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71. 发明公开

KR1020130023727A 홀확장 성형 방법 및 이를 위한 홀확장 성형 장치 有权
标题翻译：孔扩展方法和孔扩展装置
公开(公告)号：KR1020130023727A
公开(公告)日：2013-03-08
申请号：KR1020110086681
申请日：2011-08-29
申请人： 현대제철 주식회사
发明人： 고강희 , 이승하
IPC分类号： B21D31/00 , C21D7/13 , B21D37/16
CPC分类号： B21D31/00 , B21D37/16 , B21D39/08 , C21D2211/008
摘要： PURPOSE: A method and an apparatus for expanding a hole are provided to improve productivity by rapidly and partially heating a part where the hole is processed by induction heating. CONSTITUTION: A method for expanding a hole expands the hole in a state where a part of a target processing material containing a martensite structure is rapidly and partially heated at a tempering temperature. The tempering temperature is within 500-600 deg. C.. The rapid heating is implemented within 2-10 seconds. The target processing material is a DP(Dual Phase) steel containing a ferrite structure and the martensite structure.
摘要翻译：目的：提供一种用于扩大孔的方法和装置，以通过快速和部分地加热通过感应加热处理孔的部分来提高生产率。构成：扩孔的方法在包含马氏体组织的目标处理材料的一部分在回火温度下快速并部分加热的状态下扩大孔。回火温度在500-600度之内。快速加热在2-10秒内完成。目标处理材料是含有铁素体结构和马氏体结构的DP（双相）钢。

72. 发明公开

KR1020130013563A 열연강판 제조방법 无效
标题翻译：制造热轧钢板的方法
公开(公告)号：KR1020130013563A
公开(公告)日：2013-02-06
申请号：KR1020110075274
申请日：2011-07-28
申请人： 현대제철 주식회사
发明人： 이승하 , 고강희 , 도형협
IPC分类号： C21D8/02 , C22C38/00 , C21D9/46 , B21B3/02
CPC分类号： C21D8/0226 , C21D8/0263 , C21D9/46 , C22C38/001 , C22C38/04 , C22C38/06 , C22C38/28 , C22C38/32
摘要： PURPOSE: A hot-rolled steel sheet manufacturing method is provided to obtain favorable welding using a slab including a low C.E(Carbon Equivalent). CONSTITUTION: A hot-rolled steel sheet manufacturing method is as follows. A slab plate comprises 0.19-0.27 wt% of C, 0.50 wt% or less of Si, 1.00-1.40 wt% of Mn, 0.020 wt% or less of P, 0.010 wt% or less of S, 0.010-0.050 wt% or less of Al, 0.010-0.050 wt% or less of Ti, 0.10-0.40 wt% or less of Cr, 0.0080 wt% or less of N, 0.0010-0.0050 wt% of B, and 0.43-0.50 wt% of C.E. A slab plate is hot-rolled(S100). The hot-rolled plate is cooled(S102). The plate is reeled into a coil shape at a CT(Coiling Temperature) of 520-560°C. [Reference numerals] (AA) Start; (BB) End; (S100) Hot rolling; (S101) Reheating; (S102) Cooling; (S200) Winding(520-560°C)
摘要翻译：目的：提供一种使用含有低C.E（碳当量）的板坯获得良好焊接的热轧钢板制造方法。构成：热轧钢板的制造方法如下。板坯包含：0.19-0.27重量％的C，0.50重量％或更少的Si，1.00-1.40重量％的Mn，0.020重量％或更少的P，0.010重量％或更少的S，0.010-0.050重量％或较少的Al，0.010-0.050wt％或更少的Ti，0.10-0.40wt％或更少的Cr，0.0080wt％或更少的N，0.0010-0.0050wt％的B和0.43-0.50wt％的CEA板板被热轧（S100）。将热轧板冷却（S102）。在520-560℃的CT（卷取温度）下将板卷绕成线圈形状。（附图标记）（AA）开始; （BB）结束; （S100）热轧; （S101）再加热; （S102）冷却; （S200）绕组（520-560°C）

