公开(公告)号：KR102239279B1

公开(公告)日：2021-04-13

申请号：KR1020190045917A

申请日：2019-04-19

Applicant: 한국재료연구원 ,  재단법인 포항산업과학연구원

Inventor： 남궁정 ,  이창훈 ,  김경원 ,  박성준 ,  이영주 ,  우강주 ,  김주영

IPC: C22C38/38 ,  C21D8/02 ,  C22C38/06

CPC classification number: C22C38/38 ,  C21D8/0226 ,  C22C38/06 ,  C21D2211/001

Abstract: 저비중을 가지면서도 우수한 기계적 물성을 확보할 수 있는 초경량 오스테나이트계 스테인리스 강재 및 그 제조 방법에 대하여 개시한다.
본 발명에 따른 초경량 오스테나이트계 스테인리스 강재는 탄소(C) : 1.5 ~ 1.7 중량%, 망간(Mn) : 28 ~ 32 중량%, 알루미늄(Al) : 13.05 ~ 13.40 중량%, 크롬(Cr) : 4.5 ~ 5.5 중량% 및 나머지 철(Fe) 및 불가피한 불순물을 포함하며, 6.32g/㎤ 이하의 밀도를 갖는 것을 특징으로 한다.

公开(公告)号：KR1020040107158A

公开(公告)日：2004-12-20

申请号：KR1020030038049

申请日：2003-06-12

Applicant: 주식회사 세아창원특수강 ,  철강융합신기술연구조합 ,  재단법인 포항산업과학연구원 ,  주식회사 포스코

Inventor： 이기안 ,  박종혁 ,  김문철 ,  조봉현 ,  남궁정

IPC: C22C38/00

Abstract: PURPOSE: To provide a Fe-Ni-Co base Kovar alloy having low thermal expansion capable of improving hot workability and microstructure stability by adding a trace of boron(B) to the alloy. CONSTITUTION: The Fe-Ni-Co base alloy having low thermal expansion contains 28 to 30 wt.% of nickel(Ni), 15.5 to 18.5 wt.% of cobalt(Co), 0.05 to 0.5 wt.% of silicon(Si), 0.1 to 0.5 wt.% of manganese(Mn), and impurities of 0.006 wt.% or less of phosphorus(P), 0.05 wt.% or less of carbon(C), 0.15 wt.% or less of chromium(Cr), 0.10 wt.% or less of aluminum(Al), 0.4 wt.% or less of molybdenum(Mo) and 0.01 wt.% or less of sulfur(S), wherein the Fe-Ni-Co base alloy additionally contains 0.001 to 0.006 wt.% of boron(B).

Abstract translation: 目的：提供具有低热膨胀性能的Fe-Ni-Co基Kovar合金，其能够通过向合金中加入痕量的硼（B）来改善热加工性和微结构稳定性。 构成：热膨胀率低的Fe-Ni-Co系合金含有镍（Ni）28〜30重量％，钴（Co）15.5〜18.5重量％，硅（Si）0.05〜0.5重量％ ，0.1〜0.5重量％的锰（Mn），0.006重量％以下的磷（P），0.05重量％以下的碳（C），0.15重量％以下的铬（Cr ），0.10重量％以下的铝（Al），0.4重量％以下的钼（Mo）和0.01重量％以下的硫（S），其中Fe-Ni-Co基合金另外含有0.001 至0.006重量％的硼（B）。

公开(公告)号：KR100457235B1

公开(公告)日：2004-11-16

申请号：KR1020010065153

申请日：2001-10-22

Applicant: 재단법인 포항산업과학연구원 ,  철강융합신기술연구조합 ,  주식회사 세아창원특수강 ,  주식회사 포스코

Inventor： 남궁정 ,  김문철

IPC: B22D7/10

Abstract: PURPOSE: A casting method of large stainless steel ingot is provided to reduce casting defects inside the steel ingot considering solidification characteristics of the stainless steel ingot during the solidification process of the steel ingot after injecting molten steel into a steel ingot mold. CONSTITUTION: The casting method of large stainless steel ingot (2) comprises the processes of manufacturing a mixed heat generating and reserving material (8) by mixing metal aluminum powder that is a heat generating source with porous thermal insulating material (9) as a heat generating and reserving material supplied onto the surface of a steel ingot hot-top (3) after filling molten steel into mold when casting a large stainless steel ingot; coating the manufactured mixed heat generating and reserving material on the surface of the molten steel filled into the mold (1); coating the porous thermal insulating material (9) on the mixed heat generating and reserving material; coating the mixed heat generating and reserving material (8) on the porous thermal insulating material; and coating the porous thermal insulating material on the mixed heat generating and reserving material again so that heat generating and reserving effects of the mixed heat generating and reserving material are extended.

