Chii chinonzi induction kuomesa kupisa kurapwa?

1. Mitemo inokosha

Induction kuoma ndeye kushandisa musimboti we electromagnetic induction kuisa iyo workpiece mune induction coil yakagadzirwa nemhangura chubhu. Kana kuchinjika ikozvino kuchiiswa kune induction coil, inochinjisa magineti ine yakafanana yemukati ikozvino frequency inogadzirwa mukati nekuitenderedza. Kana iyo workpiece yakaiswa Mune magnetic field, induced current inogadzirwa mukati me workpiece (conductor), uye workpiece inopisa nekuda kwekupikisa. Nekuda kwe “skin effect” yealternating current, iyo density iripo padhuze nepamusoro peiyo workpiece ndiyo yakakura, nepo iripo mukatikati meiyo workpiece inenge zero. Kupisa kwepamusoro kweiyo workpiece kunogona kusvika 800-1000 madhigirii Celsius mukati memasekondi mashoma, nepo musimboti uchiri padyo nekamuri tembiricha. Kana tembiricha yepasi ichikwira kusvika painodzima tembiricha, pfapfaidza kutonhora nekukasira kudzima pamusoro peiyo workpiece.

2. Zvimiro zvekupisa induction

A. Nemhaka yokuti induction heat inokurumidza kukurumidza uye dhigirii yekupisa yakakura, nzvimbo inokosha yesimbi inowedzerwa, saka tembiricha yekudzima tembiricha (workpiece surface tembiricha) yakakwirira kudarika tembiricha yekudzima.

B. Nekuda kwekukurumidza kudziya kupisa, iyo austenite crystals haisi nyore kukura. Mushure mekudzima, yakanakisa yakanakisa cryptocrystalline martensite chimiro chinowanikwa, chinoita kuti kuomarara kwepamusoro kweiyo workpiece 2-3HRC yakakwirira kupfuura iyo yekudzima kwakajairwa, uye kuramba kwekupfeka kunovandudzwa zvakare.

C. Mushure mekudzima kwepamusoro, kuwanda kwemartensite mumucheka wakaoma wakakura kudarika chimiro chepakutanga, saka kune hukuru hwakasara hwekushungurudzika muhupamhi hwepamusoro, iyo inogona kuvandudza zvakanyanya kupikisa kwekukotama uye kuneta kwesimba rezvikamu. Zvikamu zviduku zvinogona kuwedzerwa ne 2-3 nguva, zvikamu zvakakura zvinogona kuwedzerwa ne 20% -30%.

D. Nokuti induction heat speed inokurumidza uye nguva ipfupi, hapana oxidation kana decarburization mushure mekudzima, uye deformation ye workpiece zvakare iduku zvikuru. Mushure mekuomesa induction, kuti uderedze kudzima kushushikana uye kuderedza brittleness, yakaderera tembiricha tembiricha pa170-200 madhigirii Celsius anodiwa. Mahombe workpieces anogona zvakare kuzvidzora achishandisa kupisa kwasara kweiyo yakadzimwa workpiece.