山东冶金
山東冶金
산동야금
SHANDONG METALLURY
2015年
3期
28-31
,共4页
SPCC带钢%冲压性能%冷轧压下率%金相分析
SPCC帶鋼%遲壓性能%冷軋壓下率%金相分析
SPCC대강%충압성능%랭알압하솔%금상분석
SPCC steel%stamping performance%cold rolling degree of reduction%metallographic examination
对不同退火温度下SPCC带钢试样的金相分析表明,SPCC钢在600℃退火时已经发生再结晶,680~720℃,晶粒均匀且存在一定数量的饼形晶粒,超过720℃时,晶粒长大;冷轧板压下率分别为73.85%及70%时,也表现为晶粒均匀的组织;对应的综合力学性能最好.通过优化冷轧总压下率为70%~78%,优化罩式退火工艺参数,衡量SPCC退火卷冲压性能的屈强强度、抗拉强度、伸长率、n值、r值、IE值等指标明显提高,工艺稳定性增强,因性能导致的不合格率降低了2.68%,年减少质量异议损失12.5万元.
對不同退火溫度下SPCC帶鋼試樣的金相分析錶明,SPCC鋼在600℃退火時已經髮生再結晶,680~720℃,晶粒均勻且存在一定數量的餅形晶粒,超過720℃時,晶粒長大;冷軋闆壓下率分彆為73.85%及70%時,也錶現為晶粒均勻的組織;對應的綜閤力學性能最好.通過優化冷軋總壓下率為70%~78%,優化罩式退火工藝參數,衡量SPCC退火捲遲壓性能的屈彊彊度、抗拉彊度、伸長率、n值、r值、IE值等指標明顯提高,工藝穩定性增彊,因性能導緻的不閤格率降低瞭2.68%,年減少質量異議損失12.5萬元.
대불동퇴화온도하SPCC대강시양적금상분석표명,SPCC강재600℃퇴화시이경발생재결정,680~720℃,정립균균차존재일정수량적병형정립,초과720℃시,정립장대;랭알판압하솔분별위73.85%급70%시,야표현위정립균균적조직;대응적종합역학성능최호.통과우화랭알총압하솔위70%~78%,우화조식퇴화공예삼수,형량SPCC퇴화권충압성능적굴강강도、항랍강도、신장솔、n치、r치、IE치등지표명현제고,공예은정성증강,인성능도치적불합격솔강저료2.68%,년감소질량이의손실12.5만원.
The analysis to the different annealing temperature under SPCC strip of metallographic showed that SPCC steel in the annealed at 600℃ has occurred recrystallization, in 680-720℃, the grain is uniform, and there are a certain number of pancake grains, higher than 720℃, grain start growing. Cold rolled plate pressure ratio respectively 73.85% and 70%, the grain is uniform, the corresponding comprehensive mechanical properties can be got the best. Through optimizing cold rolling total percent reduction rate to 70%-78% and optimal annealing process parameters, stamping property indexes such as yield strength, tensile strength, elongation at break, n value, r value and IE value were significantly increased, and the process stability improved. The unqualified ratio due to the properties was reduced by 2.68%, and the loss due to quality objection was decreased by 125 000 Yuan per year.
