KR930018048A - Method and apparatus for diffusion coating carbide by powder fluidized bed furnace - Google Patents

Method and apparatus for diffusion coating carbide by powder fluidized bed furnace Download PDF

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KR930018048A
KR930018048A KR1019920001725A KR920001725A KR930018048A KR 930018048 A KR930018048 A KR 930018048A KR 1019920001725 A KR1019920001725 A KR 1019920001725A KR 920001725 A KR920001725 A KR 920001725A KR 930018048 A KR930018048 A KR 930018048A
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South Korea
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fluidized bed
coating
powder
gas
supply
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KR1019920001725A
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Korean (ko)
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KR940010773B1 (en
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남기석
박동수
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김훈철
재단법인 한국기계연구소
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    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C10/00—Solid state diffusion of only metal elements or silicon into metallic material surfaces
    • C23C10/28—Solid state diffusion of only metal elements or silicon into metallic material surfaces using solids, e.g. powders, pastes

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Carbon And Carbon Compounds (AREA)
  • Glanulating (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)

Abstract

본 발명은 분말유동층로를 이용 종래 염욕법 및 밀폐용기법등에 의한 VC, NbC, TiC 및 Cr-C등의 탄화물확산 피복의 단점을 개선하므로서 기존의 물리증착법, 화학 중착법등의 다른 방법 보다도 우수한 피복법으로 발전할 수 있도록 한 것이다.The present invention improves the disadvantages of carbide diffusion coating such as VC, NbC, TiC and Cr-C by conventional salt bath method and closed container method using powder fluidized bed furnace, and is superior to other methods such as physical vapor deposition and chemical deposition. It is intended to develop into law.

분말 유동층로를 처리물을 피복하기 위한 상부유동층 그리고 피복에 필요한 할록겐화물을 제조하는 하부유동층을 특징부로 하며, 하부유동층에 있는 피복하고자 하는 원소를 함유하고 있는 합금철 또는 순금속분말이 가스 분산판 직상으로 부터 공급되는 활성화제 염화수소 또는 염화암모늄과 반응하여 피복에 필요한 할로겐화물을 로내에서 직접 제조 상부유동층에 공급하여 처리물에 탄화물 및 질화물을 피복하게 되는 “분말 유동층로에 의해 탄화물을 확산피복하는 방법과 장치”.The powdered fluidized bed furnace is characterized by an upper fluidized bed for coating the treatment and a lower fluidized bed for producing the halogenide required for the coating, wherein the ferroalloy or pure metal powder containing the element to be coated in the lower fluidized bed is a gas dispersion plate. Activation of hydrogen chloride or ammonium chloride supplied directly from the bed to supply the halides required for the coating directly into the furnace to supply the upper fluidized bed, where the carbides are diffused by the powder fluidized bed to cover the carbides and nitrides. Method and device ”.

Description

분말 유동층로에 의해 탄화물을 확산피복하는 방법과 장치Method and apparatus for diffusion coating carbide by powder fluidized bed furnace

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제1도는 분말유동층로 개략구성도, 제2도는 분말유동층로에 의해 VC탄화물이 피복된 시계금형 외관(배율1/2), 제3도는 VC피복층 단면의 광학현미경 조직(배열 400).FIG. 1 is a schematic configuration diagram of a powder fluidized bed, and FIG. 2 is a clock mold appearance (magnification 1/2) coated with a VC carbide by a powdered fluidized bed, and FIG.

Claims (4)

