Page 37 - Steel Tech India eMagazine Volume October 2023
P. 37
92/ Ć ,668( Ć 2FWREHU
VWUHVVHV DUH UHPRYHG GXH WR ZKLFK LW EHFRPHV OHVV
VXVFHSWLEOH WR FUDFNLQJ
$GYDQFH WHFKQRORJLHV XVHG LQ (5: WXEHV DQG
SLSHV
3KDVHG DUUD\
,W LV D WHFKQRORJ\ PRVWO\ XVHG LQ WKH ¿HOG RI LQVSHFWLRQ
RI (5: WXEHV DQG SLSHV IRU GHWHFWLRQ RI GHIHFWV
XVLQJ 1'7 7KLV WHFKQRORJ\ XWLOL]HV D VHW RI PXOWLSOH
ultrasonic transducers that can be electronically )LJ 3RLQW IRFXVHG WDQGHP PHWKRG XVLQJ SKDVHG
controlled to generate and receive ultrasonic waves DUUD\ WHFKQLTXH
IURP PXOWLSOH DQJOHV 7KH PHFKDQLVP RI SKDVHG DUUD\ RU R[\JHQ FDQ EH XVHG DV D VKLHOGLQJ JDV IRU (5: 7KH
scanning involves electronically controlling the phase FKHPLFDO LQHUWQHVV RI WKH PDWHULDO HQVXUHV WKDW WKH\
DQG WLPLQJ RI WKH XOWUDVRQLF EHDPV LW DOORZV SUHFLVH ZRQ¶W UHDFW ZLWK WKH KRW PHWDO SUHVHUYLQJ WKH LQWHJULW\
VFDQQLQJ RI WKH HQWLUH ZHOG VHDP DQG DGMDFHQW DUHDV RI WKH ZHOG 7KH ÀRZ UDWH RI WKH VKLHOGLQJ JDV PXVW EH
%\ DGMXVWLQJ WKH SKDVH DQG WLPLQJ RI HDFK WUDQVGXFHU¶V FDUHIXOO\ FRQWUROOHG WR PDLQWDLQ WKH SURWHFWLYH EDUULHU
ZDYH HPLVVLRQ WKH XOWUDVRQLF EHDP FDQ EH HႇHFWLYHO\ DQG VWDELOL]H WKH ZHOGLQJ DUF 7KH ÀRZ UDWH RI WKH
[11]
VWHHUHG LQ GLႇHUHQW GLUHFWLRQ
VKLHOGLQJ JDV PXVW EH FDUHIXOO\ FRQWUROOHG IRU DFKLHYLQJ
6LQ ș Ȝ Q G D JRRG SURWHFWLYH EDUULHU DQG VWDELOL]LQJ WKH ZHOGLQJ DUF
Where, 7KH PHFKDQLVP RI XVLQJ VKLHOGLQJ JDV LQ (5: WXEHV
and pipes has been explained with greater details,
Ĭ DQJOH RI EHDP VWHHULQJ
• 3URWHFWLRQ IURP DWPRVSKHULF FRQWDPLQDQWV
Q PRGH RI WKH ZDYH XVXDOO\ IRU VKHDU ZDYHV
During the tube or pipe welding via ERW
G VSDFLQJ EHWZHHQ WUDQVGXFHUV PHWKRGRORJ\ WKHUH LV DQ HOHFWULF DUF EHWZHHQ WKH
Ȝ ZDYHOHQJWK HGJHV RI WXEHV RU SLSHV 7KLV DUF SURGXFHV LQWHQVH
KHDW ZKLFK PHOWV WKH HGJHV RI WKH ZRUNSLHFH DQG
,W JHQHUDWHV & VFDQ UHSUHVHQWDWLRQ RI WKH LQVSHFWHG IRUPV D PROWHQ SRRO ,Q WKH DEVHQFH RI VKLHOGLQJ
DUHD PDNLQJ LW HDVLHU IRU WKH LQVSHFWRUV WR YLVXDOL]H JDV WKH KRW PHWDO LV H[SRVHG WR WKH VXUURXQGLQJ
