Khoom Taw Qhia

FGE38-17 poob ciab peev casting ntawm ductile hlau

Suav ductile hlau txheej txheem

Lub ntiaj teb tsis tshua muaj ntxiv los txhim kho kev ua haujlwm

Nyob rau hauv nam ntawm lub zog siab thiab qis alloy ductile hlau, dhau li ntawm tooj liab thiab molybdenum, nickel thiab niobium kuj tau kawm. Txawm hais tias qhov kev ua tau zoo ntawm nruab nrab manganese ductile hlau tsis ruaj khov txaus, kev tshawb fawb thiab kev tsim cov ntawv thov rau ntau xyoo tau ua tiav cov txiaj ntsig zoo ntawm kev lag luam.

Cov txiaj ntsig ntawm tag nrho cov nyiaj ntawm Si + Al ntawm kev loj hlob tsis tshua muaj lub ntiaj teb magnesium nodular cam khwb cia hlau tau raug kawm ntxiv rau nruab nrab silicon nodular cam khwb cia hlau. Lub neej kev pab cuam ntawm RQTAL5Si5 tshav kub-resistant cam khwb cia hlau tsim nyob rau hauv Tuam Tshoj yog 3 zaug ntawm grey cam khwb cia hlau, 2 zaug ntawm zoo tib yam kub-resistant cam khwb cia hlau, thiab cov kev pab cuam lub neej ntawm Japanese Cr25Ni13Si2 tshav kub-resistant steel yog sib npaug.

High nickel austenitic ductile hlau kuj tau ua tiav, nws tau ua tiav hauv cov roj mining machinery, cov cuab yeej siv tshuaj, cov khoom siv hauv tsev.

Nyob rau hauv cov nqe lus ntawm acid-resistant ductile hlau, lub ntiaj teb tsis tshua muaj siab silicon ductile hlau ua nyob rau hauv Tuam Tshoj yog me me, uniform thiab tuab tshaj li cov zoo tib yam high silicon cam khwb cia hlau, yog li, corrosion kuj yog txhim kho los ntawm 10% mus rau 90%, thiab nws cov neeg kho tshuab. lub zog kuj tseem txhim kho.

Tsis tshua muaj ntiaj teb tuaj yeem spheroidize graphite. Txij li thaum H. Morrogh thawj zaug siv cerium kom tau cov hlau cam khwb cia nodular, ntau tus neeg tau kawm txog tus cwj pwm nodulating ntawm ntau lub ntiaj teb tsis tshua muaj cov ntsiab lus, thiab pom tias cerium yog cov khoom zoo tshaj plaws nodulating, thiab lwm cov ntsiab lus kuj muaj qhov sib txawv ntawm nodulating muaj peev xwm.

China has carried out a lot of research and development on the spheroidization of rare earth elements. It is found that rare earth elements are difficult to obtain spheroidal graphite as complete and uniform as magnesium ductile iron for the commonly used ductile iron components (C3.6 ~ 3.8wt%, Si2.0 ~ 2.5wt%). Moreover, when the amount of rare earth is too high, there will be a variety of deformed graphite, and the white mouth tendency will increase, but if it is a high carbon hypereutectic composition (C>4.

Vim qhov tsis zoo hlau tsis zoo, cov ntsiab lus ntawm cov sulfur siab (cupola smelting) thiab qis hlau rho tawm kub hauv Suav teb, qhov sib ntxiv ntawm cov av tsis tshua muaj tsim nyog. Magnesium yog lub ntsiab tseem ceeb hauv tus neeg sawv cev nodulating, thiab lub ntiaj teb tsis tshua muaj peev xwm txhawb nqa qhov nodulating ntawm graphite ntawm ib sab; Ntawm qhov tod tes, nws tseem yuav tsum tau kov yeej lub zog ntawm leej faj thiab impurity ntsiab kom paub meej spheroidization.

Tsis tshua muaj ntiaj teb tiv thaiv kev cuam tshuam cov ntsiab lus los ntawm kev rhuav tshem spheroidization. Cov kev tshawb fawb qhia tau hais tias thaum tag nrho cov khoom cuam tshuam xws li Pb, Bi, Sb, Te thiab Ti yog {{0}}}05wt%, ntxiv 0.{{ 8}}1wt% (cov nyiaj seem seem) ntawm lub ntiaj teb tsis tshua muaj peev xwm ua kom muaj kev cuam tshuam tag nrho thiab inhibit qhov tsim ntawm deformed graphite. Feem ntau ntawm Tuam Tshoj tus npua hlau muaj titanium, thiab qee cov npua hlau muaj titanium siab li {{10}}.2 ~ 0.3wt%, tab sis tsis tshua muaj lub ntiaj teb magnesium nodule tus neeg sawv cev tuaj yeem ua rau cov nyiaj seem. ntawm lub ntiaj teb tsis tshua muaj hlau mus txog 0.02 ~ 0.03wt%, yog li nws tseem tuaj yeem xyuas kom meej tias cov graphite nodule zoo. Yog tias 0.02 ~ 0.03wt% Bi ntxiv rau cov hlau nplaum, cov graphite kheej kheej yuav luag tag nrho. Yog tias 0.01 ~ 0.05wt% Ce tom qab ntxiv, qhov qub spheroidization lub xeev rov qab los, uas yog vim Bi thiab Ce tsim cov tebchaw ruaj khov.

