公开(公告)号：KR1020040056100A

公开(公告)日：2004-06-30

申请号：KR1020020082644

申请日：2002-12-23

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

Inventor： 정재영 ,  박재철 ,  마봉열

IPC: C22C38/12

Abstract: PURPOSE: A high speed tool steel containing trace of cobalt is provided which controls hardness according to hardening temperature by controlling Co content and improves hardness by adding Si at the same time, and a method for manufacturing the same is provided. CONSTITUTION: The high hardness high speed tool steel containing trace of cobalt by controlling Co and Si contents comprises 0.75 to 1.1 wt.% of C, 0.1 to 1.0 wt.% of Si, 0.5 wt.% or less of Mn, 3.7 to 4.5 wt.% of Cr, 0.30 wt.% or less of Ni, 0.3 to 0.8 wt.% of Co, 4.5 to 5.5 wt.% of Mo, 5.5 to 6.8 wt.% of W, 1.7 to 2.2 wt.% of V, 0.6 wt.% or less of Cu and a balance of Fe and other inevitable impurities, wherein the high speed tool steel comprises 0.32 to 1.0 wt.% of Si, and wherein the high speed tool steel has 64 or more of Rockwell hardness. The method for manufacturing the high hardness high speed tool steel containing trace of cobalt by controlling Co and Si contents comprises the process of performing hot working on the homogenization treated steel slab by homogenization treating a steel slab comprising 0.75 to 1.1 wt.% of C, 0.1 to 1.0 wt.% of Si, 0.5 wt.% or less of Mn, 3.7 to 4.5 wt.% of Cr, 0.30 wt.% or less of Ni, 0.3 to 0.8 wt.% of Co, 4.5 to 5.5 wt.% of Mo, 5.5 to 6.8 wt.% of W, 1.7 to 2.2 wt.% of V, 0.6 wt.% or less of Cu and a balance of Fe and other inevitable impurities at a temperature of 1,100 to 1,150 deg.C.

Abstract translation: 目的：提供含有痕量钴的高速工具钢，其通过控制Co含量来控制硬度，同时通过加入Si来提高硬度，并提供其制造方法。 构成：通过控制Co和Si含量，含有痕量钴的高硬度高速工具钢包含C：0.75〜1.1％，Si：0.1〜1.0％，Mn：0.5％（重量）以下，3.7〜4.5 Cr的重量％，Ni的0.30重量％或更少，Co的0.3至0.8重量％，Mo的4.5至5.5重量％，W的5.5至6.8重量％，V的1.7至2.2重量％ ，0.6重量％以下的Cu和余量的Fe等不可避免的杂质，其中高速工具钢含有0.32〜1.0重量％的Si，其中高速工具钢的洛氏硬度为64以上。 通过控制Co和Si含量来制造含有痕量钴的高硬度高速工具钢的方法包括对均质处理的钢板进行热处理，通过均化处理含有0.75-1.1重量％的C的钢坯， 0.1〜1.0重量％的Si，0.5重量％以下的Mn，3.7〜4.5重量％的Cr，0.30重量％以下的Ni，0.3〜0.8重量％的Co，4.5〜5.5重量％ 温度为1100〜1150℃，Mo为5.5〜6.8重量％，V为1.7〜2.2重量％，Cu为0.6重量％以下，余量由Fe和其他不可避免的杂质构成。

公开(公告)号：KR1020020076723A

公开(公告)日：2002-10-11

申请号：KR1020010016812

申请日：2001-03-30

Applicant: 철강융합신기술연구조합 ,  재단법인 포항산업과학연구원

Inventor： 정재영 ,  마봉열

IPC: C22C38/12

Abstract: PURPOSE: To manufacture Co-free high speed steel having superior hardness by modifying Si and Cu content with no addition of Co or rare earth metals. CONSTITUTION: The Co-free high speed steel having superior hardness is manufactured by soaking an alloy cast comprising C 0.75 to 1.1 wt.%, Si 0.32 to 1.0 wt.%, Mn 0.5 wt.% or less, Cr 3.7 to 4.5 wt.%, Ni 0.30 wt.% or less, Mo 4.5 to 5.5 wt.%, W 5.5 to 6.8 wt.%, V 1.7 to 2.2 wt.%, Cu 0.6 wt.% or less, a balance of Fe and other inevitable impurities at 1100 to 1150 deg.C, wherein Si is 0.5 to 1.0 wt.% and Cu is less than 0.3 wt.%.

