Kev tsom xam lub thoob cov hniav ua hauj lwm lub ntsej muag thiab cov khoom excavated tiv tauj, nyob rau hauv ib tug ua tiav excavation txheej txheem nyob rau hauv txawv kev ua hauj lwm theem ntawm nws txawv kev nyuaj siab tej yam kev mob.Thaum tus hniav ntaj thawj kov cov khoom nto, lub thoob hniav hau yog muaj zog heev vim nws ceev ceev. Yog hais tias lub zog ntawm lub thoob cov hniav tsis tshua muaj, cov yas deformation yuav tshwm sim ntawm lub taub hau.Nrog qhov nce ntawm khawb qhov tob, qhov kev ntxhov siab ntawm cov hniav yuav hloov.Thaum lub thoob cov hniav txiav cov khoom, cov thoob hniav thiab cov khoom tshwm sim txheeb ze, ua rau lub zog loj heev extrusion siab rau ntawm qhov chaw, yog li ua kom muaj kev sib txhuam loj ntawm lub thoob cov hniav ua haujlwm lub ntsej muag thiab cov khoom siv.Yog cov khoom siv yog cov pob zeb tawv, pob zeb, thiab lwm yam, kev sib txhuam yuav loj heev.Qhov tshwm sim ntawm qhov rov ua dua. Qhov kev txiav txim ntawm cov txheej txheem no ua rau cov qib sib txawv ntawm qhov chaw hnav ntawm lub thoob cov hniav ua haujlwm lub ntsej muag, thiab tom qab ntawd ua rau cov furrow nrog qhov tob dua.Bucket hniav muaj pes tsawg leeg zoo cuam tshuam rauntev ntawm kev pab cuam lub neej ntawm lub thoob cov hniav, xaiv thoob cov hniav ntawm chav kawm ntau ceev faj daddus muag thoob cov hniav Kuv kuj siv nws cov thoob cov hniav, cov nyhuv yog zoo! Qhov zoo siab ntawm lub hauv ntej ua hauj lwm lub ntsej muag yog obviously ntau dua li nyob rau tom qab ua hauj lwm lub ntsej muag. , thiab lub ntsej muag ua haujlwm pem hauv ntej yog hnav tsis zoo.Nws tuaj yeem txiav txim siab tias qhov zoo siab thiab kev sib txhuam quab yuam yog qhov tseem ceeb ntawm cov khoom siv sab nraud rau qhov tsis ua haujlwm ntawm cov hniav, uas ua lub luag haujlwm tseem ceeb hauv cov txheej txheem tsis ua haujlwm.
Cov txheej txheem tsom xam: nqa ob qho qauv ntawm lub ntsej muag ua haujlwm pem hauv ntej thiab nraub qaum, thiab zom lawv tiaj tus rau kev sim hardness.Nws pom tias qhov tawv ntawm tib tus qauv sib txawv heev, thiab qhov kev txiav txim ua ntej yog tias cov khoom tsis sib xws. cov qauv tau hauv av, polished thiab corroded, thiab nws tau pom tias muaj cov ciam teb pom tseeb ntawm txhua tus qauv, tab sis cov ciam teb sib txawv.Los ntawm macro taw tes ntawm view, qhov chaw ib puag ncig yog lub teeb grey thiab qhov nruab nrab yog tsaus, qhia tau hais tias lub tej zaum yog ib qho inlaid casting.Nyob rau saum npoo, qhov uas nyob ib sab yuav tsum yog ib qho inlaid block.Qhov kev ntsuam xyuas hardness ntawm ob sab ntawm tus ciam teb tau ua tiav ntawm teev-150 digital zaub rockwell hardness tester thiab mhv-2000 digital display microhardness tester, thiab qhov sib txawv tseem ceeb tau pom. Qhov uas nyob ib puag ncig yog ib qho ntxig thaiv thiab ib puag ncig yog ib qho matrix.Qhov kev sib xyaw ntawm ob yog zoo ib yam.Lub ntsiab alloy muaj pes tsawg leeg (feem ntau, %) yog 0.38c, 0.91cr, 0.83mn thiab 0.92si.Lub zog ntawm cov khoom hlau nyob ntawm lawv cov muaj pes tsawg leeg thiab kev kho cua sov txheej txheem.Qhov sib xws thiab qhov sib txawv ntawm hardness qhia tias lub thoob cov hniav tau muab tso rau hauv kev siv yam tsis muaj kev kho cua sov tom qab casting. Cov ntaub so ntswg tom qab kev soj ntsuam paub meej tias qhov no.
Lub koom haum tsom xam ntawm metallographic soj ntsuam pom tau hais tias lub substrate yog feem ntau yog dub zoo lamellar qauv, teem daim ntaub so ntswg muaj ob qhov chaw, fritter dawb thaiv thiab dub, thiab dawb thaiv kom deb ntawm tus ntoo khaub lig seem cheeb tsam koom haum (thiab ntxiv microhardness test proves tias lub lub koom haum rau cov ferrite dawb thaj ua rau thaj, dub zoo lamellar qauv ntawm troostite los yog troostite thiab pearlite hybrid lub koom haum.Qhov tsim ntawm bulk ferrite nyob rau hauv lub insert yog zoo ib yam li ntawm ib co theem hloov chaw nyob rau hauv lub tshav kub cuam tshuam cheeb tsam ntawm vuam.Raws li qhov kev txiav txim ntawm hlau ua kua kub thaum lub sij hawm casting, cheeb tsam no yog nyob rau hauv austenite thiab ferrite ob-theem cheeb tsam, qhov twg cov ferrite yog tag nrho loj hlob thiab nws cov microstructure yog khaws cia nyob rau hauv chav tsev kub.Vim hais tias lub thoob hniav phab ntsa yog kuj nyias thiab cov insert thaiv ntim yog loj, lub qhov nruab nrab ntawm qhov ntxig thaiv qhov kub yog qhov tsawg, tsis muaj ferrite loj tsim
Kev kuaj hnav ntawm mld-10 coj lub tshuab kuaj pom pom tias hnav tsis kam ntawm matrix thiab ntxig yog zoo dua li ntawm quenched 45 steel nyob rau hauv cov xwm txheej ntawm kev cuam tshuam me me rau kev kuaj.Meanwhile, hnav tsis kam ntawm matrix thiab cov ntxig ntxig sib txawv, thiab cov matrix yog hnav-tiv taus ntau dua li cov ntxig ntxig (saib cov lus 2).Qhov muaj pes tsawg leeg ntawm ob sab ntawm matrix thiab cov ntxig ntxig yog nyob ze, yog li nws tuaj yeem pom tias cov ntxig rau hauv cov thoob cov hniav feem ntau yog ACTS raws li cov chiller. cov txheej txheem ntawm casting, cov matrix grain yog refined los txhim kho nws lub zog thiab hnav tsis kam.Vim lub cuam tshuam ntawm casting tshav kub, cov qauv ntawm cov ntxig yog zoo ib yam li cov vuam tshav kub cuam tshuam cheeb tsam.Yog hais tias tsim nyog kev kho cua sov yog nqa tawm tom qab. casting los txhim kho cov qauv ntawm matrix thiab ntxig, hnav tsis kam thiab kev pabcuam lub neej ntawm cov hniav yuav pom tseeb.
Post lub sij hawm: Apr-15-2019