Multilateralized Cracks
Muchikamu chakasimba chekristallisation kumberi, pasi pechiito chekushisa kwepamusoro uye kushushikana, zvirema zvelattice zvinofamba uye zvakaunganidzwa kuti zvigadzire muganho wechipiri, uri mupurasitiki yakaderera pane tembiricha, uye kuputika kunogadzirwa pasi pekuita kwekushushikana. Multilateral makatsemuka anowanzoitika mu welds yesimbi yakachena kana imwe-chikamu austenitic alloys kana padyo nemusono, uye ivo ndeverudzi rwekutsemuka kunopisa.
Reheat Cracks
Kune masimbi ane gobvu-plate welded chimiro uye mamwe emvura-anosimbisa alloying zvinhu, mitswe inoitika munzvimbo dzakaomarara-yakaomeswa dzenzvimbo yewelding inopisa-yakakanganiswa zone panguva yekushushikana kwekupisa kurapwa kana sevhisi pane imwe tembiricha inonzi reheat cracks. Kupisa zvakare kutsemuka kunowanzoitika munzvimbo dzakaomarara-zviyo zvewelding inopisa-inopisa nzvimbo yepasi-alloy yakakwirira-yakasimba simbi, pearlitic inodzivirira kupisa simbi, austenitic Stainless simbi uye mamwe nickel-based alloys.
Cold Cracks
Cold cracks imhando yakajairika yekutsemuka inogadzirwa muwelding, iyo inogadzirwa kana tembiricha yatonhodzwa kusvika kune yakaderera tembiricha mushure mekugadzira. Cold cracks inowanzoitika munzvimbo yekupisa yakakanganiswa yesimbi yakaderera alloy, yepakati alloy simbi, yepakati kabhoni uye yakakwira kabhoni simbi. Muzviitiko zvemunhu mumwe nemumwe, senge kana welding masimbi e-ultra-high-simba kana mamwe titanium alloys, kuputika kunotonhora kunoonekwawo pasimbi yeweld.
Zvinoenderana nemhando dzakasiyana dzesimbi uye zvimiro zvekusungirirwa, kune zvakare akasiyana marudzi eanotonhora makatsemuka, ayo anogona kukamurwa zvakakamurwa muzvikamu zvitatu zvinotevera:
Delayed Crack
Icho chimiro chakajairika chekutsemuka kunotonhora. Chinhu chayo chikuru ndechekuti hachioneki pakarepo mushure mekuputika, asi ine nguva yakawanda yekuisa, uye inoputika nemaitiro anononoka anogadzirwa pasi pechiito chakabatanidzwa chekuoma kwakaoma, hydrogen uye kuzvidzora kunetseka.
Kudzima Matswe
Rudzi urwu rwekutsemuka harunonoke, rinowanikwa pakarepo mushure mekugadzira, dzimwe nguva rinoitika muweld, dzimwe nguva rinoitika munzvimbo inopisa. Kunyanya kune chimiro chakaomeswa, kuputika kunogadzirwa pasi pechiito che welding stress.
Yakaderera Plastic Embrittlement Crack
Kune zvimwe zvinhu zvine purasitiki yakaderera, kana kuchitonhora kusvika kune yakaderera tembiricha, kuomarara kunokonzerwa ne shrinkage simba rinopfuura chengetedzo yepurasitiki yezvinhu pachayo kana kutsemuka kunokonzerwa neiyo zvinhu kuita brittle. Nekuti inogadzirwa pane yakaderera tembiricha, iri zvakare imwe nzira yekutonhora kutsemuka, asi hapana kunonoka chiitiko.
Laminar Kubvarura
Mukugadzira mapuratifomu makuru ekugadzira oiri uye makobvu-ane madziro ekumanikidza midziyo, nhanho inotsemuka inoenderana neinotenderedza nzira dzimwe nguva inoitika, iyo inonzi laminar kubvarura.
Kunyanya nekuda kwekuvapo kweiyo layered inclusions (pamwe negwara rekutenderedza) mukati mesimbi ndiro, kushushikana kunoitwa panguva yewelding kunoenderana negwara rekukunguruka, zvichikonzera "yakatsika" yakaturikidzana chimiro munzvimbo yakakanganiswa kupisa kure nemoto. yakabvaruka.
Stress Corrosion Cracking
Kunonoka kutsemuka kwezvimwe zvimiro zvakashongedzwa (zvakadai semidziyo nemapombi) pasi pechiito chakabatanidzwa chezvekuora media uye kushushikana. Izvo zvinokanganisa kushushikana kwecorrosion kuparuka zvinosanganisira zvinhu zvechimiro, rudzi rwekuora svikiro, chimiro chechimiro, kugadzira uye welding process, welding zvinhu, uye dhigirii rekurerutsira. Stress corrosion inoitika panguva yebasa.
Nguva yekutumira: Kubvumbi-24-2022