KR970008042B1 - Method of manufacturing sintered alloy - Google Patents

Method of manufacturing sintered alloy Download PDF

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KR970008042B1
KR970008042B1 KR1019940029891A KR19940029891A KR970008042B1 KR 970008042 B1 KR970008042 B1 KR 970008042B1 KR 1019940029891 A KR1019940029891 A KR 1019940029891A KR 19940029891 A KR19940029891 A KR 19940029891A KR 970008042 B1 KR970008042 B1 KR 970008042B1
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South Korea
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tin
sintered alloy
titanium nitride
color
nitride
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KR1019940029891A
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Korean (ko)
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KR960017013A (en
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박권희
류영덕
최덕순
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대한중석 주식회사
양수제
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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/04—Making non-ferrous alloys by powder metallurgy
    • C22C1/045—Alloys based on refractory metals
    • C22C1/0458—Alloys based on titanium, zirconium or hafnium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C14/00—Alloys based on titanium

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Ceramic Products (AREA)

Abstract

A preparing method of titanium nitride function sintered alloy for ornaments comprising the step mixing 30wt% or less of one or more of carbide, nitride, boride, oxide to the other titanium nitride, and the step pressing & sintering mixture by the pressure of 1-2 kg/Cm2 under nitrogen atmosphere of 1,600-1,700 deg.C is disclosed. Thereby, it is possible to obtain golden color having high hardness and excellent surface luster.

Description

장식부품용 질화티탄기 소결합금의 제조방법Method of manufacturing titanium nitride base alloy for decorative parts

본 발명은 진노란 황금색을 갖는 질화티탄(이하 "TiN"이라 함)기 소결합금에 관한 것으로, 보다 상세하게는 TiN의 분해를 억제하여 황금색을 얻고 장기간 사용시 변색을 방지하는 등, 내식성, 내마모성, 인성을 좋게 하는 장식부품용 TiN기 소결합금의 제조에 관한 것이다.The present invention relates to a titanium nitride (hereinafter referred to as "TiN") base sintered alloy having a deep yellow golden color, and more particularly, inhibits decomposition of TiN to obtain a golden color and prevents discoloration during long-term use. The present invention relates to the production of TiN base sintered alloy for decorative parts with good toughness.

TiN원료는 황색을 띄고, 내마모성의 특성이 있어 시계용케이스 등의 장식용품에 이용되고 있다.TiN raw materials have a yellow color and wear resistance, and are used in decorative articles such as watch cases.

일반적으로 장식품에 요구되는 성질로서는 표면이 미려하고, 사용중 부식이 없고, 표면경도가 있어야 하며 특히 장기간 사용시 변색이 없어야 되는 등 제조시 균일색상을 얻어야 된다.In general, the characteristics required for the ornament should be a uniform color during manufacture, such as beautiful surface, no corrosion during use, surface hardness, especially no discoloration in long-term use.

TiN을 이용한 선행기술에서, 일본특개소 46-5086호에 따르면, 티탄분말 또는 티탄합금을 성형한 모체로 하고 이를 질화처리 함으로서 그 표면에 TiN박막층을 형성시키고 있다.In the prior art using TiN, according to Japanese Patent Application Laid-Open No. 46-5086, a TiN thin film layer is formed on the surface by forming a matrix of titanium powder or a titanium alloy and nitriding it.

그러나 이와 같은 경우는 제조공정이 번잡하고 장기간 사용시 표면층이 박리되거나 변색될 우려가 있으며, 내마모성에도 문제가 있다.However, in such a case, the manufacturing process is complicated, there is a concern that the surface layer may peel or discolor when used for a long time, and there is a problem in wear resistance.

한편 이와는 달리 탄화탄탈(TaC)가 경질 소결합금과 같은 레몬계의 금색을 갖기 위한 TiN기 경질소결합금이 일본 특개소 56-9342호에서 제안되고 있다.On the other hand, TiN-based hard nitrogen bonds for tantalum carbide (TaC) to have a lemon-like gold color such as hard bovine alloys have been proposed in Japanese Patent Laid-Open No. 56-9342.

이에 따르면 TiN를 기로하고 여기에 각종 탄화물을 첨가하여 소결체 제조시 탄소를 제거해 주는 역할을 하는 TiH2를 첨가하므로서 저탄소 합금을 만들고, 소결시는 저압(0.1 기압) 또는 고진공에 의한 소결로서 이 경우 TiN은 분해되어 탄화물에 의한 색상을 얻고 있다.According to this, a low carbon alloy is formed by adding TiH 2, which adds various carbides, and removes carbon in the production of sintered compacts, and makes sintering by low pressure (0.1 atm) or high vacuum during sintering. Silver is decomposed to obtain a color due to carbide.

본 발명은 상기한 선행기술인 탄소저하에 의한 색상유지와는 달리 색상자체를 TiN의 고유색상에서 얻고 있으며 이를 위해 질소분위기로 가압소결함에 따라 높은 경도, 경면 광택 및 색상이 변색되지 않는 황금색을 갖는 각종 장식용 부품에 적용되는 소결합금체를 제공하고자 하는데 그 목적이 있다.The present invention obtains the color itself from the intrinsic color of TiN, unlike the color maintenance by the carbon reduction, which is the above-described prior art. It is an object of the present invention to provide a non-bonded gold body applied to decorative parts.