Abstract translation: 目的：考虑到钢锭在将钢水注入钢锭模后凝固过程中不锈钢锭的凝固特性，提供了一种大型不锈钢锭的铸造方法，以减少钢锭内部的铸造缺陷。 构成：大型不锈钢锭（2）的铸造方法包括通过将作为发热源的金属铝粉与多孔绝热材料（9）混合作为热量来制造混合发热和储存材料（8）的过程 当铸造大型不锈钢锭时，在将钢水充入铸模之后，产生并储存供应到钢锭热顶部（3）的表面上的材料; 将所制造的混合发热保存材料涂覆在填充到模具（1）中的钢水表面上; 将多孔绝热材料（9）涂覆在混合发热和储存材料上; 将混合发热保存材料（8）涂布在多孔绝热材料上; 再将多孔绝热材料涂布在混合发热保存材料上，使混合发热保存材料的发热保存效果延长。

公开(公告)号：KR100340596B1

公开(公告)日：2002-06-20

申请号：KR1019990050535

申请日：1999-11-15

Applicant: 철강융합신기술연구조합 ,  재단법인 포항산업과학연구원

Inventor： 송진화 ,  남궁정 ,  김관중 ,  이봉전

IPC: C21D8/06

Abstract: 본발명은고Cr-Ni계스테인레스강열간압연선재의제조방법에관한것이며, 그목적하는바는내식성과내열성을향상시키기위해다량의 Cr과 Ni성분을합금화시킨스테인레스강의열간압연선재제조시 2차수냉상자의냉각수량을조정해서레잉헤드의입구와출구에서의선재표면온도를적절히제어하여선재표면의경도를증대시킴으로서, 레잉헤드와선재가고속으로마찰되면서발생되는표면의스크래치결함을저감할수 있도록한 고Cr-Ni계스테인레스강선재의제조방법을제공하는데있다상기목적을달성하기위한본 발명은고Cr-Ni계스테인레스강열간압연선재를레잉헤드가포함된레잉식권취설비를이용하여제조하는방법에있어서, 상기레잉헤드입구에서의선재표면온도를 690-840℃로제어하고, 상기레잉헤드출구에서의선재표면온도를 730-940℃로제어하는것을특징으로하는고Cr-Ni계스테인레스강열간압연선재의제조방법에관한것을그 요지로한다.

公开(公告)号：KR1020010055784A

公开(公告)日：2001-07-04

申请号：KR1019990057094

申请日：1999-12-13

Applicant: 재단법인 포항산업과학연구원 ,  철강융합신기술연구조합

Inventor： 남궁정 ,  김문철 ,  도병무

IPC: B22D7/00

CPC classification number: B22D7/10 ,  B22D7/12

Abstract: PURPOSE: A method for casting a large scale steel ingot is provided to obtain a casting product of a large scale steel ingot having a target quality by applying a hot top to the large scale steel ingot and an insulating band to the upper part of the ingot, or a chill block or cooling apparatus to the lower part of a mold so as to control the solidification model inside the large scale steel ingot. CONSTITUTION: The method for casting a large scale steel ingot comprises the process of controlling a solidification model during solidification of a steel ingot by installing an insulating band (10) manufactured of a material having a heat conductivity of 1 W/m°K or less at the feeder part (2) and the upper part of a mold (1), thereby reducing casting defects. The method comprises the process of controlling a solidification model during solidification of a steel ingot by installing a chill block (20) manufactured of a material having a heat conductivity of 40 to 400 W/m°K at the lower part of a mold, thereby reducing casting defects. The method comprises the process of controlling a solidification model during solidification of a steel ingot by installing an insulating band manufactured of a material having a heat conductivity of 1 W/m°K or less at the feeder part and the upper part of a mold and installing a chill block manufactured of a material having a heat conductivity of 40 to 400 W/m°K at the lower part of a mold, thereby reducing casting defects.

Abstract translation: 目的：提供一种用于铸造大型钢锭的方法，以通过向大型钢锭施加热顶和将绝热带施加到锭的上部来获得具有目标质量的大型钢锭的铸造产品 ，或冷却装置或冷却装置到模具的下部，以便控制大型钢锭内的凝固模型。 构成：用于铸造大型钢锭的方法包括通过安装由导热率为1W / m°K以下的材料制成的绝缘带（10）来控制钢锭凝固期间的凝固模型的过程 在进料器部分（2）和模具（1）的上部，从而减少铸造缺陷。 该方法包括通过在模具的下部安装由导热率为40〜400W / m·K的材料制成的冷却块（20），在钢锭固化期间控制凝固模型的工序，由此 减少铸造缺陷。 该方法包括在钢锭固化期间通过在模具的进料部分和上部安装导热率为1W / m·K以下的材料制造的绝缘带来控制钢锭的凝固过程， 在模具的下部安装由导热率为40〜400W / m·K的材料制成的冷却块，从而减少铸造缺陷。

