SU775170A1 - Steel cyaniding medium - Google Patents
Steel cyaniding medium Download PDFInfo
- Publication number
- SU775170A1 SU775170A1 SU792715243A SU2715243A SU775170A1 SU 775170 A1 SU775170 A1 SU 775170A1 SU 792715243 A SU792715243 A SU 792715243A SU 2715243 A SU2715243 A SU 2715243A SU 775170 A1 SU775170 A1 SU 775170A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- medium
- steel
- cyaniding
- urea
- cyanidation
- 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
- C23C8/40—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 liquids, e.g. salt baths, liquid suspensions
- C23C8/42—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 liquids, e.g. salt baths, liquid suspensions only one element being applied
- C23C8/48—Nitriding
- C23C8/50—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)
- Phenolic Resins Or Amino Resins (AREA)
- Laminated Bodies (AREA)
Description
II
Изобретение относитс к области машиностроени и может быть использовано при химико-термической обработке сталей.The invention relates to the field of mechanical engineering and can be used in the chemical and heat treatment of steels.
Известна среда дл цианировани 5 ванн следующего состава: 8% NaCN, 82% Сасе.. , 10% NaC, позвол юща по- лучить цианированный слой глубиной 0,5-2 мм при температуре обработки 930-960°С и времени 1,5-6 ч l.The known cyanidation medium is 5 baths of the following composition: 8% NaCN, 82% Caca ..., 10% NaC, which allows to obtain a cyanated layer with a depth of 0.5-2 mm at a treatment temperature of 930-960 ° C and a time of 1.5 -6 h l.
Недостатками такой среды вл ютс низка скорость формировани диффузионного сло , а также токсичность расплавов цианистых солей, что требует оснащени процесса герметичным tS оборудованием, специально выделенных помещений.The disadvantages of such an environment are the low rate of formation of the diffusion layer, as well as the toxicity of the molten cyanide salts, which requires equipping the process with a hermetic tS equipment, specially designated rooms.
Известна также мочевиноформа.льдегидна смола 2, выпускаема отечественной промышленностью.. 20Urea-resin is also known. Aldehyde resin 2, produced by domestic industry .. 20
Водные растворы мочевиноформальдегидных смол - это жидкости белого цвета,негорючие и нетоксичные.Примен ютс в деревообрабатывакадей промышленности дл изготовлени клеев,слоистых25 пластиков, обезвоженные смолы - дл изготовлени прессовочных и литых изделий,Aqueous solutions of urea-formaldehyde resins are white, non-combustible and non-toxic liquids. They are used in the woodworking industry of industry for the manufacture of adhesives, laminated 25 plastics, and dehydrated resins for the manufacture of molding and molded products,
Цель изобретени -повышение скорости формировани цианированного сло , 30The purpose of the invention is to increase the rate of formation of the cyanated layer, 30
Поставленна цель достигаетс щзименением в качестве среды дл цианировани сталей мочевиноформальдегидной смолы.This goal is achieved with the use of a urea-formaldehyde resin as a medium for cyanidation of steels.
Высока скорость термодиффузионного насыщени металлов в полимерсодержащих средах объ сн етс комплексом специфических физико-химических процессов , протек,ающих в зоне контакта полимер - металл. При температурах, соответствующих температурам цианировани OOO-IOOO C) , полимерна составл юща деструктирует с образованием различных низкомолекул рных летучих продуктов, активных радикалов и широполимерного остатка. В дальнейшем процесс раз.пожени этих веществ идет с образованием высокой концентрации атомов насыщающих элементов, которые адсорбируютс на поверхности и диффундируют в объем металла,The high rate of thermal diffusion saturation of metals in polymer-containing media is explained by a complex of specific physicochemical processes that take place in the contact zone of the polymer - metal. At temperatures corresponding to the cyanidation temperatures of OOO-IOOO C), the polymer component destructs to form various low molecular weight volatile products, active radicals and a wide polymer residue. Subsequently, the process of decomposition of these substances proceeds with the formation of a high concentration of atoms of saturating elements, which are adsorbed on the surface and diffuse into the bulk of the metal,
В процессе эксплуатации ванны происходит деструкци мочевинофс мальдегидной смолы, и поэтому возникает необходимость в периодической подпитке ванны, котора заключаетс в доливании жидкости в ванну.During the operation of the bath, the urea-maldehyde resin is destroyed, and therefore there is a need for periodic bathing, which consists in adding liquid to the bath.