이하 본 발명을 설명한다.Hereinafter, the present invention will be described.

본 발명은 TiN을 주원료로 하고 여기에 탄화물, 질화물, 붕화물, 산화물중 1종 또는 2종이상 첨가하고 필요에 따라 Ni, Co 첨가하여 질소분위기에서 가압소결하는 제조공정으로 이루어진다.The present invention consists of TiN as a main raw material, and one or two or more of carbides, nitrides, borides and oxides are added thereto, and Ni and Co are added as necessary to pressurize and sinter in a nitrogen atmosphere.

상기 구성에서 전체 100중량% 중 첨가제(탄화물, 질화물, 붕화물, 산화물, Ni, Co)는 30중량% 이하이고 나머지는 주원료인 TiN으로 이루어진다.In the above configuration, the additive (carbide, nitride, boride, oxide, Ni, Co) of the total 100% by weight is 30% by weight or less, and the rest is composed of TiN, which is the main raw material.

상기한 첨가제중에는 여러가지 이용될 수 있으나 탄화물은 TaC, NbC, TiC, 질화물은 AIN, TaN, NbN, 붕화물은 TiB2, TaB2, NbB2, 산화물은 Al2O3, Zro2, Cr2O3, Fe2O3, CoO, NiO, In2O3, Ta2O3등이 바람직하다.Among the above additives can be used in various ways, but carbides are TaC, NbC, TiC, nitrides are AIN, TaN, NbN, borides TiB 2 , TaB 2 , NbB 2 , oxides are Al 2 O 3 , Zro 2 , Cr 2 O 3 , Fe 2 O 3 , CoO, NiO, In 2 O 3 , Ta 2 O 3, and the like are preferable.

또한 필요에 따라 Ni, Co 등의 천이금속을 첨가하면 충분한 강도를 가지며 소결성이 좋아진다.If necessary, addition of transition metals such as Ni and Co has sufficient strength and good sintering properties.

소결방법은 종전과는 전혀 다른 질소 분위기의 가압소결 방식을 이용한다. 소결은 상온에서 1200℃까지는 진공분위기로 승온하여 시료내의 수분이나 가스성분의 불순물을 제거한후 1200℃ 이후부터 소결온도까지(1,600∼1,700℃)는 질보 분위기로 가압소결한다.The sintering method uses a pressurized sintering method of nitrogen atmosphere which is completely different from the past. The sintering is heated to a vacuum atmosphere from room temperature to 1200 ℃ to remove moisture and gas components impurities in the sample and then press sintered from 1200 ℃ to the sintering temperature (1,600 ~ 1,700 ℃) in a nibbling atmosphere.

이때의 질소압력은 1-10kg/cm2으로 하여 TiN중의 질소성분의 분해(TiN→Ti+1/2 N2)를 억제한다.At this time, the nitrogen pressure was 1-10 kg / cm 2 to suppress decomposition of the nitrogen component (TiN → Ti + 1/2 N2) in TiN.

이와 같은 가압소결방식은 소결시 질소의 분해로 인한 소재자체의 고유색상 보존이 불가능한 문제점을 해결했으며, 황금색상의 소재 제조가 가능하게 된다.This pressure sintering method solved the problem of inability to preserve the intrinsic color of the material itself due to the decomposition of nitrogen during sintering, and it is possible to manufacture a golden color material.

하기(표1) 및 (표2)는 본 발명에 따른 기계적 특성을 나타낸 것이다.Table 1 and Table 2 show the mechanical properties according to the present invention.

여기에서 첨가제가 30중량% 이상일 경우에는 기계적 특성이 제대로 나오지 않음을 알 수 있다.If the additive is more than 30% by weight it can be seen that the mechanical properties do not come out properly.

[표 1]TABLE 1

[표 2]TABLE 2

이와 같은 기계적 성질을 비롯한 황금색을 갖는 본 발명은 높은 경도, 우수한 경면광택, 변색없는 황금색을 얻게 되어 시계 Case, 넥타이핀, 낚시용 등의 부품에 적용가능하다.The present invention having a golden color including such mechanical properties is obtained in high hardness, excellent mirror gloss, without discoloration golden color can be applied to parts such as watch case, tie pin, fishing.

Claims (1)

전체 100중량% 중에서, 첨가제인 탄화물, 질화물, 붕화물, 산화물 중 1종 또는 2종 이상이 30중량%이하이고, 나머지는 주성분인 질화티탄(TiN)으로 조성되게 혼합하여 1,600∼1,700℃의 소결온도에서 질소분위기 및 1∼2kg/cm2의 압력으로 가압소결함을 특징으로 하는 장식부품용 질화티탄기 소결합금의 제조방법.Among 100% by weight, one or two or more of the additives carbide, nitride, boride and oxide are 30% by weight or less, and the remainder is mixed to be composed of titanium nitride (TiN) as a main component and sintered at 1,600 to 1,700 ° C. A method for producing a titanium nitride base sintered alloy for decorative parts, characterized by pressurization and sintering under a nitrogen atmosphere at a temperature of 1 to 2 kg / cm 2 .
KR1019940029891A 1994-11-15 1994-11-15 Method of manufacturing sintered alloy KR970008042B1 (en)

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KR970008042B1 true KR970008042B1 (en) 1997-05-20

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