KR900700630A - Carburized Low Silicon Steel Products and Manufacturing Method Thereof - Google Patents

Carburized Low Silicon Steel Products and Manufacturing Method Thereof

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Publication number
KR900700630A
KR900700630A KR1019890701550A KR890701550A KR900700630A KR 900700630 A KR900700630 A KR 900700630A KR 1019890701550 A KR1019890701550 A KR 1019890701550A KR 890701550 A KR890701550 A KR 890701550A KR 900700630 A KR900700630 A KR 900700630A
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product
carburized
temperature
carburizing
furnace
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KR960005595B1 (en
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쉐릴 에이. 팁톤
게리 디. 케일
그레고리 에스. 할로웨이
데이브 알. 그로미
게리 엘. 빌트겐
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소나 루 홀트
캐퍼필라 인크.
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    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/74Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
    • CCHEMISTRY; METALLURGY
    • C23COATING 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
    • C23CCOATING 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
    • C23C8/00Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C8/06Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
    • C23C8/08Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases only one element being applied
    • C23C8/20Carburising
    • C23C8/22Carburising of ferrous surfaces
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/78Combined heat-treatments not provided for above

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
  • Silicon Compounds (AREA)

Abstract

내용 없음No content

Description

침탄된 저 실리콘 강철 제품 및 그 제조 방법Carburized Low Silicon Steel Products and Manufacturing Method Thereof

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

제1도는 본 발명에 따라 0.1%보다 적은 실리콘을 함유하는 침탄된 저 실리콘 강철 제품의 에칭(etch)되지 않은 단면을 나타내는 750배 확대 현미경사진,1 is a 750x magnification micrograph showing an unetched cross section of a carburized low silicon steel product containing less than 0.1% silicon in accordance with the present invention;

제2도는 제1도에 나타난 에칭 단면을 750배 확대한 혀니경 사진.FIG. 2 is a photomicrograph of an 750-fold magnification of the etching cross section shown in FIG. 1. FIG.

제3도는 제1도의 제품을 침탄시킨 제품의 에칭되지 않은 단면을 나타내는 것으로서, 0.26%실리콘을 포함하는 전형적 침탄 등급인 저 합금 강철로 성형된 제품의 750배 확대 현미경 사진.FIG. 3 shows an unetched cross section of a product which carburized the product of FIG. 1, a 750-fold magnification micrograph of a product molded from low alloy steel, a typical carburizing grade comprising 0.26% silicon.

Claims (18)