公开(公告)号：KR1020110076572A

公开(公告)日：2011-07-06

申请号：KR1020090133317

申请日：2009-12-29

Applicant: 주식회사 포스코 ,  재단법인 포항산업과학연구원 ,  철강융합신기술연구조합 ,  주식회사 세아창원특수강

Inventor： 김용찬 ,  남궁정 ,  김문철 ,  도병무 ,  박종혁

IPC: C21D6/00 ,  C22C38/40

CPC classification number: C21D6/004 ,  C21D1/26 ,  C21D6/005 ,  C21D6/008 ,  C22C38/42 ,  C22C38/44 ,  C22C38/54 ,  C22C38/58

Abstract: PURPOSE: A super high strength and high corrosion resistant stainless steel alloy and a manufacturing method thereof are provided to ensure high strength of over 156kg/mm^2 by changing a structure and mechanical properties depending on added elements, a forging condition and a heat treatment condition. CONSTITUTION: Stainless alloy steel ingot consists of 0.001-0.1% of C, 10-25% of Cr, 5-20% of Ni, 0.1-5% of Al, 0.1-5% of Si, 0.1-5% of Mn, 0.1-5% of Mo, 0.01-3% of B, 0.1-5% of Cu, Fe and other inevitable impurities. The stainless alloy steel ingot consists of one or more of one of 0.01-5% of W, 0.01-5% of V, 0.01-5% of Ti and 0.01-5% of Nb. The steel ingot is hot-plasticized, is homogenized at a temperature of 900-1150°C, is solution-treated at a temperature of 700-1000°C and is precipitation-hardened at a temperature of 500-600°C.

Abstract translation: 目的：提供超高强度，高耐蚀不锈钢合金及其制造方法，通过根据添加元素，锻造条件和热处理改变结构和机械性能，确保超过156kg / mm ^ 2的高强度 条件。 构成：不锈钢合金钢锭由C：0.001-0.1％，Cr：10-25％，Ni：5-20％，Al：0.1-5％，Si：0.1-5％，Mn：0.1-5％ Mo的0.1-5％，B的0.01-3％，Cu，Fe等不可避免的杂质为0.1-5％。 不锈钢合金钢锭由W的0.01-5％，V的0.01-5％，Ti的0.01-5％，Nb的0.01-5％组成。 将钢锭热塑化，在900-1150℃的温度下均化，在700-1000℃的温度下进行溶液处理，并在500-600℃的温度下进行沉淀硬化。

公开(公告)号：KR1020110076571A

公开(公告)日：2011-07-06

申请号：KR1020090133316

申请日：2009-12-29

Applicant: 주식회사 포스코 ,  주식회사 세아창원특수강 ,  철강융합신기술연구조합 ,  재단법인 포항산업과학연구원

Inventor： 남궁정 ,  김용찬 ,  김문철

IPC: B22D7/04 ,  B22D7/06

Abstract: PURPOSE: A method of casting large steel ingot and a casting mold are provided to reduce coagulation defect in a cast product by improving coagulation model of steel ingot without additional facility or energy consumption. CONSTITUTION: The upper and lower parts of a mold have different heat radiating conditions when ingot steel is cooled. The lower part of the mold is more quickly cooled than the upper part of the mold according to the heat radiating condition. The lower part of the mold is super-cooled more than the upper part of the mold when the ingot steel is cooled. An area of super-cooling is within a range of 20-90% from the lower end of the mold on the height of the mold. The upper part of the mold is insulated when the ingot steel is cooled by a cooling part(12). An area of insulating is within a range of 10-80% from the upper end of the mold on the height of the mold.

Abstract translation: 目的：提供铸造大型钢锭和铸模的方法，通过提高钢锭的凝固模型，无需额外的设备或能量消耗，减少铸造产品的凝固缺陷。 构成：当铸锭冷却时，模具的上部和下部具有不同的散热条件。 根据散热条件，模具的下部比模具的上部更快地冷却。 当钢锭冷却时，模具的下部超过模具的上部。 在模具的高度上，超冷却区域在模具下端的20-90％的范围内。 当钢锭被冷却部件（12）冷却时，模具的上部被绝缘。 在模具的高度上，绝缘区域在模具上端的10-80％的范围内。

