5~1.0%、Si:2.0%以下、Mn:2.0%以下、P:0.03%以下、S:0.03%以下、sol.Al:0.08%以下、N:0.01%以下を含有し、残部がFeおよび不可避的不純物からなる組成の鋼片を、Ar3変態点あるいはArcm変態点以上の仕上温度で熱間圧延し、60℃/s以上の平均冷却速度で550~650℃の冷却停止温度まで一次冷却後、1.0~10s間放冷し、次いで、120℃/s以上の平均冷却速度で500~600℃の冷却停止温度まで二次冷却して巻き取り、その後、640℃以上Ac1変態点以下の温度で焼鈍することを特徴とする高炭素熱延鋼板の製造方法。
- 一次冷却時の平均冷却速度が120℃/s以上であることを特徴とする請求項1に記載の高炭素熱延鋼板の製造方法。
- 鋼片に含有されるsol.Al量が、質量%で、0.01%以下であることを特徴とする請求項1または2に記載の高炭素熱延鋼板の製造方法。
- 鋼片に、さらに、質量%で、Cr:0.1~2.0%、Mo:0.1~1.0%、Ni:0.1~2.0%、Cu:0.1~1.0%、Ti:0.01~0.10%、Nb:0.01~0.10%、V:0.01~0.10%、B:0.0005~0.0100%の内から選ばれた少なくとも1種の元素が含有されることを特徴とする請求項1から3のいずれか1項に記載の高炭素熱延鋼板の製造方法。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020127021207A KR101390612B1 (ko) | 2010-01-22 | 2010-12-24 | 고탄소 열연 강판의 제조 방법 |
CN201080062133.1A CN102712963B (zh) | 2010-01-22 | 2010-12-24 | 高碳热轧钢板的制造方法 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2010-011860 | 2010-01-22 | ||
JP2010011860A JP5440203B2 (ja) | 2010-01-22 | 2010-01-22 | 高炭素熱延鋼板の製造方法 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2011089845A1 true WO2011089845A1 (ja) | 2011-07-28 |
Family
ID=44306653
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2010/073881 WO2011089845A1 (ja) | 2010-01-22 | 2010-12-24 | 高炭素熱延鋼板の製造方法 |
Country Status (4)
Country | Link |
---|---|
JP (1) | JP5440203B2 (ja) |
KR (1) | KR101390612B1 (ja) |
CN (1) | CN102712963B (ja) |
WO (1) | WO2011089845A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2711439A1 (en) * | 2011-05-18 | 2014-03-26 | JFE Steel Corporation | High carbon thin steel sheet and method for producing same |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5720714B2 (ja) * | 2013-03-27 | 2015-05-20 | Jfeスチール株式会社 | 厚鋼板の製造方法および製造設備 |
CN103614628B (zh) * | 2013-12-12 | 2016-03-30 | 首钢总公司 | 一种65MnTiB钢及其热轧钢板制造方法 |
CN105734437B (zh) * | 2016-04-26 | 2017-06-30 | 东北大学 | 一种纳米级棒状铜析出相强韧化海洋用钢板及其制备方法 |
CN107904517A (zh) * | 2017-10-27 | 2018-04-13 | 湖州正德轻工机械有限公司 | 一种合金钢管的制备方法 |
KR102385480B1 (ko) * | 2018-03-30 | 2022-04-12 | 제이에프이 스틸 가부시키가이샤 | 고강도 강판 및 그 제조 방법 |
CN109338231A (zh) * | 2018-12-06 | 2019-02-15 | 山西太钢不锈钢股份有限公司 | 一种园林工具用热轧卷板及其制造方法 |
MX2021008043A (es) * | 2019-03-06 | 2021-08-05 | Nippon Steel Corp | Lamina de acero laminada en caliente y metodo para producir la misma. |
KR102289519B1 (ko) * | 2019-11-22 | 2021-08-12 | 현대제철 주식회사 | 열연 강재 및 그 제조 방법 |
CN114763592B (zh) * | 2021-01-11 | 2023-05-09 | 宝山钢铁股份有限公司 | 一种低成本高耐磨的耐磨钢及其制造方法 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04124216A (ja) * | 1990-09-12 | 1992-04-24 | Sumitomo Metal Ind Ltd | 成形性の良好な高炭素薄鋼板の製造方法 |
JPH09241788A (ja) * | 1996-03-04 | 1997-09-16 | Kawasaki Steel Corp | 耐衝撃性に優れる高張力鋼板およびその製造方法 |
JP2001164322A (ja) * | 1999-09-29 | 2001-06-19 | Nkk Corp | 薄鋼板および薄鋼板の製造方法 |
JP2005290547A (ja) * | 2004-03-10 | 2005-10-20 | Jfe Steel Kk | 延性および伸びフランジ性に優れた高炭素熱延鋼板およびその製造方法 |
JP2008069452A (ja) * | 2006-08-16 | 2008-03-27 | Jfe Steel Kk | 高炭素熱延鋼板およびその製造方法 |
JP2009024233A (ja) * | 2007-07-20 | 2009-02-05 | Nisshin Steel Co Ltd | 焼入れ性、疲労特性、靭性に優れた高炭素鋼板及びその製造方法 |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ZA924360B (en) * | 1991-07-22 | 1993-03-31 | Bekaert Sa Nv | Heat treatment of steel wire |
US20050199322A1 (en) * | 2004-03-10 | 2005-09-15 | Jfe Steel Corporation | High carbon hot-rolled steel sheet and method for manufacturing the same |
JP5076347B2 (ja) * | 2006-03-31 | 2012-11-21 | Jfeスチール株式会社 | ファインブランキング加工性に優れた鋼板およびその製造方法 |
-
2010
- 2010-01-22 JP JP2010011860A patent/JP5440203B2/ja active Active
