Yintoni i-induction yokuqinisa unyango lobushushu?

1. Imigaqo esisiseko

Ukukhupha nzima kukusebenzisa umgaqo wokwenziwa kwe-electromagnetic induction ukubeka i-workpiece kwi-coil induction eyenziwe ityhubhu yobhedu. Xa i-alternating current isetyenziswa kwi-coil induction, i-alternating field magnetic kunye ne-frequency yangaphakathi yangaphakathi iya kuveliswa ngaphakathi nangaphandle kwayo. Ukuba i-workpiece ifakwe Kwintsimi yamagnetic, i-current induced ikhiqizwa ngaphakathi kwendawo yokusebenza (i-conductor), kwaye i-workpiece ishushu ngenxa yokuchasana. Ngenxa ye “impembelelo yesikhumba” ye-alternating current, ukuxinana kwangoku kufuphi nomphezulu we-workpiece yeyona nto inkulu, ngelixa i-current in the core of workpiece iphantse i-zero. Ubushushu bomphezulu we-workpiece bunokufikelela kwi-800-1000 degrees Celsius ngaphakathi kwemizuzwana embalwa, ngelixa i-core isondele kwiqondo lokushisa. Xa ubushushu bomphezulu bukhuphuka kwiqondo lokushisa lokucima, ukutshiza ukupholisa ngokukhawuleza ukucima umphezulu we-workpiece.

2. Iimpawu zokufudumala kwe-induction

A. Ngenxa yokuba ukufudumeza kwe-induction kukhawuleza kakhulu kwaye iqondo lokufudumala likhulu, indawo ebalulekileyo yentsimbi iyanda, ngoko ke ubushushu bokucima i-induction (ubushushu bomsebenzi we-workpiece) buphezulu kunobushushu bokucima ngokubanzi.

B. Ngenxa yokufudumeza ngokukhawuleza kwe-induction, i-crystals ye-austenite ayilula ukukhula. Emva kokucima, kufunyenwe isakhiwo se-cryptocrystalline martensite esihle kakhulu, esenza ukuba ubunzima bomphezulu we-workpiece 2-3HRC buphakame kunokucima okuqhelekileyo, kunye nokuxhatshazwa kokugqoka kuphuculwe.

C. Emva kokucinywa komphezulu, umthamo we-martensite kuluhlu oluqinileyo likhulu kunesakhiwo sokuqala, ngoko kukho uxinzelelo olukhulu olushiyekileyo kwi-surface layer, enokuphucula kakhulu ukuxhathisa ukugoba kunye namandla okudinwa kwamacandelo. Amacandelo amancinci amancinci anganyuswa ngamaxesha angama-2-3, iindawo ezinkulu zobukhulu zinokunyuswa ngama-20% -30%.

D. Ngenxa yokuba isantya sokufudumala kwe-induction sikhawuleza kwaye ixesha lifutshane, akukho i-oxidation okanye i-decarburization emva kokucima, kunye nokuguqulwa kwe-workpiece kuncinci kakhulu. Emva kokuqina kwe-induction, ukuze kuncitshiswe uxinzelelo lokucima kunye nokunciphisa i-brittleness, ukushisa okuphantsi kweqondo lokushisa kwi-170-200 degrees Celsius kuyafuneka. Izixhobo zokusebenza ezinkulu zinokuzibamba usebenzisa ubushushu obushiyekileyo besixhobo sokusebenza esicinyiweyo.