73. 发明公开

KR1020130002406A 짱구 저감 냉각방법 失效
标题翻译：冷却方式减少不良线圈的发生
公开(公告)号：KR1020130002406A
公开(公告)日：2013-01-08
申请号：KR1020110063359
申请日：2011-06-29
申请人： 현대제철 주식회사
发明人： 송혁진 , 김양곤 , 김형진 , 이승하 , 박영국 , 임종협
IPC分类号： C21D9/52 , B21B45/02
CPC分类号： C21D9/52 , B21B45/0224
摘要： PURPOSE: A cooling method for reducing a zzang-gu is provided to reduce the occurrence rate of the zzang-gu from the usual 20% to less than about 5%, thereby resolving a yard pile problem and the coiling workability due to the occurrence of the zzang-gu. CONSTITUTION: A cooling method for reducing a zzang-gu comprises: a first step of cooling a hot rolled steel sheet from the initial temperature of 800 to 900°C to the temperature which is 10 to 30°C higher than the final temperature of 600 to 620°C; and a second step of maintaining the temperature of the hot rolled steel sheet, which passed through the first step, so that the temperature reaches the final temperature without cooling. The first step is implemented by water cooling, and cooling velocity is 80°C/s to 120°C. The time ratio of the first step to the second step is 1:1 to 1:3. The time of the second step is secured to be equal to or higher than that of the first step in order to be effective in preventing a transformation of heat generation by phase transformation after coiling. The productivity is worsened if the time of the second step is more than three times that of the time of the first step. [Reference numerals] (AA) Step cooling; (BB) Zzang-gu reduction cooling of the present invention; (CC) Temperature(°C); (DD) Time(sec)
摘要翻译：目的：提供一种降低紫外光的冷却方法，将紫外光的发生率从通常的20％降低到小于5％左右，从而解决了堆场问题，由于发生了卷绕作业性 zzang-gu 构成：用于还原锌锌的冷却方法包括：将热轧钢板从初始温度800至900℃冷却至高于最终温度600℃的温度为10至30℃的第一步骤至620℃; 以及通过第一步骤的维持热轧钢板的温度使得温度达到最终温度而不冷却的第二步骤。第一步是通过水冷实现，冷却速度为80℃/ s至120℃。第一步骤与第二步骤的时间比为1:1至1:3。确保第二步骤的时间等于或高于第一步骤的时间，以便有效地防止卷取后的相变的发热转变。如果第二步的时间是第一步的时间的三倍以上，则生产率会恶化。（附图标记）（AA）步骤冷却; （BB）本发明的Zzang-gu还原冷却; （CC）温度（℃）; （DD）时间（秒）

74. 发明公开

KR1020120132836A 핫 스탬핑 성형체 및 그 제조 방법 无效
标题翻译：热冲压成型产品及其制造方法
公开(公告)号：KR1020120132836A
公开(公告)日：2012-12-10
申请号：KR1020110051196
申请日：2011-05-30
申请人： 현대제철 주식회사
发明人： 이승하 , 도형협 , 박영국 , 김성주
IPC分类号： B21D22/02 , C21D7/13 , B21D37/16 , B23K31/00
摘要： PURPOSE: A hot stamping molded product and a manufacturing method thereof are provided to manufacture vehicle parts with partially different strength by butt-welding different materials using a TWB method and a hot stamping method at the same time. CONSTITUTION: A method for manufacturing a hot stamping molded product(100) comprises the steps of: preparing blanks comprising a high-strength part(110), a high-tension part(130), and a weld part; connecting the blanks to each other by welding; selectively heat-treating the high-strength part of the blanks; molding the heat-treated blanks with a press mold to obtain a molded body; and cooling the press mold in a closed state to rapidly cool the molded body. The high-strength part of the blanks is plated to prevent the formation of an oxidized scale layer during heat treatment.
摘要翻译：目的：提供热冲压成型品及其制造方法，以同时使用TWB法和热冲压法对不同材料进行对接焊接，制造具有不同强度的车辆部件。构成：制造热冲压模制品（100）的方法包括以下步骤：制备包括高强度部分（110），高压部分（130）和焊接部分的坯料; 通过焊接将坯料彼此连接; 选择性地热处理坯料的高强度部分; 用压模成型热处理坯料，得到成型体; 并将压模冷却至关闭状态，以快速冷却成型体。电镀高强度部分的坯料，以防止在热处理过程中形成氧化鳞片层。

