1.Dab tsi yog peb qhov teeb meem uas koj yuav tsum paub txog?
Chav tsev yog MPa, tsis yog kgf / mm². Cov duab qub feem ntau siv "35 kgf/mm²", qhov twg 1 kgf/mm² ≈ 9.8 MPa. 35 kgf ≈ 343 MPa. Tsis meej pem cov chav no yuav ua rau xaiv cov khoom tsis raug.
Transverse vs. Longitudinal Strength: Lub zog longitudinal ntawm txias -rolled coils feem ntau qis dua lub zog transverse.
Sib sib zog nqus- kos qhov chaw (kos duab): Saib cov kev taw qhia hla; transverse zog txiav txim seb nws puas yuav tawg.
Rolled qhov chaw (yob txoj kev): Saib ntawm qhov kev taw qhia longitudinal.
Yog hais tias daim ntawv pov thawj warranty tsis qhia txog cov kev taw qhia, nws ua rau longitudinal; tsis txhob liam lub zeb zeb yog tias nws tawg thaum lub sij hawm stamping.
Kev kam rau siab: Lub teb chaws tus qauv tso cai rau qhov sib txawv ntawm ± (20 ~ 30) MPa. Kev yuav DC03 (tsawg dua lossis sib npaug li 240 MPa), nrog rau qhov ntsuas qhov tseeb ntawm 265 MPa, yog ua raws tab sis tsis tas yuav siv tau - nws yuav twv yuav raug kaw thaum stamping txoj kev sib sib zog nqus - kos qhov chaw.
2.Yuav ua li cas kuaj txoj kev khoov nrog ib txhais tes?
<180MPa (Extremely Soft): Bending 90° by hand, it has no springback, like lead.
180 ~ 240MPa (Soft): Khoov 90 degree, nws rov qab 10 ~ 20℃thaum tso tawm.
240 ~ 300MPa (Semi-Hard): Yuav tsum muaj zog, rov qab los ntawm lub kaum sab xis loj, thiab ua rau tes qaug zog.
>300MPa (Nruab): Yooj yim heev rau khoov ntawm tes, thiab pib ncaj nraim rov qab thaum tso tawm.
3.Yuav ua li cas pinching ntug ntawm tus ntsia thawv?
Sim pinching qhov chaw txiav (burr ntug) ntawm steel sawb nrog koj cov ntiv tes.
Cov khoom siv mos: Koj cov ntiv tes tuaj yeem tawm hauv qhov chaw ntiav, lossis txawm tias curl tawm ntawm cov hlau shavings.
Cov khoom siv tawv: Koj cov ntiv tes yuav plam, tsis muaj qhov cim.
4.Dab tsi yog qhov cuam tshuam ntawm kev tawm dag zog ntau dhau?
Tsis txaus annealing: Lub tswb - hom rauv tsis ua kom sov, ua rau cov tub ntxhais kub tsis txaus.
→ Cov tsos mob: mos ntawm qhov pib thiab qhov kawg, nyuaj hauv nruab nrab; los yog mos ntawm cov npoo, tawv hauv cov tub ntxhais.
Ntau dhau elongation thaum lub sij hawm leveling: Lub tshuab leveling siv ntau lub zog, ua rau ua hauj lwm hardening.
→ Cov tsos mob: Lub elongation yog uniformly siab thoob plaws hauv lub kauj, nrog ib tug me ntsis ntxhib nto.
Cov khoom sib xyaw: Tsawg- carbon steel tau tov nrog siab - lub zog steel.
→ Cov tsos mob: Sudden hloov nyob rau hauv hardness, nrog ib tug sib txawv ntawm ntau tshaj 50 MPa nyob rau hauv tib lub kauj.
5.Dab tsi yog qhov cuam tshuam ntawm qhov muaj zog tawm los tsawg dhau?
Tshaj -annealing: kub dhau los yog lub sijhawm tuav ntev dhau los ua rau cov nplej ntxhib.
→ Cov tsos mob: Darkened nto, txawm txiv kab ntxwv tev zoo nkauj.
Unevenness: Tsis txaus leveling tshuab lossis elongation tsawg dhau.
→ Cov tsos mob: Loose winding, warped daim ntawv zoo, yield plateau (Lüders band) thaum stretching.