Dab tsi yog welding penetration?Nws hais txog qhov tob tob ntawm cov hlau los yog cov hlaws hauv pem hauv ntej ntawm cov hlaws ntawm qhov sib koom ua ke.
Welded pob qij txha muaj xws li: weld seam (0A), fusion zone (AB) thiab tshav kub cuam tshuam cheeb tsam (BC).
Kauj Ruam 1: Sampling
(1) Txiav txoj hauj lwm ntawm vuam nkag mus rau tus qauv: a.Tsis txhob pib thiab nres txoj haujlwm
b.Txiav tawm ntawm 1/3 ntawm weld caws pliav
c.Thaum lub vuam caws pliav ntev dua 20mm, txiav tawm ntawm qhov nruab nrab ntawm qhov caws pliav.
(2) Txiav
A. Txuas cov khoom siv hluav taws xob thiab xyuas seb cov khoom siv ntsuas puas ua tau raws li qhov yuav tsum tau ua;Raws li pom hauv daim duab 1, qhib lub vaj tsev tiv thaiv ntawm lub tshuab txiav metallographic thiab nruab cov qauv hlau thaiv kom raug kuaj.
(Ceeb toom: Nco ntsoov kho cov hlau thaiv kom tiav!)
b.Raws li pom hauv daim duab 2, kaw lub plhaub tiv thaiv ntawm lub tshuab txiav metallographic, qhib lub valve dej, thiab tig lub hwj chim hloov;Tuav tus kov ntawm lub tshuab txiav metallographic thiab maj mam nias nws downward txiav cov qauv hlau.Tom qab txiav, qhov ntev, dav thiab qhov siab ntawm cov qauv hlau yuav tsum tsawg dua 4 hli;Kaw lub valve dej, tua lub hwj chim, thiab tshem tawm cov qauv hlau.
b.Raws li pom hauv daim duab 2, kaw lub plhaub tiv thaiv ntawm lub tshuab txiav metallographic, qhib lub valve dej, thiab tig lub hwj chim hloov;Tuav tus kov ntawm lub tshuab txiav metallographic thiab maj mam nias nws downward txiav cov qauv hlau.Tom qab txiav, qhov ntev, dav thiab qhov siab ntawm cov qauv hlau yuav tsum tsawg dua 4 hli;Kaw lub valve dej, tua lub hwj chim, thiab tshem tawm cov qauv hlau.
Kauj Ruam 3: Corrosion
(1) Raws li qhia hauv daim duab 5, siv cov cawv thiab nitric acid los npaj cov tshuaj tiv thaiv corrosion (3-5% nitric acid thiab cawv) hauv lub khob ntsuas, muab cov qauv hlau tso rau hauv cov tshuaj corrosion los yog siv txhuam me me los ntxuav. qhov txiav nto rau corrosion.Lub sij hawm corrosion yog li ntawm 10-15 vib nas this, thiab cov nyhuv corrosion tshwj xeeb yuav tsum tau kuaj pom.
(2) Raws li qhia hauv daim duab 6, tom qab kev xeb, tshem tawm cov qauv hlau thaiv nrog cov tweezers (ceeb toom: tsis txhob kov cov kua xeb nrog txhais tes), thiab ntxuav cov tshuaj tiv thaiv corrosion ntawm cov hlau qauv thaiv nrog huv. dej.
(1) Tshuab ziab khaub ncaws
Kauj Ruam 4: Kev tshuaj xyuas txoj kev vuam nkag
| T (mm) yog phaj thickness | |||
| Cov qauv qub qub | Kev ntsuas tshiab | ||
| Phaj thickness | Penetration ntaub ntawv | Phaj thickness | Penetration ntaub ntawv |
| ≤3.2 | Saum toj no 0.2 * t | t≤ 4.0 | Saum toj no 0.2 * t |
| 4.0＜ 4.5 | Tshaj 0.8 | ||
| 3.2 ~ 4.5 (nrog rau 4.5) | Tshaj 0.7 | 4.5 t = 8.0 | Tshaj 1.0 |
| t9.0 ua | Saum toj no 1.4 | ||
| ＞ 4.5 | Tshaj 1.0 | t ≥ 12.0 | Tshaj 1.5 |
| Lus Cim: Kev vuam ntawm nyias phaj thiab phaj tuab yog ua raws li cov phaj nyias | |||
(1.2) Welding penetration datum (nrog rau ceg ntev qhia txog kev nkag mus)
| L (mm) yog qhov ntev ntawm ko taw | |
| Taw ntev | Penetration ntaub ntawv |
| L≤8 | 0.2 * L |
| L;8 | siab tshaj 1.5mm |
(2) Vuam nkag mus ntsuas (qhov deb a thiab b yog vuam nkag)
(3) Cov cuab yeej tshuaj xyuas rau vuam nkag
Kauj Ruam 5: Kev tshuaj xyuas daim ntawv qhia txog kev nkag mus rau vuam thiab khaws cov qauv
(1) Welding penetration soj ntsuam daim ntawv qhia:
ib.Ntxiv ntawm daim duab hla ntu ntawm qhov tshuaj ntsuam xyuas
b.Kos qhov ntsuas txoj hauj lwm ntawm vuam nkag rau hauv daim duab
c.Cov ntaub ntawv ntxiv
(2) Cov kev cai ntawm kev khaws cia ntawm cov welding penetration qauv:
ib.Cia ntawm ncej S qhov chaw rau 13 xyoo
b.Feem ntau yuav tsum khaws cia rau 3 xyoos
c.Yog tias lwm yam tau teev tseg hauv daim duab, nws yuav tsum tau ua raws li qhov yuav tsum tau ua ntawm daim duab kos
(Qhov kev tshuaj xyuas qhov chaw nkag tuaj yeem daig nrog pob tshab nplaum kom ncua kev xeb)
Post lub sij hawm: Dec-22-2022