75. 发明授权

KR101175413B1 크랙 저감을 위한 열연 강판용 슬라브의 연속 주조법 失效
标题翻译：轧制钢产品的连续铸造方法
公开(公告)号：KR101175413B1
公开(公告)日：2012-08-20
申请号：KR1020090103204
申请日：2009-10-29
申请人： 현대제철 주식회사
发明人： 이승하 , 김성주 , 도형협
IPC分类号： B22D11/00 , C22C38/04
摘要： 이에따르면본 발명은연속주조시직선화온도구간에서슬라브의크랙발생을억제하여제품의품질을향상시킬수 있는유용한효과를갖는다.

76. 发明公开

KR1020120032982A 가공성이 우수한 하이드로포밍용 고강도 열연강판 및 그 제조 방법 有权
标题翻译：用于高效加工的高强度热轧钢和制造热轧钢的方法
公开(公告)号：KR1020120032982A
公开(公告)日：2012-04-06
申请号：KR1020100094562
申请日：2010-09-29
申请人： 현대제철 주식회사
发明人： 임현규 , 이승하 , 김성주
IPC分类号： C21D8/02 , C21D9/46 , C22C38/00 , C22C38/38
CPC分类号： C21D8/0226 , C21D9/46 , C21D2211/005 , C21D2211/009 , C22C38/02 , C22C38/04 , C22C38/18
摘要： PURPOSE: A high-strength hot rolled steel plate with superior workability for hydroforming and a manufacturing method thereof are provided to secure a hot rolled steel plate with a tensile strength of 540MPa or greater and an elongation ratio of 28% or greater. CONSTITUTION: A method for manufacturing a high-strength hot rolled steel plate with superior workability for hydroforming comprises the steps of: reheating a slab to a SRT(Slab Reheating Temperature) of 1150-1250°C, hot-rolling the slab to an FDT(Finishing Delivery Temperature) of 850-890°C(S110), and cooling and coiling the hot-rolled plate at a CT(Coiling Temperature) of 640-660°C(S120). The slab comprises carbon of 0.2-0.24 weight%, silicon of 0.15-0.25 weight%, manganese of 1.3-1.5 weight%, chrome of 0.05-0.2 weight%, phosphorus of 0.018weight% or less, sulfur of 0.005 weight% or less, and iron and inevitable impurities of the remaining amount.
摘要翻译：目的：提供一种具有优异的液压成形加工性的高强度热轧钢板及其制造方法，以确保拉伸强度为540MPa以上，伸长率为28％以上的热轧钢板。构成：用于制造液压成形加工性优异的高强度热轧钢板的方法包括以下步骤：将板坯再加热至1150-1250℃的SRT（板坯再加热温度），将板坯热轧成FDT （整理输送温度）为850-890℃（S110），并且在640-660℃的CT（卷取温度）下冷却和卷取热轧板（S120）。板坯包含0.2-0.24重量％的碳，0.15-0.25重量％的硅，1.3-1.5重量％的锰，0.05-0.2重量％的铬，0.018重量％以下的磷，0.005重量％以下的硫，铁和不可避免的杂质的剩余量。

