SU885339A1 - Composition for chromoaluminizing copper and its alloys - Google Patents
Composition for chromoaluminizing copper and its alloys Download PDFInfo
- Publication number
- SU885339A1 SU885339A1 SU802890096A SU2890096A SU885339A1 SU 885339 A1 SU885339 A1 SU 885339A1 SU 802890096 A SU802890096 A SU 802890096A SU 2890096 A SU2890096 A SU 2890096A SU 885339 A1 SU885339 A1 SU 885339A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- copper
- alloys
- composition
- chromoaluminizing
- aluminum
- Prior art date
Links
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
- 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
- C23C10/34—Embedding in a powder mixture, i.e. pack cementation
- C23C10/52—Embedding in a powder mixture, i.e. pack cementation more than one element being diffused in one step
- C23C10/54—Diffusion of at least chromium
- C23C10/56—Diffusion of at least chromium and at least aluminium
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemically Coating (AREA)
Description
(5) СОСТАВ ДЛЯ ХРОМОАЛИТИРОВАНИЯ МЕДИ И ЕЁ СПЛАВОВ(5) COMPOSITION FOR CHROMALIZATION OF COPPER AND ITS ALLOYS
Изобретение относитс к химикотермической обработке меди и ее сплавов в порошковых средах и может быть использовано дл повышени эксплуатационных характеристик изделий из меди и ее сплавов, примен емых в приборостроительной , авиационной и машиностроительной област х техники. Известны составы порошковых насыщающих сред дл насыщени меди алюминием и хромом последовательным способом . Химико-термическа обработка в известных средах позвол ет получить на хромистой бронзе диффузионный слой 200 мкм 1 . Наиболее близким по технической сущности к предлагаемому вл етс сос тав дл хромоалитировани меди и ее сплавов, содержащий, вес.%: 50 At + + 50 Сг 121 В результате термодиффузионной обр ботки меди марки Ml в известном соста ве при 800 С в течение k ч формируетс диффузионный слой толщиной не болееtoo мкм. Снижение температуры химико-термической обработки, в виду того, что при высоких температурах проведени процесса происходит ухудшение механических свойств обрабатываемых изделий, не позвол ет из данного состава получать диффузионные слои достаточной толщины. Цель изобретени - разработка состава дл ди($)фузионного хромоалитирова1 , обеспечивающего получение диффузионных слоев на меди и ее сплавах большей толщины при одновременном снижении температуры проведени процесса химико-термической обработки. Указанна цель достигаетс тем, что в порошковую смесь, содержащую порошок алюмини , дополнительно ввод т порошки окиси алюмини , окиси хрома, олова, меди и хлористого аммони при следующем соотношении ингредиентов, вес.%: Окись алюмини 27 29 Алюминий18-20 , Окись хрома Хлористый аммоний Хромоалитирование в порошковой среде осуществл ют в контейнерах с плавкими затворами. При этом на бронзе MKS-k формируетс диффузионный слой толщиной 620-660 мкм, а на меди марки Ml - мкм.The invention relates to the chemical heat treatment of copper and its alloys in powder media and can be used to improve the performance characteristics of copper products and its alloys used in instrument-making, aviation and engineering areas of technology. Formulations of powdered saturating media for saturating copper with aluminum and chromium in a sequential manner are known. Chemical-thermal treatment in known media makes it possible to obtain a diffusion layer of 200 µm 1 on chromium bronze. The closest in technical essence to the present invention is the composition for chromatising copper and its alloys, containing, wt.%: 50 At + + 50 Cg 121 As a result of thermal diffusion processing of Ml copper in a known composition at 800 C for k h a diffusion layer is formed with a thickness of no more than to microns. Reducing the temperature of chemical heat treatment, in view of the fact that at high temperatures the process leads to a deterioration of the mechanical properties of the processed products, it is not possible to obtain diffusion layers of sufficient thickness from this composition. The purpose of the invention is to develop a composition for di (i) fusion chromo-catalytic 1, which provides diffusion layers on copper and its thicker alloys while reducing the temperature of the process of chemical-thermal processing. This goal is achieved by the addition of alumina, chromium, tin, copper and ammonium oxide powders to the powder mixture containing aluminum powder in the following ratio of ingredients, wt.%: Aluminum oxide 27 29 Aluminum18-20, Chromium oxide Chloride ammonium Powder chromoablation is carried out in containers with fusible closures. In this case, a diffusion layer with a thickness of 620-660 microns is formed on the MKS-k bronze, and on a copper grade Ml, a micron.
Из-вестныйFamous
Ml800Ml800
59 АС + 50 Сг59 AC + 50 Cr
Предлагаемый 8853 5 10 The proposed 8853 5 10
409 394 Составы насыщающих сред и толщина покрытий представлены в таблице. Из приведенных данных следует, что т предлагаемый состав дл хромоалитировани позвол ет увеличить толщину диффузионного сло на меди и ее сплавах в 1.1-1.65 раза при одновременном снижении температуры проведени процесса на 10а°С.409 394 The compositions of saturating media and the thickness of the coatings are presented in the table. It follows from the above data that the proposed composition for chromo-titration makes it possible to increase the thickness of the diffusion layer on copper and its alloys by 1.1-1.65 times while simultaneously reducing the process temperature by 10 ° C.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU802890096A SU885339A1 (en) | 1980-03-04 | 1980-03-04 | Composition for chromoaluminizing copper and its alloys |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU802890096A SU885339A1 (en) | 1980-03-04 | 1980-03-04 | Composition for chromoaluminizing copper and its alloys |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU885339A1 true SU885339A1 (en) | 1981-11-30 |
Family
ID=20881025
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU802890096A SU885339A1 (en) | 1980-03-04 | 1980-03-04 | Composition for chromoaluminizing copper and its alloys |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU885339A1 (en) |
-
1980
- 1980-03-04 SU SU802890096A patent/SU885339A1/en active
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