Пример . В ванну, наполненную мочевиноформальдегидной смолой, погружают цилиндрические образцы ст.12ХНЗА ди 1Мвтром 10 MM и высотой 100 мм. Обраэцы нагревают токами высокой частоты до температур 800-950°С и выдерживают в течение 1-5 мин.An example. In a bath filled with urea-formaldehyde resin, immersed cylindrical samples of Art. 12HNZA di 1 Mvtrom 10 MM and a height of 100 mm. The samples are heated by high-frequency currents to temperatures of 800-950 ° C and maintained for 1-5 minutes.
II
Температура, Врем сботкиTemperature, Time of operation
СпособWay
обра Твердость, I obra Hardness, I
а- I Твердость, Глубина , минHRCIa- I Hardness, Depth, minHRCI
HRCI сло , мкм в таблице представлены результаты по твердости поверхностногО сло и толщине цианированного сло образцов .HRCI layer, micron The table shows the results of the hardness of the surface layer and the thickness of the cyanated layer of the samples.
Результаты проведенных испытаний применени мочевиноформальдегидной, смолы в качестве среды дл цианировани сталей показали, что предлагаема среда значительно ускор ет процессы термодиффузионного цианировани в 6-10 раз по сравнению с известным и обеспечивает равномерное насыщение по всей поверхности образца на глубину 350 мкм в течение 5 мин,The results of tests conducted using urea-formaldehyde resin as a medium for steel cyanidation showed that the proposed medium significantly accelerates the processes of thermal diffusion cyanidation by 6-10 times compared to the known and provides uniform saturation over the entire sample surface to a depth of 350 µm for 5 min,
Применение предлагаемой среды дл цианировани не требует сложного оборудовани , мочеаиноформальдегидна смола нетоксична, не вызывает коррозии сталей, способствует увеличению производительности процессов химико-термической обработки сталеЧ, The use of the proposed cyanidation environment does not require complex equipment, the urea-formaldehyde resin is non-toxic, does not cause corrosion of steels, and increases the productivity of the processes of chemical heat treatment of steel,
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU792715243A SU775170A1 (en) | 1979-01-16 | 1979-01-16 | Steel cyaniding medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU792715243A SU775170A1 (en) | 1979-01-16 | 1979-01-16 | Steel cyaniding medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU775170A1 true SU775170A1 (en) | 1980-10-30 |
Family
ID=20806214
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU792715243A SU775170A1 (en) | 1979-01-16 | 1979-01-16 | Steel cyaniding medium |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU775170A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4509993A (en) * | 1983-01-08 | 1985-04-09 | Degussa Aktiengesellschaft | Regeneration agent for carburization salt bath |
| US5252146A (en) * | 1992-08-24 | 1993-10-12 | Queen's University | Coat-nitrocarburizing of irons and steels |
| RU2801452C2 (en) * | 2018-11-14 | 2023-08-08 | ВАН, Цзяхао | Method for processing soft magnetic metal materials |
| US12071695B2 (en) | 2018-11-14 | 2024-08-27 | Jingran WANG | Method for increasing magnetic induction intensity of soft magnetic metallic materials |
-
1979
- 1979-01-16 SU SU792715243A patent/SU775170A1/en active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4509993A (en) * | 1983-01-08 | 1985-04-09 | Degussa Aktiengesellschaft | Regeneration agent for carburization salt bath |
| US5252146A (en) * | 1992-08-24 | 1993-10-12 | Queen's University | Coat-nitrocarburizing of irons and steels |
| RU2801452C2 (en) * | 2018-11-14 | 2023-08-08 | ВАН, Цзяхао | Method for processing soft magnetic metal materials |
| US12071695B2 (en) | 2018-11-14 | 2024-08-27 | Jingran WANG | Method for increasing magnetic induction intensity of soft magnetic metallic materials |
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