10 research outputs found
ΠΡΠ³Π°Π½ΡΡΠ½Π΅ Π³ΡΠ°Π½ΡΠ»ΡΠΎΠ²Π°Π½Π΅ ΠΊΠΎΠΌΠΏΠ»Π΅ΠΊΡΠ½Π΅ Π±ΡΠΎΠ΄ΠΎΠ±ΡΠΈΠ²ΠΎ
ΠΡΠ³Π°Π½ΡΡΠ½Π΅ Π³ΡΠ°Π½ΡΠ»ΡΠΎΠ²Π°Π½Π΅ ΠΊΠΎΠΌΠΏΠ»Π΅ΠΊΡΠ½Π΅ Π±ΡΠΎΠ΄ΠΎΠ±ΡΠΈΠ²ΠΎ, ΡΠΊΠ΅ ΠΌΡΡΡΠΈΡΡ Π±ΡΠΎΠ³ΡΠΌΡΡ, ΡΡΠ΄ΠΊΠ΅ ΠΎΡΠ³Π°Π½ΡΡΠ½Π΅ Π΄ΠΎΠ±ΡΠΈΠ²ΠΎ Ρ Π²ΠΈΠ³Π»ΡΠ΄Ρ ΠΏΡΡΠ»ΡΡΠΏΠΈΡΡΠΎΠ²ΠΎΡ ΡΠΏΠ°ΡΠ΅Π½ΠΎΡ ΠΌΠ΅Π»ΡΡΠ½ΠΎΡ Π±Π°ΡΠ΄ΠΈ ΡΠ° ΠΏΠΎΠ΄ΡΡΠ±Π½Π΅Π½Ρ ΡΠΎΡΠ»ΠΈΠ½Π½Ρ Π·Π°Π»ΠΈΡΠΊΠΈ.
ΠΡΠΈ ΡΠΈΡΡΠ²Π°Π½Π½Ρ Π΄ΠΎΠΊΡΠΌΠ΅Π½ΡΠ°, Π²ΠΈΠΊΠΎΡΠΈΡΡΠΎΠ²ΡΠΉΡΠ΅ ΠΏΠΎΡΠΈΠ»Π°Π½Π½Ρ http://essuir.sumdu.edu.ua/handle/123456789/1110
Intermittent machining of hardened steels with different types of PcBN cutting tools
The paper discusses the results of the experimental investigation of the performance of several grades of PcBN cutting composites in conditions of the interrupted machining of hardened steel. Both BH and BL types of PcBN indexable inserts with additions of Si3N4, TiC, and TiCN were tested, and cutting speed varied to assess the possibility of applying these cutting tools in different conditions. It has been shown that BL PcBN can be utilized for turning with shock loads in case of high cutting speed and low depth of cut (0,2 mm). While in the range of comparatively low cutting speeds BL cutting tools are actually inoperable, and because of microchipping of polycrystalline fragments and brittle destruction of the cutting edge, an increase of the cutting speed to 210 m/min changes wear pattern and formation of the wear land. As well as this, measurement of the form and values of the cutting forces impulses revealed the effect of their peak growth by up to 40%. The danger of shock impulses was analyzed by FEM modeling, and it was demonstrated that during impacts, the maximal value of the third Principal stress exceeds the average level of compressive stresses during continuous cutting by 1.6 times, which can cause damage to the cutting tool. The data on the estimation of tool fracture probability depending on loading conditions are presented, and the possibility of reducing such probability is shown
