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Quenching txias cracking phenomenon ntawm high zaus quenching

Quenching txias cracking phenomenon ntawm high quenching

quenching thiab txias cracking yog hais txog qhov tshwm sim uas cov kab nrib pleb yog tsim nyob rau hauv lub workpiece thaum muaj kev ntxhov siab thaum lub sij hawm quenching thiab txias tshaj qhov tawg lub zog ntawm cov khoom ntawm qhov kub thiab txias. Feem ntau qis dua 200 ° C, vim yog qhov hloov pauv martensitic, qhov kev hloov pauv loj yog tsim, thiab tib lub sijhawm, cov yas ntawm cov hlau tsis zoo ntawm qhov kub thiab txias, thiab cov kab nrib pleb tuaj yeem tshwm sim. Quenching kab nrib pleb tuaj yeem tshwm sim thaum lub caij txias, thaum lub qhov tsuas yog tshem tawm ntawm qhov nruab nrab, lossis thaum nws khaws cia rau qee lub sijhawm.

Lub ntsiab hom ntawm quenching tej kab nrib pleb yog: longitudinal kab nrib pleb tshwm sim los ntawm cov tangential residual kev nyuaj siab yog loj tshaj lub longitudinal kev taw qhia ntawm slender cylindrical qhov chaw tom qab quenching; Qhov kev ntxhov siab ntau dua li qhov sib txawv ntawm qhov sib txawv los ntawm kev ntxhov siab tangential; tubular qhov chaw lossis qhov chaw uas muaj qhov feem ntau tsim cov kab nrib pleb ntawm sab hauv phab ntsa ntawm lub qhov vim qhov sib txawv ntawm qhov cua txias ntawm cov phab ntsa sab hauv ntawm lub qhov thiab lwm qhov chaw.