Abstract translation: 目的：通过不添加Co或稀土金属，通过改变Si和Cu含量来制造具有优异硬度的无钴高速钢。 构成：具有优异硬度的无Co高速钢通过将包含C 0.75〜1.1重量％，Si 0.32〜1.0重量％，Mn 0.5重量％以下，Cr 3.7〜4.5重量％的合金铸件， ％，Ni 0.30重量％以下，Mo 4.5〜5.5重量％，W 5.5〜6.8重量％，V 1.7〜2.2重量％，Cu：0.6重量％以下，余量为Fe和其他不可避免的杂质 在1100〜1150℃，Si为0.5〜1.0重量％，Cu为0.3重量％以下。

公开(公告)号：KR1019990052000A

公开(公告)日：1999-07-05

申请号：KR1019970071441

申请日：1997-12-20

Applicant: 철강융합신기술연구조합 ,  재단법인 포항산업과학연구원

Inventor： 백응률 ,  마봉열 ,  정재영

IPC: B23K35/362

Abstract: 본 발명은 경화육성용 용접와이어에 관한 것이며; 그 목적은 스패트 발생량이 적고, 용착금속의 비드형상이 건전하게 형성될 수 있는 경화육성용 용접와이어를 제공함에 있다.
상기 목적을 달성하기 위한 본 발명은 플럭스가 30-60중량%이고, 나머지 튜브라형 외피로 구성되는 육성용접 와이어에 있어서, 상기 플럭스중 95중량%이상이 와이어 총중량에 대하여 C:2-6중량%, Cr:10-35중량%, Mn:0.5-4중량%, Si:0.2-4중량% 및 나머지 Fe로 이루어지는 금속분말이고; 상기 플럭스중의 나머지 5중량%이하가 와이어의 총중량에 대하여 Al:3중량%이하, CaF
2 :3중량%이하, Ti또는 Fe-Ti중 선택된 1종:0.3-2.0중량%로 이루어지는 혼합분말로 구성되는 고효율 크롬탄화물형 경화육성용 용접와이어에 관한 것을 그 요지로 한다.

公开(公告)号：KR100431830B1

公开(公告)日：2004-05-17

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：提供一种具有优良热加工性的易切削奥氏体不锈钢，其通过控制奥氏体不锈钢中的δ铁素体的量而不添加合金元素如B来制造。组成：所述易切削奥氏体不锈钢包含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％ 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，所述易切削奥氏体系不锈钢中的δ铁素体的含量小于6重量％ ％，Mn / S高于6，并且所述易切削奥氏体不锈钢中的氧含量为0.007-0.11重量％。

公开(公告)号：KR1020080057590A

公开(公告)日：2008-06-25

申请号：KR1020060131070

申请日：2006-12-20

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

Inventor： 마봉열 ,  정재영

IPC: C22C38/08

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

Abstract: Ca containing high Ni content duplex stainless steel is provided to improve hot workability increase by adding Ca and Ti to an alloy. Ca containing high Ni content duplex stainless steel is obtained by adding 0.001 to 0.01% of Ca 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，以通过向合金中添加Ca和Ti来改善热加工性增加。 通过向合金中添加0.001〜0.01％的Ca，以重量比C：小于0.03％，Si：小于1.0％，Mn：小于2.0％的合金，得到含有高Ni含量双相不锈钢的Ca， 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：KR100502193B1

公开(公告)日：2005-07-20

申请号：KR1020020082644

申请日：2002-12-23

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

Inventor： 정재영 ,  박재철 ,  마봉열

IPC: C22C38/12

Abstract: 본 발명은 절삭기계의 공구로 사용되는 고속도공구강 및 그 제조방법에 관한 것이다.
이 고속도공구강은 중량%로, C: 0.75~1.1%, Si: 0.1~1.0%, Mn: 0.5% 이하, Cr: 3.7~4.5%, Ni: 0.30% 이하, Co: 0.3~0.8%, Mo: 4.5~5.5%, W: 5.5~6.8%, V: 1.7~2.2%, Cu: 0.6% 이하, 나머지 Fe및 기타 불가피한 불순물로 조성된다. 또한, 이 고속도공구강의 제조방법 역시 제공된다.
이 고속도공구강은 M2 고속도공구강의 열간가공성을 가지면서 목표 경도치를 갖는다. 따라서, 선재 및 봉재의 생산이 용이하며, M2 고속도공구강의 품질이 향상된다.

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。