- 2010-12-24 WO PCT/JP2010/073881 patent/WO2011089845A1/ja active Application Filing
- 2010-12-24 KR KR1020127021207A patent/KR101390612B1/ko active IP Right Grant
- 2010-12-24 CN CN201080062133.1A patent/CN102712963B/zh active Active
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04124216A (ja) * | 1990-09-12 | 1992-04-24 | Sumitomo Metal Ind Ltd | 成形性の良好な高炭素薄鋼板の製造方法 |
JPH09241788A (ja) * | 1996-03-04 | 1997-09-16 | Kawasaki Steel Corp | 耐衝撃性に優れる高張力鋼板およびその製造方法 |
JP2001164322A (ja) * | 1999-09-29 | 2001-06-19 | Nkk Corp | 薄鋼板および薄鋼板の製造方法 |
JP2005290547A (ja) * | 2004-03-10 | 2005-10-20 | Jfe Steel Kk | 延性および伸びフランジ性に優れた高炭素熱延鋼板およびその製造方法 |
JP2008069452A (ja) * | 2006-08-16 | 2008-03-27 | Jfe Steel Kk | 高炭素熱延鋼板およびその製造方法 |
JP2009024233A (ja) * | 2007-07-20 | 2009-02-05 | Nisshin Steel Co Ltd | 焼入れ性、疲労特性、靭性に優れた高炭素鋼板及びその製造方法 |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2711439A1 (en) * | 2011-05-18 | 2014-03-26 | JFE Steel Corporation | High carbon thin steel sheet and method for producing same |
EP2711439A4 (en) * | 2011-05-18 | 2014-12-03 | Jfe Steel Corp | HIGH-CARBON THIN STEEL SHEET AND METHOD FOR PRODUCING THE SAME |
US9394595B2 (en) | 2011-05-18 | 2016-07-19 | Jfe Steel Corporation | High carbon thin steel sheet and method for producing same |
Also Published As
Publication number | Publication date |
---|---|
JP2011149062A (ja) | 2011-08-04 |
KR20120112788A (ko) | 2012-10-11 |
CN102712963A (zh) | 2012-10-03 |
JP5440203B2 (ja) | 2014-03-12 |
KR101390612B1 (ko) | 2014-04-29 |
CN102712963B (zh) | 2014-08-06 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP5440203B2 (ja) | 高炭素熱延鋼板の製造方法 | |
EP2484791B1 (en) | Steel plate having low yield ratio, high strength and high uniform elongation and method for producing same | |
KR101594664B1 (ko) | 고탄소 박강판 및 그 제조 방법 | |
JP4650006B2 (ja) | 延性および伸びフランジ性に優れた高炭素熱延鋼板およびその製造方法 | |
JP5549640B2 (ja) | 高炭素薄鋼板およびその製造方法 | |
KR20190031278A (ko) | 고주파 담금질용 강 | |
JP6244701B2 (ja) | 焼入れ性および加工性に優れる高炭素熱延鋼板およびその製造方法 | |
TWI548755B (zh) | 氮化處理用鋼板及其製造方法 | |
JP5302840B2 (ja) | 伸びと伸びフランジ性のバランスに優れた高強度冷延鋼板 | |
KR20190028492A (ko) | 고주파 담금질용 강 | |
JP2017179596A (ja) | 高炭素鋼板およびその製造方法 | |
JP5521931B2 (ja) | 高周波焼入れ性優れた軟質中炭素鋼板 | |
WO2014002288A1 (ja) | 軟窒化処理用鋼板およびその製造方法 | |
KR20100076073A (ko) | 강판 및 그 제조 방법 | |
KR100959475B1 (ko) | 초고강도 철근의 제조방법 | |
JP4677883B2 (ja) | バウシンガー効果による降伏応力低下が小さい高強度ラインパイプ用鋼板およびその製造方法 | |
WO2014002287A1 (ja) | 軟窒化処理用鋼板およびその製造方法 | |
JP2007302937A (ja) | 焼入れ部材用鋼板、焼入れ部材及びその製造方法 | |
JP5614329B2 (ja) | 軟窒化処理用鋼板およびその製造方法 | |
JP5614330B2 (ja) | 軟窒化処理用鋼板およびその製造方法 | |
JP4319940B2 (ja) | 加工性と、焼入れ性、熱処理後の靭性の優れた高炭素鋼板 | |
JP2010111910A (ja) | 強度変動の小さい高強度冷延鋼板の製造方法 | |
JP2013127100A (ja) | 加工性に優れた高強度鋼板およびその製造方法 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 201080062133.1 Country of ref document: CN |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 10844009 Country of ref document: EP Kind code of ref document: A1 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 1624/KOLNP/2012 Country of ref document: IN |
|
WWE | Wipo information: entry into national phase |
Ref document number: 1201003649 Country of ref document: TH |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
ENP | Entry into the national phase |
Ref document number: 20127021207 Country of ref document: KR Kind code of ref document: A |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 10844009 Country of ref document: EP Kind code of ref document: A1 |