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    • 83. 发明公开
    • 가스터빈용 블레이드 링 제조방법
    • 制造用于气体涡轮机的叶片的方法
    • KR1020140130275A
    • 2014-11-10
    • KR1020130048162
    • 2013-04-30
    • 배정식주식회사 대진메탈공업
    • 조정봉이창렬박성부이상원
    • B22D7/06B22D29/00C21D1/28C21C7/04
    • 본 발명은 가스터빈용 블레이드 링 제조방법에 관한 것으로서, Fe 83.5~88.47%, Cr11.5~14.0%, Ni0.01~1.0%, Mo0.01~0.5%, Mn0.01~1.0%로 이루어진 합금조성물을 용해로에서 용해시키는 단계; 상기 용해된 합금조성물의 용탕을 AOD정련하는 단계로서, 노저부근의 측벽에 2중관 구조의 풍구를 설치하여 아르곤(Ar)과 산소(O2) 혼합가스를 용탕 중에 취입되도록 하되, 풍구의 외관에는 냉각용 아르곤(Ar)가스가, 그리고 내관에는 취련용 혼합가스가 공급되도록 하는 AOD정련 단계; 상기 AOD정련작업을 마친 용해합금(용탕)을 출탕, 래들을 이용해 몰드로 이동시켜 주입하는 단계; 완성된 주물의 탈형하여, 황삭 및 정삭가공하는 단계; 및 상기 면가공된 제품을 열처리하는 단계;를 포함하는 것을 특징으로 한다.
      본 발명은 AOD정련방식의 사형주조법을 통해 주조된 블레이드 링을 열처리 조건을 통해 조직과 물성평가를 최적화 함으로써, 가스터빈 주요부품의 국산화 개발을 통한 수입대체 및 원가절감효과가 있고, 가스터빈용 블레이드 링의 물성이 뛰어나, 발전시스템의 효율을 향상시키고, 에너지 절감 및 운전비용 절감이 이루어지게 된다.
    • 本发明涉及一种用于制造燃气轮机叶片环的方法,包括:将包含83.5-88.47%的Fe,11.5-14.0%的Cr,0.01-1.0%的Ni,0.01-0.5%的Fe, 的Mo,0.01〜1.0%的Mn; AOD精炼溶解的合金组合物的熔融金属的步骤,即将氩(Ar)和氧(O 2)气体混合物注入到熔融金属中的AOD精制步骤,通过将双管风口安装在靠近 向炉外管供给用于冷却的氩(Ar)气体,向内管吹送气体混合物; 对通过AOD精制工序的熔融合金(熔融金属)进行攻丝的步骤,通过使用钢包将熔融金属移动并注入模具中; 通过分离完成的铸件粗化和整理完成的铸件的步骤; 以及对面部加工产品进行热处理的步骤。 本发明具有降低能量和操作成本的效果,并且提高发电机的效率,因为用于燃气轮机的叶片环的物理性能优异; 并通过优化由于热处理条件的AOD精炼法的砂铸造工艺铸造的叶片环的性能估值和结构而降低成本并替代由于燃气轮机的主要部件的定位开发而引进的进口。
    • 88. 发明公开
    • 티타늄 함유 오스테나이트계 스테인리스강의 용강 정련방법
    • 用于精炼具有TI的奥氏体不锈钢的方法
    • KR1020140028401A
    • 2014-03-10
    • KR1020120094560
    • 2012-08-28
    • 주식회사 포스코
    • 김기수김선인
    • C21C7/10C21C7/04C21C7/068
    • C21C7/10B22D11/113C21C7/0006C21C7/06C21C7/0645C21C7/0685F27D2027/002
    • The present invention relates to a method for refining austenitic stainless steel containing titanium capable of producing austenitic stainless steel containing titanium using a vacuum oxygen decarburization (VOD). The method for refining austenitic stainless steel containing titanium according to one embodiment of the present invention refines austenitic stainless steel containing titanium and includes a preparation step which primarily controls the concentration of carbon by decarbonizing while blowing oxygen and non-active gas into a reducing furnace where molten steel is inputted; a vacuum decarbonization step which secondarily controls the concentration of carbon up to the aimed concentration of carbon by decarbonizing while blowing oxygen and non-active gas into a ladle under a vacuum condition after mounting the ladle where the molten steel of which the concentration of carbon is primarily controlled is inputted to vacuum refining equipment; and a vacuum reduction desulfurization step which performs decarbonization and desulfurization by putting sub raw materials and a deoxidizing agent into the ladle while stirring the molten steel under a vacuum condition. The sub raw materials put in the vacuum reduction desulfurization step include alloy iron containing titanium and accomplish the aimed titanium concentration