ΠΠ±Π΅ΡΡΠΎΠ²ΠΈΠΉ Π²ΡΠ±ΡΠΎΠ³ΡΠ°Π½ΡΠ»ΡΡΠΎΡ ΡΠΎΠ·ΠΏΠ»Π°Π²ΡΠ²
ΠΠΈΠ½Π°Ρ
ΡΠ΄ Π½Π°Π»Π΅ΠΆΠΈΡΡ Π΄ΠΎ Ρ
ΡΠΌΡΡΠ½ΠΎΡ ΠΏΡΠΎΠΌΠΈΡΠ»ΠΎΠ²ΠΎΡΡΡ, Π·ΠΎΠΊΡΠ΅ΠΌΠ° Π΄ΠΎ Π²ΠΈΡΠΎΠ±Π½ΠΈΡΡΠ²Π° Π³ΡΠ°Π½ΡΠ»ΡΠΎΠ²Π°Π½ΠΈΡ
Π°Π·ΠΎΡΠ½ΠΈΡ
Π΄ΠΎΠ±ΡΠΈΠ². ΠΠ±Π΅ΡΡΠΎΠ²ΠΈΠΉ Π²ΡΠ±ΡΠΎΠ³ΡΠ°Π½ΡΠ»ΡΡΠΎΡ ΡΠΎΠ·ΠΏΠ»Π°Π²ΡΠ² ΠΌΡΡΡΠΈΡΡ ΠΊΠΎΡΠΏΡΡ Π· ΠΏΠ°ΡΡΡΠ±ΠΊΠΎΠΌ Π΄Π»Ρ ΠΏΠΎΠ΄Π°ΡΡ ΡΠΎΠ·ΠΏΠ»Π°Π²Ρ, ΠΊΡΠ»ΡΡΠ΅Π²ΠΈΠΉ ΠΊΠΎΠ»Π΅ΠΊΡΠΎΡ Π· ΠΊΡΠ»ΡΡΠ΅Π²ΠΈΠΌ ΠΊΠ°Π½Π°Π»ΠΎΠΌ, Π·Π²ΠΎΡΠΎΡΠ½ΠΈΠΉ ΠΊΠΎΠ½ΡΡ, ΠΏΠ°ΡΡΡΠ±ΠΎΠΊ ΡΠ°Π½Π³Π΅Π½ΡΡΠ°Π»ΡΠ½ΠΎΠ³ΠΎ Π²Π²ΠΎΠ΄Ρ ΡΠΎΠ·ΠΏΠ»Π°Π²Ρ Π² ΠΊΡΠ»ΡΡΠ΅Π²ΠΈΠΉ ΠΊΠΎΠ»Π΅ΠΊΡΠΎΡ, ΡΠΎΠ·ΠΏΠΎΠ΄ΡΠ»ΡΠ½ΠΈΠΊ, ΡΠΈΠ»ΡΠ½Π΄ΡΠΈΡΠ½Ρ ΠΊΠ°ΠΌΠ΅ΡΡ Π· ΠΏΡΠ²ΡΡΠ΅ΡΠΈΡΠ½ΠΈΠΌ ΠΏΠ΅ΡΡΠΎΡΠΎΠ²Π°Π½ΠΈΠΌ Π΄Π½ΠΈΡΠ΅ΠΌ, Π² ΡΠΊΠΎΠΌΡ ΡΠΎΠ·ΡΠ°ΡΠΎΠ²Π°Π½Ρ Π½Π°ΠΏΡΡΠ½Ρ Π»ΠΎΠΏΠ°ΡΠΊΠΈ, ΠΏΡΠΈΡΠΎΠΌΡ ΡΠΈΠ»ΡΠ½Π΄ΡΠΈΡΠ½Π° ΠΊΠ°ΠΌΠ΅ΡΠ° Π· ΠΏΡΠ²ΡΡΠ΅ΡΠΈΡΠ½ΠΈΠΌ ΠΏΠ΅ΡΡΠΎΡΠΎΠ²Π°Π½ΠΈΠΌ Π΄Π½ΠΈΡΠ΅ΠΌ, Π½Π°ΠΏΡΡΠ½ΠΈΠΌΠΈ Π»ΠΎΠΏΠ°ΡΠΊΠ°ΠΌΠΈ ΡΠ° ΡΠΎΠ·ΠΏΠΎΠ΄ΡΠ»ΡΠ½ΠΈΠΊΠΎΠΌ Π·ΠΌΠΎΠ½ΡΠΎΠ²Π°Π½Ρ Π· ΠΌΠΎΠΆΠ»ΠΈΠ²ΡΡΡΡ ΠΎΠ±Π΅ΡΡΠ°Π½Π½Ρ Π²ΡΠ΄ ΠΏΡΠΈΠ²ΠΎΠ΄Ρ, ΡΠΊΠΈΠΉ Π²ΡΡΠ°Π½ΠΎΠ²Π»Π΅Π½ΠΈΠΉ Π² ΠΏΡΠ΄ΡΠΈΠΏΠ½ΠΈΠΊΠΎΠ²ΠΎΠΌΡ Π²ΡΠ·Π»Ρ Π½Π° ΠΏΠΎΡΠΎΠΆΠ½ΠΈΡΡΠΎΠΌΡ Π²Π°Π»Ρ, Π΄ΠΆΠ΅ΡΠ΅Π»ΠΎ Π²ΡΠ±ΡΠ°ΡΡΠΉ Π΄Π»Ρ Π΄ΡΠΎΠ±Π»Π΅Π½Π½Ρ ΡΡΡΡΠΌΠ΅Π½ΡΠ² ΡΠΎΠ·ΠΏΠ»Π°Π²Ρ Π½Π° ΠΊΡΠ°ΠΏΠ»Ρ, ΡΠΎ Π²ΠΊΠ»ΡΡΠ°Ρ Π²ΡΠ±ΡΠ°ΡΠΎΡ ΡΠ° ΡΡΠΎΠΊ ΡΠ· Π΄ΠΈΡΠΊΠΎΠΌ-Π²ΠΈΠΏΡΠΎΠΌΡΠ½ΡΠ²Π°ΡΠ΅ΠΌ Π½Π° ΠΊΡΠ½ΡΡ, ΠΏΡΠΈ ΡΡΠΎΠΌΡ ΠΏΠ°ΡΡΡΠ±ΠΎΠΊ ΡΠ°Π½Π³Π΅Π½ΡΡΠ°Π»ΡΠ½ΠΎΠ³ΠΎ Π²Π²ΠΎΠ΄Ρ ΡΠΎΠ·ΠΏΠ»Π°Π²Ρ Π² ΠΊΠΎΠ»Π΅ΠΊΡΠΎΡ ΡΠΎΠ·ΡΠ°ΡΠΎΠ²Π°Π½ΠΈΠΉ ΡΡΠ΅ΡΠ΅Π΄ΠΈΠ½Ρ ΠΊΠΎΠ»Π΅ΠΊΡΠΎΡΠ°, ΠΏΡΠΈΡΠΎΠΌΡ Π²Π΅ΡΡ
