SU730876A1 - Method of chemical-thermal treatment of high-speed and tool steel articles - Google Patents
Method of chemical-thermal treatment of high-speed and tool steel articles Download PDFInfo
- Publication number
- SU730876A1 SU730876A1 SU772492495A SU2492495A SU730876A1 SU 730876 A1 SU730876 A1 SU 730876A1 SU 772492495 A SU772492495 A SU 772492495A SU 2492495 A SU2492495 A SU 2492495A SU 730876 A1 SU730876 A1 SU 730876A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- chemical
- speed
- nitrogen
- thermal treatment
- tool steel
- Prior art date
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Classifications
-
- 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
- C23C8/00—Solid 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
- C23C8/06—Solid 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
- C23C8/28—Solid 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 more than one element being applied in one step
- C23C8/30—Carbo-nitriding
- C23C8/32—Carbo-nitriding of ferrous surfaces
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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)
- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
Description
в контейнер добавл ют пропанбутан 1-2% от общего расхода газовой смеси и осуществл ют изотермическую вьщержку в течение 1,0 ч с непреры&ной подачей газа. Затем в течение 1,0- 1,5 ч в контейнер подают смесь аммиак и азота в соотнощении 1:1, т.е. 48-50% азота и 48-50% аммиака с добавлением пропан-бутана 1-2% по расходу. По истечении , времени выдержки подачу аммиака и пропан-бутана прекращают, контейнер с детал ми выгружают из печи и охлаждают с подачей азота в количестве 3-10 объемов рабочей камеры за час при принудительной циркул ции. Propanbutane is added to the container 1-2% of the total gas mixture flow rate and isothermal is carried out for 1.0 hour with a continuous flow of gas. Then, for 1.0-1.5 h, a mixture of ammonia and nitrogen in the ratio of 1: 1, i.e. 48-50% of nitrogen and 48-50% of ammonia with the addition of propane-butane 1-2% by consumption. After the holding time, the supply of ammonia and propane-butane is stopped, the container with the parts is unloaded from the furnace and cooled with nitrogen in the amount of 3-10 volumes of the working chamber per hour during forced circulation.
Проведение процесса в смеси аммиака , азота и углеводородного газа приводит к формированию в азотированном слое более пластичных включений карбо- нитридной фазы, к увеличению равномер ной переходной зоны, а охлаждение в потоке азота позвол ет предотвратить охрупчивание поверхностного сло за сче деазотизадии сС - твердого раствора.Carrying out the process in a mixture of ammonia, nitrogen and hydrocarbon gas leads to the formation of more plastic inclusions of the carbonitride phase in the nitrated layer, to an increase in the uniform transition zone, and cooling in a stream of nitrogen prevents the surface layer from becoming embrittled due to a solid solution.
После обработки получают диффузионный слой глубиной 0,020-0,050 мм с пластичной карбонитридной зоной на поверхности , твердость которой 1100- Л.2ОО ед, по Виккерсу. При азотировании по известному способу получен слойAfter processing, a diffusion layer is obtained with a depth of 0.020–0.050 mm with a plastic carbonitride zone on the surface, the hardness of which is 1100-L.2OO units, according to Vickers. When nitriding by a known method obtained layer
0,010-0,030 мм с поверхностной тверндостью 1ООО-11ОО ед, по Виккерсу.0,010-0,030 mm with surface hardness 1OOO-11OO units, according to Vickers.
Предлагаемый способ позвол ет повысить изпосостойкость деталей в 2-4 раза и сократить продолжительность процесса в 1,2-1,5 раза.The proposed method makes it possible to increase the wear resistance of parts by 2-4 times and shorten the process time by 1.2-1.5 times.
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU772492495A SU730876A1 (en) | 1977-06-01 | 1977-06-01 | Method of chemical-thermal treatment of high-speed and tool steel articles |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU772492495A SU730876A1 (en) | 1977-06-01 | 1977-06-01 | Method of chemical-thermal treatment of high-speed and tool steel articles |
Publications (1)
Publication Number | Publication Date |
---|---|
SU730876A1 true SU730876A1 (en) | 1980-05-03 |
Family
ID=20711720
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU772492495A SU730876A1 (en) | 1977-06-01 | 1977-06-01 | Method of chemical-thermal treatment of high-speed and tool steel articles |
Country Status (1)
Country | Link |
---|---|
SU (1) | SU730876A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2001055471A1 (en) * | 2000-01-27 | 2001-08-02 | Messer Griesheim Gmbh | Method for carbonitriding high-carbon and high-alloy steels |
-
1977
- 1977-06-01 SU SU772492495A patent/SU730876A1/en active
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2001055471A1 (en) * | 2000-01-27 | 2001-08-02 | Messer Griesheim Gmbh | Method for carbonitriding high-carbon and high-alloy steels |
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