Hauv cov txheej txheem tsim khoom ntawm astm a179txias kos seamless steel yeeb nkab, muaj txias hardening thiab hydrogen embrittlement phenomenon, uas yog tshwm sim los ntawm txias drawn seamless raj cracking lub ntsiab yog vim li cas.

Kev soj ntsuam ntawm qhov tshwm sim ntawm bursting astm a179 txias drawn seamless yeeb nkab yog ib txoj kab uas hla me me ntawm seamless steel yeeb nkab los ntawm kev kos duab tuag rau txias txias sib sau, cov txheej txheem txoj kev yog feem ntau annealing, pickling, kos duab.Txias-daws me me txoj kab uas hla seamless steel yeeb nkab nyob rau hauv cov txheej txheem kev kos duab, qee zaum los ntawm qhov pib mus rau qhov kawg zoo li tib yam li cov cracker xyoob tawg tshwm sim, peb hu qhov tshwm sim no yog tawg.

Cov laj thawj rau cracking yog:

Cov nyhuv ntawm kev ua hauj lwm hardening, cov yeeb nkab steel ua rau ntau cov yas deformation thaum lub sij hawm txias txias, ua rau lub lattice distortion, uas ua rau lub lattice zog thiab tsub kom lub zog sab hauv ntawm cov hlau, uas ua rau cov tsis sib xws nyob rau hauv kev nyuaj siab ntawm cov hlau thiab residual kev nyuaj siab. .Qhov no yuav ua rau cov hlau hardness, toughness txo.Qhov siab dua cov hlau hardness, qhov ntau dua qhov seem sab hauv kev ntxhov siab thaum lub caij txias txias, qhov pom tseeb dua qhov ua haujlwm hardening tshwm sim.Thaum cov residual kev nyuaj siab mus txog ib tug tej yam nqi, cov hlau yuav tsim kua muag raws li ib tug grain interface, qhov tsim ntawm me me steel yeeb nkab tawg.

Cov nyhuv ntawm hydrogen embrittlement, nyob rau hauv tus txheej txheem ntawm descaling nrog acid, sulfuric acid thiab hlau react rau precipitate hydrogen.Hydrogen nkag mus rau hauv cov hlau nyob rau hauv daim ntawv ntawm atoms los yog ions los tsim ib qho kev daws teeb meem.Cov nyhuv ntawm hydrogen ntawm cov khoom siv kho tshuab ntawm hlau yog ib qho ntawm hydrogen embrittlement.