Page 31 - Steel Tech India eMagazine Volume October 2023
P. 31
92/ Ć ,668( Ć 2FWREHU
• &ROG ZRUN &ROG ZRUNLQJ SURFHVVHV VXFK DV UROOLQJ +DUGQHVV WHVWLQJ
and drawing, can introduce residual stresses into 3ULQFLSOH +DUGQHVV WHVWLQJ PHDVXUHV WKH PDWHULDO¶V
WKH VWHHO DႇHFWLQJ LWV WRXJKQHVV 3URSHU VWUHVV resistance to indentation or penetration.
UHOLHI WHFKQLTXHV FDQ EH HPSOR\HG WR PLWLJDWH WKHVH
issues. 3URFHGXUH 9DULRXV KDUGQHVV WHVWLQJ PHWKRGV VXFK DV
%ULQHOO 5RFNZHOO DQG 9LFNHUV DUH HPSOR\HG WR DVVHVV
0HWKRGV IRU WHVWLQJ ZHOG TXDOLW\ WKH KDUGQHVV RI (5: WXEH DQG SLSH PDWHULDOV ,Q WKH
7KHUH DUH YDULRXV PHWKRGV RI WHVWLQJ LQ WXEHV DQG SLSHV Brinell test, a hardened steel ball or carbide indenter
EURDGO\ WKH PHWKRG RI WHVWLQJ LV FODVVL¿HG LQ WHUPV RI LV SUHVVHG LQWR WKH PDWHULDO¶V VXUIDFH 7KH VL]H RI WKH
GHVWUXFWLYH DQG QRQ GHVWUXFWLYH WHVWLQJ UHVXOWLQJ LQGHQWDWLRQ LV PHDVXUHG WR GHWHUPLQH WKH
%ULQHOO KDUGQHVV QXPEHU 5RFNZHOO KDUGQHVV WHVWLQJ
'HVWUXFWLYH WHVWLQJ
LQYROYHV XVLQJ D FRQH VKDSHG RU VSKHULFDO LQGHQWHU WR
Destructive testing involves subjecting the test PHDVXUH WKH PDWHULDO¶V KDUGQHVV EDVHG RQ WKH GHSWK
VSHFLPHQV WR FRQWURO VWUHVVHV RU FRQGLWLRQ WR DVVHVV RI SHQHWUDWLRQ 9LFNHUV KDUGQHVV WHVWLQJ HPSOR\V D
WKHLU SURSHUWLHV RIWHQ OHDGLQJ WR VSHFLPHQ IDLOXUH '7 LV VTXDUH EDVHG GLDPRQG S\UDPLG LQGHQWHU WR DVVHVV
W\SLFDOO\ SHUIRUPHG RQ D VXEVHW RI VDPSOHV WR YDOLGDWH KDUGQHVV EDVHG RQ WKH GLDJRQDO OHQJWK RI WKH UHVXOWLQJ
WKH TXDOLW\ RI HQWLUH SURGXFWLRQ EDWFK LPSUHVVLRQ
7HQVLOH WHVWLQJ
$SSOLFDWLRQ +DUGQHVV WHVWLQJ SURYLGHV LQVLJKW LQWR WKH
3ULQFLSOH 7HQVLOH WHVWLQJ HYDOXDWHV WKH PHFKDQLFDO PDWHULDO¶V UHVLVWDQFH WR GHIRUPDWLRQ DQG ZHDU ,W KHOSV
SURSHUWLHV RI (5: WXEHV DQG SLSHV E\ DSSO\LQJ D[LDO HQVXUH WKDW (5: WXEHV DQG SLSHV PHHW KDUGQHVV
WHQVLOH IRUFHV XQWLO WKH VSHFLPHQ IUDFWXUHV VSHFL¿FDWLRQV DQG DUH VXLWDEOH IRU WKHLU LQWHQGHG
3URFHGXUH $ VSHFLPHQ LV VXEMHFWHG WR LQFUHDVLQJ applications.
WHQVLOH ORDGV XQWLO LW IDLOV 7KH UHVXOWLQJ VWUHVV VWUDLQ
FXUYH SURYLGHV LQIRUPDWLRQ DERXW WHQVLOH VWUHQJWK \LHOG
strength, and elongation.
$SSOLFDWLRQ 7HQVLOH WHVWLQJ DVVHVVHV WKH PDWHULDO¶V
PHFKDQLFDO SURSHUWLHV HQVXULQJ WKDW (5: WXEHV DQG
SLSHV PHHW VSHFL¿HG VWUHQJWK DQG GXFWLOLW\ UHTXLUHPHQWV
)LJ +DUGQHVV WHVWLQJ RI WXEHV
%HQG 7HVWLQJ
3ULQFLSOH Bend testing assesses the ductility and
VRXQGQHVV RI (5: ZHOGV E\ VXEMHFWLQJ WKHP WR
FRQWUROOHG EHQGLQJ IRUFHV
3URFHGXUH $ VHFWLRQ RI WKH (5: WXEH RU SLSH LV EHQW
WR D VSHFL¿HG DQJOH W\SLFDOO\ GHJUHHV 7KH WHVW
)LJ 7HQVLOH WHVWLQJ RI WXEHV
STEEL TECH