대체로 내부입자 산화물이 없으며, 침탄된 표면의 침탄물이 적어도 20%인 강철제품을 성형하는 방법에 있어서, 중량 퍼센트로, 약 0.08%내지 약 0.35%의 탄소, 약 0.3%내지 약 1.7%의 망간, 0.10%를 초과하지 않는 크롬, 약 0.2%내지 약 2.5%의 상기 크롬을 포함하는 탄화물 성형 요소, 6%이하의 부가적 경화능 작용제, 0.1%이하의 정련 요소, 및 나머지는 철 및 불필요한 잔류 요소로 된 물질을 선택하는 단계, 예정된 형태를 갖는 제품을 성형하기 위해 강철 제품을 성형하는 단계, 오오스테나이트 및 상기 오오스테나이트에 분포된 고밀도의 탄화물로 구성된 표면을 위해 설정된 온도에서 상기 제품을 침탄하는 단계 및, 표면 미세 구조를 오오스테나이트 및 탄화물을 보유하는 상태에서 마르텐 사이트로 변형시키기 위해 상기 침탄된 제품을 담금질하는 단계로 구성되는 것을 특징으로 하는 침탄된 표면을 갖는 강철 제품의 성형방법.A method of forming a steel product that is generally free of intergranular oxides and has at least 20% carburized material on the carburized surface, wherein the weight percent is from about 0.08% to about 0.35% carbon, about 0.3% to about 1.7% manganese. , No more than 0.10% chromium, carbide forming elements comprising from about 0.2% to about 2.5% of chromium, up to 6% additional hardening agent, up to 0.1% refining element, and the remainder of iron and unnecessary residue Selecting the material of the urea, forming a steel product to form a product having a predetermined shape, and removing the product at a temperature set for a surface composed of austenite and high density carbides distributed in the austenite Carburizing and quenching the carburized product to transform the surface microstructure into martensite in the presence of austenite and carbides. The method for forming a steel article having a surface, characterized in that the carburization. 제1항에 있어서, 담금질 하기전에, 탄화물의 크기를 증가시키고 탄화물의 표면 점유가 높아지도록 충분한 속도로 침탄온도로부터 상기 강철 물질의 경화 온도로 적어도 침탄된 제품의 표면을 제어 자재하게 냉각하는 단계를 포함하는 것을 특징으로 하는 방법.The method of claim 1, wherein prior to quenching, controlling the cooling of at least the surface of the carburized product from the carburizing temperature to the curing temperature of the steel material at a rate sufficient to increase the size of the carbide and increase the surface occupancy of the carbide. Method comprising a. 제2항에 있어서, 상기 침탄된 제품을 경화 온도로 냉각 시키는 단계가 노 분위기의 온도를 1℉/분(06℃분)내지 20℉/분(11℃/분)의 속도로 낮추는 단계를 포함하는 것을 특징으로 하는 방법.The method of claim 2, wherein cooling the carburized product to a curing temperature comprises lowering the temperature of the furnace atmosphere at a rate of 1 ° F./minute (06 ° C.) to 20 ° F./minute (11 ° C./minute). Characterized in that. 제2항에 있어서, 경화온도로 냉각한 후, 제품의 중심 온도가 상기 경화온도와 평형을 이루도록 충분한 시간 동안 강철 물질의 경화 온도로 상기 침탄된 제품을 유지하는 단계를 포함하는 것을 특징으로 하는 방법.The method of claim 2 including cooling the hardening temperature and then maintaining the carburized product at the hardening temperature of the steel material for a time sufficient to allow the center temperature of the product to be in equilibrium with the hardening temperature. . 제1항에 있어서, 상기 제품을 침탄하는 단계가, 약 1550℉(843℃)내지 약 180℉(1010℃)의 온도를 갖는 예열된 노내에 제품을 위치시키고 탄소 함량이 노 온도에서 탄소로 포화된 오오스테나이트와 평형을 이루는 온도로 유지하고 최종 표면 깊이의 약 75%내지 약 95%로 성형되기에 충분한 시간동안 상기 노내에 유지하는 제1단계를 포함하는 것을 특징으로 하는 방법.The method of claim 1 wherein carburizing the product places the product in a preheated furnace having a temperature of about 1550 ° F. (843 ° C.) to about 180 ° F. (1010 ° C.) and the carbon content is saturated with carbon at the furnace temperature. Maintaining the temperature in equilibrium with the austenitic austenite and maintaining it in the furnace for a time sufficient to form from about 75% to about 95% of the final surface depth. 제5항에 있어서, 상기 제1단계 중에 노의 온도를 약 1700℉(927℃)로 유지하고 상기 제품은 약 4내지 약 5시간 동안 상니노내에 유지하는 것을 특징으로 하는 방법.The method of claim 5, wherein the temperature of the furnace is maintained at about 1700 ° F. (927 ° C.) and the product is maintained in the sanino for about 4 to about 5 hours during the first step. 제5항에 있어서, 침탄 단계가 제1단계 침탄후 상기 제품을 가스담금질 하는 단계를 포함하고, 상기 담금질을 침탄된 표면에서 탄화물핵 생성을 억제하기에 충분한 속도로하고 이러한 속도 비율을 표면 온도가 오오스테나이트의 변형이 기본적으로 완성되는 온도이하로 유지하는 것을 특징으로 하는 방법.6. The method of claim 5, wherein the carburizing step comprises gas quenching the product after the first step carburizing, wherein the quenching is at a rate sufficient to inhibit carbide nucleation at the carburized surface and the rate of surface temperature is reduced. A method characterized in that the deformation of austenite is kept below the temperature at which it is basically completed. 제7항에 있어서, 제품을 침탄하는 단계가 약 1550℉(843℃) 내지 약 1850℉(1010℃)의 온도를 갖는 예열된 노내에 제품을 위치 시키고 탄소함량이 노온도에서 오오스테나이트내의 탄소의 포화한계보다 더 높은 수준에서 유지되는 분위기로 유지하고, 표면을 상기 오오스테나이트에 분포된 고밀도의 표면 탄화물을 갖는 기본적으로 오오스테이나이트 미세구조로 변형시키기에 충분한 시간동안 상기 노내에 유지하는 제2단계를 포함하는 것을 특징으로 하는 방법.8. The method of claim 7, wherein carburizing the product places the product in a preheated furnace having a temperature of about 1550 [deg.] F. (843 [deg.] C.) to about 1850 [deg.] F. (1010 [deg.] C.) and the carbon content in the austenite at the furnace temperature. Maintaining in an atmosphere maintained at a level higher than the saturation limit of and maintaining the surface in the furnace for a time sufficient to transform the surface into an austenite microstructure with a high density of surface carbides distributed over the austenite; A method comprising two steps. 