and interpret the results. It is at par with the traditional DWPRVSKHUH FRQWDLQLQJ R[\JHQ QLWURJHQ DQG
XOWUDVRQLF WHVWLQJ ZKLFK LQYROYHV PRYHPHQW RI WKH RWKHU JDVHV 7KHVH JDVHV FDQ IXUWKHU UHDFW ZLWK
WUDQVGXFHUV ZKHUHDV LQ FDVH RI SKDVHG DUUD\ LW DOORZV WKH PROWHQ PHWDO SRRO DQG OHDG WR VHYHUDO GHIHFWV
VFDQQLQJ RI ODUJH VHFWLRQV ZLWKRXW WKH QHHG WR SK\VLFDOO\ VXFK DV R[LGDWLRQ RI PROWHQ PHWDO 7KH R[LGDWLRQ
PRYH WKH WUDQVGXFHUV )XUWKHUPRUH WKH EHDP FDQ EH RI PROWHQ PHWDO UHVXOWV LQ IRUPDWLRQ RI R[LGHV
IRFXVHG RQ D VSHFL¿F GHSWK ] WKH IRFXVHG GHSWK LV WKDW ZHDNHQ WKH ZHOG MRLQW DQG FUHDWH GHIHFWV
UHODWHG WR WKH WLPH GHOD\ W DSSOLHG WR WKH ZDYH HPLWWHG $QRWKHU LVVXH LV ZLWK WKH QLWURJHQ SLFNXS ZKHUHLQ
by each transducer .
> @
WKH QLWURJHQ GLႇXVHV WKURXJK WKH PROWHQ PHWDO
ǻ W ] F SRWHQWLDOO\ OHDGLQJ WR HPEULWWOHPHQW DQG UHGXFHG
where, weld quality.
] GHVLUHG IRFXVHG GHSWK • 6WDELOL]DWLRQ RI WKH DUF Shielding gas helps in
VWDELOL]DWLRQ RI WKH DUF DV LW SUHYHQWV DWPRVSKHULF
F YHORFLW\ RI VRXQG LQ WKH PDWHULDO
JDVHV IURP HQWHULQJ LQVLGH WKH DUF ]RQH DQG
$V WKH ZDYHV SURSDJDWH WKURXJK WKH PDWHULDO DQG WKHUHE\ PDLQWDLQLQJ D FRQVWDQW DWPRVSKHUH ,W
HQFRXQWHU LQWHUIDFHV RU GHIHFWV WKH\ DUH UHÀHFWHG DQG DOVR KHOSV LQ HQVXULQJ D VPRRWK FRQVLVWHQW ÀRZ RI
received by the transducers. Hence, by analysing the HOHFWULFLW\ WKURXJK WKH DUF PDLQWDLQ D VWHDG\ KHDW
WLPH RI ÀLJKW DQG DPSOLWXGH RI WKH UHFHLYHG VLJQDOV source.
LPDJHV DQG VFDQV FDQ GHSLFW WKH LQWHUQDO VWUXFWXUH RI • &RROLQJ DQG VROLGL¿FDWLRQ These gases also
WKH PDWHULDO LQFOXGLQJ WKH ORFDWLRQV DQG FKDUDFWHULVWLFV play a pivotal role in the post welding process as
RI DQ\ GHIHFWV
WKH PROWHQ PHWDO FRROV DQG VROLGL¿HV WR IRUP D ZHOG
6KLHOGLQJ JDV EHDG DQG ZKLFK UHTXLUHV XQLIRUP VROLGL¿FDWLRQ DQG
6KLHOGLQJ JDV DUH W\SLFDOO\ LQHUW RU VHPL LQHUW $UJRQ KHQFH SUHYHQWLQJ ZHOG GHIHFWV
+HOLXP RU PL[WXUH RI WKHVH JDVHV ZLWK FDUERQ GLR[LGH • :HOG TXDOLW\ DQG DSSHDUDQFH 7KH XVH RI
STEEL TECH
