Nekuwedzera humwe huwandu hwezvimwe zvinhu zvekukandira simbi, alloy cast iron ine yakakwira corrosion resistance mune mamwe midhiya inogona kuwanikwa. Yakakwira silicon yakakanda simbi ndeimwe yeanonyanya kushandiswa. Mutsara we alloy cast irons ine 10% kusvika 16% silicon inonzi yakakwira silicon cast irons. Kunze kwemhando shoma dzine 10% kusvika 12% silicon, zvinyorwa zvesilicon zvinowanzobva pa14% kusvika 16%. Kana iyo silicon yemukati iri pasi pe14.5%, iyo mechaniki zvivakwa inogona kuvandudzwa, asi kuramba kwecorrosion kwakadzikira zvakanyanya. Kana iyo silicon yemukati inosvika kupfuura 18%, kunyangwe isingaite corrosion, iyo alloy inova brittle uye haina kukodzera kukanda. Naizvozvo, iyo inonyanya kushandiswa muindasitiri ndeye yakakwira silicon cast iron ine 14.5% kusvika 15% nesilicon. [1]
Mazita ekutengeserana kunze kwenyika epamusoro silicon cast iron iDuriron neDurichlor (ine molybdenum), uye chimiro chadzo chemakemikari inoratidzwa mutafura iri pazasi.
| model | Zvikamu zvikuru zvemakemikari,% | ||||||
| silicon | molybdenum | chromium | manganese | sarufa | phosphorus | iron | |
| High silicon yakakanda simbi | 〉14.25 | - | - | 0.50～0.56 | 〈0.05 | 〈0.1 | Ramba |
| Molybdenum ine yakakwira silicon yakakanda simbi | 〉14.25 | 〉3 | 少量 | 0.65 | 〈0.05 | 〈0.1 | Ramba |
Corrosion resistance
Chikonzero nei yakakwira-silicon yakakanda simbi ine silicon inodarika 14% ine yakanaka corrosion resistance ndeyekuti silicon inoumba firimu rinodzivirira rinoumbwa neNot corrosion resistant.
Kazhinji kutaura, yakakwira silicon cast iron ine yakanakisa corrosion kuramba mune oxidizing midhiya uye mamwe ekudzikisa asidhi. Inogona kumira kudziya kwakasiyana-siyana uye kudzika kwe nitric acid, sulfuric acid, acetic acid, hydrochloric acid pane yakajairika tembiricha, fatty acids uye mamwe akawanda media. ngura. Iyo haidzivirirwe nekuora nevezvenhau senge high-temperature hydrochloric acid, sulfurous acid, hydrofluoric acid, halogen, caustic alkali solution uye alkali yakanyungudutswa. Chikonzero chekushaikwa kwekupokana kwekuora ndechekuti iyo inodzivirira firimu iri pamusoro inonyungudika pasi pechiito che caustic alkali, uye inova gaseous pasi pechiito che hydrofluoric acid, iyo inoparadza inodzivirira firimu.
Mechanical properties
High-silicon cast iron yakaoma uye brittle ine urombo mechanical properties. Inofanirwa kudzivirira kutakura maitiro uye haigone kushandiswa kugadzira midziyo yekumanikidza. Castings kazhinji haigone kugadzirwa kunze kwekukuya.
Machining performance
Kuwedzera mamwe alloying zvinhu kune yakakwira silicon cast iron inogona kuvandudza machining ayo kuita. Kuwedzera isingawanzo pasi magnesium alloy kune yakakwirira-silicon yakakandwa simbi ine 15% silicon inogona kuchenesa uye degas, kuvandudza matrix chimiro chesimbi yakakandwa, uye spheroidize iyo graphite, nekudaro inovandudza simba, kushora kusagadzikana uye kugadzirisa kushanda kwesimbi yakakandwa; yekukandira Performance yave nani. Pamusoro pekukuya, iyi yakakwira-silicon yakakandwa simbi inogona zvakare kushandurwa, kutepwa, kudhirowa, uye kugadziriswa mune mamwe mamiriro. Zvisinei, haisati yakakodzera kutonhora kamwe kamwe uye kupisa kamwe kamwe; kurwisa kwayo kusimba kuri nani pane kuya kweyakajairika high-silicon cast iron. , iyo yakagadziridzwa midhiya yakangofanana.