of the molten iron. [Reference numerals] (AA) Inputting molten steel into a reducing furnace; (BB) Blowing oxygen (primary decarbonization); (CC) Excluding slag; (DD) Mounting a ladle where the molten steel is inputted to a VOD; (EE) Vacuumizing; (FF) Blowing oxygen (secondary decarbonization); (GG) Stopping blowing oxygen; (HH) Stirring the molten steel and inputting sub materials and a deoxidizing agent(desulfurization and deoxidation, component control)(inputting sub raw materials containing Ti); (II) Releasing vacuum; (JJ) Controlling the temperature of the molten steel; (KK) Taking out the molten steel
    • 本发明涉及一种能够使用真空氧脱碳(VOD)生产含有钛的奥氏体不锈钢的含有钛的奥氏体不锈钢的精制方法。 根据本发明的一个实施方案的用于精炼含钛的奥氏体不锈钢的方法是对含钛的奥氏体不锈钢进行精炼,并且包括一个制备步骤,其主要通过脱碳同时将氧气和非活性气体吹入还原炉中来控制碳的浓度, 输入钢水; 真空脱碳步骤,其在将钢水浓度为碳的钢水安装在钢水包之后,在真空条件下,通过脱碳二次控制碳浓度达到目标碳浓度,同时在真空条件下将氧气和非活性气体吹入钢包中 主要控制输入到真空精炼设备; 以及减压脱硫工序,在真空条件下搅拌钢水的同时,将副原料和脱氧剂放入钢包中进行脱碳脱硫。 放入真空还原脱硫步骤的次原料包括含钛合金铁,并实现铁水的目标钛浓度。 (附图标记)(AA)将钢水输入还原炉; (BB)吹氧(初级脱碳); (CC)除渣; (DD)将输入钢水的钢包安装到VOD上; (EE)真空; (FF)吹氧(次级脱碳); (GG)停止吹氧; (HH)搅拌钢水并输入副材料和脱氧剂(脱硫脱氧,成分控制)(输入含钛的原料); (二)释放真空; (JJ)控制钢水温度; (KK)取出钢水
    • 90. 发明公开
    • 청정강 제조 장치 및 이를 이용한 정련 방법
    • 用于超声波清洁钢生产的装置和使用其制造精炼方法
    • KR1020130125160A
    • 2013-11-18
    • KR1020120048697
    • 2012-05-08
    • 포항공과대학교 산학협력단
    • 조중욱이해건김상준강윤배박인범
    • C21C7/00C21C7/04
    • B22D1/00B22D11/116C21C7/076C21C7/10Y02P10/242
    • The present invention relates to a clean steel manufacturing apparatus, and, more specifically, to the apparatus applied with a siphon tundish technology and a refining method using the same, wherein the apparatus effectively removing non-metallic inclusions inside molten metal through a droplet technology and bubble cleaner technology for the molten metal and preventing turbulence generated when the molten metal is transferred to a mold. The present invention provides the apparatus includes: a molten metal droplet unit forming the molten metal fed from a ladle into droplets and removing the non-metallic inclusions from the molten metal by passing the droplets through a slag layer; a bubble clear unit being placed at the lower end portion of the molten metal droplet unit and removing the non-metallic inclusions from the molten metal by forming minute bubbles inside the molten metal and by intensely mixing the bubbles with the molten metal; a siphon tundish unit being placed at the lower end portions of the bubble cleaner unit and stabilizing the mold level of the molten metal fed to the mold; and a deposition nozzle part feeding the molten metal, which has passed through the siphon tundish unit, to the mold.
    • 本发明涉及一种清洁钢铁制造装置,更具体地说,涉及应用虹吸中间包技术的装置及使用其的精炼方法,其中该装置通过液滴技术有效地去除熔融金属内部的非金属夹杂物, 用于熔融金属的气泡清洁技术,并防止当熔融金属转移到模具时产生的湍流。 本发明提供的装置包括:熔融金属液滴单元,其形成从钢包进料到液滴中的熔融金属,并通过使液滴通过熔渣层从熔融金属去除非金属夹杂物; 气泡透明单元被放置在熔融金属液滴单元的下端部分,并且通过在熔融金属内部形成微小气泡并通过将气泡与熔融金属强烈混合而从熔融金属中除去非金属夹杂物; 虹吸中间包单元放置在气泡吸收器单元的下端部分,并稳定供给到模具的熔融金属的模具水平; 以及将已经通过虹吸中间包单元的熔融金属供给到模具的沉积喷嘴部分。