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公开(公告)号：KR100468215B1
公开(公告)日：2005-01-26
申请号：KR1020020024857
申请日：2002-05-06
Applicant: 국방과학연구소
IPC: C23C24/08
CPC classification number: C23C26/00
Abstract: Disclosed is a tungsten film coating method using tungsten oxide powders including the steps of contacting the tungsten oxide powders with a metal substrate and carrying out thermal reduction treatment thereon at a temperature of at least 650° C. under a hydrogen atmosphere just to coat the tungsten film on the metal substrate. Accordingly, the present invention enables to provide a simple method of coating a tungsten thin film on a metal substrate using the phenomenon of tungsten migration through vapor phase when thermal reduction treatment is carried out on tungsten oxide powders without using previous chemical or physical vapor depositions requiring expensive precision equipments or causing environmental pollution.
Abstract translation: 公开了一种使用氧化钨粉末的钨膜涂布方法，包括以下步骤：使氧化钨粉末与金属基材接触，并在至少650℃的温度下对其进行热还原处理; C.在氢气气氛下仅涂布金属基材上的钨膜。 因此，本发明能够提供一种简单的方法，当在钨氧化物粉末上进行热还原处理时，使用通过气相钨移动的现象在金属基底上涂覆钨薄膜，而无需使用先前的化学或物理气相沉积 昂贵的精密设备或造成环境污染。
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公开(公告)号：KR100197152B1
公开(公告)日：1999-06-15
申请号：KR1019960013835
申请日：1996-04-30
Applicant: 국방과학연구소
IPC: B22F3/00
CPC classification number: B22F3/101 , B22F2201/01 , B22F2201/10 , C22C1/045
Abstract: A sintering method for a W-Ni-Mn type heavy alloy, including controlling the deoxidization of tungsten and nickel under an inert atmosphere, changing to a hydrogen atmosphere at above a temperature at which manganese is deoxidized and simultaneously deoxidizing tungsten, nickel and manganese, and sintering by raising the temperature, resulting in the fabrication of a sintered heavy alloy having a 100% relative theoretical density.
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公开(公告)号：KR1019970069198A
公开(公告)日：1997-11-07
申请号：KR1019960013835
申请日：1996-04-30
Applicant: 국방과학연구소
IPC: B22F3/00
Abstract: 본 발명은 텅스텐-니켈-망간계 중합금의 소결방법에 관한 것으로, 종래에는 800℃에서 60분간 유지하며 텅스텐, 니켈 및 망간의 산화물을 수소 분위기에서 환원하였으나, 망간이 환원되지 못하고 산화물을 형성하여 기공이 발생하므로서 기계적인 강도가 현저히 낮아지는 문제점이 있었던 바, 본 발명의 텅스텐-니켈-망간계 중합금의 소결방법은 불활성 분위기를 유지하여 텅스텐과 니켈의 환원을 억제하고, 망간이 환원되는 온도에서 수소 분위기로 전환하여 텅스텐, 니켈 및 망간을 동시에 환원시킨 다음, 온도를 올려서 액상소결함으로서 비이론 밀도가 100%인 소결 합금을 얻는 효과가 있다.
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公开(公告)号：KR1019950005290B1
公开(公告)日：1995-05-23
申请号：KR1019920014130
申请日：1992-08-06
Applicant: 주식회사 풍산홀딩스 , 국방과학연구소
IPC: B22F3/00
Abstract: The method comprises maintaining the tungsten based alloy at 950-1350 deg.C for 1 min. to 24 hrs., quenching in water or oil and repeating the cycle of heating and quenching steps. The heating step is carried out in an inert atmosphere, and the cycle of heating and quenching is repeated 2-60 times. The alloy is composed of (in wt.) 86-99% W, 0.5-9 wt.% Ni and 0.5-5 % Fe. The alloys are used for rotors for aircraft, radioactive shield materials and core materials for kinetic energy penetrators in military applications.
Abstract translation: 该方法包括将钨基合金保持在950-1350℃1分钟。 至24小时，在水或油中淬火并重复加热和淬火步骤的循环。 加热步骤在惰性气氛中进行，加热淬火循环重复2-60次。 该合金由（重量）86-99％W，0.5-9％（重量）Ni和0.5-5％Fe组成。 该合金用于飞机，放射性屏蔽材料和用于军事应用中的动能穿透器的核心材料的转子。
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公开(公告)号：KR1019940004064A
公开(公告)日：1994-03-14
申请号：KR1019920014130
申请日：1992-08-06
Applicant: 주식회사 풍산홀딩스 , 국방과학연구소
IPC: B22F3/00
Abstract: 본 발명은 인장강도와 연신을을 유지 하면서 충격인성(충격에너지)을 향상시 키는데 적합한 텅스텐(基) 합금의 열처리에 관한 것으로, 86-99 중량%를 기(基)로 하는 텅스텐에 Ni, Fe, Cu, Mo중 선택한 1종 이상이 조성된 소결합금을 950-1350℃에서 1분-24시간 유지한 후 수냉 또는 유냉하는 열처리를 반복적으로 처리하여 충격인성을 증대시키는 텅스텐 기(基) 합금의 열처리 방법에 관한 기술이다.