Π½ΡΠΉ ΠΊΡΠ½Π΅ΡΡ Π²ΠΊΠ°Π·Π°Π½ΠΎΠ³ΠΎ ΠΏΠ°ΡΡΡΠ±ΠΊΠ° ΠΆΠΎΡΡΡΠΊΠΎ Π·Π°ΠΊΡΡΠΏΠ»Π΅Π½ΠΈΠΉ Π΄ΠΎ ΠΏΠ°ΡΡΡΠ±ΠΊΠ° Π΄Π»Ρ ΠΏΠΎΠ΄Π°ΡΡ ΡΠΎΠ·ΠΏΠ»Π°Π²Ρ, Π° Π½ΠΈΠΆΠ½ΡΠΉ ΠΉΠΎΠ³ΠΎ ΠΊΡΠ½Π΅ΡΡ ΡΠΎΠ·ΡΠ°ΡΠΎΠ²Π°Π½ΠΈΠΉ Π½Π° Π²ΡΠ΄ΡΡΠ°Π½Ρ Π²ΡΠ΄ ΡΡΡΠ½ΠΊΠΈ ΠΊΠΎΠ»Π΅ΠΊΡΠΎΡΠ° ΡΠ° ΠΏΡΠ΄ ΠΊΡΡΠΎΠΌ 15-20Β° Ρ Π½Π°ΠΏΡΡΠΌΠΊΡ ΠΎΠ±Π΅ΡΡΠ°Π½Π½Ρ ΡΠΈΠ»ΡΠ½Π΄ΡΠΈΡΠ½ΠΎΡ ΠΊΠ°ΠΌΠ΅ΡΠΈ, Π° Π΄Π½ΠΈΡΠ΅ Π²ΠΈΠΊΠΎΠ½Π°Π½Π΅ Π· ΡΡΠ²Π½ΠΎΡ ΠΊΡΡΠ³ΠΎΠ²ΠΎΡ Π½Π΅ΠΏΠ΅ΡΡΠΎΡΠΎΠ²Π°Π½ΠΎΡ ΠΏΠΎΠ²Π΅ΡΡ
Π½Π΅Ρ Π² ΡΠ΅Π½ΡΡΡ, ΠΊΡΡΠΌ ΡΠΎΠ³ΠΎ Π½Π°Π΄ ΡΠΎΠ·ΠΏΠΎΠ΄ΡΠ»ΡΠ½ΠΈΠΊΠΎΠΌ Π²ΡΡΠ°Π½ΠΎΠ²Π»Π΅Π½ΠΈΠΉ ΠΏΠΎΠΏΠ»Π°Π²ΠΎΠΊ, ΡΠΊΠΈΠΉ Π²ΠΈΠΊΠΎΠ½Π°Π½ΠΈΠΉ ΡΠ· Π΄Π²ΠΎΡ
ΡΠ°ΡΡΠΈΠ½ - Π²Π½ΡΡΡΡΡΠ½ΡΠΎΡ, Ρ Π²ΠΈΠ³Π»ΡΠ΄Ρ Π·Π°ΠΌΠΊΠ½Π΅Π½ΠΎΡ ΡΠΌΠ½ΠΎΡΡΡ, Π² ΡΠΊΡΠΉ Π·Π½Π°Ρ
ΠΎΠ΄ΠΈΡΡΡΡ ΠΏΠΎΠ²ΡΡΡΡ, Ρ Π·ΠΎΠ²Π½ΡΡΠ½ΡΠΎΡ - Π³ΠΎΡΠΈΠ·ΠΎΠ½ΡΠ°Π»ΡΠ½ΠΎΡ, Π² ΡΠΊΡΠΉ Π²ΠΈΠΊΠΎΠ½Π°Π½Ρ ΠΎΡΠ²ΠΎΡΠΈ Π΄Π»Ρ ΠΏΡΠΎΡ
ΠΎΠ΄ΠΆΠ΅Π½Π½Ρ Π³Π°Π·Ρ, ΡΠΊΠΈΠΉ Π·Π½Π°Ρ
ΠΎΠ΄ΠΈΡΡΡΡ Ρ Π±ΡΠ»ΡΠ±Π°ΡΠΊΠ°Ρ
ΠΏΡΠ½ΠΈ, ΡΠ° Π³ΠΎΠ»ΠΊΠΈ Π΄Π»Ρ Π·Π½ΠΈΡΠ΅Π½Π½Ρ. Π’Π΅Ρ
Π½ΡΡΠ½ΠΈΠΉ ΡΠ΅Π·ΡΠ»ΡΡΠ°Ρ: Π·Π°Π±Π΅Π·ΠΏΠ΅ΡΡΡΡΡΡΡ ΠΏΡΠ΄Π²ΠΈΡΠ΅Π½Π½Ρ ΡΡΡΠΏΠ΅Π½Ρ ΠΎΡΠΈΡΠ΅Π½Π½Ρ.
ΠΡΠΈ ΡΠΈΡΡΠ²Π°Π½Π½Ρ Π΄ΠΎΠΊΡΠΌΠ΅Π½ΡΠ°, Π²ΠΈΠΊΠΎΡΠΈΡΡΠΎΠ²ΡΠΉΡΠ΅ ΠΏΠΎΡΠΈΠ»Π°Π½Π½Ρ http://essuir.sumdu.edu.ua/handle/123456789/10037ΠΠ·ΠΎΠ±ΡΠ΅ΡΠ΅Π½ΠΈΠ΅ ΠΎΡΠ½ΠΎΡΠΈΡΡΡ ΠΊ Ρ
ΠΈΠΌΠΈΡΠ΅ΡΠΊΠΎΠΉ ΠΏΡΠΎΠΌΡΡΠ»Π΅Π½Π½ΠΎΡΡΠΈ, Π² ΡΠ°ΡΡΠ½ΠΎΡΡΠΈ, ΠΊ ΠΏΡΠΎΠΈΠ·Π²ΠΎΠ΄ΡΡΠ²Ρ Π³ΡΠ°Π½ΡΠ»ΠΈΡΠΎΠ²Π°Π½Π½ΡΡ
Π°Π·ΠΎΡΠ½ΡΡ
ΡΠ΄ΠΎΠ±ΡΠ΅Π½ΠΈΠΉ. ΠΡΠ°ΡΠ°ΡΡΠΈΠΉΡΡ Π²ΠΈΠ±ΡΠΎΠ³ΡΠ°Π½ΡΠ»ΡΡΠΎΡ ΡΠ°ΡΠΏΠ»Π°Π²ΠΎΠ² ΡΠΎΠ΄Π΅ΡΠΆΠΈΡ ΠΊΠΎΡΠΏΡΡ Ρ ΠΏΠ°ΡΡΡΠ±ΠΊΠΎΠΌ Π΄Π»Ρ ΠΏΠΎΠ΄Π°ΡΠΈ ΡΠ°ΡΠΏΠ»Π°Π²Π°, ΠΊΠΎΠ»ΡΡΠ΅Π²ΠΎΠΉ ΠΊΠΎΠ»Π»Π΅ΠΊΡΠΎΡ Ρ ΠΊΠΎΠ»ΡΡΠ΅Π²ΡΠΌ ΠΊΠ°Π½Π°Π»ΠΎΠΌ, ΠΎΠ±ΡΠ°ΡΠ½ΡΠΉ ΠΊΠΎΠ½ΡΡ, ΠΏΠ°ΡΡΡΠ±ΠΎΠΊ ΡΠ°Π½Π³Π΅Π½ΡΠΈΠ°Π»ΡΠ½ΠΎΠ³ΠΎ Π²Π²ΠΎΠ΄Π° ΡΠ°ΡΠΏΠ»Π°Π²Π° Π² ΠΊΠΎΠ»ΡΡΠ΅Π²ΠΎΠΉ ΠΊΠΎΠ»Π»Π΅ΠΊΡΠΎΡ, ΡΠ°ΡΠΏΡΠ΅Π΄Π΅Π»ΠΈΡΠ΅Π»Ρ, ΡΠΈΠ»ΠΈΠ½Π΄ΡΠΈΡΠ΅ΡΠΊΡΡ ΠΊΠ°ΠΌΠ΅ΡΡ Ρ ΠΏΠΎΠ»ΡΡΡΠ΅ΡΠΈΡΠ΅ΡΠΊΠΈΠΌ ΠΏΠ΅ΡΡΠΎΡΠΈΡΠΎΠ²Π°Π½Π½ΡΠΌ Π΄Π½ΠΈΡΠ΅ΠΌ, Π² ΠΊΠΎΡΠΎΡΠΎΠΌ ΡΠ°ΡΠΏΠΎΠ»ΠΎΠΆΠ΅Π½Ρ Π½Π°ΠΏΠΎΡΠ½ΡΠ΅ Π»ΠΎΠΏΠ°ΡΠΊΠΈ, ΠΏΡΠΈΡΠ΅ΠΌ ΡΠΈΠ»ΠΈΠ½Π΄ΡΠΈΡΠ΅ΡΠΊΠ°Ρ ΠΊΠ°ΠΌΠ΅ΡΠ° Ρ ΠΏΠΎΠ»ΡΡΡΠ΅ΡΠΈΡΠ΅ΡΠΊΠΈΠΌ ΠΏΠ΅ΡΡΠΎΡΠΈΡΠΎΠ²Π°Π½Π½ΡΠΌ Π΄Π½ΠΈΡΠ΅ΠΌ, Π½Π°ΠΏΠΎΡΠ½ΡΠΌΠΈ Π»ΠΎΠΏΠ°ΡΠΊΠ°ΠΌΠΈ ΠΈ ΡΠ°ΡΠΏΡΠ΅Π΄Π΅Π»ΠΈΡΠ΅Π»Π΅ΠΌ ΡΠΌΠΎΠ½ΡΠΈΡΠΎΠ²Π°Π½Ρ Ρ Π²ΠΎΠ·ΠΌΠΎΠΆΠ½ΠΎΡΡΡΡ Π²ΡΠ°ΡΠ΅Π½ΠΈΡ ΠΎΡ ΠΏΡΠΈΠ²ΠΎΠ΄Π°, ΠΊΠΎΡΠΎΡΡΠΉ ΡΡΡΠ°Π½ΠΎΠ²Π»Π΅Π½ Π² ΠΏΠΎΠ΄ΡΠΈΠΏΠ½ΠΈΠΊΠΎΠ²ΠΎΠΌ ΡΠ·Π»Π΅ Π½Π° ΠΏΠΎΠ»ΠΎΠΌ Π²Π°Π»Ρ, ΠΈΡΡΠΎΡΠ½ΠΈΠΊ Π²ΠΈΠ±ΡΠ°ΡΠΈΠΉ Π΄Π»Ρ Π΄ΡΠΎΠ±Π»Π΅Π½ΠΈΡ ΡΡΡΡΠΉ ΡΠ°ΡΠΏΠ»Π°Π²Π° Π½Π° ΠΊΠ°ΠΏΠ»ΠΈ, Π²ΠΊΠ»ΡΡΠ°ΡΡΠΈΠΉ Π²ΠΈΠ±ΡΠ°ΡΠΎΡ ΠΈ ΡΡΠΎΠΊ Ρ Π΄ΠΈΡΠΊΠΎΠΌ-ΠΈΠ·Π»ΡΡΠ°ΡΠ΅Π»Π΅ΠΌ Π½Π° ΠΊΠΎΠ½ΡΠ΅, ΠΏΡΠΈ ΡΡΠΎΠΌ ΠΏΠ°ΡΡΡΠ±ΠΎΠΊ ΡΠ°Π½Π³Π΅Π½ΡΠΈΠ°Π»ΡΠ½ΠΎΠ³ΠΎ Π²Π²ΠΎΠ΄Π° ΡΠ°ΡΠΏΠ»Π°Π²Π° Π² ΠΊΠΎΠ»Π»Π΅ΠΊΡΠΎΡ ΡΠ°ΡΠΏΠΎΠ»ΠΎΠΆΠ΅Π½ Π²Π½ΡΡΡΠΈ ΠΊΠΎΠ»Π»Π΅ΠΊΡΠΎΡΠ°, ΠΏΡΠΈΡΠ΅ΠΌ Π²Π΅ΡΡ
Π½ΠΈΠΉ ΠΊΠΎΠ½Π΅Ρ ΡΠΊΠ°Π·Π°Π½Π½ΠΎΠ³ΠΎ ΠΏΠ°ΡΡΡΠ±ΠΊΠ° ΠΆΠ΅ΡΡΠΊΠΎ ΠΏΡΠΈΠΊΡΠ΅ΠΏΠ»Π΅Π½ ΠΊ ΠΏΠ°ΡΡΡΠ±ΠΊΡ Π΄Π»Ρ ΠΏΠΎΠ΄Π°ΡΠΈ ΡΠ°ΡΠΏΠ»Π°Π²Π°, Π° Π½ΠΈΠΆΠ½ΠΈΠΉ Π΅Π³ΠΎ ΠΊΠΎΠ½Π΅Ρ ΡΠ°ΡΠΏΠΎΠ»ΠΎΠΆΠ΅Π½ Π½Π° ΡΠ°ΡΡΡΠΎΡΠ½ΠΈΠΈ ΠΎΡ ΡΡΠ΅Π½ΠΊΠΈ ΠΊΠΎΠ»Π»Π΅ΠΊΡΠΎΡΠ° ΠΈ ΠΏΠΎΠ΄ ΡΠ³Π»ΠΎΠΌ 15-20Β° Π² Π½Π°ΠΏΡΠ°Π²Π»Π΅Π½ΠΈΠΈ Π²ΡΠ°ΡΠ΅Π½ΠΈΡ ΡΠΈΠ»ΠΈΠ½Π΄ΡΠΈΡΠ΅ΡΠΊΠΎΠΉ ΠΊΠ°ΠΌΠ΅ΡΡ, Π° Π΄Π½ΠΈΡΠ΅ Π²ΡΠΏΠΎΠ»Π½Π΅Π½ΠΎ Ρ ΡΠΎΠ²Π½ΠΎΠΉ ΠΊΡΡΠ³ΠΎΠ²ΠΎΠΉ Π½Π΅ΠΏΠ΅ΡΡΠΎΡΠΈΡΠΎΠ²Π°Π½Π½ΠΎΠΉ ΠΏΠΎΠ²Π΅ΡΡ
Π½ΠΎΡΡΡΡ Π² ΡΠ΅Π½ΡΡΠ΅, ΠΊΡΠΎΠΌΠ΅ ΡΠΎΠ³ΠΎ Π½Π°Π΄ ΡΠ°ΡΠΏΡΠ΅Π΄Π΅Π»ΠΈΡΠ΅Π»Π΅ΠΌ ΡΡΡΠ°Π½ΠΎΠ²Π»Π΅Π½ ΠΏΠΎΠΏΠ»Π°Π²ΠΎΠΊ, ΠΊΠΎΡΠΎΡΡΠΉ Π²ΡΠΏΠΎΠ»Π½Π΅Π½ ΠΈΠ· Π΄Π²ΡΡ
ΡΠ°ΡΡΠ΅ΠΉ - Π²Π½ΡΡΡΠ΅Π½Π½Π΅ΠΉ, Π² Π²ΠΈΠ΄Π΅ Π·Π°ΠΌΠΊΠ½ΡΡΠΎΠΉ Π΅ΠΌΠΊΠΎΡΡΠΈ, Π² ΠΊΠΎΡΠΎΡΠΎΠΉ Π½Π°Ρ
ΠΎΠ΄ΠΈΡΡΡ Π²ΠΎΠ·Π΄ΡΡ
, ΠΈ Π²Π½Π΅ΡΠ½Π΅ΠΉ - Π³ΠΎΡΠΈΠ·ΠΎΠ½ΡΠ°Π»ΡΠ½ΠΎΠΉ, Π² ΠΊΠΎΡΠΎΡΠΎΠΉ Π²ΡΠΏΠΎΠ»Π½Π΅Π½Ρ ΠΎΡΠ²Π΅ΡΡΡΠΈΡ Π΄Π»Ρ ΠΏΡΠΎΡ
ΠΎΠΆΠ΄Π΅Π½ΠΈΡ Π³Π°Π·Π°, ΠΊΠΎΡΠΎΡΡΠΉ Π½Π°Ρ
ΠΎΠ΄ΠΈΡΡΡ Π² ΠΏΡΠ·ΡΡΡΠΊΠ°Ρ
ΠΏΠ΅Π½Ρ, ΠΈ ΠΈΠ³Π»Ρ Π΄Π»Ρ ΡΠ½ΠΈΡΡΠΎΠΆΠ΅Π½ΠΈΡ. Π’Π΅Ρ
Π½ΠΈΡΠ΅ΡΠΊΠΈΠΉ ΡΠ΅Π·ΡΠ»ΡΡΠ°Ρ: ΠΎΠ±Π΅ΡΠΏΠ΅ΡΠΈΠ²Π°Π΅ΡΡΡ ΠΏΠΎΠ²ΡΡΠ΅Π½ΠΈΠ΅ ΡΡΠ΅ΠΏΠ΅Π½ΠΈ ΠΎΡΠΈΡΡΠΊΠΈ.
