Coefficient ntawm expansionprecision steel yeeb nkab

Txheeb xyuas cov txheej txheem tuaj yeem siv rau hauv lub qhov cub annealing soapy dej los so txhua qhov sib koom ua ke, saib seb puas yuav khiav roj;qhov chaw uas cov pa roj yog feem ntau yuav khiav mus rau hauv lub annealing furnace tube thiab muab lub raj tso rau hauv qhov chaw, qhov chaw no seals tshwj xeeb tshaj yog yooj yim rau hnav thiab tsim kua muag, Nco ntsoov xyuas feem ntau hloov.Qhia ua ntej yob txoj kev ntawm precision steel pretreatment txheej txheem txheej txheem;tsom xam ntawm normalizing kub, tuav lub sij hawm thiab txias zog ntawm raw khoom raj microstructure thiab txhua yam khoom;Kev txiav txim siab cov txheej txheem normalizing precision steel hlab: cua sov kub (890 ± 10) ℃, cua txias tom qab tuav 6min interspersed.Cov txheej txheem kev ua haujlwm zoo tuaj yeem raug tshem tawm tag nrho precision steel Widmanstaten kom phim lub zog tawm los thiab lub zog tensile yog qhov tsim nyog cov txiaj ntsig ntau dua σS / bσ≤0.78, elongation 5δ≥30%, thiab txhim kho txias formability kom tsis txhob txias-tsim tawg.Expansion coefficient tuaj yeem qhia los ntawm ntim lossis ntev feem ntau qhia txog qhov ntev.

Qhov ceev yog qhov hnyav ntawm cov khoom hauv ib chav tsev ntim ntawm cov khoom, chav tsev yog kg / m3 lossis 1b / in3.Tensile residual stress feem ntau yog los ntawm tensile residual stress generated nyob rau hauv lub cuab yeej thaum lub vuam txheej txheem.Tam sim no, dav siv nyob rau hauv engineering annealing kev kho mob kom tshem tawm cov residual kev nyuaj siab tom qab vuam txias, thiab txias tom qab vuam residual kev nyuaj siab yog ib qho tseem ceeb txheej txheem, qhov no txoj kev yog ib tug pov tseg ntawm lub zog thiab yooj yim kom muaj ib tug ntau dua welding residual kev nyuaj siab.Kev kho cua sov tom qab vuam yog ib qho cuab yeej tshiab los tshem tawm cov kev ntxhov siab seem.Ua ntej vuam precision steel yeeb nkab yog preheated rau qhov kub ntawm kev kho cua sov thiab vuam txheej txheem vuam txuas ntxiv cua sov kom tswj tau qhov kub thiab txias, kev siv vuam ua tiav cov paj rwb rwb thaiv tsev rwb thaiv tsev tau tso cai kom txias maj mam.quenching cov yeeb nkab steel kom muaj zog thiab hardness, tab sis kom txo lawv cov plasticity.Quench hardening tus neeg sawv cev feem ntau siv hauv dej, roj, ntsev thiab alkali tov thiab lwm yam.Yuav muaj tempered precision steel hardened precision steel rov ua kom sov rau qee qhov kub, thiab tom qab ntawd qee txoj kev txias hu ua tempering.Nws lub hom phiaj yog txhawm rau tshem tawm cov kev ntxhov siab sab hauv uas tsim los ntawm quenching kom txo cov hardness thiab brittleness, thiaj li yuav tau txais cov khoom uas xav tau.Tempering ntsiab lus high-temperature tempering, tempering thiab tsawg kub tempering peb pawg.Multi-quenching thiab tempering, normalizing siv ua ke.Tom qab quenching thiab tempering quenching txoj kev hu ua quenching.