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    • 3. 发明公开
    • 고강도 강판 제조 방법 및 이를 이용한 고강도 강관
    • 高强度钢板及其制造方法
    • KR1020150049660A
    • 2015-05-08
    • KR1020130130483
    • 2013-10-30
    • 현대제철 주식회사
    • 한성경최종민김성주
    • C21D8/02C22C38/00C21D9/46C22C38/58B21B3/00
    • C22C38/58C21D8/0226C21D9/46C22C38/02C22C38/06
    • 합금성분조절및 공정조건의제어를통하여, QT(Quenching and Tempering) 열처리를실시하는것 없이가공성및 저온충격특성을향상시킬수 있는고강도강판및 그제조방법에대하여개시한다. 본발명에따른고강도강판은중량%로, C : 0.33 ~ 0.42%, Si : 0.1 ~ 0.3%, Mn : 1.0 ~ 1.8%, Al : 0.01 ~ 0.06, Cr : 0.2% 이하, Ni : 0.05 ~ 0.30%, Ca : 0.001 ~ 0.003%, N : 0.01% 이하및 나머지철(Fe)과기타불가피한불순물로이루어지며, 전기저항용접방식으로조관을실시한이후, 인장강도(TS) : 689MPa 이상, 항복강도(YS) : 379 ~ 552MPa, 연신율(EL) : 26% 이상및 0℃에서의충격에너지 : 40J 이상을갖는것을특징으로한다.
    • 公开了一种能够通过控制合金成分和工艺条件进行淬火回火(QT)热处理的能够提高机械加工性和低温冲击性能的高强度钢板及其制造方法。 根据本发明,高强度钢板包括:0.33-0.42重量%的C; 0.1-0.3重量%的Si; 1.0-1.8重量%的Mn; 0.01-0.06重量%的Al; 不超过0.2重量%的Cr; 0.05-0.30重量%的Ni; 0.001-0.003重量%的Ca; 不大于0.01重量%的N; Fe和不可避免的杂质作为其余部分。 在以电阻焊接方式进行管道生产之后,高强度钢板的拉伸强度(TS)不大于689Mpa; 屈服强度(YS)不大于379-552MPa; 伸长率(EL)不大于26%; 0℃下的冲击能不小于40J。
    • 4. 发明公开
    • 고강도 강판 및 그 제조방법
    • 高强度钢及其制造方法
    • KR1020150049659A
    • 2015-05-08
    • KR1020130130482
    • 2013-10-30
    • 현대제철 주식회사
    • 한성경박철봉김성주
    • C21D8/02C22C38/00C21D9/46C22C38/58B21B3/00
    • C22C38/58C21D8/0226C21D9/46C22C38/02C22C38/44C22C38/48C22C38/50
    • 원유수송을위한송유관용소재로사용되는유정관용강판개발에관한것으로서, 지하의높은압력에서도견딜수 있는고강도강판및 그제조방법에관한것이다. 본발명에따른고강도강판제조방법은 (a) 탄소(C) : 0.04 ~ 0.12 중량%, 실리콘(Si) : 0.1 ~ 0.4 중량%, 망간(Mn) : 1.5 ~ 2.0 중량%, 인(P) : 0.015 중량% 이하, 황(S) : 0.002 중량% 이하, 니오븀(Nb) : 0.04 ~ 0.1 중량%, 티타늄(Ti) : 0.001 ~ 0.025 중량%, 니켈(Ni) : 0.05 ~ 0.4 중량%, 크롬(Cr) : 0.001 ~ 0.35 중량% 및나머지철(Fe)과기타불가피한불순물로이루어진강 슬라브를 SRT(Slab reheating temperature) : 1200 ~ 1250℃로재가열하는단계; (b) 상기재가열된슬라브를 FDT(Finishing Delivery Temperature) : 730 ~ 850℃로열간압연하는단계; 및 (c) 상기열간압연된강을 CT(Coiling Temperature) : 400 ~ 500℃로냉각및 권취하는단계;를포함하는것을특징으로한다.