제8항에 있어서, 제2단계중에, 노내의 온도를 약 1700℉(927℃)로 유지하고 약 15분 내지 약 60분 동안 제품을 상기 노내에 유지하는 것을 특징으로 하는 방법.The method of claim 8, wherein during the second step, the temperature in the furnace is maintained at about 1700 ° F. (927 ° C.) and the product is held in the furnace for about 15 to about 60 minutes. 제4항에 있어서, 강철 물질의 강화 온도에서 상기 침탄된 제품을 유지하는 단계가 약 5분 내지 약 60분동안 1540℉(838℃)의 온도에서 제품을 유지하는 단계를 포함하는 것을 특징으로 하는 방법.The method of claim 4, wherein maintaining the carburized product at the strengthening temperature of the steel material comprises maintaining the product at a temperature of 1540 ° F. (838 ° C.) for about 5 to about 60 minutes. Way. 제1항에 있어서, 강철 물질의 경화온도에서 침탄된 제품을 담금질하는 단계가 오일 매질 내에서 담금질하는 단계를 포함하는 것을 특징으로 하는 방법.The method of claim 1, wherein quenching the carburized product at the curing temperature of the steel material comprises quenching in an oil medium. 내부입자 산화물이 존재하지 않고 침탄물이 적어도 20%이상인 침탄된 표면을 갖는 제품을 제공하기위해 저실리콘 강을 침탄하는 방법에 있어서, 제품의 표면상에서 고밀도의 탄화물이 분포된 오오스테나이트를 성형하기에 충분한 온도에서 중량비를 0.10%를 초과하지 않는 실리보 및 1.1%보다 적은 크롬을 갖는 강철로 되어진 제품을 침탄하는 단계 및 다음에 침탄된 표면 미세구조를 오오스테나이트 및 탄화물이 유지되는 상태에서 마르텐사이트로 변형하기 위해 제품을 담금질하는 단계로 구성되어, 내부입자 산화물이 존재하지 않는 표면을 가지며 상기 침탄된 표면의 적어도 20%를 구성하는 탄화물을 갖는 제품을 마련하는 것을 특징으로 하는 방법.A method of carburizing low silicon steel in order to provide a product having a carburized surface having no internal particle oxide and having a carburized surface of at least 20%, in which a high density carbide is formed on the surface of the product. Carburizing a product made of steel having a weight ratio of not more than 0.10% and having a chromium of less than 1.1% at a temperature sufficient for the process, and then carburizing the surface microstructure of the carburized surface with austenite and carbide Quenching the product to deform into a site, providing a product having a surface free of intergranular oxides and having a carbide constituting at least 20% of the carburized surface. 실리콘이 0.1%를 초과하지 않고 1.1%이하의 크롬을 가지며, 유해한 내부입자 산화물이 존재하지 않은 침탄된 표면을 가지며, 상기 침탄된 표면상에 탄화물을 가지며 그 비율은 20%를 구성하는 것을 특징으로하는 침탄된 저 실리콘 강철 제품.Silicon has a carburized surface having no more than 0.1% and less than 1.1% of chromium, no harmful interparticle oxides present, carbides on the carburized surface, the proportion of which constitutes 20% Carburized low silicon steel products. 제13항에 있어서, 침탄된 전체 표면에서 내부입자 산화물이 존재하지 않는 것을 특징으로 하는 침탄된 저 실리콘 강철 제품.14. The carburized low silicon steel product according to claim 13, wherein there is no internal particle oxide in the entire carburized surface. 제13항에 있어서, 제품의 대표적인 횡단면에서의 내부입자 산화물의 총길이가 상기 횡단면에서 제품의 외부 표면 길이의 약 15%를 넘지 않을 것을 특징으로 하는 침탄된 저 실리콘 강철 제품.14. The carburized low silicon steel product of claim 13, wherein the total length of the internal particle oxide in the representative cross section of the article does not exceed about 15% of the length of the outer surface of the article in the cross section. 제13항에 있어서, 제품의 성분이 중량비로 약 0.08% 내지 0.35%의 탄소 및 0.2% 내지 2.5%의 상기 크롬을 포함하는 탄화물 성형 요소를 포함하는 것을 특징으로 하는 침탄된 저 실리콘 강철 제품.14. The carburized low silicon steel article of claim 13, wherein the component of the article comprises a carbide forming element comprising from about 0.08% to 0.35% carbon and 0.2% to 2.5% chromium by weight. 제13항에 있어서, 상기 제품이 중량비로 0.08% 내지 0.35%의 탄소, 0.3% 내지 1.8%의 망간, 0.10%를 넘지않는 실리콘, 1.1%보다 적은 크롬, 0.2%내지 2.5%의 상기 크롬을 포함하는 탄화물 성형 6%보다 적은 부가적 경화능 작용제, 제1%보다 적은 입자 정련 요소, 0.15%를 초과하지 않는 구리, 및 나머지 필수록인 철 및 잔류 요소 성분으로 되어 있는 것을 특징으로 하는 침탄된 저 실리콘 강철 제품.14. The product of claim 13, wherein the product comprises from 0.08% to 0.35% carbon, 0.3% to 1.8% manganese, silicon no greater than 0.10%, less than 1.1% chromium, 0.2% to 2.5% chromium. Carburized low carburizing, characterized in that it consists of less than 6% additional hardenability agent, less than 1% grain refinement element, less than 0.15% copper, and the remaining essential components iron and residual urea components. Silicon steel products. 제17항에 있어서, 탄소양이 0.18% 내지 0.24% 정도 존재하고, 망간 양은 0.8% 내지 1.1%정도 존재하고, 크롬 양은 0.4%내지 1.1% 정도 존재하고, 몰리브덴은 0.1% 내지 0.5%정도 존재하고, 실리콘은 0.05%를 넘지않고, 구리는 0.15%를 넘지 않으며, 잔류요소는 0.05%이하의 인 및 0.08%이하의 황을 포함하는 것을 특징으로 하는 침탄된 강철 제품.18. The method of claim 17, wherein the amount of carbon is present from about 0.18% to 0.24%, the amount of manganese is present in about 0.8% to 1.1%, the amount of chromium is present in about 0.4% to 1.1%, the molybdenum is present in about 0.1% to 0.5% Carburized steel products, characterized in that silicon is not more than 0.05%, copper is not more than 0.15%, residual elements contain less than 0.05% phosphorus and less than 0.08% sulfur. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019890701550A 1987-12-21 1988-12-14 Carburized low silicon steel article and process KR960005595B1 (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US13577587A 1987-12-21 1987-12-21
US8703450 1987-12-21
US87/03450 1987-12-21
US135,775 1987-12-21
PCT/US1988/004470 WO1989005865A1 (en) 1987-12-21 1988-12-14 Carburized low silicon steel article and process