Kuwedzera 6.5% kusvika 8.5% mhangura kune yakakwirira silicon cast iron ine 13.5% kusvika 15% silicon inogona kuvandudza machining performance. Iyo corrosion resistance yakafanana neyakajairika high silicon cast iron, asi yakaipisisa mu nitric acid. Ichi chinyorwa chakakodzera kugadzira pombi impellers uye maoko anopokana nekuora kwakasimba uye kupfeka. Iyo machining performance inogona zvakare kuvandudzwa nekudzikisa iyo silicon yemukati uye nekuwedzera alloying zvinhu. Kuwedzera chromium, mhangura uye zvisingawanzo pasi zvinhu kune silicon cast iron ine 10% kusvika 12% silicon (inonzi yepakati ferrosilicon) inogona kuvandudza brittleness uye processability. Inogona kushandurwa, kudhonzwa, kubatwa, nezvimwewo, uye mune dzakawanda midhiya, iyo corrosion resistance ichiri padyo neiyo yepamusoro silicon cast iron.
Mune yepakati-silicon yakakandwa simbi ine silicon inoenderana ne10% kusvika 11%, pamwe ne1% kusvika 2.5% molybdenum, 1.8% kusvika 2.0% mhangura uye 0.35% isingawanzo zvinhu zvepasi, machining performance inovandudzwa, uye inogona kushandurwa uye resistant. Iyo corrosion resistance yakafanana neyepamusoro silicon cast iron. Kudzidzira kwakaratidza kuti rudzi urwu rwesimbi yakakandwa inoshandiswa seinodzikisira yekudzikisa nitric acid pombi mukugadzira nitric acid uye impeller ye sulfuric acid inotenderera pombi yekuomesa chlorine, uye mhedzisiro yacho yakanaka kwazvo.
Iyo yataurwa pamusoro-yakakwirira-silicon yakakandwa simbi ine kushomeka kwekudzivirira kune hydrochloric acid corrosion. Kazhinji, vanogona chete kuramba ngura mune yakaderera-concentration hydrochloric acid pane tembiricha yekamuri. Kuti uvandudze kushorwa kweiyo yakakwira silicon cast iron muhydrochloric acid (kunyanya inopisa hydrochloric acid), iyo molybdenum inogona kuwedzerwa. Semuenzaniso, kuwedzera 3% kusvika 4% molybdenum kune yakakwira silicon cast iron ine silicon inosvika 14% kusvika 16% inogona kuwana Molybdenum-ine high-silicon cast iron inoumba molybdenum oxychloride inodzivirira firimu pamusoro pekukanda pasi chiito che hydrochloric acid. Haina kunyungudika muhydrochloric acid, nekudaro ichiwedzera zvakanyanya kugona kwayo kurwisa hydrochloric acid corrosion pakupisa kwakanyanya. Kuramba kwecorrosion kunoramba kusingachinji mune mamwe ma media. Iyi yakakwirira-silicon yakakandwa simbi inonziwo chlorine-resistant cast iron. [1]
Yakakwira silicon yakakanda simbi yekugadzirisa
Yakakwira silicon yakakandwa simbi ine zvakanakira kuomarara kwepamusoro (HRC = 45) uye yakanaka corrosion resistance. Yakave ichishandiswa sechinhu che mechanic seal friction pairs mukugadzirwa kwemakemikari. Sezvo simbi yakakandwa ine 14-16% silicon, yakaoma uye ine brittle, kune mamwe matambudziko mukuigadzira. Nekudaro, kuburikidza nekuenderera mberi kwekuita, zvakaratidzwa kuti yakakwira-silicon cast iron inogona kuramba ichigadzirwa mune mamwe mamiriro.
Yakakwira silicon yakakandwa simbi inogadziriswa pa lathe, iyo spindle kumhanya inodzorwa pa 70 ~ 80 rpm, uye chekushandisa chiri 0.01 mm. Kusati kwaita hutsinye, mipendero yekukanda inofanira kunge yabviswa. Huwandu hwekudyisa huwandu hwehukasha hwekutendeuka hunowanzo 1.5 kusvika 2 mm kune workpiece.
Iyo inoshandura musoro wemidziyo ndeye YG3, uye chidzitiro chemidziyo isimbi yekushandisa.
Nzira yekucheka inopesana. Nekuti yakakwirira-silicon yakakandwa simbi yakanyanya brittle, kucheka kunoitwa kubva kunze kuenda mukati zvinoenderana neyakajairwa zvinhu. Pakupedzisira, makona achaputirwa uye mipendero ichave yakasvibiswa, zvichiita kuti workpiece iparadzwe. Zvinoenderana nekuita, reverse kucheka kunogona kushandiswa kudzivirira kucheka uye kucheka, uye yekupedzisira kucheka huwandu hwebanga rechiedza kunofanirwa kuve diki.
