Sorbitized Precision Steel Tube (5.50) rau Auto Parts. Thawj lub npe yog "lead quenching method". Txij li thaum xyoo 1950, peb lub teb chaws tau ua kom sov cov hlau xaim mus rau qhov ntsuas kub ntawm austenitization thiab muab tso rau hauv cov hmoov lead da dej rau qhov kub thiab txias ze ntawm lub qhov ntswg ntawm isothermal transformation diagram. Lub isothermal kub yog tswj kom txog thaum lub austenitic decomposition tiav, thiab ces lubprecision steel yeeb nkabtshwj xeeb tshaj yog siv rau tsheb qhov chaw thiab txias hauv huab cua kom tau txais tag nrho lossis feem ntau ntawm cov qauv sorbite. Self-heating thiab spontaneous tempering.
Yav dhau los, muaj ib lo lus dav dav ntawm "spontaneous combustion", uas tau nkag siab tias tom qab qhov txias txias ntawm cov yeeb nkab steel yeeb nkab rau lub tsheb, qhov quenched qhov chawprecision seamless yeeb nkabrau lub tsheb qhov chaw tau rhuab thiab tempered vim sab nraud tshav kub conduction nyob rau hauv lub plawv. Txawm li cas los xij, los ntawm kev tshawb fawb tob ntawm cov pa roj carbon tsawg, nws pom tau tias vim nws qhov siab Ms point, tempering cov ntaub ntawv spontaneously nyob rau hauv cov txheej txheem txias.precision steel kav rau nws pib accessories, uas yog hu ua spontaneous tempering. Qhov no yog cov txheej txheem ntawm kev hloov hluav taws xob los ntawm cov tub ntxhais ntawm precision tsheb steel kav mus rau saum npoo thiab tempering los ntawm cua sov. Natural stabilization (los yog natural stabilization kho) (7.8).
Casting muab tso rau hauv cov huab cua qhib rau lub sijhawm ntev yuav ua rau kom muaj kev ntxhov siab rau kev ntxhov siab, yog li stabilizing cov duab thiab qhov loj ntawm cov casting, uas feem ntau hu ua kev laus hauv Suav teb. Txawm hais tias lo lus Askiv "seasoning" tuaj yeem txhais tau tias "kev laus", kev laus tau hais meej meej nyob rau hauv qhov tshwj xeeb ntawm precision steel tube cua sov txheej txheem rau cov qauv hlau thiab nws pib qhov chaw, uas yog, tom qab kev daws teeb meem los yog txias yas deformation, nws cov kev ua tau zoo hloov pauv lub sijhawm thaum muab tso rau hauv chav tsev kub lossis kub dua me ntsis.
Kev hloov pauv ntawm precision steel yeeb nkab cov ntaub ntawv tshwj xeeb tshaj yog siv rau lub tsheb qhov chaw tom qab kev laus yog cov nag lossis daus ntawm cov khoom tsim los ntawm kev sib txawv ntawm cov khoom, tsis suav nrog kev so lossis tshem tawm ntawm kev ntxhov siab sab hauv. Txhawm rau kom tsis txhob muaj kev ntxhov siab, cov khoom molded yuav raug hu ua "natural (los yog natural) stability" es tsis yog "aging." Kev faib tawm ntawm cov ntsiab lus carbon (8.23). Cov ntsiab lus carbon ntawm tshwj xeeb precision steel yeeb nkab rau qhov chaw pib yog hais txog cov ntsiab lus carbon nyob rau hauv tag nrho lossis ib feem ntawm cov hlau, tab sis tsis muaj daim ntawv txwv. Nws cov pa roj carbon concentration yog txwv rau cov khoom siv hauv cov hlau lossis cov ntsiab lus carbon ntawm hlau.
