Page 29 - Steel Tech India eMagazine Volume January 2024
P. 29

92/     Ć ,668(   Ć -DQXDU\




































             )LJ     +HDW ÀX[ WUHQGV  OHIW  ZLWK FDVWLQJ VSHHG VXSHULPSRVHG  7KH ULJKW LPDJH VKRZV KHDW ÀX[ UDWLRV


             7R  HQVXUH  D  VPRRWK  FDVWLQJ  RSHUDWLRQ   LW  KDV  EHHQ   DFFRUGLQJO\   HQVXULQJ  WKH  VDIHW\  DQG  HႈFLHQF\  RI  WKH
             REVHUYHG WKDW PDLQWDLQLQJ WKLV UDWLR FORVH WR     LV FUXFLDO   casting process.
             IRU  DFKLHYLQJ  HYHQ  VKHOO  JURZWK  DORQJ  WKH  VWUDQG¶V   Monitoring  the  casting  conditions  can  also  be
             periphery   :KHQ WKH UDWLR IDOOV EHORZ      LW LQGLFDWHV   DFFRPSOLVKHG  WKURXJK  DQ  DQDO\VLV  RI  KHDW  ÀX[
                     > @
             LQVXႈFLHQW KHDW WUDQVIHU IURP WKH QDUURZ IDFHV  ZKLFK   trends.  Ideally,  these  trends  should  exhibit  stability,
             FDQ  UHVXOW  IURP  LVVXHV  OLNH  WKH  EUHDNGRZQ  RI  PROG   FKDUDFWHUL]HG  E\  ÀDW  OLQHV  ZLWK  PLQLPDO  ÀXFWXDWLRQV
             OXEULFDWLRQ RU LQVXႈFLHQW WDSHU  OHDGLQJ WR WKH IRUPDWLRQ   )XUWKHUPRUH  WKH SUR[LPLW\ RI WKH KHDW ÀX[ OLQHV WR HDFK
             RI DQ DLU JDS DV WKH VKHOO FRQWUDFWV  7KLV  LQ WXUQ  OHDGV   RWKHU SURYLGHV YDOXDEOH LQVLJKWV
             WR ORFDOL]HG WKLQQLQJ RI WKH VWHHO VKHOO  3URORQJHG KHDW
             WUDQVIHU EUHDNGRZQ LQ WKLV UHJLRQ FDQ XOWLPDWHO\ OHDG WR   •  Tightly Bunched Lines:  :KHQ  WKH  KHDW  ÀX[  OLQHV
             EUHDNRXWV RQFH WKH WKLQ VKHOO SRUWLRQ H[LWV WKH PROG   are  closely  grouped  together,  it  indicates  a  stable
                                                                   FDVWLQJ FRQGLWLRQ ZLWK FRQVLVWHQW KHDW UHPRYDO UDWHV
             &RQYHUVHO\   LI  WKH  KHDW  ÀX[  UDWLR  LV  H[FHVVLYHO\  KLJK   IURP DOO IDFHV RI WKH PROG
              DERYH       LW VLJQL¿HV WKDW WKH VKHOO LQ WKH QDUURZ IDFH
             UHJLRQ  LV  UHFHLYLQJ  DQ  H[FHVV  RI  KRW  LQFRPLQJ  OLTXLG   •  Wide Spacing Between Lines:  &RQYHUVHO\   LI  WKH
             VWHHO  7KLV KRWWHU VWHHO FDQ FDXVH UHPHOWLQJ RI WKH VKHOO    KHDW ÀX[ OLQHV DUH ZLGHO\ VSDFHG DSDUW  LW VLJQL¿HV DQ
             UHVXOWLQJ LQ WKLQQLQJ RI WKH VROLGL¿HG VKHOO  ZKLFK PD\   XQVWDEOH FDVWLQJ FRQGLWLRQ  RIWHQ FDXVHG E\ ELDVHG
             DOVR OHDG WR EUHDNRXWV  7KHUHIRUH  D GH¿QHG UDQJH KDV   ÀRZ IURP WKH VXEPHUJHG HQWU\ QR]]OH  6(1   7KLV
             EHHQ HVWDEOLVKHG DQG FRORU FRGHG WR JHQHUDWH DODUPV   LPEDODQFH FDQ GLVUXSW WKH HYHQ GLVWULEXWLRQ RI KHDW
                                                                0RUHRYHU   KLJK  OHYHOV  RI  ÀXFWXDWLRQ  LQ  WKH  KHDW  ÀX[
             •  Green Zone (Green Bars):  :KHQ  WKH  KHDW  ÀX[
               UDWLR  IDOOV  ZLWKLQ  WKLV  UDQJH   FDVWLQJ  FRQGLWLRQV  DUH   WUHQGV  FDQ  VLJQDO  SRWHQWLDO  LVVXHV   VXFK  DV  QR]]OH
               considered ideal.                                clogging and unstable casting conditions.
                                                                %\ FRPELQLQJ LQVLJKWV IURP WKH QDWXUH RI WKH KHDW ÀX[
             •  Yellow Zone (Yellow Bars): ,I WKH UDWLR IDOOV LQWR WKLV
               range, caution should be exercised.              WUHQGV DQG WKH KHDW ÀX[ UDWLR  LW EHFRPHV SRVVLEOH WR
                                                                DQWLFLSDWH DEQRUPDO FDVWLQJ FRQGLWLRQV ZHOO LQ DGYDQFH
             •  Red Zone (Red Bars):  When  the  ratio  enters  this   7KLV  HDUO\  GHWHFWLRQ  HQDEOHV  WLPHO\  LQWHUYHQWLRQV  DQG
               UDQJH  LPPHGLDWH FRUUHFWLYH DFWLRQ LV QHFHVVDU\   SUHYHQWLYH PHDVXUHV  VLJQL¿FDQWO\ UHGXFLQJ WKH ULVN RI
             %\ HPSOR\LQJ WKLV FRORU FRGHG V\VWHP  RSHUDWRUV FDQ   EUHDNRXWV DQG HQVXULQJ D VPRRWKHU DQG VDIHU FDVWLQJ
             TXLFNO\  DVVHVV  WKH  FDVWLQJ  Fonditions  and  respond   process.


             STEEL TECH
   24   25   26   27   28   29   30   31   32   33   34