1. Qhov tseem ceeb ntawm qhov muaj zog thiab tawv tawv
Txias dov induceschav- kub ua hauj lwm hardeninglos ntawm cov yas deformation, ua rau grain distortion thiab dislocation tsub zuj zuj nyob rau hauv steel matrix. Qhov no nce lub zog tawm los ntawm 20-30% (rau 415-450 MPa) thiab tensile lub zog los ntawm 15-25% (rau 550-600 MPa); Brinell hardness kuj nce 15-25% (rau 210-270 HBW), txhim kho qhov hnav thiab khawb tsis kam.
2. Kev txo qis hauv Ductility thiab Formability
Kev ua haujlwm-hardened microstructure drastically impairs yas deformation muaj peev xwm: elongation ntawm so poob los ntawm kub- dov ≥20% mus rau ≤15% rau txias -rolled SPA-H. Cov hlau tsis muaj peev xwm ua kom nruj- vojvoog dabtsi yog khoov, sib sib zog nqus stamping thiab complex shaping, tsuas yog haum rau kev ua tiaj tus los yog maj mam, loj - vojvoog dabtsi yog khoov yam tsis muaj cracking.
3. Me ntsis Deterioration ntawm qis-Tsub Toughness
Txias dov muaj kev cuam tshuam me ntsis rau ambient-kub toughness tab sis ua rau me me poob rau hauv qis- kub toughness (sub-zero ib puag ncig). Cov hlau tsis kam rau qis- qhov kub thiab txias cuam tshuam thiab tawg tawg yog txo, txawm hais tias qhov kev hloov pauv no yog qhov tsis txaus ntseeg rau feem ntau cov kev siv sab nraum zoov ntawm qhov txias -rolled SPA-H (1.6–6 mm gauges).
4. Tiam ntawm Internal Residual Stress
Cov yas deformation tsis sib xws thaum lub caij txias dov qhia qhov tseem ceebinternal residual stressnyob rau hauv steel phaj, uas yog daig nyob rau hauv lub matrix tsis high -kub annealing. Qhov kev ntxhov siab no yuav ua rau me ntsis warpage lossis deformation thaum txiav tom qab, vuam lossis kev ua haujlwm thib ob yog tias tsis kho kom zoo los ntawm kev kho qhov kub thiab txias txias.
5. Tsis muaj kev hloov pauv hauv kev qaug zog
Cov txheej txheem txias - dov tsis ua rau muaj kev txhim kho lossis txo qhov qaug zog ntawm SPA-H. Cov hlau tsis kam mus rau cyclic load qaug zog tseem zoo ib yam nrog kub -rolled SPA-H, raws li kev qaug zog yog txiav txim siab los ntawm lub hauv paus alloy muaj pes tsawg leeg es tsis ua haujlwm txias - ntxias lub cev hloov pauv.