77. 发明公开

KR1020120032974A 열연 코일의 변형 방지를 위한 지지 구조물 및 그 삽입 장치 有权
标题翻译：插入内胆线圈以防止塌陷的装置及其插入装置
公开(公告)号：KR1020120032974A
公开(公告)日：2012-04-06
申请号：KR1020100094554
申请日：2010-09-29
申请人： 현대제철 주식회사
发明人： 김양곤 , 이승하 , 임현규
IPC分类号： B21C47/30 , B21C47/24 , B21D1/08
摘要： PURPOSE: A supporting structure for preventing the deformation of a hot rolled coil and an insertion device for the same are provided to prevent a hot rolled coil deformed before cooled enough by employing a method for inserting a supporting structure into the hot rolled coil. CONSTITUTION: A supporting structure for preventing the deformation of a hot rolled coil comprises a contact supporting part, a screw shaft, and a link part. The contact supporting part is assembled out of arc-shaped sectional members and inserted into a hot rolled coil in order to contact and support the interior surface of the hot rolled coil(C). The screw shaft is arranged lengthwise along the internal center of the contact supporting part and manipulated by rotation. The link part is arranged by being connected between the contact supporting part and the screw shaft in order to extend or reduce the diameter of the contact supporting part according to the rotating direction of the screw shaft.
摘要翻译：目的：提供一种用于防止热轧卷材和其插入装置的变形的支撑结构，以通过采用将支撑结构插入到热轧卷材中的方法来防止热轧板卷变形，然后再进行冷却。构成：用于防止热轧线圈变形的支撑结构包括接触支撑部分，螺杆轴和连杆部分。接触支撑部件由弧形截面部件组装并插入热轧卷材中，以便接触和支撑热轧卷材（C）的内表面。螺杆轴沿着接触支撑部分的内部中心纵向设置并通过旋转来操纵。通过连接在接触支撑部分和螺杆轴之间来设置连杆部分，以便根据螺杆轴的旋转方向来延伸或减小接触支撑部分的直径。

78. 发明授权

KR101100560B1 연성이 우수한 열처리 경화형 강판의 제조방법 有权
标题翻译：具有优良延展性的淬火热轧钢板的制造方法
公开(公告)号：KR101100560B1
公开(公告)日：2011-12-29
申请号：KR1020080106089
申请日：2008-10-28
申请人： 현대제철 주식회사
发明人： 이승하 , 김택준 , 도형협
IPC分类号： C22C38/04 , C21D8/02
摘要： 본 발명은 연성이 우수한 열처리 경화형 강판의 제조방법에 관한 것이다. 본 발명은 탄소(C) 0.19~0.40wt%, 망간(Mn) 0.5~2.5wt%, 크롬(Cr) 0.1~0.5wt%, 보론(B) 0.0015~0.0040wt%, 실리콘(Si) 0.01~0.5wt%, 인(P) 0 초과 0.05wt% 이하, 황(S) 0 초과 0.05wt% 이하, 알루미늄(Sol.Al) 0 초과 0.03wt% 이하에 니켈(Ni) 0.01~2wt%, 니오븀(Nb) 0.01~0.10wt%, 구리(Cu) 0.01~1wt%, 몰리브덴(Mo) 0.01~0.20wt% 중 1종 또는 2종 이상이 기본조성으로 함유되고, 나머지 잔부가 철(Fe)과 강의 제조시 불가피하게 함유되는 원소로 이루어진다.
본 발명의 열처리 경화형 강판은 열간 프레스 가공 후 도장 건조과정에서 건조조건 제어를 통해 항복강도 및 연신율을 향상시킨다. 이러한 열처리 경화형 강판은 기존의 열간 프레스 제품에 비해 우수한 항복강도 및 인성이 확보되므로 자동차의 프레임이나 충격부재에 안정적으로 사용될 수 있는 이점이 있다.
열처리 경화형 강판, 저온 충격인성, 연성

