Ib tsab xov xwm yuav pab tau koj yooj yim to taub vuam tsis xws luag - lamellar tawg

Raws li hom kev phom sij tshaj plaws ntawm vuam tsis xws luag, vuam kab nrib pleb cuam tshuam rau kev ua tau zoo, kev nyab xeeb thiab kev ntseeg siab ntawm cov qauv welded. Niaj hnub no, kuv yuav qhia koj txog ib qho ntawm cov kab nrib pleb - lamellar tawg.

Xinfa vuam cov cuab yeej muaj cov yam ntxwv zoo thiab tus nqi qis. Yog xav paub ntxiv, thov mus saib:Vuam & txiav Manufacturers - Tuam Tshoj Vuam & Txiav Hoobkas & lwm tus neeg (xinfatools.com)

01

Non-metallic inclusions. Thaum lub sij hawm dov txheej txheem ntawm cov hlau phaj, qee qhov tsis yog xim hlau suav nrog (xws li sulfides thiab silicates) hauv cov hlau yog dov mus rau hauv ib lub strips sib npaug rau cov kev taw qhia dov, ua rau muaj qhov sib txawv ntawm cov khoom siv ntawm cov hlau. Kev suav nrog yog qhov muaj peev xwm ua rau lamellar tearing hauv cov qauv welded thiab tseem yog lub ntsiab ua rau lamellar tearing.

02

Kev ntxhov siab. Vim tias qhov cuam tshuam ntawm vuam thermal voj voog, kev txwv quab yuam yuav tshwm sim hauv qhov sib koom ua ke. Rau qhov muab T-shaped thiab hla kev sib koom ua ke ntawm dov tuab phaj, nyob rau hauv cov xwm txheej uas cov vuam tsis hloov pauv, muaj qhov tseem ceeb ntawm kev ntxhov siab lossis kev khoov khoov. Lub zog, thaum nws ntau dua qhov nqi no, lamellar tearing yuav tshwm sim.

03

Diffusion ntawm hydrogen. Hydrogen yog qhov txhawb nqa ntawm kev tawg. Vim yog qhov sib txawv thiab sib xyaw ua ke ntawm hydrogen rau hauv cov molecules, cov kev ntxhov siab hauv zos nce siab heev. Thaum hydrogen sib sau ua ke ntawm qhov kawg ntawm kev suav, nws ua rau cov non-metallic inclusions poob adhesion nrog cov hlau thiab rub tawm cov uas nyob ib sab. Cov hlau qhia tau hais tias hydrogen-induced fractured yam ntxwv ntawm lub pob txha tawg.

04

Cov khoom siv hauv paus. Txawm hais tias kev koom ua ke yog qhov tseem ceeb ntawm lamellar tearing, cov khoom siv ntawm cov hlau kuj tseem muaj feem cuam tshuam rau lamellar tearing. Cov yas tawv tawv ntawm cov hlau tsis zoo, thiab cov kab nrib pleb muaj feem ntau yuav nthuav tawm, uas txhais tau hais tias muaj peev xwm tiv taus lamellar tearing tsis zoo.

Txhawm rau tiv thaiv qhov tshwm sim ntawm lamellar cov kab nrib pleb, cov txheej txheem tsim thiab kev tsim kho feem ntau yog kom tsis txhob Z-kev taw qhia kev ntxhov siab thiab kev ntxhov siab. Cov kev ntsuas tshwj xeeb yog raws li hauv qab no:

1. Txhim kho kev sib koom ua ke thiab txo qis kev nruj. Cov kev ntsuas tshwj xeeb muaj xws li: txuas qhov kawg ntawm arc striking phaj rau ib qho ntev kom tsis txhob tawg; Hloov cov txheej txheem weld los hloov cov kev taw qhia ntawm weld shrinkage kev ntxhov siab, hloov lub ntsug arc striking phaj rau kab rov tav arc striking phaj, hloov qhov vuam txoj hauj lwm, ua rau tag nrho cov kev ntxhov siab ntawm kev sib koom ua ke mus rau lub dov txheej tuaj yeem txhim kho lub lamellar. kua muag tsis kam.

2. Txais cov txheej txheem vuam tsim nyog. Nws yog qhov zoo rau kev siv cov txheej txheem qis-hydrogen welding, xws li roj shielded vuam thiab submerged arc vuam, uas muaj qhov sib txawv me me ntawm qhov txias txias thiab muaj txiaj ntsig zoo rau kev txhim kho cov kev tiv thaiv lamellar tearing.

3. Siv cov khoom siv vuam uas muaj zog tsawg. Thaum cov hlau weld muaj qhov taw tes qis thiab siab ductility, nws yooj yim rau kev mloog zoo rau ntawm qhov vuam thiab txo cov strain nyob rau hauv tshav kub-tshem tawm ntawm lub hauv paus hlau, uas tuaj yeem txhim kho qhov kev tiv thaiv rau lamellar tearing.

4. Nyob rau hauv cov nqe lus ntawm daim ntawv thov ntawm vuam tshuab, lub nto surfacing cais txheej yog siv; symmetrical welding yog siv los sib npaug ntawm cov strain faib thiab txo cov strain concentration.

5. Txhawm rau tiv thaiv cov kua muag lamellar los ntawm qhov txias txias, qee qhov kev ntsuas los tiv thaiv qhov txias txias yuav tsum tau txais ntau li ntau tau, xws li tsim nyog ua kom preheating, tswj qhov kub ntawm interlayer, thiab lwm yam.; Tsis tas li ntawd, txoj kev daws kev ntxhov siab xws li intermediate annealing tuaj yeem siv tau.

6. Peb kuj tuaj yeem siv cov txheej txheem vuam ntawm cov vuam me me thiab cov vuam sib txuas los ntawm kev tswj qhov loj ntawm qhov vuam.