公开(公告)号：KR100406427B1

公开(公告)日：2003-11-19

申请号：KR1020010016811

申请日：2001-03-30

Applicant: 철강융합신기술연구조합 ,  재단법인 포항산업과학연구원

Inventor： 정재영 ,  마봉열

IPC: C22C38/20

Abstract: PURPOSE: To manufacture a free machining austenitic stainless steel having low nitrogen contents by inhibiting precipitation of Cr-nitride at phase transition between austenite and MnS or austenite and ferrite. CONSTITUTION: The free machining austenitic stainless steel having low nitrogen contents comprises C 0.15 wt.% or less, Si 1.0 wt.% or less, Mn 1.0-3.5 wt.%, S 0.15-0.40 wt.%, Cr 16-19 wt.%, Ni 8-14 wt.%, Mo 2.5 wt.% or less, Cu 4 wt.% or less, N 0.015 wt.% or less, a balance of Fe and other inevitable impurities, wherein Cr/N ratio is 1067 to 19000, Mn/S ratio is higher than 4.5, and oxygen content in the free machining austenitic stainless steel is 0.007 to 0.11 wt.%.

Abstract translation: 目的：通过在奥氏体和MnS或奥氏体和铁素体之间的相变过程中抑制Cr氮化物的沉淀来制造具有低氮含量的易切削奥氏体不锈钢。 组成：具有低氮含量的易切削奥氏体不锈钢含有C：0.15重量％或更少，Si：1.0重量％或更少，Mn：1.0-3.5重量％，S：0.15-0.40重量％，Cr：16-19重量％ ，Ni 8-14重量％，Mo 2.5重量％或更少，Cu 4重量％或更少，N 0.015重量％或更少，其余为Fe和其他不可避免的杂质，其中Cr / N比为 1067〜19000，Mn / S比大于4.5，易切削奥氏体系不锈钢的氧含量为0.007〜0.11重量％。

公开(公告)号：KR1020020078439A

公开(公告)日：2002-10-18

申请号：KR1020010018798

申请日：2001-04-09

Applicant: 철강융합신기술연구조합 ,  재단법인 포항산업과학연구원

Inventor： 정재영 ,  이대수 ,  마봉열

IPC: C22C38/42

Abstract: PURPOSE: A free machining austenitic stainless steel having superior hot workability is provided, which is manufactured by controlling the amount of delta-ferrite in austenitic stainless steel with no addition of alloying element such as B. CONSTITUTION: The free machining austenitic stainless steel comprises C 0.15 wt.% or less, Si 1.0 wt.% or less, Mn 1.0 to 3.5 wt.%, S 0.15 to 0.40 wt.%, Cr 16 to 19 wt.%, Ni 8 to 14 wt.%, Mo 2.5 wt.% or less, Cu 4 wt.% or less, N 0.08 wt.% or less, a balance of Fe and other unavoidable impurities, wherein the portion of delta-ferrite in the free machining austenitic stainless steel is less than 6 wt.%, Mn/S is higher than 6 and the oxygen portion in the free machining austenitic stainless steel is 0.007 to 0.11 wt.%.

Abstract translation: 目的：提供一种具有优异的热加工性的免费加工奥氏体不锈钢，其通过在不添加诸如B的合金元素的情况下控制奥氏体不锈钢中的δ-铁素体的量来制造。构成：自由加工奥氏体不锈钢包括C 0.15重量％以下，Si 1.0重量％以下，Mn：1.0〜3.5重量％，S：0.15〜0.40重量％，Cr：16〜19重量％，Ni：8〜14重量％，Mo：2.5重量％ ％以下，Cu 4重量％以下，N 0.08重量％以下，余量由Fe和其他不可避免的杂质构成，其中游离加工奥氏体不锈钢中的δ-铁素体部分小于6重量％。 ％，Mn / S高于6，自由加工奥氏体不锈钢中的氧部分为0.007〜0.11重量％。

公开(公告)号：KR100262668B1

公开(公告)日：2000-08-01

申请号：KR1019970071441

申请日：1997-12-20

Applicant: 철강융합신기술연구조합 ,  재단법인 포항산업과학연구원

Inventor： 백응률 ,  마봉열 ,  정재영

IPC: B23K35/362

Abstract: PURPOSE: A chrome-carbide type wire for overlay welding is provided to form proper bead shape of fused metal and reduce spatter under welding by holding the metallic content of flux over 95wt.% and adjusting the amount of inorganic properly. CONSTITUTION: The wire for overlay welding comprises 30-60wt.% of flux and the rest of tubular outer skin. Further, the flux comprises C 2-6wt.%, Cr 10-35wt.%, Mn 0.5-4wt.%, Si 0.2-4wt.%, Al 3wt.% or less, CaF2 3wt.% or less, Ti/Ti-Fe 0.3-2.0wt.% 15wt.% or less of at least one element selected from the group consisting of Nb, Mo, W, V, and a balance of Fe wherein each weight percent is based on the total weight of wire.