79. 发明授权

KR101062036B1 용접 및 충격특성이 우수한 열처리 경화형 강판 및 그 제조방법 有权
标题翻译：热处理固化型钢板在焊接和冲击性能方面表现优异，其制造方法
公开(公告)号：KR101062036B1
公开(公告)日：2011-09-02
申请号：KR1020080106083
申请日：2008-10-28
申请人： 현대제철 주식회사
发明人： 김택준 , 이승하
IPC分类号： C22C38/04 , C21D8/02
摘要： 본 발명은 합금원소의 제어를 통해 열간 프레스 강판의 용접 및 충격특성을 향상시킬 수 있도록 한 용접 및 충격특성이 우수한 열처리 경화형 강판 및 그 제조방법에 관한 것이다.
본 발명은 중량 %로, 탄소(C): 0.15~0.40%, 실리콘(Si): 0.03~0.30%, 망간(Mn): 1.0~2.0%, 보론(B) : 0.0005~0.004%를 기본 성분으로 하며, 황(S): 0.003% 이하, 인(P): 0.012% 이하, 칼슘(Ca) : 0.001~0.005%, 니오븀(Nb) : 0.005~0.05%, 지르코늄(Zr):0.005~0.1%, 코발트(Co) : 0.0005~0.5%를 함유하고 나머지 잔부가 Fe 및 불가피적으로 포함되는 불순물로 조성된 강판을 가열로에서 가열한 후에, 가열된 강판을 프레스 금형에서 600~800℃의 온도 범위내에서 프레스 성형하는 것이다.
이에 따르면 본 발명은 Mn/Si의 비율을 조정하여 용접 특성을 제어하고, Ca/S의 비율을 조정하여 충격특성을 제어하도록 함과 아울러 미량 합금 원소의 첨가량을 조절함으로써, 용접 및 충격 특성이 우수한 열간 프레스 강판을 제조할 수 있는 유용한 효과를 갖는다.
摘要翻译：本发明涉及一种焊接热处理和冲击性能是优异的固化的钢板并通过合金元素的控制以提高焊缝和热压钢板的冲击性能的制造方法。

80. 发明公开

KR1020110087952A 45ｋｇｆ급 신장플랜지성이 우수한 고강도 열연강재의 제조 방법 无效
标题翻译：制造具有优异拉伸法兰性的45个KILOGRAM-FORCE等级的高强度热轧钢的方法
公开(公告)号：KR1020110087952A
公开(公告)日：2011-08-03
申请号：KR1020100007628
申请日：2010-01-27
申请人： 현대제철 주식회사
发明人： 도형협 , 이승하 , 한성경
IPC分类号： C21D8/02 , C22C38/04 , C21D9/00
CPC分类号： C21D8/02 , C21D8/0226 , C21D2211/005 , C21D2211/009 , C22C38/001 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/12
摘要： PURPOSE: A method for manufacturing high strength hot-rolled steel of 45 kilogram-force grade with excellent stretch flangeability is provided to reduce the cooling process because coiling is implemented at a temperature higher than the bainite transformation temperature. CONSTITUTION: A method for manufacturing high strength hot-rolled steel of 45 kilogram-force grade with excellent stretch flangeability is as follows. A steel slab is hot rolled, wherein the steel slab includes C: 0.035~0.045weight%, Si: 0.18~0.22weight%, Mn: 1.5~1.7weight%, P : 0.016~0.024weight%, S : 0.003weight% or less, Al : 0.025~0.035weight%, N : 60ppm or less, and Fe and inevitable impurities of the remaining amount(S110). The hot-rolled steel product is cooled to a cooling end temperature which comes under a pearlite temperature range higher than the bainitic transformation temperature of the steel product(S120). The cooled steel product is rolled at the cooling end temperature ±5°C(S130).
摘要翻译：目的：提供45kg强度等级的高强度热轧钢，具有优异的拉伸凸缘性的方法，以减少冷却过程，因为在高于贝氏体转变温度的温度下进行卷取。构成：具有优良拉伸凸缘性的45千克力级的高强度热轧钢的制造方法如下。钢坯是热轧的，其中钢板包括C：0.035〜0.045重量％，Si：0.18〜0.22重量％，Mn：1.5〜1.7重量％，P：0.016〜0.024重量％，S：0.003重量％ Al：0.025〜0.035重量％，N：60ppm以下，Fe和剩余量的不可避免的杂质（S110）。将该热轧钢产品冷却至高于钢产品的贝氏体转变温度的珠光体温度范围的冷却终止温度（S120）。冷却的钢制品在冷却结束温度±5℃下滚动（S130）。

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