公开(公告)号：KR1020010017222A

公开(公告)日：2001-03-05

申请号：KR1019990032610

申请日：1999-08-09

Applicant: 재단법인 포항산업과학연구원 ,  철강융합신기술연구조합

Inventor： 남궁정 ,  김문철

IPC: B22D7/10

CPC classification number: B22D7/10

Abstract: PURPOSE: A method for casting a large steel mass by using hot top is provided to improve the quality of casting by accurately adjusting a temperature of a hot top part. CONSTITUTION: An induction heating coil(2) is installed on an upper hot top part(1) of a mold of a large steel mass. A fireproof tape and powder are applied to the induction heating coil to insulate it. An entire heating time and an intermittent heating time of the induction heating coil is adjusted according to heating condition set by an actual casting or a simulation casting using a computer. After melting steel is filled in the mold, the induction heating coil is heated so that a temperature of the melting steel in the hot top part is maintained until the coagulation process of the melting steel is completed. In this way, a nonmetallic insertion possible to exist in the melting steel is separated, and a defect such as a contraction hole produced by the removal of gas is prevented.

Abstract translation: 目的：提供通过使用热顶铸造大型钢块的方法，通过精确地调节热顶部的温度来提高铸造质量。 构成：感应加热线圈（2）安装在大型钢质模具的上部热顶部（1）上。 将防火胶带和粉末施加到感应加热线圈以使其绝缘。 根据通过使用计算机的实际铸造或模拟铸造设定的加热条件来调整感应加热线圈的整个加热时间和间歇加热时间。 在将钢填充到模具中之后，感应加热线圈被加热，以保持热顶部的熔融钢的温度，直到熔融钢的凝固过程完成。 以这种方式，可能存在于熔融钢中的非金属插入被分离，并且防止了通过除去气体产生的收缩孔等缺陷。

公开(公告)号：KR101858705B1

公开(公告)日：2018-05-16

申请号：KR1020160176121

申请日：2016-12-21

Applicant: 주식회사 포스코 ,  재단법인 포항산업과학연구원 ,  (주)청하중공업 ,  철강융합신기술연구조합

Inventor： 남궁정 ,  이영주 ,  양충진 ,  도병무 ,  우강주 ,  권형택 ,  이창형

IPC: B22D19/08 ,  F27B21/02 ,  C22C38/18 ,  C22C38/40

CPC classification number: B22D19/08 ,  C22C38/18 ,  C22C38/40 ,  F27B21/02

Abstract: 본발명의일 측면에따른수명이향상된그레이트바의제조방법은주형에고크롬용탕을주입하여주물을주조하는방법에있어서, 주형의내부벽면에고형물을위치시키는단계; 및상기주형에고크롬용탕을주입하여상기고형물이주물표면에융착되도록그레이트바를주조하는단계;를포함한다.

公开(公告)号：KR100525840B1

公开(公告)日：2005-11-02

申请号：KR1020030038049

申请日：2003-06-12

Applicant: 주식회사 세아창원특수강 ,  철강융합신기술연구조합 ,  재단법인 포항산업과학연구원 ,  주식회사 포스코

Inventor： 이기안 ,  박종혁 ,  김문철 ,  조봉현 ,  남궁정

IPC: C22C38/00

Abstract: 개시된 본 발명은 미량의 붕소(B)를 첨가한 Fe-Ni-Co계 저열팽창성 코바 합금에 관한 것으로, 불순물 원소의 결정립계로의 편석을 저지하는 동시에 이들 원소와의 붕화물을 형성하고 결정립계 및 다른 결함부에 우선적으로 응집하여 결정의 핵이 되며, 결정립을 미세화시키고 입계 취화를 방지하여 합금의 열간 가공성과 함께 미세조직 안정성을 향상시키기 위한 것이다.
이를 위하여 본 발명은 니켈 28∼30 중량%와 코발트 15.5 ~ 18.5 중량%를 기본으로 하여; 0.05 ~ 0.5 중량%의 규소(Si)와 0.1 ~ 0.5 중량%의 망간(Mn)을 함유하고; 불순물로서 0.006% 이하의 인, 0.05 중량% 이하의 탄소, 0.15 중량% 이하의 크롬, 0.10 중량% 이하의 알루미늄, 0.4 중량% 이하의 몰리브덴을 함유하며, 특히 0.01 중량% 이하의 황을 함유하며; 0.001∼0.006 중량%의 붕소를 함유하는 Fe-Ni-Co계 저열팽창성 합금을 제공함으로써, 열팽창 특성을 저하시키지 않고 열간 가공성을 개선할 수 있어 상기 코바 합금의 제조시 표면 결함을 줄일 수 있고 합금에서 중요하게 요구되는 미세조직의 안정성도 향상시키는 이점을 얻을 수 있게 한다.