SU433249A1 - METHOD OF STROIEMNTSTA1SCH - Google Patents

METHOD OF STROIEMNTSTA1SCH

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Publication number
SU433249A1
SU433249A1 SU1730348A SU1730348A SU433249A1 SU 433249 A1 SU433249 A1 SU 433249A1 SU 1730348 A SU1730348 A SU 1730348A SU 1730348 A SU1730348 A SU 1730348A SU 433249 A1 SU433249 A1 SU 433249A1
Authority
SU
USSR - Soviet Union
Prior art keywords
nitrogen
parts
carbon
temperature
furnace
Prior art date
Application number
SU1730348A
Other languages
Russian (ru)
Inventor
А.Я.НОВИКОВа изобретени
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed filed Critical
Priority to SU1730348A priority Critical patent/SU433249A1/en
Application granted granted Critical
Publication of SU433249A1 publication Critical patent/SU433249A1/en

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  • Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)

Description

Изобретение относитс  к области химшсо :термической обработки сталей. ИзБвстен способ нитроцементации сталей Е углеродно азотной среде при температуре пор дка 750Однако при таком способе происходит избыточное насыщение поверхности стали азотом на первой стадии формировани  нитроцементного сло ,а именно в процессе нагрева деталей до рабочей температуры и Е течение некоторого времени посче достижени  рабочей температуры . Наступающее вслед за этим диазотирование приводит к образованию в структуре сло  темной составл ющей , что снижает механические свойства издели , Предложенный способ позвол ет повысить прочность и долговечность деталей. Дл  этого нагрев до темпераI . туры обработки Et Еыдершсу в течение 1/4 - 1/5 общей выдержки про вод т в цементационной атмосфере, не содержащей азота. Процесс осуществл ют следующим образом, В печь,нагретую до рабочей температуры,подают карбюризатор , содержащий только углеродистые элементы,и восстанавливаш атмосферу печи. Затем в печь загружают детали.напршу1ер,из стали марок 40Х или 25ХГТ и выдершвашпри температуре 840-870 0 в указанной атмосфере в течение 1/4 1/5 от общей выдержки процесса. При этом происходит науглероживание детали. После этого в печь подают азотирующие компоненты и выдерживают детали в атмосфере, содержащей азот и углерод,до конца процесса. При этом происходит совместное насыщение деталей углеродом и азотом. При общей выдерйже 5-7 час образуетс  слой оТб0 ,7 мм с содержащем углет This invention relates to the field of chemical treatment of heat treatment of steels. The method of nitro-cementation of steels E with carbon-nitrogen medium at a temperature of about 750. However, with this method, the surface of the steel becomes over-saturated with nitrogen in the first stage of formation of the nitro-cement layer, namely during heating of parts to the working temperature and E for some time to reach the working temperature. The subsequent diazotization leads to the formation of a dark component in the layer structure, which reduces the mechanical properties of the product. The proposed method allows to increase the strength and durability of parts. To do this, heat to tempera. The treatment process with Et Ederschu during 1/4 - 1/5 of the total exposure is carried out in a nitrogen-free cementation atmosphere. The process is carried out as follows. A carburizer containing only carbon elements is fed to the furnace heated to operating temperature, and the furnace atmosphere is restored. Then the parts are loaded into the furnace. A steel grinder, made of steel grades 40X or 25HGT and finished at a temperature of 840-870 0 in the specified atmosphere for 1/4 1/5 of the total holding of the process. When this happens carburizing parts. After that, nitriding components are fed into the furnace and the parts are kept in an atmosphere containing nitrogen and carbon until the end of the process. When this occurs, the joint saturation of parts with carbon and nitrogen. With a total runoff of 5-7 hours, a layer of 7.0 mm is formed with the containing carbon

ЭДа твер0 ,85 и азота 0.3,имещи1 дость 58-60 Но,EDA hard, 85 and nitrogen 0.3, available 58-60 But,

Отсутствие избыточного насыщени  стали азотом на первой стадии формировани  нитроцементоваН ного сло  позвол ет значительно повысить прочность и долговечсть деталей.The absence of excessive saturation of the steel with nitrogen in the first stage of the formation of the nitrile-cement layer makes it possible to significantly increase the strength and durability of the parts.

ПРЕДМЕТ ИЗОБРВТЕЕШ Способ нитроцементации в среARTICLE IZOBRVTEESH Method of carbonitriding in medium

д8 углеродоазотистой смеси при температуре 840-8700С,отличающийс  тем,что,с целью повышени  прочности и долговечности деталей,нагрев до температуры нитроцементации и выдержку в течение I/4-I/5g8 carbon-nitrogen mixture at a temperature of 840-8700С, characterized in that, in order to increase the strength and durability of parts, heating to the carbonitriding temperature and holding for I / 4-I / 5

времени общейвыдержки провод т в утлеродсодержащей среде.the total exposure time is spent in a uterol-containing environment.

SU1730348A 1971-12-28 1971-12-28 METHOD OF STROIEMNTSTA1SCH SU433249A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SU1730348A SU433249A1 (en) 1971-12-28 1971-12-28 METHOD OF STROIEMNTSTA1SCH

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SU1730348A SU433249A1 (en) 1971-12-28 1971-12-28 METHOD OF STROIEMNTSTA1SCH

Publications (1)

Publication Number Publication Date
SU433249A1 true SU433249A1 (en) 1974-06-25

Family

ID=20497821

Family Applications (1)

Application Number Title Priority Date Filing Date
SU1730348A SU433249A1 (en) 1971-12-28 1971-12-28 METHOD OF STROIEMNTSTA1SCH

Country Status (1)

Country Link
SU (1) SU433249A1 (en)

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