SU476339A1 - Cementation Method - Google Patents
Cementation MethodInfo
- Publication number
- SU476339A1 SU476339A1 SU1842249A SU1842249A SU476339A1 SU 476339 A1 SU476339 A1 SU 476339A1 SU 1842249 A SU1842249 A SU 1842249A SU 1842249 A SU1842249 A SU 1842249A SU 476339 A1 SU476339 A1 SU 476339A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- atmosphere
- endothermic
- endogas
- furnace
- cementation
- Prior art date
Links
Landscapes
- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
Description
Изобретение относитс к способам цементации , примен емым, например, в металлургической -промышленности и машиностроении .The invention relates to cementation methods used, for example, in the metallurgical industry and mechanical engineering.
Известен способ цементации изделий, заключающийс в нагреве изделий до заданной температуры в эндотермической контролируемой атмосфере с добавкой -природного газа. Однако отмечаетс цизка скорость процесса. Цель изобретени - интенсификаци процесса цементации. По предложенному способу эндотермическую контролируемую атмосферу перед нодачей в печь очишают от двуокиси углерода и шаров воды и обогащают неочищенной эндотермической атмосферой в количестве 5-70% от объема очищенного эндотермического газа.There is a method of cementation of products, which consists in heating the products to a predetermined temperature in an endothermic controlled atmosphere with the addition of natural gas. However, ciss speed is noted. The purpose of the invention is to intensify the process of cementation. According to the proposed method, an endothermic controlled atmosphere is cleaned from carbon dioxide and water bowls before a substitute into the furnace and enriched with an unpurified endothermic atmosphere in an amount of 5-70% of the volume of purified endothermic gas.
Изделие загружают в печь и нагревают до 900-1050°С в атмосфере неочищенного эндогаза с составом, вес. %:The product is loaded into the oven and heated to 900-1050 ° C in the atmosphere of the crude endogas with the composition, weight. %:
СО15-35CO15-35
СОгО- 1,0SOGO- 1.0
Нг 35-45Ng 35-45
СН40,5- 3,0CH40.5- 3.0
АзотОстальноеNitrogenErest
По достижеиии указанной температуры в печь подают эндогаз, очищенный от HgO до точ,ки росы - и содержащий СО2 в пределах 0,001-0,0001 об. %. Кроме того, вUpon reaching the specified temperature, endogas is supplied to the furnace, purified from HgO to the point of quiro, and containing CO2 in the range of 0.001-0,0001 vol. % Besides, in
печь подают неочищенный от влаги и СОа эндогаз в количестве, которое определ етс требуемой величиной углеродного потенциала атмосферы (в пределах от расхода очищенного газа). В указанной атмосфере издели выдерживают дл получени заданной глубины науглероживани .the furnace is supplied with unpurified moisture and COA endogas in an amount that is determined by the required value of the carbon potential of the atmosphere (ranging from the flow rate of purified gas). In this atmosphere, the articles are held to obtain a predetermined carburizing depth.
Пример. Цементаци изделий в проходной печи типа ОКБ-2144. Издели проход т последовательно четыре технологические зоны печи. Во вторую и третью зоны печи подают эндогаз, предварительно пропущенный через адсорберы с цеолитом типа СаА и осушитель с силикагелем. Кроме того, в третью зону подают неочищенный эндогаз в количестве 5- 70% от расхода очищенного эндогаза.Example. Cementation of products in the type OKB-2144 furnace. The products pass successively four process zones of the furnace. The second and third zones of the furnace are fed with endogas, previously passed through adsorbers with CaA-type zeolite and silica gel dryer. In addition, in the third zone serves the crude endogas in the amount of 5-70% of the consumption of purified endogas.
Предмет изобретени Subject invention
Способ цемеитации в газовой среде, содержащей эндотермическую атмосферу, отличающийс тем, что, с целью интенсификации процесса и повышени производительности оборудовани , эндотермическую атмосферу предварительно очищают от двуокиси углерода и паров воды, а затем ее обогащают иеочищенной эндотермической атмосферой в количестве 5н-70% от объема очищенного газа.A method of cementing in a gaseous medium containing an endothermic atmosphere, characterized in that, in order to intensify the process and increase equipment productivity, the endothermic atmosphere is preliminarily cleaned of carbon dioxide and water vapor, and then enriched with an amount of 5N-70% of the total endothermic atmosphere purified gas.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU1842249A SU476339A1 (en) | 1972-10-27 | 1972-10-27 | Cementation Method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU1842249A SU476339A1 (en) | 1972-10-27 | 1972-10-27 | Cementation Method |
Publications (1)
Publication Number | Publication Date |
---|---|
SU476339A1 true SU476339A1 (en) | 1975-07-05 |
Family
ID=20530941
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU1842249A SU476339A1 (en) | 1972-10-27 | 1972-10-27 | Cementation Method |
Country Status (1)
Country | Link |
---|---|
SU (1) | SU476339A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1991002695A1 (en) * | 1989-08-18 | 1991-03-07 | Vsesojuzny Nauchno-Issledovatelsky, Proektno-Konstruktorsky I Tekhnologichesky Institut Elektrotermicheskogo Oborudovania Vniieto | Gas mixture for thermo-chemical treatment of metals and alloys and method of obtaining it |
-
1972
- 1972-10-27 SU SU1842249A patent/SU476339A1/en active
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1991002695A1 (en) * | 1989-08-18 | 1991-03-07 | Vsesojuzny Nauchno-Issledovatelsky, Proektno-Konstruktorsky I Tekhnologichesky Institut Elektrotermicheskogo Oborudovania Vniieto | Gas mixture for thermo-chemical treatment of metals and alloys and method of obtaining it |
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