ΠΡΠΈ ΡΠΈΡΠΈΡΠΎΠ²Π°Π½ΠΈΠΈ Π΄ΠΎΠΊΡΠΌΠ΅Π½ΡΠ°, ΠΈΡΠΏΠΎΠ»ΡΠ·ΡΠΉΡΠ΅ ΡΡΡΠ»ΠΊΡ http://essuir.sumdu.edu.ua/handle/123456789/1003
ΠΠ±Π΅ΡΡΠΎΠ²ΠΈΠΉ Π²ΡΠ±ΡΠΎΠ³ΡΠ°Π½ΡΠ»ΡΡΠΎΡ ΡΠΎΠ·ΠΏΠ»Π°Π²ΡΠ²
ΠΠΈΠ½Π°Ρ
ΡΠ΄ Π½Π°Π»Π΅ΠΆΠΈΡΡ Π΄ΠΎ Ρ
ΡΠΌΡΡΠ½ΠΎΡ ΠΏΡΠΎΠΌΠΈΡΠ»ΠΎΠ²ΠΎΡΡΡ, Π·ΠΎΠΊΡΠ΅ΠΌΠ° Π΄ΠΎ Π²ΠΈΡΠΎΠ±Π½ΠΈΡΡΠ²Π° Π³ΡΠ°Π½ΡΠ»ΡΠΎΠ²Π°Π½ΠΈΡ
Π°Π·ΠΎΡΠ½ΠΈΡ
Π΄ΠΎΠ±ΡΠΈΠ². ΠΠ±Π΅ΡΡΠΎΠ²ΠΈΠΉ Π²ΡΠ±ΡΠΎΠ³ΡΠ°Π½ΡΠ»ΡΡΠΎΡ ΡΠΎΠ·ΠΏΠ»Π°Π²ΡΠ² ΠΌΡΡΡΠΈΡΡ ΠΊΠΎΡΠΏΡΡ Π· ΠΏΠ°ΡΡΡΠ±ΠΊΠΎΠΌ Π΄Π»Ρ ΠΏΠΎΠ΄Π°ΡΡ ΡΠΎΠ·ΠΏΠ»Π°Π²Ρ, ΠΊΡΠ»ΡΡΠ΅Π²ΠΈΠΉ ΠΊΠΎΠ»Π΅ΠΊΡΠΎΡ Π· ΠΊΡΠ»ΡΡΠ΅Π²ΠΈΠΌ ΠΊΠ°Π½Π°Π»ΠΎΠΌ, ΡΠΎΠ·ΠΏΠΎΠ΄ΡΠ»ΡΠ½ΠΈΠΊ ΡΠΎΠ·ΠΏΠ»Π°Π²Ρ Π· Π½Π°ΠΏΡΡΠ½ΠΈΠΌΠΈ Π»ΠΎΠΏΠ°ΡΡΠΌΠΈ, ΡΠΈΠ»ΡΠ½Π΄ΡΠΈΡΠ½Ρ ΠΊΠ°ΠΌΠ΅ΡΡ Π· ΠΏΠ΅ΡΡΠΎΡΠΎΠ²Π°Π½ΠΈΠΌ Π΄Π½ΠΈΡΠ΅ΠΌ ΡΠ· Π»ΠΎΠΏΠ°ΡΡΠΌΠΈ, ΡΠΎ ΠΌΠ°Ρ ΠΎΡΠ²ΠΎΡΠΈ Π΄Π»Ρ Π²ΠΈΡΡΠΊΠ°Π½Π½Ρ ΡΠΎΠ·ΠΏΠ»Π°Π²Ρ, ΡΠΎΠ·ΡΠ°ΡΠΎΠ²Π°Π½Ρ Π½Π° ΡΡΠ·Π½ΡΠΉ Π²ΠΈΡΠΎΡΡ Ρ Π½Π° ΡΡΠ·Π½ΠΈΡ
Π²ΡΠ΄ΡΡΠ°Π½ΡΡ
Π²ΡΠ΄ ΠΎΡΡ ΠΎΠ±Π΅ΡΡΠ°Π½Π½Ρ Π΄Π½ΠΈΡΠ°, ΡΠ°ΠΊ, ΡΠΎ ΠΎΡΡ ΠΎΡΠ²ΠΎΡΡΠ² Π²ΠΈΡΡΠΊΠ°Π½Π½Ρ ΡΠΏΡΡΠΌΠΎΠ²Π°Π½Ρ Π² ΡΡΠ·Π½Ρ Π±ΠΎΠΊΠΈ ΠΏΡΠ΄ ΡΡΠ·Π½ΠΈΠΌΠΈ ΠΊΡΡΠ°ΠΌΠΈ Π΄ΠΎ ΠΎΠ±ΡΡΡ, ΡΠΊΡ Π·ΠΌΠΎΠ½ΡΠΎΠ²Π°Π½Ρ Π· ΠΌΠΎΠΆΠ»ΠΈΠ²ΡΡΡΡ ΠΎΠ±Π΅ΡΡΠ°Π½Π½Ρ Π²ΡΠ΄ ΠΏΡΠΈΠ²ΠΎΠ΄Ρ, Π·ΠΌΠΎΠ½ΡΠΎΠ²Π°Π½ΠΎΠ³ΠΎ Π½Π° ΠΏΠΎΡΠΎΠΆΠ½ΠΈΡΡΠΎΠΌΡ Π²Π°Π»Ρ, Π²ΡΡΠ°Π½ΠΎΠ²Π»Π΅Π½ΠΎΠΌΡ Π² ΠΏΡΠ΄ΡΠΈΠΏΠ½ΠΈΠΊΠΎΠ²ΠΎΠΌΡ Π²ΡΠ·Π»Ρ, Π΄ΠΆΠ΅ΡΠ΅Π»ΠΎ Π²ΡΠ±ΡΠ°ΡΡΠΉ Π΄Π»Ρ Π΄ΡΠΎΠ±Π»Π΅Π½Π½Ρ ΡΡΡΡΠΌΠ΅Π½ΡΠ² ΡΠΎΠ·ΠΏΠ»Π°Π²Ρ Π½Π° ΠΊΡΠ°ΠΏΠ»Ρ, ΡΠΎ Π²ΠΊΠ»ΡΡΠ°Ρ Π²ΡΠ±ΡΠ°ΡΠΎΡ Ρ ΡΡΠΎΠΊ ΡΠ· Π΄ΠΈΡΠΊΠΎΠΌ-Π²ΠΈΠΏΡΠΎΠΌΡΠ½ΡΠ²Π°ΡΠ΅ΠΌ Π½Π° ΠΊΡΠ½ΡΡ, ΠΏΡΠΈΡΠΎΠΌΡ ΠΊΡΠ»ΡΡΠ΅Π²ΠΈΠΉ ΠΊΠΎΠ»Π΅ΠΊΡΠΎΡ Π²ΠΈΠΊΠΎΠ½Π°Π½ΠΈΠΉ Π· ΡΠ°Π½Π³Π΅Π½ΡΡΠ°Π»ΡΠ½ΠΈΠΌ ΠΏΠ°ΡΡΡΠ±ΠΊΠΎΠΌ Π΄Π»Ρ ΠΏΠΎΠ΄Π°ΡΡ ΡΠΎΠ·ΠΏΠ»Π°Π²Ρ Π² ΠΊΠΎΠ»Π΅ΠΊΡΠΎΡ, Π° Π΄ΠΎ ΠΊΡΠ»ΡΡΠ΅Π²ΠΎΠ³ΠΎ ΠΊΠΎΠ»Π΅ΠΊΡΠΎΡΠ° ΠΆΠΎΡΡΡΠΊΠΎ Π·Π°ΠΊΡΡΠΏΠ»Π΅Π½ΠΈΠΉ Π·Π²ΠΎΡΠΎΡΠ½ΠΈΠΉ ΠΊΠΎΠ½ΡΡ, ΡΠΎ Π·'ΡΠ΄Π½Π°Π½ΠΈΠΉ Π· ΠΊΡΠ»ΡΡΠ΅Π²ΠΈΠΌ ΠΊΠ°Π½Π°Π»ΠΎΠΌ, ΠΏΡΠΈΡΠΎΠΌΡ ΠΏΠ΅ΡΡΠΎΡΠΎΠ²Π°Π½Π΅ Π΄Π½ΠΈΡΠ΅ Π²ΠΈΠΊΠΎΠ½Π°Π½Π΅ Ρ ΡΠΎΡΠΌΡ ΠΏΡΠ²ΠΊΡΠ»Ρ, Π° Π»ΠΎΠΏΠ°ΡΡ, ΡΠΊΡ Π·ΠΌΠΎΠ½ΡΠΎΠ²Π°Π½Ρ Ρ ΠΏΠ΅ΡΡΠΎΡΠΎΠ²Π°Π½ΠΎΠΌΡ Π΄Π½ΠΈΡΡ, ΡΠΎΠ·ΡΠ°ΡΠΎΠ²Π°Π½Ρ Π· Π·Π°Π·ΠΎΡΠΎΠΌ 2-6 ΠΌΠΌ Π²ΡΠ΄ ΠΉΠΎΠ³ΠΎ Π²Π½ΡΡΡΡΡΠ½ΡΠΎΡ ΠΏΠΎΠ²Π΅ΡΡ
Π½Ρ ΡΠ° ΡΡΡΠ°Π½ΠΎΠ²Π»Π΅Π½Ρ ΠΏΡΠ΄ ΠΊΡΡΠΎΠΌ 10-12Β° Π²ΡΠ΄ ΠΎΡΡ ΠΎΠ±Π΅ΡΡΠ°Π½Π½Ρ, ΠΊΡΡΠΌ ΡΠΎΠ³ΠΎ, Π·ΠΎΠ²Π½ΡΡΠ½ΡΠΉ ΠΊΡΠ°ΠΉ Π»ΠΎΠΏΠ°ΡΠ΅ΠΉ ΠΏΠΎΠ²ΡΠΎΡΡΡ ΡΠΎΡΠΌΡ ΠΏΠ΅ΡΡΠΎΡΠΎΠ²Π°Π½ΠΎΠ³ΠΎ Π΄Π½ΠΈΡΠ°. Π’Π΅Ρ
Π½ΡΡΠ½ΠΈΠΉ ΡΠ΅Π·ΡΠ»ΡΡΠ°Ρ: ΡΠ½ΡΠ΅Π½ΡΠΈΡΡΠΊΠ°ΡΡΡ ΠΏΡΠΎΡΠ΅ΡΡ ΠΎΡ
ΠΎΠ»ΠΎΠ΄ΠΆΠ΅Π½Π½Ρ Π³ΡΠ°Π½ΡΠ», ΡΠΎ ΠΏΡΠ΄Π²ΠΈΡΠΈΡΡ ΡΠΊΡΡΡΡ Π΄ΠΎΠ±ΡΠΈΠ²Π°.
