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公开(公告)号：KR100674216B1
公开(公告)日：2007-01-25
申请号：KR1020060055793
申请日：2006-06-21
CPC classification number: F42B1/032
Abstract: A tungsten-copper alloy part manufacturing method which minimizes residual pores existing in the alloy, obtains a very homogeneous structure of tungsten and copper, and improves thermal conductivity, ductility, tensile strength and fatigue strength by applying a tungsten-copper composite powder coated with fine tungsten particles to a powder injection process, thereby manufacturing a tungsten-copper alloy, and a heat sink, an electrode for discharge, an electric contact, and a liner for shaped charge warhead manufactured by the same are provided. A manufacturing method of a tungsten-copper alloy part comprises the steps of: milling a mixture of tungsten oxide(WO3 or WO2.9) powder and copper oxide(CuO or Cu2O) powder, holding the milled powder mixture in a temperature range of 200 to 400 deg.C under a reductive atmosphere for 1 minute to 5 hours, increasing temperature of the powder mixture again and holding the powder mixture in a temperature range of 500 to 700 deg.C for 1 minute to 5 hours, and increasing temperature of the powder mixture again and subjecting the powder mixture to reduction heat treatment in a temperature range of 750 to 1080 deg.C for 1 minute to 5 hours to prepare a tungsten-copper composite powder with a structure in which tungsten covers copper powder; mixing 30 to 70 vol.% of a binder with the prepared tungsten-copper composite powder as a raw material to manufacture an injection moldable mixture; injection molding the mixture into a molded body by a mold with a desired shape such as a heat sink or a liner for shaped charge warhead; dissolving the binder mixed with the injection molded body using a solvent and heating the dissolved binder to burn the binder, or directly heating the injection molded body to remove the binder mixed with the molded body; sintering the binder removed molded body at 1100 to 1400 deg.C in a hydrogen atmosphere or a hydrogen-containing reductive atmosphere to densify the density of a sintered body as much as 95% or more as compared with a theoretic density; and hot isostatic pressing the densified sintered body at 500 to 1400 deg.C and 5 to 200 MPa for 1 minute to 10 hours to remove pores in the sintered body.
Abstract translation: 一种使合金中存在的残余孔最小化的钨铜合金部件制造方法，通过涂覆精细的钨铜复合粉末，获得钨和铜的非常均匀的结构，并且提高导热性，延展性，拉伸强度和疲劳强度 钨粉末进行粉末喷射处理，从而制造钨铜合金，以及散热器，放电用电极，电接点和由其制造的成形电荷弹头的衬垫。 钨铜合金部件的制造方法包括以下步骤：研磨氧化钨（WO3或WO2.9）粉末和氧化铜（CuO或Cu2O）粉末的混合物，将研磨的粉末混合物保持在200℃的温度范围内 在400℃下还原气氛1分钟至5小时，再次升高粉末混合物的温度，并将粉末混合物在500-700℃的温度范围内保持1分钟至5小时， 再次将粉末混合物在750〜1080℃的温度范围内进行还原热处理1分钟〜5小时，制备钨覆铜粉结构的钨铜复合粉末; 以制备的钨 - 铜复合粉末为原料，混合30〜70体积％的粘合剂，制造注塑成型混合物; 通过具有所需形状的模具将混合物注塑成型体，例如散热器或成形充电弹头的衬垫; 使用溶剂溶解与注射成型体混合的粘合剂，加热溶解的粘合剂以烧结粘合剂，或直接加热注射成型体以除去与成型体混合的粘合剂; 在氢气氛或含氢还原气氛中，在1100〜1400℃下烧结粘合剂除去成型体，使烧结体的密度与理论密度相比高达95％以上。 并在500〜1400℃，5〜200MPa下将致密化的烧结体热等静压1分钟〜10小时，除去烧结体中的孔。
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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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公开(公告)号：KR1020030086732A
公开(公告)日：2003-11-12
申请号：KR1020020024858
申请日：2002-05-06
Applicant: 국방과학연구소
IPC: B22F9/00
CPC classification number: B22F3/225 , B22F1/025 , B22F9/22 , B22F2998/00 , B22F2998/10 , B22F2999/00 , C22C1/045 , B22F3/22 , B22F9/04 , B22F3/1017
Abstract: PURPOSE: A tungsten-copper composite powder without production of intermediate such as CuWO4, a manufacturing method of tungsten coated tungsten-copper composite powder by introducing three-step reduction heat treatment, and an application of the tungsten coated tungsten-copper composite powder as powder injection molding purposes are provided. CONSTITUTION: The method comprises the steps of mixing and pulverizing tungsten oxide (WO3 or WO2.9) powder and cooper oxide (CuO or Cu2O) powder by tubular mixing or ball milling; and reducing the mixed and pulverized oxide powder in a hydrogen atmosphere or hydrogen contained reduction gas atmosphere, wherein tungsten and copper are mixed in a weight ratio of 10:90 to 90:10 in the tungsten-copper composite powder, wherein the tubular mixing or ball milling is performed for 1 minute to 50 hours, and wherein the reduction heat treatment step comprises the process of cooling the resulting oxide powder after holding the mixed and pulverized oxide powder in the temperature range of 200 to 400 deg.C for 1 minute to 5 hours, increasing temperature of the oxide powder so that the oxide powder is held in the temperature range of 500 to 700 deg.C for 1 minute to 5 hours, and again increasing temperature of the oxide powder so that the oxide powder is held in the temperature range of 750 to 1,080 deg.C for 1 minute to 5 hours.
