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CO2 1 2 JIS 270MPa 1180MPa 1 2 Nb Ti 3 4 TRIP 5 NbTi C<20ppm IF r IF TS MPa JFS JSC270C JSC270D JSC270E JSC270F 270~ JSC270DG KTUX5 JSC270H JSC340W JSC340H JSC340P JSC370W JSC370P JSC390W JSC390P JSC440W JSC440P CHLY440 JSC590R JSC590Y TRIP JSC780Y JSC980Y JSC1180Y 1 C+B r r3

340~ 370~ 390~ 440~

C+Nb

+M YR +M YR M B

590~ 780~ 980~ 1180~

2 TS MPa JFS JSH270C JSH270D JSH270E 270~ 310~ 370~ 400~ KFN3 JSH310W JSH370W·J JSH400W·J JSH440W·J JSH440R JSH440B SAPH440BH JSH490W JSH490R JSH490B JSH540W JSH540R JSH540Y JSH540B JSH590W JSH590R JSH590Y RHA590DX RHA590FG JSH780W JSH780R JSH780Y RHA780FG RHA780DH

440~

490~

540~

590~

TRIP HSLA

780~

HSLA

3 3 TS MPa JFS JAC270C JAC270D JAC270E JAC270F 270~ JAC270G JAC270H RAKTUX5

C+B r

340~

JAC340W JAC340H JAC340P JAC390W JAC390P JAC440W JAC440W RACHLY440 JAC590R

Nb C BH r2.0

390~

440~

590~ 780~ 270~ 370~ 400~ 440~ 490~

RACHLY590 RAAPFC780 JAH270C JAH270D JAH270E JAH370W·J JAH400W·J JAH440W·J JAH3440Y JAH490Y

+M YR C HSLA +M YR

2

2.1

n r r 4 4 n r

2.2

""""

IF BH IFBHIF "" BH 830 Ac3NbCNb+CNbC CCN rNbC C111NbC CN 340MPaIFBH C Nb/C IF Nb

2.3

PSCSiMn Ceq S IF 5 5

ULC(Ti-Nb-B) ULC(Ti-Nb) ULC(Ti) Low-C

C

0.002 0.003 0.002 0.040

Ti

0.03 0.03 0.06 --

Nb

0.003 0.008 -- --

B

0.0004 -- -- --

YS(MPa)

157 137 127 176

TS(MPa)

314 294 284 304

El(%)

48 51 52 46

r

2.0 1.9 2.1 1.7

Ti-Nb-B 3 Nb-Ti Ti HAZ C M+F HAZ

2.4

PCu 550 SiMn Fe-Zn P Zn

2.5

1 SiMnP SiMnP

2 NbTiV 3 - PRIP 4 6 440MPa 6

270MPa B ULC BH r 340MPa 380MPa 440MPa B ULC BH B ULC B ULC BH() : 147 167 167 230 235 257 200 310 267

YS(MPa) TS(MPa) 284 294 294 371 371 403 420 445 442 El (MPa) 53 48 52 42 42 39 39 37 37 r 2.1 2.0 2.8 2.0 2.0 1.6 1.0 1.5 -1.0 AI (MPa) 40 40 60 60

2% 170°C×20min

3 r

2.4 r Ti-Nb IF {111}r 3.0 {111} r r

3.1

1

7 TS440MPa 1180MPa Si Mn P Ti Nb PRIP 590MPa ×TS El×TS 2 TiC 780MPa 440MPa 590MPa

3.2

TS YS ""

3.3

7 440 JICF JSH440W.J JSH440B JSH440R JSC440W JSC440P JAH440WJ JAH440R SAPH440 SAPH440LC KFR440E SAPH440BH APSC440 CHR440 CHLY440 RASA440 RAAPFH440 CMn CMn CMn CMn + CSiMnP CSiMnP CMn CMn

540

JAC440W JAC440P JSH540W JSH540B JSH540R JSH540Y

RASAP440 RACHRX440 RACHLY440 RHA540 RHA540SK RHA540F RHA540D RHA590 RHA590JK RHA590F RHA590D RHA590DX RHA590SH

CMnP CMnP CMn Ti + TiNb CMn Ti + TiNb + TiNb + TiNb TiNb

590

JSH590W JSH590B JSH590R JSH590Y

JSC590R JSC590Y

APFC590 CHLY590 APFC590DX APFC590DX

780

JAH590R JAC590R

RACHLY590 JSH780R JSH780Y RHA780F RHA780D RHA780HP RHA780SH

Ti Ti +

980

JSC780Y JSC980Y JSC1180Y

CHLY780 CHLY980 CHLY1180

Fixabilities YS TS IF TS 440 MPa TS 590 MPa TS 590 MPa TS 780 MPa 5 0.999 440-1180MPa

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