1.Dab tsi yog qhov kev laus ntawm cov khaub thuas zoo tib yam -rolled coils?
Kev puas tsuaj uas yuav tsum tau zam
Lub sijhawm tshwm sim yog tshwm sim thaum lub sijhawm khaws cia lossis kev thauj mus los ntawm chav tsev kub.
Cov txheej txheem tseem ceeb yog qhov qeeb qeeb ntawm carbon thiab nitrogen atoms ntawm chav tsev kub, pinning dislocations.
Qhov tshwm sim yog tsim los ntawm lub toj siab yield, ua rau tensile strain marks (surface defects) thaum lub sij hawm stamping thiab txo formability.
Kev cuam tshuam tsis zoo ntawm molding: Nws ua rau lub ntsej muag zoo thiab cuam tshuam rau molding stability.
2.Dab tsi yog cov khoom ntawm ci -hardening (BH) steel?
Khoom: Muaj txiaj ntsig, tsim cov yam ntxwv
Ncua thaum lub sij hawm siab -kub ci (170 degree, painting kab).
Cov txheej txheem tseem ceeb: Cov pa roj carbon atom diffuse sai ntawm qhov kub thiab txias, ua rau muaj ntau qhov kev cuam tshuam los ntawm pinning thiab stamping.
Cov txiaj ntsig: Lub zog nce los ntawm 30-80 MPa, txhim kho cov hniav tsis kam ntawm qhov chaw.
Ua kom tsis muaj zog thaum molding (yooj yim pwm), thiab ua tiav lub zog siab (kev ua tau zoo) tom qab molding.
3.Yuav ua li cas khaws "hardener"?
Hauv kev tsim cov hlau BH, los ntawm kev tsim cov tshuaj lom neeg muaj pes tsawg leeg (xws li kev sib ntxiv ntawm cov khoom xws li Nb thiab Ti) thiab cov txheej txheem kho cua sov, ib feem me me ntawm "dawb" carbon atoms yog txhob txwm khaws cia hauv cov hlau microstructure. Cov pa roj carbon atoms yog yaj nyob rau hauv cov hlau lattice, ua "cov noob" rau tom ntej hardening.
4.Yuav ua li cas los tsim "hardened me ntsis" los ntawm stamping?
Nyob rau hauv lub rhiav stamping, cov ntawv hlau yog nias rau hauv qhov nyuaj (xws li lub qhov rooj tsheb). Cov txheej txheem deformation hnyav no ua rau muaj ntau qhov kev cuam tshuam hauv cov hlau. Koj tuaj yeem xav txog qhov tsis sib xws raws li qhov ntom ntom "cov kab tsis xws luag" lossis "scars" hauv cov siv lead ua.
5.Yuav ua li cas ci thiab qhib cov khoom kom tiav cov txheej txheem "pinning hardening"?
Tom qab molding, cov khoom nkag mus rau hauv cov kab kos duab thiab "ci" hauv qhov cub ntawm 170℃rau 20-30 feeb. Qhov kub thiab txias muab lub zog rau qhov tshwj xeeb "dawb" carbon atoms, ua rau lawv nthuav dav sai thiab cia li "khiav" nyob ib ncig ntawm ntau qhov kev cuam tshuam uas tsim los ntawm cov txheej txheem stamping, tsim lub npe hu ua "Cochrie atmospheres," uas khov kho tuav cov dislocations nyob rau hauv qhov chaw xws li rau tes.