Yuav kom ua tiav cov hom phiaj ntawm lub tsheb qhov hnyav txo, txuag hluav taws xob, tiv thaiv corrosion, tiv thaiv kev ua qias tuaj, tiv thaiv suab nrov, kev nyab xeeb thiab kev nplij siab, thiab lwm yam.txias dov tsheb ntawvnrog cov yam ntxwv sib txawv tau maj mam tsim, ntawm cov uas tseem ceeb suav nrog: sib sib zog nqus kos hlau phaj series tsom rau kev txhim kho formability; High-strength steel phaj series tsom ntawm kev co txo thiab txuag lub zog; nto-kho steel phaj series tsom rau kev txhim kho tsheb los tiv thaiv corrosion; tshwj xeeb steel daim hlau tsom rau kev tsim cov tsheb ua haujlwm siab, thiab lwm yam.
1 Sib sib zog nqus kos hlau phaj
Cov ntawv txias txias tau muab faib raws li qib stamping: qib kev lag luam (CQ), qib zoo tib yam stamping qib (DQ), qib sib sib zog nqus nqus (DDQ), qib sib sib zog nqus ntxiv (EDDQ) thiab qib super sib sib zog nqus (S-EDDQ). Ntawm cov nplooj ntawv rau cov tsheb, kwv yees li 72% ntawm cov ntawv txias txias yuav tsum muaj cov khoom sib sib zog nqus ntawm DQ qib thiab siab dua, thiab ntau dua 95% ntawm cov ntawv galvanized yuav tsum muaj cov duab sib sib zog nqus ntawm DQ qib thiab siab dua.
2 siab zog steel phaj
High-strength automotive sheets tau muab faib ua peb pawg: qib stamping zoo tib yam, qib kos duab sib sib zog nqus thiab qib ultra-dav duab sib sib zog nqus raws li qib stamping. Raws li lub zog mechanism, muaj plaub yam tseem ceeb:
3 Cov kua nplaum muaj zog ntxiv phosphorus-ntxiv steel phaj
Los ntawm kev ntxiv phosphorus, cov ferrite yog cov tshuaj muaj zog ntxiv los txhim kho lub zog. Nws cov qib siab yog 320MPa thiab 360MPa. Phosphorus-ntxiv high-strength steel phaj muaj zoo formability. Cov yas sib piv r tus nqi ntawm qhov sib sib zog nqus-kos qib high-zog steel daim hlau yog 1.4 ~ 1.6, thiab cov yas strain piv r-tus nqi ntawm ultra-dav duab qib high-strength steel daim hlau tuaj yeem ncav cuag 2.0.
4 Dispersion ntxiv dag zog rau lub zog siab qis alloy steel phaj
Los ntawm kev ntxiv Mn, Cu, Mo, V, Ti, Co thiab tsim nyog tswj dov thiab txias txheej txheem, dispersion strengthening, grain refinement thiab rov ua kom muaj zog yog tsim los txhim kho lub zog. Nws cov qib siab yog 380MPa, 420MPa, 460MPa, 500MPa thiab 540MPa. Lub zog tensile ntawm Cu nag lossis daus muaj zog hlau tuaj yeem ncav cuag 610MPa, thiab cov yas sib piv r tus nqi tuaj yeem ncav cuag 1.9. Tom qab ntxiv Mn, lub zog tensile ntawm IF steel ncav cuag 440MPa, thiab cov yas strain ratio r tus nqi yog 1.5 ~ 2.0.