Abstract translation: 目的：提供一种用于覆盖焊接的碳化铬型线，以形成熔融金属的合适的焊道形状，并通过将焊剂的金属含量保持在95wt。％以上，并适当调整无机物的量，减少焊接时的飞溅。 构成：覆盖焊丝包括30-60wt。％的焊剂和其余的管状外皮。 此外，焊剂包含C 2-6重量％，Cr 10-35重量％，Mn 0.5-4重量％，Si 0.2-4重量％，Al 3重量％以下，CaF 3重量％以下，Ti / Ti -Fe 0.3-2.0重量％15重量％以下的选自Nb，Mo，W，V中的至少一种元素，余量为Fe，其中每重量百分比基于导线的总重量。

公开(公告)号：KR1020080057591A

公开(公告)日：2008-06-25

申请号：KR1020060131071

申请日：2006-12-20

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

Inventor： 마봉열 ,  정재영

IPC: C22C38/08

CPC classification number: C22C38/54 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/44 ,  C22C38/50 ,  C22C2202/00

Abstract: Ca and B containing high Ni content duplex stainless steel is provided to improve hot workability by adding Ca and B to an alloy so as to increase strength and corrosion resistance. Ca and B containing high Ni content duplex stainless steel is obtained by adding 0.001 to 0.01% of Ca and B to an alloy consisting of, by a weight ratio, C: less than 0.03%, Si: less than 1.0%, Mn: less than 2.0%, Ni:7.5 to 9.5%, Cr:21.5 to 23.5%, Mo:2.5 to 3.5%, N:0.12 to 0.20%, and the remainder Fe and unavoidable impurities. The alloy is added with less than 0.1% of Ti.

Abstract translation: 提供含有高Ni含量双相不锈钢的Ca和B，以通过向合金中加入Ca和B来提高热加工性，从而提高强度和耐腐蚀性。 通过向合金中添加0.001〜0.01％的Ca，B，以重量比C：小于0.03％，Si：小于1.0％，Mn：少 Ni：7.5〜9.5％，Cr：21.5〜23.5％，Mo：2.5〜3.5％，N：0.12〜0.20％，余量为Fe和不可避免的杂质。 该合金加入少于0.1％的Ti。

公开(公告)号：KR100694312B1

公开(公告)日：2007-03-14

申请号：KR1020050125290

申请日：2005-12-19

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

Inventor： 정재영 ,  마봉열

IPC: C22C38/08

公开(公告)号：KR100419637B1

公开(公告)日：2004-02-25

申请号：KR1020010026744

申请日：2001-05-16

Applicant: 철강융합신기술연구조합 ,  재단법인 포항산업과학연구원

Inventor： 정재영 ,  이대수 ,  마봉열

IPC: C21D8/00

Abstract: PURPOSE: Provided is a method for improving hot workability of free machining austenitic stainless steel by controlling the shape of delta-ferrite in soaking process with no addition of B. CONSTITUTION: In the heat treatment method of free machining austenitic stainless steel that includes the step of soaking a steel comprising C 0.15 wt.% or less, Si 1.0 wt.% or less, Mn 1.0-3.5 wt.%, S 0.1-0.4 wt.%, Cr 16-19 wt.%, Ni 8-14 wt.%, Mo 2.5 wt.% or less, Cu 4 wt.% or less, N 0.08 wt.% or less, unavoidable impurities and a balance of Fe at 1220 to 1260 deg.C, the method is characterized in that the average ratio of major axis and minor axis of delta-ferrite is within the range of 1.0 to 2.5 and its size is 5 to 35 mm; Mn/S is higher than 4; and oxygen content in the free machining austenitic stainless steel is 0.007 to 0.011 %.

Abstract translation: 目的：提供一种通过在浸泡过程中控制δ铁素体的形状而不添加B来改善易切削奥氏体不锈钢的热加工性的方法。组成：在包括步骤（a）的热处理奥氏体不锈钢的热处理方法中， ，含有C：0.15重量％以下，Si：1.0重量％以下，Mn：1.0〜3.5重量％，S：0.1〜0.4重量％，Cr：16〜19重量％，Ni：8〜14重量％ ，Mo：2.5重量％以下，Cu：4重量％以下，N：0.08重量％以下，不可避免的杂质，剩余部分Fe在1220〜1260℃的范围内，其特征在于， δ铁素体的长轴与短轴之比在1.0至2.5的范围内并且其尺寸为5至35mm; Mn / S高于4; 而易切削奥氏体不锈钢的氧含量为0.007〜0.011％。

公开(公告)号：KR1020020076722A

公开(公告)日：2002-10-11

申请号：KR1020010016811

申请日：2001-03-30

Applicant: 철강융합신기술연구조합 ,  재단법인 포항산업과학연구원

Inventor： 정재영 ,  마봉열

IPC: C22C38/20

Abstract: PURPOSE: To manufacture a free machining austenitic stainless steel having low nitrogen contents by inhibiting precipitation of Cr-nitride at phase transition between austenite and MnS or austenite and ferrite. CONSTITUTION: The free machining austenitic stainless steel having low nitrogen contents comprises C 0.15 wt.% or less, Si 1.0 wt.% or less, Mn 1.0-3.5 wt.%, S 0.15-0.40 wt.%, Cr 16-19 wt.%, Ni 8-14 wt.%, Mo 2.5 wt.% or less, Cu 4 wt.% or less, N 0.015 wt.% or less, a balance of Fe and other inevitable impurities, wherein Cr/N ratio is 1067 to 19000, Mn/S ratio is higher than 4.5, and oxygen content in the free machining austenitic stainless steel is 0.007 to 0.11 wt.%.

