Dab tsi yog txoj kev kho ntawm precision ntom ntom ntaws steel yeeb nkab?
Jul 18, 2019
Precision seamless steel leeg muaj cov pa roj carbon ntau cov ntsiab lus, yog li lawv muaj qhov zoo heev toughness thiab lub zog, tab sis txhawm rau kom tau txais cov khoom kho dua tshiab zoo dua, nws yog qhov yuav tsum tau npau txog qhov ua tau zoo ntawm cov yeeb yaj kiab steel hlau. Cia wb mus saib ntawm txoj kev no.
Thaum lub precision qhov ntsaws ruaj ruaj ntsaws cov yeeb nkab yog qhov ua kom muaj zog thiab txo, txhua qhov haujlwm ntawm qhov workpiece yuav tsum tau ua kom tawv, yog li cov haujlwm no tau txais los ntawm kev ua haujlwm zoo-quenched martensite. Los ntawm tempering ntawm qhov kub, qhov microstructure tsuas yog muaj li ntawm ib lub cev tsis sib xws tempering tau txais.
Ua haujlwm tsis tu ncua: Kev ua kom tsis tu ncua yog kev kho cua sov uas cov hlau ua kom kub siab tshaj qhov kub tseem ceeb los hloov ua tiav cov hlau ua ib hom austenite thiab tom qab ntawd ua rau huab cua txias. Nws tuaj yeem tshem tawm lub network cementite ntawm hypereutectoid steel. Nws tuaj yeem siv los ua kom zoo zoo siv lead ua lattice ntawm hypoeutectoid steel thiab txhim kho cov cuab yeej zoo sib xws. Nws yog yig los hloov cov huab cua txias nrog hluav taws li qub rau qhov tsawg dua qhov xav tau.
Quenching: quenching yog ua kom sov cov hlau saum qhov kub tseem ceeb, khaws nws rau lub sijhawm, thiab tom qab ntawd muab nws tso rau hauv tus neeg sawv cev quenching, kom nws qhov kub dheev poob qis, thiab nws txias sai sai ntawm qhov siab tshaj qhov tseem ceeb txias npaum li cas, thiab martensite tau tau. Kev kho cua sov rau cov nqaij tsis sib txig. Quenching nce lub zog thiab hardness ntawm hlau, tab sis txo nws cov ductility. Ua rau cov neeg quav dej txias uas nquag siv hauv dej quenching yog: dej, roj, dej alkaline thiab ntsev daws. Tus neeg sawv cev ntawm kev kub ceev steel quenching tuaj yeem yog "cua", yog li cov hlau siab tseem hu ua "cua hlau."
Tempering: Rov ua kom sov cov hlau quenched kom kub thiab txias kom txias rau ib qho kev ntsuas los ntawm kev npau taws. Nws lub hom phiaj yog txhawm rau tshem tawm qhov kev ntxhov siab sab hauv tsim los ntawm kev txo kom tsawg thiab txo qhov hardness thiab brittleness kom ua tiav cov khoom xav tau. Lub siab txias tau muab faib ua peb pawg: qhov kub ntawm qhov cua txias, qhov kub nruab nrab tsis zoo thiab ntsuas qhov ntsuas kub. Cov tempering feem ntau yog siv ua ke nrog quenching thiab normalizing.
Quenching thiab tempering kho: Cov txheej txheem kho kub ntawm kev kub siab tom qab quenching ua quenching thiab tempering kho. Qhov kub siab txias txog qhov ntsuas qhov kub ntawm 500-650 ° C. Quenching thiab tempering tuaj yeem ua rau cov khoom thiab cov khoom ntawm cov hlau tau txais ntau theem ntawm quenching thiab tempering, thiab nws lub zog, plasticity thiab toughness yog qhov zoo, thiab nws muaj cov cuab yeej zoo txhua yam.
Tom qab cov txheej txheem saum toj no, cov cuab yeej ua haujlwm ntawm precision seamless steel hlab tau tseeb txhim kho, daim ntawv thov kev lag luam muaj ntau thiab ntau dua, thiab hauv cov txheej txheem txuas ntxiv, qhov kev lag luam precision seamless steel yeeb tau txais kev lag luam dav dav.
