Yuav Ua Li Cas Hlau Castings Ua
Tshaj tawm los ntawmAdmin
Kab lus no tham txog cov khoom thiab cov ntsiab lus alloying ntawm cov hlau thiab lawv siv li cas hauv kev ua cov hlau castings.Peb kuj tseem yuav kov cov nqi cuam tshuam nrog steel castings.Nyeem ntxiv kom paub ntxiv!Cov npe hauv qab no yog cov kauj ruam sib txawv koom nrog hauv kev tsim cov hlau castings.Thaum koj ua tiav, koj tuaj yeem tawm mus yuav koj cov hlau casting.Cov npe hauv qab no yog qee cov kauj ruam tseem ceeb tshaj plaws hauv kev tsim cov hlau casting.Alloying cov ntsiab lus hauv steelHlau yog tsim los ntawm ntau yam alloying ntsiab uas txhim kho nws cov khoom siv kho tshuab.Nyob rau hauv lub austenite theem, lawv yuav luag uniformly faib.Thaum lub austenite yog rhuab mus rau thaj tsam austenitic, nws zoo li decompose rau hauv kev sib xyaw ntawm ferrite thiab carbide.Cov txheej txheem carbide nyiam mus rau theem cementite.Lwm cov ntsiab lus uas ua rau cov hlau yog rov faib dua ntawm cov ferrite thiab cementite theem los ntawm kev sib kis.Lawv kuj ua rau austenite hloov mus rau hauv pearlite nyuaj thiab ncua sij hawm tsim nyog kom ua tiav.Txheej txheem ntawm kev ua steel castingsCov txheej txheem ntawm kev ua cov hlau castings yuav tsum nchuav cov hlau ua kua rau hauv pwm thiab cia nws khov.Thaum kawg ntawm cov txheej txheem, lub tundish yuav luag tas thiab strand tau solidified.Tom qab ntawd, cov rolls uas tau tsav tau txav cov saw hlau pib mus rau hauv qhov chaw txias txias.Thaum lub sij hawm cov kauj ruam no, lub oob khab oob khab yog disconnected los ntawm strand thiab txias.Lub laub-tawm yob yog tom qab ntawd txav mus rau hauv cov pwm thiab cov saw hlau pib rub tawm.Cov khoom siv hlauTensile zog ntawm steel castings yog ib qho kev ntsuas ntawm cov hlau lub peev xwm los dais loads nyob rau hauv qeeb loading tej yam kev mob.Cov khoom no yog ntsuas los ntawm kev muab tus neeg sawv cev cam khwb cia rau kev tswj tensile loading, uas yog rub lub zog ntawm lub tensile bar kom txog thaum qhov tsis ua tiav.Qhov chaw ntawm qhov me me hla ntu tom qab tsis ua haujlwm yog qhov ntsuas ntawm cov hlau casting lub zog tensile.Ntxiv rau qhov no, steel castings qhia tib qib ntawm toughness li lawv cov hlau counterparts.Tus nqi ntawm cov hlau castingsHlau castings yog tsim los siv ntau yam txheej txheem, thiab ntau ntawm lawv yuav raug kuaj xyuas.Ib tug neeg sawv cev cam khwb cia qauv yog raug rau ib tug tswj tensile loading.Qhov no suav nrog kev siv lub zog rub mus rau ib qho kawg ntawm lub tensile bar kom txog thaum nws ua tsis tiav.Qhov tshwm sim khoov bar yog tshuaj xyuas rau txhua qhov tsis pom zoo tawg.Lwm hom kev tshuaj xyuas yog qhov kev ntsuam xyuas qhov cuam tshuam, uas suav nrog ntsuas tus nqi ntawm lub zog yuav tsum tau ua txhaum tus qauv ntsuas tus qauv.Qhov siab dua lub zog, lub zog ntawm cov khoom cam khwb cia.Distortion ntawm steel castingsIb qho tseem ceeb ntawm qhov zoo ntawm cov hlau castings yog lawv lub peev xwm los tiv thaiv distortion thaum lub sij hawm kho cua sov txheej txheem.Cov txheej txheem no hu ua annealing.Qhov kub ntawm qhov yuav tsum tau ua rau annealing steel castings yog nruab nrab ntawm 300 ℃ txog 700 ℃.Qhov kev ntsuas kub no yog xav tau rau cov castings loj dua nrog cov khoom muaj kev ntxhov siab tseem ceeb.Cov txheej txheem kev kho cua sov feem ntau yog ua los ntawm pre-heating rau lawv thiab txias lawv maj mam thaum annealing tiav.
