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542.464+621.785.616 (1) |
Aplicații ale temperaturilor ridicate și scăzute (2) |
Tehnologie mecanică în general: procese, scule, mașini, aparate (145) |
SM ISO690:2012 POPESCU, Nicolae, COJOCARU, Mihai Ovidiu, MIKHAILOV, Valentin. Experimental Studies on Bulk Tempering of 34CrNiMo6 Steel. In: Электронная обработка материалов, 2012, nr. 1(48), pp. 34-41. ISSN 0013-5739. |
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Электронная обработка материалов | ||||||
Numărul 1(48) / 2012 / ISSN 0013-5739 /ISSNe 2345-1718 | ||||||
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CZU: 542.464+621.785.616 | ||||||
Pag. 34-41 | ||||||
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The class of steels for hardening and tempering, alloyed with chrome, nickel and molybdenum, standardized in Europe (four steel grades), USA (10 grades) and Russia (9 grades) is highly diversified and is especially interesting in the production of machine parts having an extremely large range of dimensions. The heat treatment features of these steels are particularly attractive: high bainitic hardenability and a good temperability etc. The correlation between the hardness achieved after high tempering on products made from these steels, their equivalent diameter and the heat and time parameters of tempering can be explained by means or Jominy samples test for products with equivalent diameters equal to or less than 100 mm, or by the results obtained through the method of simulation of oil cooling (PavarasGheller method) for products with equivalent diameters higher than 100 mm. In this paper, based on experimental results, these correlations are customized for a steel group representative as is 34CrNiMo6. |
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The heat treatment features of these steels are particularly attractive: high bainitic hardenability and a good temperability etc. The correlation between the hardness achieved after high tempering on products made from these steels, their equivalent diameter and the heat and time parameters of tempering can be explained by means or Jominy samples test for products with equivalent diameters equal to or less than 100 mm, or by the results obtained through the method of simulation of oil cooling (PavarasGheller method) for products with equivalent diameters higher than 100 mm. In this paper, based on experimental results, these correlations are customized for a steel group representative as is 34CrNiMo6.</cfAbstr> <cfAbstr cfLangCode='RU' cfTrans='o'>Номенклатура сталей, подвергаемых закалке и отпуску, легированных хромом, никелем, и молибденом, имеющих аналоги в Европе (4 марки), в США (10 марок), и России (9 марок), довольно обширна. Такие стали представляют особый интерес при производстве деталей машин и механизмов различных размеров. Наиболее привлекательны характеристики жаропрочности таких сталей, а именно высокая способность к закаливанию (в случае бейнитной стали), хороший отпуск и др. Корреляции между твердостью деталей из такий сталей, полученных путем высокого отпуска, их эквивалентным диаметром и режимом отпуска (температурой и временем выдержки) можно определить с помощью теста Джомини для деталей с эквивалентным диаметром ≤ 100 мм, либо с помощью моделирования охлаждения в масле (метод Павараса-Геллера) для деталей с эквивалентным диаметром > 100 мм. 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