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Sei stomata ichionekwa?

1.1 Mukati megomba relaser welded gomba mune isina kugadzikana yevibration state, uye kuyerera kwegomba nedziva rakanyungudutswa kwakanyanyisa.Iyo mhute yesimbi mukati megomba inoputika ichienda kunze uye inotungamiraiyo steam vortexyakaumbwa pakuvhurwa kwegomba, iro rinotenderedza gasi rinodzivirira (Ar) muzasi megomba, uyegomba rinoenda mberi, magasi anodzivirira aya achapinda mudziva rakanyungudutswa nenzira yemabhuru.Nekuda kwekudzika kwakanyanya kunyungudika kweAr uye nekukurumidza kutonhora mwero welaser welding, mabhuru anosiiwa mumusono we weld asati atiza.kuita stomata.Uyezve, zvaivezvakakonzerwa nekusadzivirirwa kwakashata panguva yekugadzira iyo nitrogen inopinda mudziva rakanyungudutswa kubva kunze, uye kunyungudika kwenitrogen musimbi yemvura kwakasiyana kwazvo nekunyungudika kwenitrogen musimbi yakasimba.Naizvozvo mukutonhora uye kusimba kwesimbi, kunyungudika kwenitrogen kunodzikira nekudzikira kwetembiricha kana simbi yakanyungudutswa yedhamu ichitonhodzwa kusvika pakatanga crystallization inogona kutungamirira mukuderera kukuru kamwe kamwe mukunyungudika.Panguva ino, gasi rinowedzera mvura yakawandagadzira mabubbles.Kana chiyero chekuyangarara chemabhuru chiri pasi peiyo simbi crystallization rate, ma pores anogadzirwa.

Iyo nzira yelaser fusion welding inodzvanya porosity

1. Dzvinyirira welding pores ne-pre-welding surface treatment

Pre-welding surface treatment inzira inoshanda yekudzora mametallurgical pores ealuminium alloy laser welds.Iyo nzira dzekurapa dzepamusoro dzinogona kukamurwa kuitakucheneswa kwemichina yemuviri uye kuchenesa makemikarikazhinji.

Mushure mekuenzanisa, kutora nzira yemakemikari yekutarisana nepamusoro pebhokisi rekuongorora (simbi yekuchenesa kuchenesa - kushambidza - alkali kushambidza - kushambidza - kushambidza - kushambidza - kuomesa) ndiyo yakanakisisa.Pakati pavo, iyo alkali yekugezesa inobviswa kubva pahukobvu hwepamusoro pechinhu chine mvura ine mvura ye25% NaOH (sodium hydroxide), uye kunhonga kunoitwa ne20% HNO3 (nitric acid) + 2% HF (hydrogen fluoride. ) mushonga wemvura wokuderedza lipo yasara.Mushure mekurapa kwepamusoro kwendiro yekuedzwa, iyo welding inoitwa mukati meawa makumi maviri nemana, uye gungano risati ravepo rinounganidzwa rakapukutwa nedoro reanhydrous apo ndiro yekuyedza inogadzikwa kwenguva yakareba mushure mekurapwa kweplate.

2. Inhibit welding pores ne welding process parameters

Iko kuumbwa kwe weld porosity haina hukama chete nemhando ye weldment surface treatment, asiwo ine chekuita ne welding process parameters.Kufuridzirwa kwemagetsi emagetsi pamapores e weld kunonyanya kuratidzwa mukupinda kwe weld, ndiko kuti, pesvedzero yehupamhi hwemashure reshiyo ye weld pane pores.

Bykuedzatinogona kuziva izvozvozvinogona kuoneka kuti kana weld back width reshiyo R iri> 0.6, iyo yakanyanya kugoverwa yeketani pores mu weld inogona kuvandudzwa..Uye kana reshiyo yehupamhi hwemashure R iri> 0.8, kuvepo kwemapores emuchadenga muweld kunogona kuvandudzwa.Uyezve, zvakasara zvepores mu weld zvinogona kubviswa kusvika pamwero mukuru.

3. Inhibit welding pores nekusarudza zvakakodzera kudzivirira gasi uye kuyerera kwehuwandu

Kusarudzwa kwegasi rinodzivirira kunobata kunaka, kushanda uye mari ye welding zvakananga.Mukuita kwelaser welding, kuridza kwakaringana kwegasi rinodzivirira kunogona kuderedza weld pores zvinobudirira.

Sezvinoratidzwa mumufananidzo uri pamusoro, Ar (argon) uye He (helium) inoshandiswa kuchengetedza pamusoro peiyo weld.Mukuita kwealuminium alloy laser welding, Ar uye Iye ane madhigirii akasiyana eionization yelaser izvo zvinoguma nekuumbwa kwakasiyana kweweld.Zvinogona kuonekwa kuti porosity ye weld inowanikwa nekushandisa Ar sekudzivirira gasi ishoma pane iyo weld paAnosarudzwa sevhavha yekudzivirira.

Panguva imwecheteyo, tinofanirawo kubhadhara kune chokwadi chokuti gasi rinoyerera rakanyanya kuduku (<10L/min) uye nhamba huru yeplasmas.inogadzirwa ne welding haigone kupeperetswa,izvo zvichaitaiyo welding pool haina kugadzikana uye mukana wekugadzira porosity uchiwedzera.Kana iyo ine mwero gasi kuyerera mwero (inenge 15L/min) plasma inodzorwa zvinobudirira uye gasi rinodzivirira rinotamba yakanaka anti-oxidation mhedzisiro pane yakanyungudutswa.dziva,ichaita porosity shoma.Kuwedzera kwegasi kuyerera kunoperekedzwa nemhepo yakawandisa gasi, kuitira kuti chikamu chekudzivirira gasi chinosanganiswa mukati metangi, izvo zvinoita kuti porosity isimuke.

Yakakanganiswa nekushanda kwechinhu chacho pachayo, iyohaikwanisekuva zvachose kudzivisa kuti welding pasina generatingporositymukuita welding.Chainokwanisa kuwana ndikokuderedza porosityrate.