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Patent Agency Ranking
公开(公告)号：KR100904202B1
公开(公告)日：2009-06-23
申请号：KR1020080133924
申请日：2008-12-24
Applicant: 국방과학연구소
Abstract: A manufacturing method of a tungsten-yttria rod is provided to produce a tungsten-yttria rod improved in heat-proof and ablation resistance by warm-extruding a sintered body. A manufacturing method of a tungsten-yttria rod comprises the steps of: forming a powder molded body by compression-molding compound powder consisting of tungsten powder 95~99.5 weight% and yttria powder 0.5~5 weight(S11); reducing a surface oxide layer of the powder molded body by increasing the surrounding temperature to 800°C; removing metallic impurities from the powder molded body by increasing the surrounding temperature to 1900°C; sintering the powder molded body for a fixed time to form a sintered body by increasing the surrounding temperature to 2000~2500°C at increasing rate lower than that in the above reducing and removing steps(S12); a step of removing the residual hydrogen inside the sintered body by decreasing the surrounding temperature to 1200°C; warm-extruding the sintered body to form an extruded body with enhanced strength and density(S13); and heat-treating the extruded body at the temperature of 1000~1300°C for half an hour or an hour so that the residual stress of the extruded body is removed.
Abstract translation: 提供了一种钨 - 氧化钇棒的制造方法，以通过热挤压烧结体来制造提高耐热和耐烧蚀性的钨 - 氧化钇棒。 钨 - 氧化钇棒的制造方法包括以下步骤：通过压缩由钨粉95〜99.5重量％和氧化钇粉0.5〜5重量（S11）组成的复合粉末来形成粉末成型体; 通过将周围温度升高到800℃来还原粉末成型体的表面氧化层; 通过将周围温度提高到1900℃，从粉末成型体中除去金属杂质; 将粉末成型体烧结一段固定的时间，以比上述还原和除去步骤（S12）低的速率将周围温度提高到2000〜2500℃，形成烧结体。 通过将周围温度降低到1200℃来除去烧结体内的残留氢的步骤; 温热挤压烧结体以形成具有增强的强度和密度的挤出体（S13）; 并在1000〜1300℃的温度下对挤压体进行半小时或一小时的热处理，从而去除挤压体的残余应力。
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公开(公告)号：KR100257463B1
公开(公告)日：2000-06-01
申请号：KR1019980010329
申请日：1998-03-25
Applicant: 국방과학연구소 , 주식회사 풍산홀딩스
IPC: B22F3/00
Abstract: PURPOSE: A penetrator material is provided, which can promote self sharpening of the penetrator capable of improving penetrating capability of a tungsten heavy alloy material by carrying out existing processes of sintering, heat treatment and cold rolling, and then adding second cold rolling process after resintering and reheating the cold rolled material, thereby making shapes of tungsten particles irregular. CONSTITUTION: The method for manufacturing a penetrator of tungsten heavy alloy in which penetrating capability is improved comprises the steps of resintering the cold rolled material at a temperature of 1400 to 1500 deg.C for 30 minutes to 8 hours after forming, sintering, heat treating and cold rolling tungsten heavy alloy powder; reheating step of water cooling the heated material after heating the resintered material at a temperature of 1000 to 1300 deg.C for 2 to 10 hours; second cold rolling the reheated material so that a cross section ratio of the material becomes 5 to 30%; and seasoning the cold rolled material at a temperature of 300 to 600 deg.C for 10 to 100 minutes, wherein the tungsten heavy alloy comprises 80 to 93 wt.% of tungsten and a balance of a mixture of one or more elements selected from Ni, Fe, Co, and Mn.
Abstract translation: 目的：提供穿透材料，通过进行烧结，热处理和冷轧的现有工艺，可以促进穿透机的自锐度，从而提高钨重质合金材料的穿透能力，然后在树脂加工后加入第二次冷轧工艺 并重新加热冷轧材料，从而使钨颗粒的形状不规则。 构成：穿透能力提高的钨重合金穿透剂的制造方法包括在成形，烧结，热处理后在1400〜1500℃的温度下将冷轧材料树脂化30分钟〜8小时的工序 和冷轧钨重合金粉末; 在1000〜1300℃的温度下加热烧结材料2〜10小时后，对加热后的材料进行水冷却的再加热工序; 第二次冷轧再热材料，使得材料的截面比为5〜30％; 并在300〜600℃的温度下调制冷轧材料10〜100分钟，其中钨重合金含有80〜93重量％的钨，余量为选自Ni的一种或多种元素的混合物 ，Fe，Co和Mn。
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公开(公告)号：KR100186931B1
公开(公告)日：1999-04-01
申请号：KR1019960013836
申请日：1996-04-30
Applicant: 국방과학연구소
CPC classification number: C22C1/045 , B22F3/1007 , B22F2201/013
Abstract: A fabrication method for a tungsten heavy alloy includes first fabricating a green compact or a sintered body composed of tungsten and other elements except manganese, then putting manganese thereon, and sintering the tungsten heavy alloy with manganese manganese, whereby the formation of pores, which occurs because manganese is oxidized by the deoxidation of oxides existing on the surface of powders of tungsten, nickel and iron is prevented, and a tungsten heavy alloy having a 100% non-theoretical density of 100% is obtained.
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公开(公告)号：KR100490880B1
公开(公告)日：2005-05-24
申请号：KR1020020075678
申请日：2002-11-30
Applicant: 국방과학연구소
IPC: B22F3/10
CPC classification number: C22C27/04 , B22F1/0003 , B22F9/22 , B22F2998/10 , B22F2999/00 , C22C1/045 , H01H1/025 , B22F3/14 , B22F3/1035 , B22F3/1028 , B22F1/0096
Abstract: 본 발명은 텅스텐-구리 복합재료의 치밀화 공정에 관한 것으로, 특히 구리의 스며나옴 현상을 억제하면서 텅스텐-구리 복합재료를 소결하는 방법에 관한 것이다. 본 발명에 따른 소결법은 텅스텐-구리 복합분말 성형체를 구리의 고상 온도 또는 융점 직상의 온도에서 일정시간 유지하여 거의 완전한 치밀화를 유도하고, 구리의 액상형성온도에서 짧은 시간 소결하는 것을 포함한다.
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