Har'a tseli-valve tse tsamaisang khatello of liphaephe tsa indasteri, li-valve tse entsoeng ka tšepeli sebelisoa haholo ka lebaka la moruo oa tsona oa litšenyehelo le ho feto-fetoha ha moralo.Leha ho le joalo, hobane ts'ebetso ea ho lahla e thibetsoe ke boholo, botenya ba lerako, boemo ba leholimo, lisebelisoa tse tala le ts'ebetso ea kaho ea ho lahla, mefokolo e fapaneng ea ho lahla e kang blisters, pores, cracks, shrinkage porosity, shrinkage cavities le inclusions e tla hlaha ka har'a li-castings, haholo matsoai a lehlabathe.Lisebelisoa tsa tšepe bakeng sa tse ling.Ka lebaka la hore ha tšepe e qhibilihisoa, ho na le lintho tse ngata tse kopantsoeng ka har'a tšepe, ho na le monyetla o moholo oa ho hlahisa bofokoli ba tšepe.Ka hona, ho tsebahatsa mefokolo le ho etsoa ha mokhoa o utloahalang, oa moruo, o sebetsang le o ka tšeptjoang oa ho lokisa welding ho netefatsa hore valve ka mor'a ho lokisa welding e finyella litlhoko tsa boleng e fetohile ntho e tloaelehileng ea ho sebetsana le mocheso o chesang le o batang.li-valve.Sehlooho sena se hlahisa mokhoa oa ho lokisa welding le phihlelo ea liphoso tse 'maloa tse tloaelehileng tsa ho lahla tšepe (thupa ea welding e emeloa ke letšoao la khale).
Ho sebetsana le liphoso
1. Fokotsa kahlolo
Ts'ebetsong ea tlhahiso, mefokolo e meng ea ho lahla ha e lumelloe ho lokisa welding, joalo ka mapetsong a phunyeletsang, mefokolo e phunyeletsang (ka tlase e phunyeletsang), li-pores tsa khekhe ea linotši, li-inclusions tsa lehlabathe tse ke keng tsa tlosoa, le shrinkage porosity e nang le sebaka se fetang lisenthimithara tse 65, joalo-joalo. le Litšitiso tse ling tse kholo tse ke keng tsa lokisoa joalo ka ha ho lumellane ka konteraka lipakeng tsa mekha e 'meli.Mofuta oa sekoli o lokela ho ahloloa pele o lokisa welding.
2. Ho tlosoa ha sekoli
Fekthering, carbon arc air gouging hangata e sebelisoa ho bululela mefokolo ea ho lahlela, ebe ho sebelisoa grinder e nkehang ea angle ho bentša likarolo tse nang le bothata ho hlahisa tšepe e khanyang.Empa ts'ebetsong ea tlhahiso, ho feta ho sebelisa electrode ea tšepe ea carbon e nang le boemo bo phahameng ba hona joale ho tlosa mefokolo, 'me u sebelise grinder ea angle ho sila tšepe ea tšepe.Ka kakaretso, liphoso tsa ho lahla li ka felisoa ka ho sebelisa <4mm-J422 electrode le hona joale ea 160-180A ho tlosa liphoso.Sesila sa angle se sila sekoli hore e be sebopeho sa U ho fokotsa khatello ea maikutlo.Litšitiso li tlosoa ka ho feletseng, 'me boleng ba ho lokisa welding bo botle.
3. Ho futhumatsa ha likarolo tse nang le phoso
Bakeng sa lisebelisoa tsa tšepe tsa carbon steel le austenitic stainless steel castings, moo sebaka sa ho lokisa tjheseletsa se ka tlase ho 65cm2 mme botebo bo ka tlase ho 20% kapa 25mm ea botenya ba ho lahla, preheating hangata ha e hlokehe.Leha ho le joalo, bakeng sa lisebelisoa tsa tšepe tsa pearlitic tse kang ZG15Cr1Mo1V le ZGCr5Mo, ka lebaka la tšekamelo e phahameng ea ho thatafala ha tšepe le ho phunyeha ha bonolo ha ho chesehela ho batang, preheating e lokela ho etsoa.Nako ea ho ts'oara e lokela ho ba bonyane 60min.Haeba ho lahla ho ke ke ha futhumatsa ka kakaretso, ho ka futhumatsoa ho 300-350 ° C ka oksijene-acetylene sebakeng se nang le bokooa 'me ea atolosoa ka 20mm (ho shebella bofubelu bo lefifi sebakeng se lefifi), le lelakabe le leholo le sa nke lehlakore. sethunya se sebelisoa pele sekoli le libaka tse haufi.Sosa selikalikoe ka potlako ka metsotso e seng mekae, ebe u tsamaea butle ka metsotso e 10 (ho itšetlehile ka botenya ba sekoli), e le hore sekoli se chesoe ka ho feletseng ebe se lokisoa ka potlako.
Bakeng sa lintlha tse ling, ka kopo etelawww.cvgvalves.com.Ikopanyesales@cvgvalves.com.