Dab tsi 's TRIP Steel?

Advanced siab-lub zog hlau (AHSS) rau daim ntawv thov tsheb nrog suav nrog Theem Theem (DP steel), Complex Theem Steels (CP steel), Hloov Kho Sib Xws (Yas hloov hlau), Martensitic Steels (MS hlau) thiab Quenching thiab muab faib (). Twinning Induced Plasticity Steels (TWIP steel) thiab, Xovxwm Hardening / Boron Steels (PH steel / B steel). TRIP steel tau siv ntau dua thiab ntau dua siv hauv cov ntawv thov kev lag luam vim tias nws qhov txiaj ntsig ntau zog, lub zog tensile thiab kev ua tau zoo stamping. TRIP steel yog ib hom TRansformation Induced Plasticity steel, tau pom thawj zaug thiab muaj npe los ntawm VF Zackay, uas yog siv cov kev tsim cov kev hloov pauv ntawm cov khoom ua ntu thiab hloov ua ntu ntawm cov yas ntawm residual austenite los txhim kho cov yas thiab lub zog ntawm steel phaj thiab txhim kho qhov ua kom zoo ntawm steel phaj. Nws yog tsuas yog siv rau qhov chaw nrog cov qauv sib txawv, xws li B-kem txhav txhav txhav phaj thiab pem hauv ntej longitudinal nqaj ntawm nws pib.

Residual Austenite yog ib qho chaw ruaj khov ntawm austenite kev hloov pauv. Thaum lub lev loj hloov pauv mus ua martensite, seem seem tsuas muaj nyob li austenite vim muaj chaw txwv, uas yog hu ua residual Austenite. Nyob rau hauv cov txheej txheem ntawm deformation ntawm TRIP steel, cov austenite residual yog hloov mus rau qhov muaj zog-cov roj carbon high-carbon Martensite, thiab nrog cov ntim nthuav dav, qhov tsis khov ntawm cov yas deformation yog inhibited, thiab cov ntau ntawm cov teeb tsa ncua ntxiv yog nce, yog li lub zog thiab plasticity. muaj kev txhim kho.

Cov ntsiab lus thiab kev ruaj khov ntawm cov khoom lag luam Austenite yog cov yuam sij ntawm TRIP effect. Cov cua sov tseem ceeb thiab isothermal quenching ntawm qis bainite tau siv los muab kom tau ntau ntawm cov khoom seem Austenite. Qhov ntau ntawm cov plua plav austenite tau los ntawm kev tswj cov ntxuag thiab txias ntawm TRIP steel. Lub microstructure ntawm ob lub TRIP steels zoo sib xws, feem ntau yog 50% - 60% Ferrite, 25% - 40% Bainite, thiab me me ntawm Martensite thiab 5% - 15 % cov khoom seem Austenite (raws li qhia hauv daim duab). Thaum TRIP steel muaj qee qhov nyiaj (GG gt; 8%), piv rau kev ruaj ntseg ntawm khaws cia Austenite, nws los ntawm sab nraud tsim yas deformation, cov seem austenite nce maj, lim tawv, theem hloov thiab hloov mus rau hauv Martensite, ua hauv zos hardness yog khees me ntsis lawm, nws yog qhov nyuaj mus txuas ntxiv deformation, theem hloov tusyees kis mus rau tag nrho cov khoom muaj qhov siab plasticity.

Microstructure of trip steel


Qhov zoo ntawm TRIP steel



1) Muaj lub zog siab thiab ductility, uas yog, muaj cov khoom siv yas muaj zog (Rm × A); Cov khoom lag luam yas muaj zog ntawm TRIP steel feem ntau ntau dua li 20000 MPa ×%.

2) Cov ua haujlwm nyuaj qhov ua tau zoo n tus nqi ntawm TRIP steel yog siab, nrog qhov nruab nrab ntau tshaj 0. 2;

3) Lub dav hlau anisotropy tsawg tsawg, thiab lub pob ntseg me me heev hauv kev sib sib zog nqus;

4) Lwm qhov laj thawj TRIP steel siv nyob rau hauv cov tsheb yog tias nws muaj qhov sib zog loj ua haujlwm thiab qhov cub ci cov nyhuv;

5) TRIP steel' s buckling ratio (Re / Rm) yog kwv yees li 0. 6 ~ 0.

6) Tshaj siab qhov siab txwv qhov siab thiab lub zog tensile, tshwj xeeb tshaj yog haum rau bulging qhov chaw;

7) Lub zog siab dua thaum muaj kev sib tsoo, uas txhim kho kev nyab xeeb. Nrog qhov nce ntawm txoj kev raug mob siab npaum li cas, qhov sib pauv hloov ntawm cov seem austenite mus rau martensite nce, uas ua pov thawj tias TRIP steel yog qhov tsim nyog rau cov khoom siv los tiv thaiv kev cuam tshuam.

