SU1585347A1 - Method of heat treatment of medium-carbon alloy steels - Google Patents
Method of heat treatment of medium-carbon alloy steels Download PDFInfo
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- SU1585347A1 SU1585347A1 SU884624735A SU4624735A SU1585347A1 SU 1585347 A1 SU1585347 A1 SU 1585347A1 SU 884624735 A SU884624735 A SU 884624735A SU 4624735 A SU4624735 A SU 4624735A SU 1585347 A1 SU1585347 A1 SU 1585347A1
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Abstract
Изобретение относитс к машиностроению и может быть использовано при термической обработке изделий, работающих в сложных услови х нагружени : изгиб, кручение, ударные нагрузки. Цель изобретени - повышение эксплуатационных свойств. Изделие из стали 20Х2Н4А аустенитизировали при 900°С, охлаждали первоначально со скоростью 300°С/с до T 1=400°C [T 1=B H+50°C)-(B H-50°C)], далее охлаждали со скоростью 1,5°С/с (V=B H-M H/NΤ) до T 2=330°C [T 2=M H - (M H-20°C)], затем охлаждали на воздухе, причем B H - максимальна температура начала бейнитного превращени The invention relates to mechanical engineering and can be used in the heat treatment of products operating under difficult loading conditions: bending, torsion, shock loads. The purpose of the invention is to improve the performance properties. The product of steel 20X2H4A was austenitized at 900 ° C, cooled initially at a speed of 300 ° C / s to T 1 = 400 ° C [T 1 = B H + 50 ° C) - (B H-50 ° C)], then cooled at a rate of 1.5 ° C / s (V = B HM H / NΤ) to T 2 = 330 ° C [T 2 = MH - (M H-20 ° C)], then cooled in air, with BH being the maximum bainite transformation start temperature
M H - температура начала мартенситного превращени M H - the temperature of the beginning of the martensitic transformation
Τ - инкубационный период бейнитного превращени Τ - incubation period bainitic transformation
N = 1,2-30. 1 табл.N = 1.2-30. 1 tab.
Description
Изобретение относитс к машиностроению и может быть использовано при термической обработке изделий, работающих в сложных услови х нагру- жени : изгиб, кручение, ударные нагрузки .The invention relates to mechanical engineering and can be used in the heat treatment of products operating under difficult loading conditions: bending, torsion, shock loads.
Цель изобретени - повышение эксплуатационных свойств.The purpose of the invention is to improve the performance properties.
Проводилась термическа обработка изделий из сталей 20Х2НЧА, 27Х2Н2СМ, 40Х2Н2МА. Издели аустенизировали при 850-900 С и охлаждали по различным режимам.Thermal processing was carried out on steel products from 20X2NCA, 27X2H2CM, 40X2H2MA. Products are austenized at 850-900 C and cooled in various modes.
В таблице приведены механические сбойства и структура материала изделий после обработки по предлагаемому, режиму при оптимальных, граничных и запредельных услови х (режимы 1,2,The table shows the mechanical failures and the structure of the material of the products after processing according to the proposed, mode under optimal, boundary and beyond conditions (modes 1,2,
3, 6, 7, 8), а также свойства, имеющиес у изделий, обработанных по известному способу (режимы 4 и 5).3, 6, 7, 8), as well as the properties available for products processed by a known method (modes 4 and 5).
Термообработка по предлагаемому режиму (режим 1, 2, 3) позвол ет получить оптимальную структуру стали, состо щей из регламентированного ко- личества мартенсита, нижнего бейнита и остаточного аустенита, что обеспечивает высокую конструктивную прочность без проведени дополнительного отпуска.Heat treatment according to the proposed mode (mode 1, 2, 3) allows to obtain an optimal steel structure consisting of a regulated amount of martensite, lower bainite and residual austenite, which provides high structural strength without additional tempering.
Термообработка по известному способу (режим 4 и 5) обеспечивает полу- чение в структуре мартенсита и остаточного аустенита, что требует об зательного отпуска,вследствие повыСЛHeat treatment by a known method (mode 4 and 5) ensures the production of martensite and residual austenite in the structure, which requires a mandatory tempering, due to an increase in
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шенной прочности и низкими пластическими и в зкими характеристиками.High strength and low plastic and viscous properties.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU884624735A SU1585347A1 (en) | 1988-10-31 | 1988-10-31 | Method of heat treatment of medium-carbon alloy steels |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU884624735A SU1585347A1 (en) | 1988-10-31 | 1988-10-31 | Method of heat treatment of medium-carbon alloy steels |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU1585347A1 true SU1585347A1 (en) | 1990-08-15 |
Family
ID=21417123
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU884624735A SU1585347A1 (en) | 1988-10-31 | 1988-10-31 | Method of heat treatment of medium-carbon alloy steels |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU1585347A1 (en) |
-
1988
- 1988-10-31 SU SU884624735A patent/SU1585347A1/en active
Non-Patent Citations (1)
| Title |
|---|
| Патент JP № 60-1367, кл. С 21 D 1/78, 1985. * |
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