    • 本发明涉及用作用于输送原油的油管道的油管用钢板的公差的开发,更具体地,涉及能够承受高地下压力的高强度钢板及其制造方法 。 制造高强度钢板的方法包括:(a)对钢坯进行再加热的步骤包括:C:0.06-0.12重量%,Si:0.1-0.4重量%,Mn:1.5-2.0重量%,Mn:0.015重量% 或更少的P,0.002重量%以下的S,0.04-0.1重量%的Nb,0.001-0.025重量%的Ti,0.05-0.4重量%的Ni,0.001-0.35重量%的Cr,其余由 在1200-1250℃的板坯再加热温度(SRT)下,Fe和不可避免的杂质; (b)在730-850℃的最终输送温度(FDT)下热轧再热板坯的步骤; 和(c)在400-500℃的卷取温度下冷却该热轧钢的步骤,并且对冷却的热轧钢进行卷取。
    • 5. 发明公开
    • 강판
    • 钢板及其制造方法
    • KR1020140141223A
    • 2014-12-10
    • KR1020130062725
    • 2013-05-31
    • 현대제철 주식회사
    • 강춘구구남훈김성주박진성
    • C21D8/02C22C38/00C21D9/46B21B3/00
    • C21D8/0426C21D8/0436C21D8/0473C21D9/46C22C38/004C22C38/06C22C38/22C22C38/38
    • 내시효성, 성형성 및 연신율이 우수한 강판 및 그 제조 방법에 대하여 개시한다.
      본 발명에 따른 강판은 중량%로, 탄소(C) : 0.005~0.025%, 실리콘(Si) : 0.2% 이하, 망간(Mn) : 1.0~2.0%, 인(P) : 0.08% 이하, 황(S) : 0.01% 이하, 알루미늄(Al) : 0.2~2.0%, 질소(N) : 0.008% 이하를 포함하고, 0.3 ≤ [Cr]+0.3[Mo] ≤ 2.0([ ]는 성분의 중량%)이 되도록 크롬(Cr) 및 몰리브덴(Mo) 중 1종 이상을 포함하며, 나머지 철(Fe)과 불가피한 불순물로 이루어지고, 340MPa 이상의 인장강도(TS), 38% 이상의 연신율(El), 30MPa 이상의 소부경화능(BH) 및 1.2 이상의 r-value을 갖는 것을 특징으로 한다.
    • 公开了具有优异的耐应变时效性,成形性和伸长率的钢板及其制造方法。 根据本发明,钢板包括:碳(C)0.005-0.025重量%,硅(Si)0.2重量%以下,锰(Mn)1.0-2.0重量%,碳(Mn):0.08重量%以下,0.08重量% 磷(P),0.01重量%以下的硫(S),0.2〜2.0重量%的铝(Al),0.008重量%以下的氮(N),[Cr] +0.3 [Mo] 铬(Cr)和钼(Mo)[Cr] +0.3 [Mo] <= 2.0([]为组分的重量%)中的至少一种为组分的重量%,余量为铁(Fe)和 不可避免的杂质。 钢板具有等于或大于拉伸强度(TS),大于或等于38%伸长率(E1),大于或等于30MPa的烘烤硬化(BH)的340MPa,并且大于或等于 到1.2的r值。
    • 6. 发明授权
    • 법랑용 냉연강판 및 그 제조 방법
    • 用于ENAMEL的冷轧钢板及其制造方法
    • KR101467056B1
    • 2014-12-01
    • KR1020120122430
    • 2012-10-31
    • 현대제철 주식회사
    • 임지형이경호김성주
    • C21D8/02C22C38/00B21B3/00C21D9/46
    • 합금성분조절및 공정조건제어를통하여, 인장강도(TS) : 310 ~ 325MPa, 항복점(YP) : 245 ~ 265 및연신율(EL) : 42 ~ 45%를만족하는법랑용냉연강판및 그제조방법에대하여개시한다.본발명에따른법량용냉연강판제조방법은 (a) 중량%로, C : 0.0022 ~ 0.0030%, Si : 0.020 ~ 0.026%, Mn : 1.3 ~ 1.5%, P : 0% 초과 ~ 0.02% 이하, S : 0% 초과 ~ 0.02% 이하, Ti : 0.02 ~ 0.04%, Nb : 0.02 ~ 0.04%, Ca : 0.001 ~ 0.010%, Al : 0% 초과 ~ 0.01% 이하, N : 0% 초과 ~ 0.005% 이하, O : 0% 초과 ~ 0.005% 이하및 나머지철(Fe)과불가피한불순물로이루어지는슬라브판재를 FDT(Finishing Delivery Temperature) : 900 ~ 950℃조건으로마무리열간압연하는단계; (b) 상기열간압연된판재를 CT(Coiling Temperature) : 660 ~ 740℃까지냉각하여권취하는단계; (c) 상기권취된판재를언코일링하여조질압연하는단계; (d) 상기조질압연된판재를산세처리한후, 냉간압연하는단계; 및 (e) 상기냉간압연된판재를 600 ~ 700℃에서 10 ~ 20시간동안상자소둔열처리하는단계;를포함하는것을특징으로한다.
