SU395449A1 - METHOD OF THERMOCYCLIC TREATMENT OF HIGH-STRENGTH IRON - Google Patents
METHOD OF THERMOCYCLIC TREATMENT OF HIGH-STRENGTH IRONInfo
- Publication number
- SU395449A1 SU395449A1 SU1723957A SU1723957A SU395449A1 SU 395449 A1 SU395449 A1 SU 395449A1 SU 1723957 A SU1723957 A SU 1723957A SU 1723957 A SU1723957 A SU 1723957A SU 395449 A1 SU395449 A1 SU 395449A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- strength iron
- treatment
- strength
- point
- thermocyclic
- Prior art date
Links
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- Heat Treatment Of Articles (AREA)
Description
1one
Изобретеагие относитс IK термической обработке лю:бых изделий из высокопрочного чугша с шapo видным графитом.The invention relates to the IK heat treatment of any kind of high-strength chugsha products with visible graphite.
Известен способ термо.ци.кличеокой обработки высокопрочного члтуна, ino которому производ т .многократный, например 8-10 раз нагрев со скоростью выше 40-50° С в минуту , до температур иа 30-35° С ниже точки АС, с последующим охлаждение1М в воде, ма:сле или на воздухе.There is a known method of thermal treatment of high-strength hltun, in which it is made. Multiple, for example, 8-10 times heating with a speed higher than 40-50 ° C per minute, to temperatures 30-35 ° C below the AC point, followed by cooling in water, ma: afterwards or in the air.
Однако этот опосо б 1при.водит только к перераспреаелен ю кремии в металлической оенаве чугуна, что сопровождаетс увеличенне/м оластичности и в зкости.However, this situation only leads to the redistribution of cremation in the metal cast iron, which is accompanied by an increase in viscosity and viscosity.
Цель изобретени - улучшить механические свойст1ва высакопросного чугуна.The purpose of the invention is to improve the mechanical properties of high-quality cast iron.
Это достигаетс тем, что HarpeiB производ т до том1ператур на С выше точки ACi, а охлаждение ведут сначала на воздухе до температур на 30-50° С ниже точки Агь а затем - со скоростью, пре1вышаюш.ей скорость нагрева.This is achieved by the fact that HarpeiB is produced to a temperature of C above the point ACi, and the cooling is first carried out in air to temperatures 30-50 ° C below the point AJ and then at a rate exceeding its heating rate.
Термоцикличбскую обработку высокопрочного чугуна про вод т по сладуюш,вму режиму .Thermocyclic treatment of high-strength cast iron is carried out according to the mode of operation.
Многократный нагрев, апример раз, со скоростью более 30° С в мин до температуры на 30-50° С выше точки ACj, охлажде2Repeated heating, for example, times, with a speed of more than 30 ° C per minute to a temperature 30-50 ° C above the point ACj, cooling2
иие сначала на воздухе до температуры на 30-50° С ниже точки Аг, а зате м в всце или масле. В результате такой термообработки п.тастинчатый перл1ит становитс зернистым, а микроликвацл кремни - благопри тной. Эти измеиени в структуре пр;рвод т к увеличению в зкости и снижен;1Ю критической температуры хладоломкости. Увел1 чи1ваетс также усло1вный предел текучести, зыносливость и пластичность материала.These are first in air to a temperature of 30–50 ° C below the point Ar, and then in m or oil. As a result of this heat treatment, the polystyrene pearlite becomes grainy, and the microloquaceous silicon becomes favorable. These changes in the structure of the pr; are brought to an increase in viscosity and reduced; 1o the critical temperature of cold breakage. The conditional yield stress, stressiness and plasticity of the material are also added.
Дл феррито-перлитного высокопрочного чугуна В4 45-5 оптимальным числоМ тер:моЦИКЛ01В , даюш,им наибольший полол ительный эф.фект, вл етс 8-12.For ferrite-pearlite high-strength cast iron B4 45-5, the optimum number of ter: mocicle1B, daiush, the largest polol effect effect, is 8-12.
Предмет .изобретени Subject matter
Способ термоциклической обработки высокопрочного чугуна, включаюш,ий многократный нагрев со скоростью выше 30° С в минуту и .последующее охлаждение, отличающийс тем, что, с целью улучшени механических свойств, нагрев нроизвод т до те мператур на 30-50° С вы.ше точки АСь а охлаждение ведут сначала на воздухе до температур на 30-50° С точки Агь а затем - со скоростью , превышающей скорость нагрева.The method of thermocyclic treatment of high-strength cast iron, which includes repeated heating at a speed above 30 ° C per minute and subsequent cooling, characterized in that, in order to improve the mechanical properties, the heating is produced to temperatures of 30-50 ° C above points AS and cooling are first conducted in air to temperatures of 30-50 ° C, point Ag and then with a speed exceeding the heating rate.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU1723957A SU395449A1 (en) | 1971-12-13 | 1971-12-13 | METHOD OF THERMOCYCLIC TREATMENT OF HIGH-STRENGTH IRON |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU1723957A SU395449A1 (en) | 1971-12-13 | 1971-12-13 | METHOD OF THERMOCYCLIC TREATMENT OF HIGH-STRENGTH IRON |
Publications (1)
Publication Number | Publication Date |
---|---|
SU395449A1 true SU395449A1 (en) | 1973-08-28 |
Family
ID=20495918
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU1723957A SU395449A1 (en) | 1971-12-13 | 1971-12-13 | METHOD OF THERMOCYCLIC TREATMENT OF HIGH-STRENGTH IRON |
Country Status (1)
Country | Link |
---|---|
SU (1) | SU395449A1 (en) |
-
1971
- 1971-12-13 SU SU1723957A patent/SU395449A1/en active
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