SU454266A1 - The method of heat treatment of steel products - Google Patents
The method of heat treatment of steel productsInfo
- Publication number
- SU454266A1 SU454266A1 SU1739933A SU1739933A SU454266A1 SU 454266 A1 SU454266 A1 SU 454266A1 SU 1739933 A SU1739933 A SU 1739933A SU 1739933 A SU1739933 A SU 1739933A SU 454266 A1 SU454266 A1 SU 454266A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- heat treatment
- steel products
- cooling
- products
- stage
- Prior art date
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- Heat Treatment Of Articles (AREA)
Description
1one
1-1зобретение относитс к способам термической обработки стальных изделий.1-1 the invention relates to methods for the heat treatment of steel products.
Известен способ термической обработки стальных изделий, включающий аустенизацию и двухстадийное охлаждение с большей скоростью охлаждени на второй стадии.The known method of heat treatment of steel products, including austenization and two-stage cooling with a higher cooling rate in the second stage.
Описываемый способ позвол ет повысить усталостную прочность изделий. Дл этого первую стадию охлаждени ведут в течение 15-120 сек до достижени на поверхности издели температуры 500-650°С.The described method allows to increase the fatigue strength of the products. For this, the first stage of cooling is carried out within 15-120 seconds until the temperature on the product surface reaches 500-650 ° C.
Предлагаемый способ включает аустенизацию , охлаждение в течение 15-120 сек, например , в масле до достижени на поверхности издели температуры 500-650°С, обеспечивающее завершение распада аустенита в Поверхностных сло х при сохранении более высокой температуры сердцевины, и последующее охлаждение до комнатной температуры с большей скоростбю, например, в воде или в водных растворах, обеспечивающее немартенситный распад аустенита в сердцевине издели при создании сжимаюп1,их остаточных напр жений в поверхностных сло х.The proposed method includes austenitization, cooling for 15-120 seconds, for example, in oil, until a temperature of 500-650 ° C is reached on the product surface, ensuring the completion of austenite decomposition in the Surface layers while maintaining a higher core temperature, and subsequent cooling to room temperature with greater velocity, for example, in water or in aqueous solutions, providing non-martensitic decomposition of austenite in the core of the product when creating compression of their residual stresses in the surface layers.
Усталостна прочность образцов диаметром 50 мм с радиусом галтели 1,5 мм из стали 45, определенна на базе циклов, увелпчилать примерно вдвое по сравненпю с усталостной прочностью образцов, подвергнутых закалке и отпуску при 680°С.The fatigue strength of specimens with a diameter of 50 mm and a radius of 1.5 mm of fillets made of steel 45, determined on the basis of cycles, approximately doubled in comparison with the fatigue strength of specimens subjected to quenching and tempering at 680 ° C.
Создание сжимающих остаточных наир жений в поверхностных сло х стальных изделий позвол ет повысить выносливость изделий .The creation of compressive residual lesions in the surface layers of steel products makes it possible to increase the endurance of the products.
Предмет изобретени Subject invention
Способ термической обработки стальных изделий , включающий аустенизацию и двухстадпйное охлаждение с большей скоростью охлаждени на второй стадии, отличающийс тем, что, с целью повышенп усталостной прочности изделий, первую стадию охлаждени производ т в течение 15-120 сек до достижени на поверхности издели температуры 500-650°С.The method of heat treatment of steel products, including austenization and two-stage cooling with a higher cooling rate in the second stage, characterized in that, in order to improve the fatigue strength of products, the first cooling stage is performed within 15-120 seconds before reaching the surface temperature of the product 500- 650 ° C.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU1739933A SU454266A1 (en) | 1972-01-20 | 1972-01-20 | The method of heat treatment of steel products |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU1739933A SU454266A1 (en) | 1972-01-20 | 1972-01-20 | The method of heat treatment of steel products |
Publications (1)
Publication Number | Publication Date |
---|---|
SU454266A1 true SU454266A1 (en) | 1974-12-25 |
Family
ID=20500754
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU1739933A SU454266A1 (en) | 1972-01-20 | 1972-01-20 | The method of heat treatment of steel products |
Country Status (1)
Country | Link |
---|---|
SU (1) | SU454266A1 (en) |
-
1972
- 1972-01-20 SU SU1739933A patent/SU454266A1/en active
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