SU697601A1 - Method of chemical thermal processing of metallic articles - Google Patents
Method of chemical thermal processing of metallic articlesInfo
- Publication number
- SU697601A1 SU697601A1 SU782584566A SU2584566A SU697601A1 SU 697601 A1 SU697601 A1 SU 697601A1 SU 782584566 A SU782584566 A SU 782584566A SU 2584566 A SU2584566 A SU 2584566A SU 697601 A1 SU697601 A1 SU 697601A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- thermal processing
- metallic articles
- chemical thermal
- paste
- layer
- 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
- 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
- C23C8/60—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 solids, e.g. powders, pastes
- C23C8/62—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 solids, e.g. powders, pastes only one element being applied
- C23C8/68—Boronising
- C23C8/70—Boronising of ferrous surfaces
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Sampling And Sample Adjustment (AREA)
Description
ованию в нем трещин или местного тслаивани . В результате этого прочостные качества обработанной поверхости издели улучшаютс . Однако как по способу 1 слой активной пасты анос т на поверхность издели окунаием или кистью, что обуславливает го разную толщину, а следовательно, неравномерное по глубине сло упрочнение поверхности издели . Кроме того , из-за раздельной сушки активного сло и защитной обмазки, обработки защитной обмазки водным раствором хлористого алюмини , а также необходимости отделени нанесенных слоев от издели после его борировани , известный способ обработки достаточно длителен по времени и трудоемок .cracking or cracking in it. As a result, the strength properties of the treated surface of the product are improved. However, as in method 1, an active paste layer is anoshed onto the surface of the product by dipping or brushing, which causes a different thickness and, therefore, uneven depth of the surface of the product. In addition, due to the separate drying of the active layer and the protective coating, the processing of the protective coating with an aqueous solution of aluminum chloride, as well as the need to separate the applied layers from the product after boring, the known method of processing is rather time consuming and laborious.
Цель изобретени - повышение равномерности упрочнени поверхностного сло изделий по глубине и снижение трудоемкости и времени обработки.The purpose of the invention is to improve the uniformity of the hardening of the surface layer of products in depth and reduce the complexity and processing time.
В качестве термостойкого средства берут гибкую ленту, например из стеклоткани. Слой активной пасты нанос т на термостойкую ленту, которую после сушки накладывают на поверхность издели .As a heat-resistant means take a flexible tape, such as fiberglass. A layer of active paste is applied to a heat-resistant tape, which, after drying, is applied to the surface of the product.
Пример, Провод т химико-термическую обработку образцов из стали 20X диаметром 18 мм, длиной 120 мм по известному и предлагаемому способам . Дл этого п ть образцов, каждый в отдельности,окунают в активную пасту,после чего просушивают в сушиль ной камере. Далее окунанием нанос т термостойкое покрытие и также просушивают его, после чего обрабатывают 20-35%-ным водным раствором хлористого алюмини и затем пропускают ток высокой частоты, после чего скребком снимают пасту и защитную обмазку с каждого образца. По предлагаемому способу химико-термообработку провод т также на п ти образцах, дл этого на термостойкую ленту (например , из стеклоткани ГОСТ 8481- 61, ТУБ 1158-67) нанос т слой активной пасты. Ленту пропускают между двум роликами с зазором 2,5-3 мм, чтобы обеспечить равномерный слой активной пасты, и затем просушивают на спокойном воздухе в течение 20- 30 мин. После сушки ленту со стороны активной пасты накладывают на поверхность образцов и нагревают в многовитковом индукторе с внутренним диаметром 32 мм, который подключен к промышленной установке повышенной частоты (8000 Гц). Температура нагрева поверхности детали и выдержки при насыщении lOSO-llOOc, .врем выдержки 2-3 мин. После окончани выдержки образцы охлгикдгшэт ;на воздухе, после чего удал ют стеклоленту с каждого образца.Example: Conduct chemical-thermal treatment of samples of steel 20X with a diameter of 18 mm, a length of 120 mm by the known and proposed methods. To do this, five samples, each separately, are dipped into the active paste, and then dried in a drying chamber. Next, a heat-resistant coating is applied by dipping and also dried, then it is treated with a 20-35% aqueous solution of aluminum chloride and then a high-frequency current is passed, after which the paste and protective coating from each sample are removed with a scraper. According to the proposed method, chemical heat treatment is also carried out on five samples, for this purpose a layer of active paste is applied on a heat-resistant tape (for example, made of GOST 8481-61 glass fabric, TUB 1158-67). The tape is passed between two rollers with a gap of 2.5-3 mm to ensure a uniform layer of active paste, and then dried in calm air for 20-30 minutes. After drying, the ribbon from the side of the active paste is applied to the surface of the samples and heated in a multi-turn inductor with an inner diameter of 32 mm, which is connected to an industrial high frequency unit (8000 Hz). The heating temperature of the surface of the part and the exposure at saturation lOSO-llOOc. The exposure time is 2-3 minutes. After the end of the exposure, the samples are cooled in air, after which the glass tape is removed from each sample.