Nucleation ntawm tsawg ntiaj teb. Cov kev tshawb fawb txij li xyoo 1960s tau pom tias cov inoculants uas muaj cerium tuaj yeem nce cov pellets hauv cov kua hlau thoob plaws lub sijhawm khaws cia, ua rau ntau cov graphite pellets nyob rau hauv cov ntaub so ntswg zaum kawg thiab me me dawb nyiam. Cov txiaj ntsig tseem qhia tau tias cov inoculant uas tsis tshua muaj lub ntiaj teb tuaj yeem txhim kho cov nyhuv inoculant ntawm nodular cam khwb cia hlau thiab ua kom muaj peev xwm tiv thaiv kev lwj. Yog vim li cas vim li cas tus naj npawb ntawm graphite spheres nce nrog qhov sib ntxiv ntawm lub ntiaj teb tsis tshua muaj peev xwm raug ntaus nqi rau: lub ntiaj teb tsis tshua muaj peev xwm muab cov nucleus ntau dua, tab sis cov nucleus muaj pes tsawg leeg txawv ntawm qhov muab los ntawm FeSi inoculation; Lub ntiaj teb tsis tshua muaj peev xwm ua rau cov nuclei yav dhau los tsis ua haujlwm (tam sim no hauv cov kua hlau) loj hlob, ua rau muaj kev nce ntxiv ntawm tag nrho cov nuclei hauv cov kua hlau.

Cov teeb meem xav tau kev saib xyuas

(a) Cov kev cai nruj rau cov tshuaj muaj pes tsawg leeg, cov pa roj carbon silicon cov ntsiab lus ntawm cov kua hlau qub yog siab dua li cov hlau cam khwb cia hlau, thiab cov ntsiab lus ntawm manganese, phosphorus thiab sulfur hauv cov hlau cam khwb cia yog txo.

(2) Qhov kub ntawm cov kua hlau yog siab dua li ntawm grey cam khwb cia hlau los them rau qhov poob ntawm cov kua hlau kub thaum lub sij hawm spheroidization thiab inoculation.

(3) spheroidizing kev kho mob, uas yog, ntxiv tus neeg sawv cev spheroidizing rau cov kua hlau.

(4) Ntxiv inoculant rau kev kho mob inoculation.

(5) Cov dej ntws ntawm cov hlau tsis zoo, qhov shrinkage loj, yog li qhov xav tau ntawm qhov kub thiab txias ntau dua thiab qhov loj ntawm lub qhov dej loj, tsim nyog thov ntawm riser, txias hlau, siv cov txheej txheem ua ntu zus.

(6) Kev kho cua sov.

① Kev tsim kho. Cov ferritic matrix tau txais, plasticity thiab toughness yog txhim kho, qhov kev ntxhov siab raug tshem tawm thiab kev ua haujlwm txiav tau zoo tuaj.

② Normalizing. Lub pearlite matrix tau txais los txhim kho lub zog thiab hnav tsis kam.

③ Tempering. Cov qauv matrix ntawm tempered sorbite thiab zoo txhua yam khoom siv, xws li lub ntsiab ncej, crankshaft, txuas pas nrig, thiab lwm yam, tau txais.

④ isothermal quenching. Ua kom cov khoom uas muaj cov duab zoo thiab cov kev ua tau zoo tshaj plaws kom tau txais cov qauv matrix ntawm qis bainite, nrog rau cov khoom siv kho tshuab muaj zog, siab hardness, siab toughness, thiab lwm yam, kom tsis txhob tawg thaum lub sij hawm kho cua sov, xws li spindle, crankshaft, iav thiab lwm yam.

Zhongwei Precision muaj cov kev pabcuam hauv qab no

Detection Systems

Copper Silica Sol Investment Casting

Peb yog cov chaw tsim khoom ntawm "FGE38-17 Ductile hlau castings", yog tias koj xav tau cov ntaub ntawv ntxiv thov hu rau peb!