Tempering ib rab riam yog txheej txheem tseem ceeb uas txhim kho nws cov khoom siv kho tshuab, kom ntseeg tau tias nws tuaj yeem ua tau zoo thiab kav ntev.
Cov txheej txheem pib nrog kev xaiv cov hlau tsim nyog rau cov riam putty. Feem ntau, carbon steel yog siv vim nws qhov zoo sib npaug ntawm hardness thiab toughness. Thaum cov khoom siv raw tau txais, nws yog rhuab mus rau qhov kub thiab txias, feem ntau nyob rau hauv thaj tsam ntawm 750 txog 850 degrees Celsius. Qhov cua sov no feem ntau yog ua nyob rau hauv lub qhov cub tswj qhov chaw kom ntseeg tau tias cua sov thoob plaws hauv cov hniav.
Tom qab ncav cuag qhov xav tau qhov kub thiab txias, lub riam putty yog txias txias, txheej txheem hu ua quenching. Qhov no tuaj yeem ua tiav los ntawm kev muab cov hniav kub rau hauv qhov nruab nrab quenching, xws li roj lossis dej. quenching sai txias cov hlau, nce nws hardness. Txawm li cas los xij, qhov no tseem ua rau cov hniav tawg.
Txhawm rau kov yeej lub brittleness thiab ua tiav txoj kev sib xyaw ua ke ntawm hardness thiab toughness, lub cutty riam yog ces tempered. Tempering yuav tsum rov ua kom cov hniav quenched kom qis qis, feem ntau ntawm 150 txog 300 degrees Celsius. Qhov kev rov ua kom sov no tso cai rau cov qauv sab hauv ntawm cov hlau los so thiab rov faib cov kev ntxhov siab los ntawm quenching.
Thaum lub sij hawm tempering, cov hniav yog tuav ntawm qhov kub thiab txias rau ib lub sij hawm, nyob ntawm seb nws thickness thiab cov yam ntxwv kawg xav tau. Qhov no pab txhim kho lub toughness ntawm cov hniav thaum tuav ib tug txaus theem ntawm hardness. Lub sijhawm tempering ntev dua, qhov ntau qhov toughness yog txhim kho, tab sis ntawm tus nqi ntawm qee qhov hardness.
Tom qab tempering, lub riam putty yog txias maj mam, feem ntau nyob rau hauv huab cua. Qhov txias txias no ntxiv stabilizes microstructure ntawm cov hlau. Qhov tshwm sim yog ib rab riam uas muaj qhov sib npaug ntawm qhov tawv thiab tawv, muaj peev xwm ntawm kev sib kis tau zoo thiab khawb putty yam tsis yooj yim deforming lossis tawg. Zuag qhia tag nrho, cov txheej txheem tempering yog qhov sib npaug ntawm qhov kub thiab txias, lub sijhawm, thiab cov cua txias kom tsim tau cov riam zoo tshaj plaws.
Peb Cov Khoom