    • 9. 发明公开
    • 파이프용 열연강판 및 그 제조 방법
    • 用于管道的热轧钢板及其制造方法
    • KR1020140119897A
    • 2014-10-13
    • KR1020130033931
    • 2013-03-28
    • 현대제철 주식회사
    • 박철봉김형래한성경김성주
    • C21D8/02C22C38/00C21D9/46B21B3/00
    • C21D8/0226C21D2211/002C21D2211/005C22C38/02C22C38/44C22C38/48C22C38/50C22C38/58
    • Disclosed are a hot rolled steel sheet for a pipe capable of skipping a heat treatment process after producing a pipe and ensuring a 80 kg-class high strength material by adjusting an alloy component, and controlling a process condition; and a method of manufacturing the same. According to the present invention, the method of manufacturing the hot rolled steel sheet for a pipe comprises: a step of re-heating a slab comprising, by weight%, 0.06-0.12% of carbon (C), 0.15-0.4% of silicon (Si), 1.5-2.0% of manganese (Mn), 0.03% or less of phosphorus (P), 0.01% or less of sulfur (S), 0.01% or less of nitrogen (N), 0.05-0.12% of niobium (Nb), 0.01-0.05% of titanium (Ti), 0.1-0.5% of nickel (Ni), 0.2-0.3% of chrome (Cr), 0.1-0.5% of molybdenum (Mo), and the remainder consisting of Fe and inevitable impurities at 1180-1300°C which is a slab re-heating temperature (SRT); a step of hot rolling the re-heated slab at 780-850°C which is a finish delivery temperature (FDT); and a step of coiling the hot-rolled slab by cooling the hot-rolled slab at 400-580°C which is a coiling temperature (CT).
    • 公开了一种用于管道的热轧钢板,其能够在制造管道之后跳过热处理工艺,并通过调节合金成分确保80kg级的高强度材料,并控制工艺条件; 及其制造方法。 根据本发明,制造用于管材的热轧钢板的方法包括:重新加热板坯的步骤,其包含以重量%计的碳(C)的0.06-0.12%,硅(0.15%)的0.15-0.4% (Si),1.5-2.0%的锰(Mn),0.03%以下的磷(P),0.01%以下的硫(S),0.01%以下的氮(N),0.05〜0.12%的铌 (Nb),0.01-0.05%的钛(Ti),0.1-0.5%的镍(Ni),0.2-0.3%的铬(Cr),0.1-0.5%的钼(Mo),其余由Fe 和1180-1300℃的不可避免的杂质,即板坯再加热温度(SRT); 在780-850℃(即终轧温度(FDT))下热轧再热板坯的步骤; 以及在卷取温度(CT)的400-580℃下冷却热轧板坯来卷取热轧板坯的工序。
    • 10. 发明公开
    • 고탄소강 및 그 제조 방법
    • 高碳钢和制造碳钢的方法
    • KR1020140118314A
    • 2014-10-08
    • KR1020130033952
    • 2013-03-28
    • 현대제철 주식회사
    • 장진영김민수정준호천부현김성주윤일성
    • C21D8/00C22C38/00B21B1/26B21B3/00
    • C21D8/0226C21D1/18C21D2211/005C21D2211/009C22C38/02C22C38/04
    • Disclosed are high carbon steel capable of improving the yield of a final product by preventing deformation and preventing an edge part from being broken by adjusting an alloy component and controlling a process condition; and a method of manufacturing the same. According to the present invention, the method of manufacturing the carbon steel comprises: (a) a step of re-heating a steel slab comprising 0.85-1.10 wt% of carbon (C), 0.05-0.35 wt% of silicon (Si), 0.10-0.50 wt% of manganese (Mn), 0.03 wt% or less of phosphorus (P), 0.03 wt% or less of sulfur (S), 0.006 wt% or less of nitrogen (N), and the remainder consisting of Fe and inevitable impurities at 1150-1250°C which is a slab reheating temperature (SRT); (b) a step of finish hot rolling the re-heated steel at 720-790°C which is a finishing delivery temperature (FDT); and (c) a step of coiling the steel by cooling the finish hot rolled steel to 600-680°C which is a coiling temperature (CT).
    • 公开了能够通过防止变形而提高成品率的高碳钢,并且通过调整合金成分并控制工艺条件来防止边缘部分破裂; 及其制造方法。 根据本发明,制造碳钢的方法包括:(a)将包含0.85-1.10重量%的碳(C),0.05-0.35重量%的硅(Si), 0.10〜0.50重量%的锰(Mn),0.03重量%以下的磷(P),0.03重量%以下的硫(S),0.006重量%以下的氮(N),余量由Fe 和1150-1250℃的不可避免的杂质,即板坯再加热温度(SRT); (b)在720-790℃(即终轧输送温度(FDT))下对再热钢进行热轧的步骤; 和(c)通过将精热轧钢冷却至作为卷取温度(CT)的600-680℃来卷取钢的步骤。