Nekuda kwekuoma kwakanyanya kwe-high-silicon cast iron, iyo huru yekucheka maturusi ekutenderedza maturusi akasiyana kubva kune akajairwa kutendeuka maturusi, sezvakaratidzwa pamufananidzo uri kurudyi. Idzo mhando nhatu dzematurusi ekushandura mumufananidzo ane negative rake angles. Icho chikuru chekucheka uye chechipiri chekucheka kwechigadziro chekushandura chine makona akasiyana maererano nekushandiswa kwakasiyana. Mufananidzo a unoratidza chemukati uye chekunze chitenderedzwa chinotenderedza chishandiso, hombe yekutsauka angle A = 10 °, uye yechipiri deflection angle B = 30 °. Mufananidzo b unoratidza magumo ekushandura, hombe yekudzikisa kona A=39°, uye yechipiri declination angle B=6°. Mufananidzo C unoratidza iyo bevel inoshandura chishandiso, iyo huru deflection angle = 6 °.
Kuchera makomba mune yakakwira-silicon cast iron inowanzogadziriswa pamushini unofinha. Iyo yekumhanyisa kumhanya ndeye 25 kusvika 30 rpm uye huwandu hwekudya ndeye 0.09 kusvika 0.13 mm. Kana dhayamita yekuchera iri 18 kusvika 20 mm, shandisa simbi yemidziyo ine kuoma kwepamusoro kukuya spiral groove. (Groove haifanire kunge yakadzika zvakanyanya). Chidimbu cheYG3 carbide chakamisikidzwa mudhiri bhiti musoro uye pasi kusvika pakona yakakodzera kuchera zvinhu zvakajairika, saka kuchera kunogona kuitwa zvakananga. Semuenzaniso, pakuchera gomba rakakura kudarika 20 mm, unogona kutanga uboora maburi 18 kusvika ku20, uye wozoita chiboorero maererano nehukuru hunodiwa. Musoro weiyo drill bit wakabatanidzwa nezvidimbu zviviri zve carbide (YG3 zvinhu zvinoshandiswa), uye zvino inogadzika kuita semicircle. Wedzera gomba kana kurishandura nesaber.
application
Nekuda kweiyo yepamusoro asidhi corrosion kuramba, yakakwira silicon cast iron yakashandiswa zvakanyanya kudzivirira kemikari yekudzivirira. Iyo yakajairika giredhi ndeye STSil5, iyo inonyanya kushandiswa kugadzira acid-inodzivirira centrifugal pombi, pombi, shongwe, zvinopisa kupisa, midziyo, mavharuvhu nemachongwe, nezvimwe.
Kazhinji kutaura, high-silicon cast iron haina brittle, saka kungwarira kukuru kunofanirwa kutorwa panguva yekuisa, kugadzirisa, uye kushandiswa. Usarove nenyundo panguva yekuisa; gungano rinofanira kuva rakarurama kuti udzivise kuisa pfungwa dzepfungwa; kuchinja kwakanyanya mumutsauko wekushisa kana kupisa kwenzvimbo kunorambidzwa zvakanyanya panguva yekushanda, kunyanya kana uchitanga, kumira kana kuchenesa, kupisa uye kutonhora kunofanira kunonoka; haina kukodzera kushandiswa semidziyo yekumanikidza.
Inogona kugadzirwa kuva akasiyana corrosion-resistant centrifugal pombi, Nessler vacuum pombi, machongwe, mavharuvhu, akasarudzika-akavezwa pombi uye pombi majoini, pombi, venturi maoko, cyclone separators, denitrification shongwe uye shongwe dzekugezesa, mavira evasungwa nemichina yekuwachira, etc. Mukugadzirwa kweconcentrated nitric acid, tembiricha yenitric acid yakakwira kusvika 115 kusvika 170°C kana ichishandiswa sembiru yekubvisa. Iyo concentrated nitric acid centrifugal pump inobata nitric acid ine concentration inosvika 98%. Inoshandiswa sechinhu chinopisa kupisa uye shongwe yakarongedzwa yeasidhi yakasanganiswa yesulfuric acid uye nitric acid, uye iri mumamiriro akanaka. Mabira ekudziisa peturu mukunatsa kugadzirwa, acetic anhydride distillation shongwe uye benzene distillation shongwe dze triacetate cellulose kugadzirwa, asidhi pombi ye glacial acetic acid kugadzirwa uye liquid sulfuric acid kugadzirwa, pamwe akasiyana asidhi kana munyu mhinduro pombi nemachongwe, nezvimwe. ese anoshandiswa mukushanda kwepamusoro-soro. Silicon yakakanda simbi.
Yakakwira silicon copper cast iron (GT alloy) inoshingirira kune alkali uye sulfuric acid corrosion, asi kwete kune nitric acid corrosion. Iyo ine zvirinani alkali kuramba pane aluminium cast iron uye yakakwirira kupfeka kuramba. Inogona kushandiswa mumapombi, ma impellers uye mabhushi ayo anonyanya kuodza uye ari pasi pekupfeka slurry.
Nguva yekutumira: May-30-2024
