Siv nruab nrab zaus induction cua sov yeeb nkab dabtsi yog khoov tshuab

Hauv cov khoom siv hlau tiag tiag, cov ciam teb lossis thaj chaw intragranular muaj ntau qhov zoo, refractory precipitates ntawm austenite theem. Thaum cov ciam teb nplej ntsib cov nag lossis daus thaum lawv tsiv teb tsaws, lawv khoov, ua rau thaj tsam ntawm thaj tsam thiab lub zog, yog li cuam tshuam cov qoob loo ciam teb thiab ua raws li cov qoob loo ciam teb pinning cov neeg sawv cev. Yog li ntawd, lub xub ntiag ntawm austenite theem hais yog ib tug tsis kam mus rau grain ciam teb txav. Thaum lub ntim feem pua ​​ntawm cov precipitates yog tas li, qhov finer hais thiab ntau dua lawv dispersion, qhov ntau dua qhov kev tiv thaiv rau grain ciam txav.

Nyob rau hauv lub xub ntiag ntawm austenite theem hais, txoj kev loj hlob austenite yog hindered los ntawm cov dispersed precipitates. Raws li austenite grain loj hlob ntxiv, tag nrho cov qoob loo ciam teb maj mam txo qis, thiab cov qoob loo loj hlob maj mam txo qis. Thaum cov qoob loo loj hlob tsav quab yuam thiab qhov tsis kam ntawm cov dej ntws tawm mus txog qhov sib npaug, austenite grain loj hlob tsis tu ncua.

(Qhov no yog los ntawm phau ntawv qhia kev cob qhia rau cov kws kho cua sov.) Hauv cov ntsiab lus, austenite grain loj hlob nyob rau hauv nruab nrab - zaus induction cua sov yeeb nkab dabtsi yog khoov tshuab yog cov txheej txheem spontaneous, feem ntau manifested li grain ciam pauv. Highly dispersed refractory theem particle ho inhibit grain loj hlob. Yuav kom tau txais cov nplej zoo austenite, nws yog ib qho tseem ceeb kom ntseeg tau tias cov hlau muaj tus lej txaus thiab qhov zoo ntawm cov theem refractory.