KR960010886A - Method for manufacturing piston material for excavator - Google Patents

Method for manufacturing piston material for excavator Download PDF

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Publication number
KR960010886A
KR960010886A KR1019940022224A KR19940022224A KR960010886A KR 960010886 A KR960010886 A KR 960010886A KR 1019940022224 A KR1019940022224 A KR 1019940022224A KR 19940022224 A KR19940022224 A KR 19940022224A KR 960010886 A KR960010886 A KR 960010886A
Authority
KR
South Korea
Prior art keywords
minutes
temperature
alloy steel
piston material
excavator
Prior art date
Application number
KR1019940022224A
Other languages
Korean (ko)
Inventor
남철우
정광수
Original Assignee
남철우
정광수
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 남철우, 정광수 filed Critical 남철우
Priority to KR1019940022224A priority Critical patent/KR960010886A/en
Publication of KR960010886A publication Critical patent/KR960010886A/en

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  • Heat Treatment Of Articles (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)

Abstract

본 발명에 따른 제조방법은 니켈-크롬-몰리브덴(Ni-Cr-Mo) 합금강 또는 니켈-크롬-몰리브덴 함금강에 바나듐, 니오비움 원소가 첨가된 합금강 소재의 강을 분위기가스하에서 잔류하는 오스테나이트를 마르텐사이트화 시켜표텬경화의 목적을 달성하고 우수한 기계적 성질을 부여할 수 있으며, 특수한 부위기 가스내에서 예열 침탄 및 서브제도 처리를 수행하여 내부응력 제거가 충분하여 열처리도중 소재에 크랙의 발생율이 현저하게 감소되는 우수한 효과가 있다.The production method according to the present invention is an austenite in which a nickel-chromium-molybdenum (Ni-Cr-Mo) alloy steel or an alloy steel material in which vanadium and niobium elements are added to a nickel-chromium-molybdenum alloy steel is added under atmospheric gas. Martensite can achieve the purpose of surface hardening and impart excellent mechanical properties, and preheat carburization and sub drawing treatment are performed in special site gas so that internal stress removal is sufficient. There is an excellent effect that is reduced.

Description

굴착기용 피스톤재의 제조방법Method of manufacturing piston material for excavator

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

제1도는 본 발명에 따른 제조방법의 공정도.1 is a process chart of the manufacturing method according to the present invention.

제2도는 본 발명에 따른 제조방법의 그래프로서, (a)는 침탄 및 소입 열처리 공정 그래프이고, (b)는 서브제로 처리 및 소려공정 그래프이다.2 is a graph of the manufacturing method according to the present invention, (a) is a carburizing and hardening heat treatment process graph, (b) is a sub-zero treatment and soaking process graph.

Claims (1)

피스톤 소재를 불황성 분위기 가스에서 온도는 920℃±10℃로 약 60분 예열하는 단계:920±10℃로 약 300분 동안 벤젠과 메탄올이 혼합된 분위기 가스에서 침탄 처리를 수행하는 단계;920±10℃로 약 400분 동안 불활성 가스가 충진된 분위기 가스내에서 확산처리를 수행하는 단계;830℃에서 60분 동안 소입하고 70℃±20℃로 냉각시키는 단계, -30℃에서 30분을 유지하고 -60℃로 온도를 하강시켜 60분을 유지하고, -100℃로 온도를 하강하여 60분 동안 온도를 유지하고 -120℃로 온도를 하강시켜 90분을 유지하고 꺼내어 열탕에 침전시키는 서브제로 처리단계;200℃~280℃사이에서 120분간 유지하여 공냉하여 1차 템퍼링을 수행하고, 380℃±10℃ 180분간 2차 템퍼링을 수행하는 템퍼링 단계를 포함하는 것을 특징으로 하는 굴착기용 피스톤재의 제조방법.Preheating the piston material to a temperature of 920 ° C. ± 10 ° C. for about 60 minutes at a temperature of 920 ° C. ± 10 ° C .: performing carburization treatment in an atmosphere gas where benzene and methanol are mixed for about 300 minutes at 920 ± 10 ° C .; Performing diffusion treatment in an atmosphere gas filled with an inert gas for about 400 minutes at 10 ° C .; quenching at 830 ° C. for 60 minutes and cooling to 70 ° C. ± 20 ° C., maintaining 30 minutes at −30 ° C. Maintain 60 minutes by lowering the temperature to -60 ° C, maintain the temperature for 60 minutes by lowering the temperature to -100 ° C, maintain the temperature for 90 minutes by lowering the temperature to -120 ° C Step; Method of manufacturing a piston material for an excavator, characterized in that it comprises a tempering step of performing the first tempering by maintaining the air cooling for 200 minutes between 200 ℃ ~ 280 ℃, 380 ℃ ± 10 ℃ 180 minutes . ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019940022224A 1994-09-05 1994-09-05 Method for manufacturing piston material for excavator KR960010886A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019940022224A KR960010886A (en) 1994-09-05 1994-09-05 Method for manufacturing piston material for excavator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019940022224A KR960010886A (en) 1994-09-05 1994-09-05 Method for manufacturing piston material for excavator

Publications (1)

Publication Number Publication Date
KR960010886A true KR960010886A (en) 1996-04-20

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ID=66686960

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019940022224A KR960010886A (en) 1994-09-05 1994-09-05 Method for manufacturing piston material for excavator

Country Status (1)

Country Link
KR (1) KR960010886A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20010073890A (en) * 2000-01-22 2001-08-03 남철우 Method of the hardening heattreatment by shock quenching in cooling liquid with low degree
KR20020080600A (en) * 2001-04-16 2002-10-26 현대중공업 주식회사 Carburizing Process of Roller Chain Components for Driving the Marine Diesel Engine
KR101386030B1 (en) * 2012-07-09 2014-04-16 한국생산기술연구원 Mold surface caburizing method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20010073890A (en) * 2000-01-22 2001-08-03 남철우 Method of the hardening heattreatment by shock quenching in cooling liquid with low degree
KR20020080600A (en) * 2001-04-16 2002-10-26 현대중공업 주식회사 Carburizing Process of Roller Chain Components for Driving the Marine Diesel Engine
KR101386030B1 (en) * 2012-07-09 2014-04-16 한국생산기술연구원 Mold surface caburizing method

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