SU831815A1 - Method of thermal treatment of hollow articles - Google Patents

Method of thermal treatment of hollow articles Download PDF

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Publication number
SU831815A1
SU831815A1 SU792794899A SU2794899A SU831815A1 SU 831815 A1 SU831815 A1 SU 831815A1 SU 792794899 A SU792794899 A SU 792794899A SU 2794899 A SU2794899 A SU 2794899A SU 831815 A1 SU831815 A1 SU 831815A1
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USSR - Soviet Union
Prior art keywords
tempering
thermal treatment
hollow articles
temperature
products
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SU792794899A
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Russian (ru)
Inventor
Александр Михайлович Абрашкин
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Куйбышевский Политехническийинститут Им. B.B.Куйбышева
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Priority to SU792794899A priority Critical patent/SU831815A1/en
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Description

(54) СПОСОБ ТЕРМИЧЕСКОЙ ОБРАБОТКИ ПОЛЫХ ИЗДЕЛИЙ(54) HEAT TREATMENT METHOD FOR HOLLOW PRODUCTS

Приме p.Нагретые до 840°С кольца из стали ШХ15 диаметром 120 мм с толщиной стенки 12 мм, высотой 25 мм закаливаютс  в воде, затем подвергаютс  отпуску в течение 2 ч при 160°С. Получают твердость HRC 63.Examples are p. Rings made of ShKh15 steel with a diameter of 120 mm with a wall thickness of 12 mm and a height of 25 mm, heated to 840 ° C, are quenched in water, then subjected to tempering for 2 hours at 160 ° C. HRC 63 hardness is obtained.

Дл  получени  сравнительных данных отпуск при нагреве наружной поверхности кольца и охлаждении внутренней проводитс  по трем режимам. Дл  каждого режима измер ют остаточные напр жени  на внутренней поверхности и твердость наружной поверхности и внутреннего сло .In order to obtain comparative data, tempering during heating of the outer surface of the ring and cooling of the inner one is carried out in three modes. For each mode, the residual stresses on the inner surface and the hardness of the outer surface and the inner layer are measured.

В таблице приведены режимы отпуска и механические свойства при нагреве наружной и охлаждении внутренней поверхности кольца.The table shows the modes of tempering and mechanical properties during heating of the outer and cooling of the inner surface of the ring.

У отпущенных таким образом колец подшипников контактна  поверхность с остаточными напр жени ми сжати  обладает более высоким пределом усталостной прочности, а подшипники собранные с применением этих колец, обладают большой работоспособностьюFor bearing rings released in this way, a contact surface with residual compressive stresses has a higher fatigue strength, and bearings assembled using these rings have a high performance.

Создание остаточных напр жений сжати  в зонах , подверженных раст гивающим напр жени м, например, от внутреннегодавлени , позвол ет повысить прочность и надежность работы ответственных деталей, а также снижает трудоемкость их изготовлени , поскольку отпадает надобность в изготовлении бандажных колец, их напрессовке и т.д.The creation of residual compressive stresses in areas prone to tensile stresses, for example, from internal pressure, increases the strength and reliability of critical parts, and also reduces the complexity of their manufacture, since there is no need to manufacture retaining rings, pressing them, etc. d.

Claims (2)

Формула изобретени Invention Formula Способ термической обработки полых изделий, включающий объемнуюThe method of heat treatment of hollow products, including bulk закалку и отпуск при 80-390°С,о т личающийс  тем, что, с целью повышени  усталостной прочности издеЛИЙ путем создани  напр жений сжати  на внутренней их поверхности, после отпуска внешнюю поверхность изделий последовательно нагревают до температуры на 10-650с вышеquenching and tempering at 80-390 ° C, which is the fact that, in order to increase the fatigue strength of the articles by creating compressive stresses on their inner surface, after tempering, the outer surface of the products is subsequently heated to a temperature 10-650s higher температуры отпуска, а внутреннюю поверхность отхлаждают на 10-550°С ниже температуры отпуска.tempering temperature, and the inner surface is cooled down by 10-550 ° С below the tempering temperature. Источники информации, прин тые во внимание при экспертизе.Sources of information taken into account in the examination. 1,Тульцев А.П. Металловедение.1, Tultsev A.P. Metal science. М. , Металлурги ., 1977, с.271-275, рис.217 и 219.M., Metallurgists., 1977, pp. 271-275, fig.217 and 219. 2.ОЗмынов А.А. Справочник термиота . М., Машгиз, 1961, с.96.2.OZmynov A.A. Thermo reference book. M., Mashgiz, 1961, p.96.
SU792794899A 1979-07-13 1979-07-13 Method of thermal treatment of hollow articles SU831815A1 (en)

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SU831815A1 true SU831815A1 (en) 1981-05-23

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5215829A (en) * 1990-01-24 1993-06-01 Hitachi, Ltd. Method for strengthening pressure resistance of a hollowed metallic structure and a pressure resistant structure made thereby

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5215829A (en) * 1990-01-24 1993-06-01 Hitachi, Ltd. Method for strengthening pressure resistance of a hollowed metallic structure and a pressure resistant structure made thereby

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