Hauv kev txhaj tshuaj molding cov cuab yeej, kev xaiv ntawm lub thoob thiab cov ntaub ntawv ntsia hlau ncaj qha txiav txim siab lawv cov hnav tsis kam, corrosion kuj, kub tsis kam, thiab kev pab lub neej, tsim ib qho tseem ceeb ntawm cov khoom siv thiab cov khoom zoo. Tau ntsib nrog ntau yam khoom siv raw khoom thiab cov txheej txheem ua haujlwm nyuaj, kev xaiv cov khoom siv suab zoo yuav tsum sib npaug ntawm lub zog, hardness, processability, thiab kev lag luam kom tau raws li qhov xav tau ntawm kev ua tau zoo, ruaj khov, thiab ntev - voj voog ntau lawm.
Lub thoob lub hauv paus feem ntau yog ua los ntawm siab - lub zog hlau alloy structural steel, xws li siab - zoo carbon steel los yog chromium- molybdenum alloy steel. These materials, through forging or centrifugal casting, can achieve high density and a uniform microstructure, possessing good rigidity to withstand internal high pressure and thermal stress. Txawm li cas los xij, kev cia siab rau lub hauv paus hlau tsuas yog tsis txaus los tiv thaiv lub sijhawm ntev - cov teebmeem ntawm cov khoom siv abrasive heev lossis cov khoom muaj corrosive heev; Yog li ntawd, cov txheej txheem sib xyaw ua ke feem ntau yog siv rau sab hauv phab ntsa. Bimetallic composite technology siv centrifugal casting ntawm siab -chromium cam khwb cia hlau los yog npib tsib xee-raws li alloys mus rau hauv lub puab phab ntsa ntawm lub chim los ua ib tug metallurgically bonded hnav- resistant txheej, ho txhim kho khawb thiab corrosion kuj. Surface coating technologies such as thermal spraying or physical vapor deposition (PVD) can generate a dense and strongly adherent ceramic or metal compound layer on the inner wall, combining high hardness with a low coefficient of friction, suitable for high-speed, high-filling conditions.
Cov khoom siv ntsia hlau kuj yog raws li cov hlau alloy, feem ntau siv nitriding -cov hlau tshwj xeeb xws li 38CrMoAlA thiab SACM645. Cov ntaub ntawv no, tom qab tempering thiab sib sib zog nqus nitriding kev kho mob, tuaj yeem ua tiav qhov tawv tawv ntawm HV800 lossis siab dua, thaum tuav zoo toughness hauv cov tub ntxhais, muaj peev xwm tiv taus lub zog loj thiab cuam tshuam. Rau kev ua cov ntaub ntawv uas muaj cov iav fibers, cov ntxhia pob zeb, los yog cov khoom abrasive heev, bimetallic sintering los yog laser cladding txheej txheem yuav siv tau nyob rau hauv cov yooj yim hnav seem ntawm cov ntsia hlau kom khov kho cov alloys nyuaj (xws li tungsten carbide) rau lub substrate nto, tsim localized siab - hnav - kev pab cuam lub neej. Rau siab - kub los yog ib puag ncig corrosive heev, tshwj xeeb alloys uas muaj cov ntsiab lus xws li npib tsib xee, molybdenum, thiab vanadium tuaj yeem raug xaiv los txhim kho kev tiv thaiv oxidation thiab tshuaj corrosion.
Kev xaiv cov khoom siv kuj tseem xav txog kev siv tshuab thiab kev lag luam. Txawm hais tias bimetallic chim thiab screws muaj kev nqis peev ntau dua, lawv tuaj yeem txo qhov hloov zaus thiab poob qis hauv qhov ntev - voj voog, hnyav - daim ntawv thov; cov khoom siv nitrided zoo tib yam muab cov nqi zoo- ua tau zoo raws li kev ua haujlwm dav dav. Tsis tas li ntawd, cov thermal expansion coefficients ntawm cov khoom sib txawv thiab lub thoob - ntsia hlau haum clearance tsim yuav tsum tau sib koom ua ke kom tsis txhob muaj jamming los yog hnav ntau dhau vim thermal mismatch.
Feem ntau, lub thoob thiab cov ntsia hlau xaiv cov khoom siv yog ib qho kev tsim vaj tsev ua ke nrog cov ntaub ntawv science, mechanics, thiab cov txheej txheem engineering, xav tau kev ntsuam xyuas zoo raws li cov khoom siv, kev ua haujlwm tsis zoo, thiab cov hom phiaj tsim khoom. Lub tswv yim xaiv cov khoom siv suab zoo tsis tsuas yog txhim kho cov cuab yeej siv tau ntev thiab ruaj khov tab sis kuj tseem muab kev lees paub ruaj khov rau kev ua tau zoo thiab siab - zoo txhaj tshuaj molding ntau lawm.