Publications (2)

Publication Number Publication Date
KR900700630A true KR900700630A (en) 1990-08-16
KR960005595B1 KR960005595B1 (en) 1996-04-26

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US7169238B2 (en) 2003-12-22 2007-01-30 Caterpillar Inc Carbide method and article for hard finishing resulting in improved wear resistance
DE102005023952B9 (en) * 2005-05-20 2007-07-26 Carl Aug. Picard Gmbh & Co. Kg Security armor for protection against fire and methods of manufacture
US11624106B2 (en) * 2020-03-18 2023-04-11 Caterpillar Inc. Carburized steel component and carburization process
CN113564515B (en) * 2021-08-05 2023-04-14 常州天山重工机械有限公司 Surface modification process for improving wear resistance of carburizing steel

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CA610554A (en) * 1960-12-13 E. Cullen Orville Carburization of ferrous alloys
US4202710A (en) * 1978-12-01 1980-05-13 Kabushiki Kaisha Komatsu Seisakusho Carburization of ferrous alloys
DE3139622C2 (en) * 1981-10-06 1989-12-14 Joachim Dr.-Ing. 7250 Leonberg Wünning Process for gas carburizing of steel and device for its implementation
JPS5973860A (en) * 1982-10-19 1984-04-26 Toshiba Corp Fuel cell
JPS60138065A (en) * 1983-12-27 1985-07-22 Chugai Ro Kogyo Kaisha Ltd Gas carburizing and quenching method and continuous gas carburizing and quenching equipment
JPH07828B2 (en) * 1984-10-26 1995-01-11 大同特殊鋼株式会社 Carburized parts
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WO1989005865A1 (en) 1989-06-29
AU2913489A (en) 1989-07-19
AU631528B2 (en) 1992-12-03
EP0393137B1 (en) 1996-09-11
CA1300472C (en) 1992-05-12
EP0393137A4 (en) 1991-03-20
EP0393137A1 (en) 1990-10-24
KR960005595B1 (en) 1996-04-26

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