После химико-термической обработки произведен визуальный осмотр образцов. На поверхности образцов, обработанных по известному способу, видны следы активной пасты и отдельные частицы, прочнослипшиес с поверхностью металла. Остатки пасты удалили и получили удовлетворительную поверхность образцов лишь после кип чени в воде в течение 20 мин. Поверхность образцов, обработанных по предлагаемому способу, серого цвета без следов активной пасты.After chemical heat treatment, a visual inspection of the samples was carried out. On the surface of samples processed by a known method, traces of the active paste and individual particles that are firmly attached to the metal surface are visible. The paste residues were removed and a satisfactory sample surface was obtained only after boiling in water for 20 minutes. The surface of the samples processed by the proposed method, gray in color with no traces of active paste.
Данные металлографического анализа приведены в таблице.The data of metallographic analysis are given in the table.
По предлагаемому способу происходит более равномерное упрочнение поверхностного сло . Кроме того, нет необходимости в площад х дл хранени основных и вспомогательных материалов , служащих дл приготовлени активной пасты, защитной обмазки и состава дл обработки защитной пасты высвобождаютс рабочие зан тые приготовлением термостойкого покрыти , нанесением его на поверхность деталей и обработкой термостойкого покрыти специальным составом; повышаетс производительность труда и культура производства; по вл етс возможность местной химико-термической обработки любой поверхности деталей; стеклолента с нанесенным активным слоем может быть использована дл .однотипных деталей 2-3 раза.The proposed method is more uniform hardening of the surface layer. In addition, there is no need for storage space for basic and auxiliary materials used to prepare the active paste, protective coating and composition for processing the protective paste to release workers engaged in preparing a heat-resistant coating, applying it to the surface of parts and processing the heat-resistant coating with a special composition; labor productivity and production culture increase; the possibility of local chemical-thermal treatment of any surface of the parts appears; fiberglass coated with an active layer can be used for single-type parts 2-3 times.
Лента с нанесенинм слоем активной пасты покрыта целлофановой пленкой и свернута в рулон,может хранитьс на заводском складе.The tape with a layer of active paste coated with plastic film and rolled into a roll, can be stored in the factory warehouse.
Продолжительность химико-термической обработки сократилась в i,S-The duration of chemical heat treatment decreased in i, S-
2 раза, что дает возможность произвести больше и высокого качества упрочненных деталей.2 times, which makes it possible to produce more and high quality hardened parts.
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU782584566A SU697601A1 (en) | 1978-02-20 | 1978-02-20 | Method of chemical thermal processing of metallic articles |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU782584566A SU697601A1 (en) | 1978-02-20 | 1978-02-20 | Method of chemical thermal processing of metallic articles |
Publications (1)
Publication Number | Publication Date |
---|---|
SU697601A1 true SU697601A1 (en) | 1979-11-15 |
Family
ID=20751063
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU782584566A SU697601A1 (en) | 1978-02-20 | 1978-02-20 | Method of chemical thermal processing of metallic articles |
Country Status (1)
Country | Link |
---|---|
SU (1) | SU697601A1 (en) |
-
1978
- 1978-02-20 SU SU782584566A patent/SU697601A1/en active
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