ΠΡΠΈ ΡΠΈΡΡΠ²Π°Π½Π½Ρ Π΄ΠΎΠΊΡΠΌΠ΅Π½ΡΠ°, Π²ΠΈΠΊΠΎΡΠΈΡΡΠΎΠ²ΡΠΉΡΠ΅ ΠΏΠΎΡΠΈΠ»Π°Π½Π½Ρ http://essuir.sumdu.edu.ua/handle/123456789/10058The invention relates to chemical industry, in particular to the production of granulated nitric fertilizers. A rotary vibrogranulator of melts contains a housing with branch pipe for supplying the melt, an annular collector with annular channel, a distributor of melt with pressure blades, a cylindrical chamber with perforated bottom with blades, which has openings for discharge of melt, located at different height and at different distances from the rotational axis of the bottom, thus, that the axes of openings of discharge are directed toward different sides at different angles to the horizon, which are installed with possibility of rotation from a drive installed on a hollow shaft mounted in a bearing unit, a source of vibrations for jet disintegration of the melt into drops, which includes a vibrator and a stock with disk-emitter at the end; moreover the annular collector is made with tangential branch pipe for supplying the melt into the collector, and to the annular collector a reverse cone is rigidly fastened, which is connected with the annular channel; moreover the perforated bottom is made in the form of a hemisphere, and the blades, which are installed in the perforated bottom, are located with a clearance of 2-6 mm from its internal surface and are installed at the angle of 10-12Β° from the rotational axis, furthermore, the external edge of blades follows the shape of perforated bottom. Technical result: intensification of the process of cooling granules, which will increase quality of fertilizer
ΠΡΠΈ ΡΠΈΡΠΈΡΠΎΠ²Π°Π½ΠΈΠΈ Π΄ΠΎΠΊΡΠΌΠ΅Π½ΡΠ°, ΠΈΡΠΏΠΎΠ»ΡΠ·ΡΠΉΡΠ΅ ΡΡΡΠ»ΠΊΡ http://essuir.sumdu.edu.ua/handle/123456789/1005
ΠΡΠ΅Π½ΠΊΠ° ΡΠΊΠΎΠ½ΠΎΠΌΠΈΡΠ΅ΡΠΊΠΎΠΉ ΡΡΡΠ΅ΠΊΡΠΈΠ²Π½ΠΎΡΡΠΈ ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π½ΠΈΡ ΠΌΠΎΠ΄Π΅ΡΠ½ΠΈΠ·ΠΈΡΠΎΠ²Π°Π½Π½ΠΎΠ³ΠΎ Π³ΡΠ°Π½ΡΠ»ΡΡΠΈΠΎΠ½Π½ΠΎΠ³ΠΎ ΠΎΠ±ΠΎΡΡΠ΄ΠΎΠ²Π°Π½ΠΈΡ ΠΏΡΠΈ ΠΏΡΠΎΠΈΠ·Π²ΠΎΠ΄ΡΡΠ²Π΅ Π°Π·ΠΎΡΠ½ΡΡ ΡΠ΄ΠΎΠ±ΡΠ΅Π½ΠΈΠΉ ΠΌΠ΅ΡΠΎΠ΄ΠΎΠΌ ΠΏΡΠΈΠ»Π»ΠΈΡΠΎΠ²Π°Π½ΠΈΡ
Π Π°ΡΡΠΌΠΎΡΡΠ΅Π½Ρ Π²ΠΎΠΏΡΠΎΡΡ Π°ΠΏΠΏΠ°ΡΠ°ΡΡΡΠ½ΠΎΠ³ΠΎ ΠΎΡΠΎΡΠΌΠ»Π΅Π½ΠΈΡ ΠΈ ΡΠ΅Ρ
Π½ΠΎΠ»ΠΎΠ³ΠΈΠΈ ΠΏΡΠΎΡΠ΅ΡΡΠ° Π³ΡΠ°Π½ΡΠ»ΠΈΡΠΎΠ²Π°Π½ΠΈΡ Π°Π·ΠΎΡΠ½ΡΡ
ΡΠ΄ΠΎΠ±ΡΠ΅Π½ΠΈΠΉ ΠΈΠ· ΡΠ°ΡΠΏΠ»Π°Π²Π° Ρ Π΄ΠΎΠ±Π°Π²ΠΊΠ°ΠΌΠΈ ΠΌΠ΅ΡΠΎΠ΄ΠΎΠΌ ΠΏΡΠΈΠ»Π»ΠΈΡΠΎΠ²Π°Π½ΠΈΡ Π½Π° Π²ΡΠ°ΡΠ°ΡΡΠΈΡ
ΡΡ Π²ΠΈΠ±ΡΠ°ΡΠΈΠΎΠ½Π½ΡΡ
Π³ΡΠ°Π½ΡΠ»ΡΡΠΎΡΠ°Ρ
. ΠΡΠ°ΠΊΡΠΈΡΠ΅ΡΠΊΠΈΠΉ ΠΈΠ½ΡΠ΅ΡΠ΅Ρ ΠΏΡΠ΅Π΄ΡΡΠ°Π²Π»ΡΡΡ ΡΠ°Π±ΠΎΡΠΈΠ΅ ΠΎΡΠ³Π°Π½Ρ Π³ΡΠ°Π½ΡΠ»ΡΡΠΎΡΠ°, Π·Π° ΡΡΠ΅Ρ ΠΊΠΎΡΠΎΡΡΡ
ΡΡΠ°Π±ΠΈΠ»ΠΈΠ·ΠΈΡΡΡΡΡΡ Π΄Π²ΠΈΠΆΠ΅Π½ΠΈΠ΅ ΠΏΠ»Π°Π²Π° ΠΈ Π΅Π³ΠΎ Π΄ΠΈΡΠΏΠ΅ΡΠ³Π°ΡΠΈΡ, ΡΠΌΠ΅Π½ΡΡΠ°Π΅ΡΡΡ ΠΏΠ΅Π½ΠΎ- ΠΈ ΠΏΡΠ»Π΅ΠΎΠ±ΡΠ°Π·ΠΎΠ²Π°Π½ΠΈΠ΅ ΠΏΡΠΈ ΠΏΡΠΎΠΈΠ·Π²ΠΎΠ΄ΡΡΠ²Π΅ ΠΏΡΠΎΠ΄ΡΠΊΡΠΈΠΈ.
ΠΡΠΈ ΡΠΈΡΡΠ²Π°Π½Π½Ρ Π΄ΠΎΠΊΡΠΌΠ΅Π½ΡΠ°, Π²ΠΈΠΊΠΎΡΠΈΡΡΠΎΠ²ΡΠΉΡΠ΅ ΠΏΠΎΡΠΈΠ»Π°Π½Π½Ρ http://essuir.sumdu.edu.ua/handle/123456789/27823This publication offers an overview on issues of hardware design and technology of the process of nitric fertilizers granulation from the melt with additives by prilling on rotation vibratory granulators. Practical interest lies in operating elements of the granulator by means of which the motion of the melt and its dispersion is stabilized; foam and dust formation in the process of product is reduced.
