Welding Residual Stress

Welding residual stress inoreva kushushikana kwemukati kunogadzirwa muzvimiro zvakashongedzwa nekuda kwekumanikidzwa kwemafuta deformation panguva yewelding process. Kunyanya, panguva yekunyunguduka, kusimba, uye kutonhora shrinkage ye weld simbi, yakakosha kupisa kushushikana kunogadzirwa nekuda kwezvipingamupinyi, zvichiita kuti ive yekutanga chikamu chekusarira kunetseka. Kusiyana neizvi, kushushikana kwemukati kunobva mukushandurwa kweiyo metallographic chimiro panguva yekutonhora ndiyo chikamu chechipiri chekusarira kunetseka. Iyo yakakura kuomarara kwechimiro uye yakakwirira dhigirii yekumanikidza, iyo yakakura yekusarira kushushikana, uye nekudaro, iyo inonyanya kukosha iyo inokonzeresa pane yemaitiro ekutakura mutoro. Ichi chinyorwa chinonyanya kukurukura maitiro e welding residual stress pane zvivakwa.

Mhedzisiro yeWelding Residual Stress pane Zvimiro kana Zvikamu

Welding residual stress ndiyo yekutanga kushushikana kuripo pamuchinjiko-chikamu chechikamu kunyangwe isati yatakura chero mutoro wekunze. Munguva yehupenyu hwebasa rechikamu, izvi zvakasara zvinonetsa zvinosangana nekunetseka kwekushanda kunokonzerwa nemitoro yekunze, inotungamira kune yechipiri deformation uye kugoverazve kwekunetseka kwakasara. Izvi hazvingodzikisi kuoma uye kugadzikana kwechimiro asiwo, pasi pezvakasanganiswa zvinokonzeresa tembiricha uye zvakatipoteredza, zvinonyanya kukanganisa chimiro chekuneta kwesimba, brittle fracture resistance, kuramba kushushikana nekupwanya corrosion, uye high-temperature creep cracking.

Impact paKuoma Kwemaitiro

Kana iyo yakasanganiswa kushushikana kubva kune ekunze mitoro uye yakasara kushushikana mune imwe nzvimbo yechimiro inosvika pagoho, zvinhu zviri munzvimbo iyoyo zvinozopinda munzvimbo yepurasitiki deformation uye kurasikirwa nekukwanisa kutakura mimwe mitoro, zvichikonzera kuderedzwa kweiyo inoshanda muchinjiko-chikamu. nzvimbo uye, nokudaro, kuoma kwechimiro. Semuyenzaniso, muzvimiro zvine longitudinal uye transverse welds (senge mbabvu yeplate welds paI-matanda), kana izvo zvakatarisana nemoto kutwasanuka, kwakakosha kusara kwekunetsekana kunogona kugadzirwa muzvikamu zvakakura. Kunyangwe kugovaniswa kwezvitsiga izvi pamwe nekureba kwechikamu kungasava kwakawanda, kukanganisa kwavo pakuomarara kunogona kuramba kwakakura. Kunyanya kune matanda akaiswa pasi pekururamisa kwemoto wakawanda, panogona kuve nekuderera kunooneka kwekuomarara panguva yekurodha uye kuderedzwa rebound panguva yekuburitsa, izvo zvisingakwanisi kufuratirwa kune zvivakwa zvine zvakakwirira zvinodikanwa zvedimensional kurongeka uye kugadzikana.

Impact pane Static Load Simba

Kune brittle zvinhu, izvo zvisingakwanisi kuita deformation yepurasitiki, kushushikana mukati mechikamu hakugone kugoverwa zvakaenzana sezvo simba rekunze rinowedzera. Mamiriro ekushushikana acharamba achikwira kusvika asvika pamuganho wegoho rezvinhu, zvichikonzera kutadza kwenzvimbo uye pakupedzisira kutungamirira kukutsemuka kwechikamu chose. Kuvapo kwekunetseka kwakasara muzvinhu zvinoputika kunoderedza simba ravo rekutakura mutoro, zvichiita kuti vatsemuka. Kune ductile zvinhu, kuvapo kwe triaxial tensile residual stress munzvimbo dzakaderera-tembiricha zvinogona kukanganisa kuitika kwepurasitiki deformation, nokudaro kuderedza zvakanyanya simba rekutakura kwechikamu.

Mukupedzisa, welding residual stress ine simba guru pakuita kwezvivakwa. Zvinonzwisisika dhizaini uye maitiro ekugadzirisa anogona kuderedza kusara kunetseka, nekudaro kunowedzera kuvimbika uye kusimba kwezvimiro zvakashongedzwa.