Abstract translation: 目的：不生产CuWO4等中间体的钨铜复合粉末，通过引入三步还原热处理的钨涂层钨铜复合粉末的制造方法，以及涂覆钨钨铜复合粉末的粉末 提供注射成型目的。 方法：该方法包括以下步骤：通过管式混合或球磨将氧化钨（WO3或WO2.9）粉末和氧化钴（CuO或Cu2O）粉末混合和粉碎; 在氢气气氛或氢气还原气体气氛中还原混合粉碎的氧化物粉末，其中在钨 - 铜复合粉末中钨和铜以10:90至90:10的重量比混合，其中管状混合或 进行球磨1分钟〜50小时，其中还原热处理步骤包括将混合粉碎的氧化物粉末在200〜400℃的温度范围内保持1分钟后冷却所得到的氧化物粉末的工序， 5小时，氧化物粉末的温度升高，使得氧化物粉末在500-700℃的温度范围内保持1分钟至5小时，再次升高氧化物粉末的温度，使氧化物粉末保持在 温度范围750〜1080℃1分钟〜5小时。
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公开(公告)号：KR1020110128670A
公开(公告)日：2011-11-30
申请号：KR1020100048247
申请日：2010-05-24
Applicant: 국방과학연구소
Abstract: PURPOSE: A method for producing a copper liner having homogeneous ultrafine particles is provided to homogeneously and minutely produce ultrafine particles having 20-30 micrometers using a new forging process. CONSTITUTION: A method for producing a copper liner having homogeneous ultrafine particles is as follows. An extrusion material is produced by extruding a copper billet. A forged material is produced by cold-forging the extrusion material. The forged material is re-crystallized.
Abstract translation: 目的：提供一种具有均匀超微粒子的铜衬套的制造方法，使用新的锻造工艺均匀且精细地制造具有20-30微米的超微粒子。 构成：具有均匀的超微粒子的铜衬垫的制造方法如下。 通过挤出铜坯制造挤出材料。 通过冷锻挤出材料制造锻造材料。 锻造的材料再结晶。
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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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Patent Agency Ranking
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：KR1020120037625A
公开(公告)日：2012-04-20
申请号：KR1020100099194
申请日：2010-10-12
Applicant: 국방과학연구소
CPC classification number: C22C27/04 , B22F1/025 , C22C1/0425 , C22C1/045 , C22C9/00
Abstract: PURPOSE: Alloy of tungsten(W) and copper(Cu) having functionally graded material(FGM) layers, metal material having the same and manufacturing method for alloy of W and Cu is provided to alleviate residual heat stress by using tungsten - copper alloy. CONSTITUTION: Tungsten - copper alloy(130) is made of tungsten and copper. A plurality of layers(131,132,133) has a different composition ratio of copper and tungsten. Copper powder coated with tungsten is sintered in which the tungsten is laminated according to the content of tungsten. The content of tungsten diminishes or increases successively.
Abstract translation: 目的：提供具有功能梯度材料（FGM）层的钨（W）和铜（Cu）合金，具有相同的金属材料和W和Cu合金的制造方法，以通过使用钨铜合金来减轻残余热应力。 构成：钨 - 铜合金（130）由钨和铜制成。 多个层（131,132,133）具有不同的铜和钨的组成比。 根据钨的含量，将钨层叠的铜粉烧结成钨。 钨的含量相继减少或增加。
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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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