SU418533A1 - - Google Patents
Info
- Publication number
- SU418533A1 SU418533A1 SU1716059A SU1716059A SU418533A1 SU 418533 A1 SU418533 A1 SU 418533A1 SU 1716059 A SU1716059 A SU 1716059A SU 1716059 A SU1716059 A SU 1716059A SU 418533 A1 SU418533 A1 SU 418533A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- product
- cooling
- products
- cold treatment
- heating
- Prior art date
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Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Landscapes
- Heat Treatment Of Articles (AREA)
Description
СПОСОБ ПОВЕРХНОСТНОЙ ЗАКАЛКИ ИЗДЕЛИЙMETHOD OF SURFACE HANGING OF PRODUCTS
1one
Изобретение относитс к способам поверхностной закалки изделий.The invention relates to methods for surface hardening products.
Известен способ поверхностной закалки изделий , включающий индукционный нагрев и охлаждение. Однако он не обеспечивает удовлетворительной надежности и долговечности изделий, поскольку в закаленном слое возникают значительные термические напр жени , привод щие к образованию микротрещин.There is a method of surface hardening products, including induction heating and cooling. However, it does not provide satisfactory reliability and durability of products, since significant thermal stresses occur in the hardened layer, leading to the formation of microcracks.
По предлагаемому способу непосредственно перед закалкой изделие подвергают обработке холодом. Обработку холодом ведут путем охлаждени издели и последующей заливки хладагента во внутренние полости издели .The proposed method immediately before quenching the product is subjected to cold treatment. The cold treatment is carried out by cooling the product and then pouring the refrigerant into the internal cavities of the product.
Описываемый способ поверхностной закалки включает охлаждение издели непосредственно перед нагревом до криогенных температур (причем при обработке полых деталей после охлаждени в их внутренние полости заливают хладагент, например жидкий азот), индукционный нагрев поверхности и охлаждение (охлаждение происходит, в основном, путем отвода тепла от поверхности в холодные внутренние слои издели ). Способ опробован на образцах сталей Ст. 45, Ст. 50, У7, У12.The described method of surface hardening involves cooling the product immediately before heating to cryogenic temperatures (moreover, when processing hollow parts after cooling, a coolant, for example liquid nitrogen, is poured into their internal cavities), induction heating of the surface and cooling (cooling occurs mainly by removing heat from the surface into the cold inner layers of the product). The method was tested on samples of steel Art. 45, Art. 50, Y7, Y12.
Режим обработки цилиндрических образцов Ст. 45 (диаметр 3,5 см, высота 5 см), включает охлаждение в жидком азоте в течение 10-20 мин. (до прекращени бурного кипени жидкого азота на поверхности образца ), индукционный поверхностный нагрев до 880-910°С (толщина нагретого сло 2,5 мм) и охлаждение. В результате такой обработки толщина поверхностного закаленного сло составл ет 1,7 мин; структура поверхностного сло - мартенсит с твердостью 58-60 HRc, структура переходного сло - ненревращенный феррит и зернистый нерлит, твердость уменьшаетс с глубиной от 57 до 20 HRc.The processing mode of cylindrical samples Art. 45 (diameter 3.5 cm, height 5 cm), includes cooling in liquid nitrogen for 10-20 minutes. (until the rapid boiling of liquid nitrogen on the sample surface), induction surface heating to 880–910 ° С (heated layer thickness 2.5 mm) and cooling. As a result of this treatment, the thickness of the surface quenched layer is 1.7 minutes; the structure of the surface layer is martensite with a hardness of 58-60 HRc, the structure of the transition layer is unconverted ferrite and granular nerlite, the hardness decreases with a depth of 57 to 20 HRc.
Предмет изобретени Subject invention
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU1716059A SU418533A1 (en) | 1971-11-22 | 1971-11-22 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU1716059A SU418533A1 (en) | 1971-11-22 | 1971-11-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU418533A1 true SU418533A1 (en) | 1974-03-05 |
Family
ID=20493519
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU1716059A SU418533A1 (en) | 1971-11-22 | 1971-11-22 |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU418533A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ITMI20090293A1 (en) * | 2009-02-27 | 2010-08-28 | Sipa Nuove Tecnologie Srl | THERMAL TREATMENT AND PLANT FOR THE EXECUTION OF THE SAME. |
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1971
- 1971-11-22 SU SU1716059A patent/SU418533A1/ru active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ITMI20090293A1 (en) * | 2009-02-27 | 2010-08-28 | Sipa Nuove Tecnologie Srl | THERMAL TREATMENT AND PLANT FOR THE EXECUTION OF THE SAME. |
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