Abstract translation: 目的：通过抑制奥氏体与奥氏体和奥氏体和铁素体之间的相变中的氮化铬析出，制造氮含量低的自由加工奥氏体不锈钢。 构成：氮含量低的自由加工奥氏体不锈钢包含C 0.15重量％以下，Si 1.0重量％以下，Mn 1.0-3.5重量％，0.15-0.40重量％，Cr 16-19重量％ ％，Ni 8-14重量％，Mo 2.5重量％以下，Cu 4重量％以下，N：0.015重量％以下，余量为Fe和其他不可避免的杂质，其中Cr / N比为 1067〜19000，Mn / S比高于4.5，自由加工奥氏体不锈钢中的氧含量为0.007〜0.11重量％。

公开(公告)号：KR102221451B1

公开(公告)日：2021-03-02

申请号：KR1020180160527

申请日：2018-12-13

Applicant: 주식회사 포스코 ,  재단법인 포항산업과학연구원

Inventor： 최미선 ,  마봉열

IPC: C23C4/06 ,  C23C4/131 ,  C23C4/129 ,  C23C24/04 ,  B21B3/00

Abstract: 본발명은티타늄(Ti) 슬라브; 및상기티타늄(Ti) 슬라브의표면에 Ti, Ni 또는 STS 분말로용사코팅된용사코팅층;을포함하는열간압연용티타늄슬라브를제공한다.

公开(公告)号：KR1020140098951A

公开(公告)日：2014-08-11

申请号：KR1020130011408

申请日：2013-01-31

Applicant: 재단법인 포항산업과학연구원

Inventor： 최미선 ,  마봉열

IPC: B22F9/28

Abstract: Provided is an apparatus to control an excess of reducing agents. According to the present invention, the apparatus to control an excess of reducing agents comprises: a reaction chamber into which a reducing agent and a target material are injected, and where the reducing agent reacts with the target material; a storage container provided for the upper part of the reaction chamber to store the target material; a nozzle provided for the lower end of the storage container to spray the target material stored in the storage container inside the reaction chamber; an injection pipe combined with the reaction chamber and equipped in a direction perpendicular to the nozzle to inject the reducing agent towards the target material injected inside the reaction chamber; and a collecting chamber to collect an unreacted reducing agent falling along a parabolic track into the lower end of the reaction chamber after the reducing agent is provided inside the reaction chamber, and then in contact with the target material. A spray nozzle to spray the reducing agent injected through the injection pipe towards the target material injected inside the reaction chamber is installed in one end of the injection pipe.

Abstract translation: 提供了控制多余的还原剂的装置。 根据本发明，控制过量还原剂的装置包括：反应室，其中注入还原剂和靶材料，还原剂与靶材料反应; 设置在反应室的上部以存储目标材料的存储容器; 设置在储存容器的下端的喷嘴，用于喷射存储在反应室内的储存容器内的目标材料; 注射管与反应室结合并配备在垂直于喷嘴的方向上，以将还原剂注射到注入反应室内的靶材料上; 以及收集室，用于在还原剂设置在反应室内部之后，将沿着抛物线轨道落入反应室的未反应还原剂收集到反应室的下端，然后与目标材料接触。 通过喷射管喷射的还原剂朝向喷射在反应室内的目标材料喷射的喷嘴安装在喷射管的一端。

公开(公告)号：KR101289231B1

公开(公告)日：2013-07-29

申请号：KR1020110136166

申请日：2011-12-16

Applicant: 주식회사 포스코 ,  재단법인 포항산업과학연구원

Inventor： 이고기 ,  최미선 ,  이창규 ,  마봉열 ,  박형석

IPC: G21F9/28 ,  B01D59/24

Abstract: 본 발명의 일측면인 방사성 원소 함량이 낮은 지르콘 정광의 제조방법은 지르콘 정광(Zircon Concentrates)을 준비하는 단계, 상기 준비된 지르콘 정광에 황산용액 및 질산용액을 부피비로, 1 : 1~3으로 첨가하는 단계, 상기 지르콘 정광, 황산용액 및 질산용액을 70~80℃에서 교반하는 단계, 상기 교반된 용액으로부터 침출수를 여과하는 단계 및 상기 여과단계 후, 여과되지 않은 지르콘을 50~60℃에서 세척하는 단계를 포함할 수 있다.