8) TRIP steel muaj lub zog nkees muaj zog vim qhov ua haujlwm siab ua haujlwm thiab qhov hnyav ua kom muaj kev cuam tshuam los ntawm cyclic kev nyuaj siab.

Tshuaj lom neeg muaj pes tsawg leeg ntawm TRIP steel



Tam sim no, cov pa roj carbon qes qis thiab qis cov hlau Si-Mn TRIP steel, tseem hu ua C-Si-Mn series TRIP steel, tau ua haujlwm loj. Cov tshuaj lom neeg lub cev tseem ceeb ntawm C-Si-Mn series TRIP steel yog 0. 1% ~ 0. Si, 1. 0% ~ 2. 0% Mn. Feem ntau, cov ntsiab lus xws li Al thiab P tau ntxiv rau txhawm rau txhim kho lub zog.


TRIP tshuaj muaj pes tsawg leeg: Bao steel Q / BQB 312-2009)

C

Si

Mn

P

S

Al

Cu

≤0.3

≤2.2

≤2.5

≤0.090

≤0.015

≥0.010

≤0.20

TRIP Cov khoom muaj nqis

Cov khoom siv

HLUAS 600

HLUAS 800

Cov Qeb Kawm

BR 400 / 590 TR

BR 450 / 780 TR

Lub zog tawv / MPa

705

915.73

Tawm los muaj zog / MPa

500

585.8

Elongation /%

24.0

17.5

Daim ntawv thov ntawm TRIP steel



Tam sim no, TRIP steel yog dav siv nyob rau hauv kev tsim tsheb hauv kev lag luam.Qhov kom txo qis tsheb, txo kev siv roj thiab txo qhov muaj kuab paug ib puag ncig, nws yog qhov tsim nyog los txo cov tuab ntawm tsheb phaj yam tsis muaj kev nyab xeeb kev ua haujlwm. TRIP steel yog cov tshuaj zoo rau kev sib tw ntawm kev muaj zog siab ntawm lub tsheb daim hlau. Tib lub sijhawm, TRIP steel tseem muaj lub zog ruaj khov kev nqus tau thiab muaj peev xwm tiv taus cov yas deformation thaum muaj kev cuam tshuam, uas txhim kho qib kev nyab xeeb ntawm cov tsheb.

Ntxiv rau, TRIP steel kuj tseem siv tau rau hauv cov thee pob zeb ntsia liaj qhov rooj, kev tsim kho hauv pej xeem, cov raj xa dej thiab cov nkoj sab. Ntsia liaj qhov rooj nyob rau hauv cov pob zeb hauv av txoj kev xav tau cov khoom siv lub cev lub cev kom muaj lub zog loj thiab cov kabmob siab muaj peev xwm tswj tau qhov deformation ntawm pob zeb puag ncig ntawm txoj kev tsheb. Nyob rau tib lub sijhawm, nws tseem yuav tsum tau muaj qee qib siab ntawm cov yas ua kom tso cai rau ib puag ncig pob zeb los ua kom muaj kev ntxhov siab thiab rov ua rau muaj kev ntxhov siab, uas yog, txhawm rau hloov kho kom deformation ntawm cov pob zeb ib puag ncig. Tshwj xeeb tshaj yog nyob rau hauv cov xwm txheej ntawm mos, tawg thiab nthuav dav puag ncig pob zeb thiab tsuas, cov pob zeb puag ncig ntawm txoj kev tsheb tsis tshua muaj zog thiab loj deformation. Lub hnab yas ntawm bolt lub cev tseem ceeb dua.


TRIP steel feem ntau tsis meej pem nrog TWIP steel, yog li koj yuav tsum paub qhov txawv ntawm TRIP thiab TWIP cov cuam tshuam. Cias muab, qhov ua tau zoo ntawm TWIP muaj zog dua li qhov TRIP nyhuv hais txog kev txhim kho lub zog thiab elongation. Qhov kev cuam tshuam los ntawm TRIP yog vim qhov kev hloov ntawm Martensite los ntawm Metastable FCC - Austenite mus rau qhov khoom - nruab nrab cubic (BCC), thaum TWIP cov txiaj ntsig ua raws li kev hloov kho cov menyuam ntxaib, ua rau qis tus nqi ntawm kev ua haujlwm nyuaj thiab ntau dua elongation thaum so. Lub TWIP nyhuv tuaj yeem pom qhov ua tau zoo ntawm cov cuab yeej txhawb zog-pom cov tsiaj, zoo li cov ntxaib ntsej muag ua lub zog ua kom muaj zog tiv thaiv plam. Yog xav paub ntxiv txog TRIP steel, thov hu rau peb tam sim ntawd.