KR960021299A - Method for producing sintered body by metal injection molding that can control carbon content - Google Patents

Method for producing sintered body by metal injection molding that can control carbon content Download PDF

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Publication number
KR960021299A
KR960021299A KR1019940036810A KR19940036810A KR960021299A KR 960021299 A KR960021299 A KR 960021299A KR 1019940036810 A KR1019940036810 A KR 1019940036810A KR 19940036810 A KR19940036810 A KR 19940036810A KR 960021299 A KR960021299 A KR 960021299A
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KR
South Korea
Prior art keywords
carbon content
injection molding
sintered body
temperature
metal
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Application number
KR1019940036810A
Other languages
Korean (ko)
Other versions
KR970002093B1 (en
Inventor
윤태식
안상호
Original Assignee
김만제
포항종합제철 주식회사
신창식
재단법인 산업과학기술연구소
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Application filed by 김만제, 포항종합제철 주식회사, 신창식, 재단법인 산업과학기술연구소 filed Critical 김만제
Priority to KR1019940036810A priority Critical patent/KR970002093B1/en
Publication of KR960021299A publication Critical patent/KR960021299A/en
Application granted granted Critical
Publication of KR970002093B1 publication Critical patent/KR970002093B1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/22—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces for producing castings from a slip
    • B22F3/225—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces for producing castings from a slip by injection molding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
    • B22F1/10—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
    • B22F1/10—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material
    • B22F1/103—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material containing an organic binding agent comprising a mixture of, or obtained by reaction of, two or more components other than a solvent or a lubricating agent
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/10—Sintering only
    • B22F3/1017—Multiple heating or additional steps
    • B22F3/1021—Removal of binder or filler
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F2201/00—Treatment under specific atmosphere
    • B22F2201/01—Reducing atmosphere
    • B22F2201/013—Hydrogen

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Powder Metallurgy (AREA)

Abstract

본 발명은 전자부품, 사무용기, 총기류부품, 및 컴퓨터 부품등에 사용되는 소결체를 금속사출성형법에 의해 제조하는 방법에 관한것으로써, 금속분말로는 탄소함유 철분말 또는 여기에 Ni과 같은 금속이 함유된 혼합금속분말을 사용하고, 결합체로는 폴리아미드계를 사용하여 금속사출성형법에 의해 소결체를 제조함에 있어서, 결합제 제거 및 소결공정에서의 수소와 질소가스의 혼합비를 조절하므로써, 소결체중의 탄소함량을 넓은 범위에 걸쳐 용이하게 제어할 수 있는 금속사출성형법에 의한 소결체의 제조방법을 제공하고자 하는데 그 목적이 있다.The present invention relates to a method for producing a sintered body used in electronic parts, office containers, firearm parts, computer parts, etc. by metal injection molding, wherein the metal powder is a carbon-containing iron powder or a mixture containing a metal such as Ni. In the manufacture of a sintered body by metal injection molding using a metal powder and a polyamide as a binder, the carbon content in the sintered body can be increased by controlling the mixing ratio of hydrogen and nitrogen gas in the binder removal and the sintering process. An object of the present invention is to provide a method for producing a sintered body by a metal injection molding method which can be easily controlled over a range.

Description

탄소함량을 제어할 수 있는 금속사출성형법에 의한 소결체의 제조방법.A method for producing a sintered body by the metal injection molding method capable of controlling the carbon content.

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음As this is a public information case, the full text was not included.

Claims (2)

탄소함유 철분말 또는 여기에 Ni과 같은 금속이 함유된 혼합금속분말과 폴리아미드계 결합제를 혼합하여 사출성형용 혼합체를 만든 다음, 사출성형하여 사출성형체를 제조한 후, 결합제 제거공정 및 소결공정을 거쳐 소결체를 제조하는 방법에 있어서, 상기한 결합제 제거공정이 질소에 수소의 부피비가 75% 이상인 혼합분위기 또는 수소분위기하에서 1℃/분 이하의 승온속도로 280~320℃까지 승온하고, 이 온도에서 0.5~1.5시간 유지하여 결합제 제거와 함께 탈지성형체의 탄소함량이 원료분말 탄소함량이 1~2배가 되도록 행해지고: 그리고 상시 소결공정이 상기 결합제 제거공정에 이어서 질소에 수소의 부피비가 5%이상인 혼합분위기 또는 수소분위기하에서 600~720℃까지 승온하고, 이 온도에서 1시간 이상 유지하여 예비소결과 함께 예비소결체의 탄소함량이 원료분말 탄소함량의 1.5배 이하가 되도록 한 다음, 질소에 수소의 부피비가 25%이하인 혼합가스 분위기하에서 최종 소결온도까지 승온하여 이 온도에서 최종소결 및 목적하는 탄소량의 제어가 이루어지도록 구성됨을 특징으로 하는 탄소함량을 제어할 수 있는 금속사출성형법에 의한 소결체의 제조방법.Iron injection powder containing carbon or mixed metal powder containing metal such as Ni and polyamide-based binder is mixed to make injection molding mixture, and then injection molding to prepare injection molding, and then binder removal and sintering In the method for producing a sintered body, the binder removing step is carried out in a mixed atmosphere or a hydrogen atmosphere in which the volume ratio of hydrogen to nitrogen is 75% or more, and the temperature is raised to 280 to 320 ° C. at a heating rate of 1 ° C./min or less, and at this temperature. The carbon content of the degreasing molded body is maintained to be 1 to 2 times the carbon content of the degreased body by maintaining the binder for 0.5 to 1.5 hours. Alternatively, the carbon content of the pre-sintered body together with the preliminary sintering is maintained by raising the temperature to 600-720 ° C. under a hydrogen atmosphere and maintaining the temperature for at least 1 hour. The raw powder is 1.5 times or less of the carbon content, and the temperature is raised to the final sintering temperature in a mixed gas atmosphere in which the volume ratio of hydrogen to nitrogen is 25% or less, so that final sintering and control of the desired carbon amount are performed at this temperature. A method for producing a sintered body by the metal injection molding method capable of controlling the carbon content. 제1항에 있어서, 출발금속원료 분말의 탄소함량이 0.7~0.9중량%이고, 그리고 최종소결체의 탄소함량이 0.003~0.9% 범위에서 제어되는 것을 특징으로 하는 탄소함량을 제어할 수 있는 금속사출성형법에 의한 소결 체제조방법.The metal injection molding method of claim 1, wherein the carbon content of the starting metal raw material powder is 0.7 to 0.9% by weight, and the carbon content of the final sintered body is controlled in the range of 0.003 to 0.9%. Sintering setup method by ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019940036810A 1994-12-26 1994-12-26 Method of sintering object KR970002093B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019940036810A KR970002093B1 (en) 1994-12-26 1994-12-26 Method of sintering object

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019940036810A KR970002093B1 (en) 1994-12-26 1994-12-26 Method of sintering object

Publications (2)

Publication Number Publication Date
KR960021299A true KR960021299A (en) 1996-07-18
KR970002093B1 KR970002093B1 (en) 1997-02-22

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Application Number Title Priority Date Filing Date
KR1019940036810A KR970002093B1 (en) 1994-12-26 1994-12-26 Method of sintering object

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101230286B1 (en) * 2010-07-19 2013-02-05 베스너 주식회사 Method of controlling carbon content in sintered body made by metal injection molding

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101230286B1 (en) * 2010-07-19 2013-02-05 베스너 주식회사 Method of controlling carbon content in sintered body made by metal injection molding

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Publication number Publication date
KR970002093B1 (en) 1997-02-22

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