ΠΡΠΈ ΡΠΈΡΠΈΡΠΎΠ²Π°Π½ΠΈΠΈ Π΄ΠΎΠΊΡΠΌΠ΅Π½ΡΠ°, ΠΈΡΠΏΠΎΠ»ΡΠ·ΡΠΉΡΠ΅ ΡΡΡΠ»ΠΊΡ http://essuir.sumdu.edu.ua/handle/123456789/2782
Performance and wear mechanisms of novel superhard diamond and boron nitride based tools in machining Al-SiCp metal matrix composite
Metal matrix composites are the desired materials in aerospace and automotive industries since they possess high specific strength. However addition of reinforcement to the matrix material brings the adverse effects of high wear rate of tool materials used in their machining. The current study addresses the issues of wear and performance of superhard tools when high speed machining cast Al-Si alloy reinforced with particulate SiC (20% vol.). A wide range of developed superhard materials was compared to the commercial PCD tools. Nano grain sized wBN-cBN, binderless cBN; B6O-cBN, nano-diamond with WC binder; diamond/MAX-phase; and diamond/SiC tool materials were employed. Use of nano-diamond/WC and diamond/MAX-phase composites resulted in their rapid deterioration due to primarily adhesive pluck-out of diamond and binder phase. Diamond/SiC material exhibited slightly lower performance than the PCD, with the primary wear being the abrasive on the SiC binder phase. Machining with cBN-based tooling at lower speed lead to formation of stable build-up layer, frequently accompanied by severe seizure of tool and workpiece material. However at speed of 400 m/min the absence of such build-up layer caused rapid tool wear. Presence of chemical and diffusional wear mechanisms for diamond tooling has been confirmed through scanning and transmission electron microscopy. Archard-type model of abrasive tool wear was developed for modelling of tool deterioration for all studied tool materials
Influence of High Sintering Pressure on the Microhardness and Wear Resistance of 335 Diamond Powder and Silicon Carbide-Based
The work reported on here involved the development of several samples of "diamond-SiC" composite produced under sintering pressures of up to 9.0 GPa at temperatures of up to 1973 7K. The average size of the diamond micropowder crystals used was 40/28 Β΅m. The sintering process was carried out in a 2500-ton hydraulic press equipped with an anvil-type high-pressure device having a toroidal work surface and a central concavity diameter of 20 mm. The microhardness and wear resistance of the samples were found to be dependent on the sintering pressure. The experimental results indicated that the maximum microhardness and minimum wear resistance coefficients of each compact were attained when the pressure applied during sintering exceeded 6.5 GPa. Based on the established values of pressure, this study served to identify the types of devices applicable for the manufacture of composite material inserts for a variety of rock drilling applications
Influence of high sintering pressure on the microhardness and wear resistance of diamond powder and silicon carbide-based composites
The work reported on here involved the development of several samples of "diamond-SiC" composite produced under sintering pressures of up to 9.0 GPa at temperatures of up to 1973 7K. The average size of the diamond micropowder crystals used was 40/28 Β΅m. The sintering process was carried out in a 2500-ton hydraulic press equipped with an anvil-type high-pressure device having a toroidal work surface and a central concavity diameter of 20 mm. The microhardness and wear resistance of the samples were found to be dependent on the sintering pressure. The experimental results indicated that the maximum microhardness and minimum wear resistance coefficients of each compact were attained when the pressure applied during sintering exceeded 6.5 GPa. Based on the established values of pressure, this study served to identify the types of devices applicable for the manufacture of composite material inserts for a variety of rock drilling applications
Ecological and economic efficiency of the use of granular nitrogen fertilizer with organic impurities
Π ΠΎΠ·Π³Π»ΡΠ½ΡΡΡ ΠΏΠΈΡΠ°Π½Π½Ρ Π²ΠΈΠΊΠΎΡΠΈΡΡΠ°Π½Π½Ρ Π³ΡΠ°Π½ΡΠ»ΡΠΎΠ²Π°Π½ΠΈΡ
Π°Π·ΠΎΡΠ½ΠΈΡ
Π΄ΠΎΠ±ΡΠΈΠ² Π· Π΄ΠΎΠΌΡΡΠΊΠ°ΠΌΠΈ, ΠΊΠΎΡΡΡ ΠΌΡΡΡΡΡΡ Ρ
Π΅Π»Π°ΡΠ½Ρ ΡΠ³ΡΡΠΏΠΎΠ²Π°Π½Π½Ρ. ΠΡΠ°ΠΊΡΠΈΡΠ½Ρ Π·Π°ΡΡΠΊΠ°Π²Π»Π΅Π½ΡΡΡΡ ΡΡΠ°Π½ΠΎΠ²ΠΈΡΡ Π΅ΠΊΠΎΠ»ΠΎΠ³ΠΎ-Π΅ΠΊΠΎΠ½ΠΎΠΌΡΡΠ½Π° Π΅ΡΠ΅ΠΊΡΠΈΠ²Π½ΡΡΡΡ Π²ΠΈΠΊΠΎΡΠΈΡΡΠ°Π½Π½Ρ Π΄Π°Π½ΠΈΡ
Π²ΠΈΠ΄ΡΠ² Π΄ΠΎΠ±ΡΠΈΠ² ΠΏΡΠΈ Π²ΠΈΡΠΎΡΡΠ²Π°Π½Π½Ρ ΡΡΠ»ΡΡΡΠΊΠΎΠ³ΠΎΡΠΏΠΎΠ΄Π°ΡΡΡΠΊΠΈΡ
ΠΊΡΠ»ΡΡΡΡ.
ΠΡΠΈ ΡΠΈΡΡΠ²Π°Π½Π½Ρ Π΄ΠΎΠΊΡΠΌΠ΅Π½ΡΠ°, Π²ΠΈΠΊΠΎΡΠΈΡΡΠΎΠ²ΡΠΉΡΠ΅ ΠΏΠΎΡΠΈΠ»Π°Π½Π½Ρ http://essuir.sumdu.edu.ua/handle/123456789/33708The use of granular nitrogen fertilizer additives containing chelate groups is considered in the article. Ecological and economic efficiency of these types of fertilizers for growing crops arouse practical interest at present.
ΠΡΠΈ ΡΠΈΡΠΈΡΠΎΠ²Π°Π½ΠΈΠΈ Π΄ΠΎΠΊΡΠΌΠ΅Π½ΡΠ°, ΠΈΡΠΏΠΎΠ»ΡΠ·ΡΠΉΡΠ΅ ΡΡΡΠ»ΠΊΡ http://essuir.sumdu.edu.ua/handle/123456789/3370