Spheroidizing annealing: Spheroidizing annealing yog txheej txheem annealing rau spheroidize carbides (cementite Fe3C) hauv hlau. Cov hlau yog rhuab mus rau 20-30 degree saum toj no Ac1, cia sov rau ib lub sij hawm ntawm lub sij hawm, thiab ces maj mam txias mus rau qhov kub thiab txias me ntsis qis dua Ac1, thiab khaws cia rau ib lub sij hawm ntawm lub sij hawm kom tiav lub koom haum transformation, thiab tau txais ib tug spherical los yog granular carbide qauv sib npaug ntawm ferrite matrix.
Lub hom phiaj ntawm spheroidizing annealing yog txo hardness, txhim kho kev ua tau zoo, kom tau cov qauv zoo, thiab npaj cov qauv rau qhov kawg quenching kev kho mob. Cov cua kub kub feem ntau yog 20-30 degree saum Ac1. Qhov zoo ntawm cov qauv tom qab spheroidizing annealing:
⑴ Los ntawm flake mus rau granular pearlite, txo hardness thiab txhim kho kev ua haujlwm.
⑵ Thaum granular pearlite yog rhuab, cov nplej austenite tsis yooj yim rau kev loj hlob, tso cai rau qhov dav dav ntawm qhov kub thiab txias, thiab qhov nyiam ntawm deformation thiab tawg thaum lub sij hawm quenching me me, uas yog, cov txheej txheem quenching yog qhov zoo.
⑶ Cov qauv quenching zoo tshaj plaws tuaj yeem tau txais, uas yog, martensite flakes me me, cov seem ntawm austenite yog me me, thiab qee qhov sib npaug ntawm cov granular carbides tau khaws cia.
Tsis tas li ntawd, steel nrog pom tseeb network carbide qauv yuav tsum ua ntej normalized kom tshem tawm cov carbide network thiab ces spheroidized annealing.
Carbon Steel Mechanical Tubing
