Qhov Tseem Ceeb Qhov Sib Txawv - Annealing vs Normalizing
Txawm hais tias Annealing thiab normalizing yog ob txoj kev kho cua sov uas feem ntau siv hauv metallurgy uas siv kev sib xyaw ua ke ntawm cua sov thiab cua txias, qhov sib txawv ntawm qhov tuaj yeem pom ntawm ob txheej txheem, hauv cov kauj ruam kawg txias. Ob txoj kev ua raws li cov txheej txheem zoo sib xws thaum pib ntawm cov txheej txheem, tab sis muaj qhov sib txawv tseem ceeb hauv cov kauj ruam kawg txias. Qhov sib txawv tseem ceeb ntawm annealing thiab normalizing yog tias, nyob rau hauv annealing, cov txheej txheem txias yog ua nyob rau hauv qhov cub thaum, nyob rau hauv normalizing, nws yog ua nyob rau hauv cov huab cua. Txawm li cas los xij, ob txoj hauv kev tseem ceeb sib npaug, thiab lawv hloov kho microstructure ntawm cov khoom sib txawv.
Yuav ua li cas?
txheej txheem Annealing muaj peb kauj ruam; Ua kom sov cov khoom rau qhov kub siab (ze los yog siab dua qhov kub thiab txias), tsau cov khoom ntawm qhov kub thiab txias kom txog thaum cov khoom xav tau tiav, thiab txias cov khoom cua sov ntawm tus nqi qeeb mus rau chav tsev kub hauv qhov cub.
Annealing hloov cov khoom xws li machinability, mechanical lossis hluav taws xob khoom, lossis qhov seem stability. Cov txheej txheem no softens cov khoom. Piv txwv ntawm cov khoom siv annealing suav nrog; tooj liab, stainless hlau thiab tooj dag. Muaj ob peb variations nyob rau hauv tus txheej txheem nyob ntawm seb cov khoom ntawm cov khoom resultant. Lawv yog tag nrho annealing (pa annealing), isothermal annealing, spheroids annealing, recrystallization annealing, thiab kev nyuaj siab annealing.
Dab tsi yog qhov normalizing?
Cov txheej txheem kev kho cua sov normalizing yog ua los ntawm cua sov cov khoom mus rau qhov kub siab tshaj nws qhov kub thiab txias, thiab tom qab ntawd cov khoom yog tsau rau ntawm qhov kub thiab txias kom txog thaum hloov pauv. Thaum kawg, cov khoom siv rhuab yog tshem tawm ntawm qhov cub thiab txias mus rau chav sov sab nraum qhov cub. Qhov kev kho no txhim kho cov nplej loj thiab txhim kho qhov sib xws ntawm microstructure.
Kev tsim cov forgings loj xws li kev tsheb ciav hlau log thiab axles yog thaj chaw koom nrog hauv kev ua haujlwm zoo. Cov ntaub ntawv zoo li qub yog softer, tab sis tsis tsim cov khoom sib xws ntawm cov ntaub ntawv annealed.
Qhov txawv ntawm Annealing thiab Normalizing yog dab tsi?
yam ntxwv ntawm Annealing thiab Normalizing
txheej txheem
Thawj theem ntawm ob txheej txheem zoo ib yam, tab sis qhov kawg yog qhov sib txawv. Hauv annealing, cov txheej txheem txias yog ua tiav hauv qhov cub. Tab sis, nyob rau hauv normalizing nws yog txias nyob rau hauv cov huab cua.
Annealing:
Normalizing:
(kub tseem ceeb: qhov kub ntawm qhov hloov pauv crystalline tshwm sim)
Cov khoom siv tom qab kev kho mob
| Cov khoom siv ntxiv | Normalized material |
| Tus nqi qis rau hardness, tensile zog, thiab toughness | Tus nqi me ntsis rau hardness, tensile zog, thiab toughness |
| Ntau qhov loj me faib tau ntau dua | Ntaus loj faib yog me ntsis tsis sib xws |
| Kev ntxhov siab sab hauv tsawg kawg | Kev ntxhov siab hauv sab hauv yog me ntsis ntxiv |
|
Pearlite yog ntxhib Nws feem ntau daws tau los ntawm lub tshuab tsom iav kho qhov muag |
Pearlite zoo Nws feem ntau tshwm tsis tau daws nrog kho qhov muag tsom iav |
Purpose
| Normalizing | |
| Txhim kho cov qauv crystalline thiab tshem tawm cov kev ntxhov siab ntxiv kom nws cov ductility los ntawm kev txo cov tawv thiab brittleness | Kom tau txais cov txheej txheem ua kom zoo ua ntej ua kom tawv. Kom txo qis kev sib cais hauv kev sib tsoo ntawm forgings. Txhim kho cov hlau me ntsis. |
Tus nqi
Annealing: Annealing yog kim dua li nws siv qhov cub.
Normalizing: Normalizing yog tsawg kim tshaj annealing.
Image Courtesy: "Loading anti-aircraft case rau hauv lub qhov cub kub nyhiab kom ua rau lawv mos, zoo ib yam, thiab ductite-npaj rau… - NARA - 196209" los ntawm Unknown los yog tsis muab - US National Archives and Records Administration. (Public Domain) ntawm Wikimedia Commons