분말유동층이 처리물을 피복하는 상부유동층과 피복에 필요한 피복가스(할로겐화물)를 제조하기 위한 하부 유동층으로 구성되는 것을 특징으로 하는 유동층내에 알곤 또는 수소 가스를 공급 분말을 유동화시켜 800-1200C온도범위로 가열하고 염화수소(HCl) 도는 염화암모늄(Nh4Cl)을 가스분산판 직상의 그로그층에 설치된 활성화제 주입구를 통해 하부유동층에 도입 피복하고자하는 원소와 반응시켜 피복에 필요한 가스상태의 할로겐화물을 로내에서 직접 제조하여 상부유동층에 공급 탄소를 포함하는 소재로 제조된 금형, 절삭공구 및 각종 기계부품에 VC, TiC, Ti(C,N), Cr-C, NbC 및 WC 등의 탄화물을 확산피복 내마모 및 내식성을 향상시키는 “분말유동층로에 의해 탄화물을 확산피복하는 방법”The powder fluidized bed is composed of an upper fluidized bed covering the treatment material and a lower fluidized bed for producing the coating gas (halogen halide) required for the coating. Gaseous halides required for the coating by heating with hydrogen chloride (HCl) or ammonium chloride (Nh 4 Cl) through the activator inlet installed in the glog layer directly above the gas dispersion plate into the lower fluidized bed. Directly in the furnace to diffuse carbides such as VC, TiC, Ti (C, N), Cr-C, NbC and WC into molds, cutting tools and various machine parts made of materials containing feed carbon in the upper fluidized bed "Diffusion coating of carbides by powder fluidized bed furnace" to improve coating wear resistance and corrosion resistance 처리물의 피복을 위한 분말유동상로는 (1)상부유동층, (2)하부 유동층, (3)처리물, (4)레토르트, (5)가스분산판, (6)그로그층, (7)가스실, (8)활성화제주입구, (9)열선, (10)로뚜껑, (11)미소압력계, (12)배기가스관으로 이루어지고 그리고, 유동화가스 및 활성화제 공급을 위한 가스공급반은 (13)활성화제유량제, (14)알곤가스유량계, (15)질소가스유량계, (16)수소가스유량계로 되어 있으며 한편, 피복후 배기되는 유해가스를 제거를 위한 중화장치는 (17)중화조, (18)중화수용액, (19)중화가스배기관으로 구성함을 특징으로 하는 “분말유동층로에 의해 탄화물을 확산 피복하는 장치”.The powder fluidized bed for coating the treated material is (1) upper fluidized bed, (2) lower fluidized bed, (3) treated material, (4) retort, (5) gas dispersion plate, (6) glog layer, (7) Gas chamber, (8) activator inlet, (9) heating wire, (10) furnace lid, (11) micropressure gauge, (12) exhaust gas pipe, and the gas supply unit for fluidization gas and activator supply is (13 The activator flow rate agent, (14) argon gas flow meter, (15) nitrogen gas flow meter, and (16) hydrogen gas flow meter. (18) Neutral solutions, (19) Neutral gas exhaust pipes, characterized in that "a device for diffusing and coating carbides by a powder flow bed". 제1항의 상부유동층분말은 80-120mesh의 알루미나를 사용하며, 하부유동층은 입도 40-80mesh의 알루미나와 동일 크기의 V, Ti, Cr, W 및 Nb 금속분말 또는 그를 함유하는 합금철분말을 사용하고, 그 량은 상부 및 하부 유동층 총중량의 10-25% 그리고 금속 및 합금철분말의 첨가량은 총중량의 5-20%으로 함을 특징으로 하는 “분말유동층로에 의해 탄화물을 확산 피복하는 장치”.The upper fluidized bed powder of claim 1 uses alumina of 80-120mesh, and the lower fluidized bed uses V, Ti, Cr, W and Nb metal powder of the same size as alumina of particle size 40-80mesh or an alloy iron powder containing the same. "Diffuse coating of carbide by powder fluidized bed", characterized in that the amount is 10-25% of the total weight of the upper and lower fluidized beds and the amount of the metal and ferroalloy powder is 5-20% of the total weight. 제1항의 유동화가스공급은 최소유동화를 위한 공급속도의 1-3배로 하며, 활성화제의 공급은 유동화가스 공급량의 1-10체적% 범위내로 함을 특징으로 하는 “분말유동층로에 의해 탄화물을 확산 피복하는 장치”.The fluidized gas supply of claim 1 is 1-3 times the supply speed for the minimum fluidization, and the supply of the activator is within the range of 1-10% by volume of the fluidized gas supply. Cladding device ”. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019920001725A 1992-02-07 1992-02-07 Method of diffusion coating using carbide KR940010773B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114749663A (en) * 2022-04-24 2022-07-15 河南颍川新材料股份有限公司 Preparation method of prealloy powder for superfine alumina coated diamond tool

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114749663A (en) * 2022-04-24 2022-07-15 河南颍川新材料股份有限公司 Preparation method of prealloy powder for superfine alumina coated diamond tool
CN114749663B (en) * 2022-04-24 2023-11-14 河南颍川新材料股份有限公司 Preparation method of prealloy powder for superfine alumina coated diamond tool

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