卷取温度、冷轧压下量对低碳铝镇静钢SPHC力学性能及成形性的影响  

Effect of Coiling Temperature and Cold Rolling Reduction on Mechanical Properties and Formability of Low Carbon Al Killed Steel SPHC

作　　者：飞尚才 蒋小霞 Fei Shangcai;Jiang Xiaoxia(Qinghai Higher Vocational&Technical Institute,Haidong 810799;Ning Xia University,Yinchuan 750021)

机构地区：[1]青海高等职业技术学院,海东810799 [2]宁夏大学,银川750021

出　　处：《特殊钢》2021年第6期29-31,共3页Special Steel

基　　金：宁夏大学人才引进科研启动基金资助项目(BQD2014021)。

摘　　要：研究了低碳铝镇静钢SPHC(/%:0.04C,0.03Si,0.14Mn,0.027Al)572~648℃卷取温度以及冷轧压下量65%~75%对该钢700℃退火性能的影响。结果表明,在相同的冷轧压下量下,随着卷取温度的增加,强度基本呈现下降趋势,伸长率相对有所上升,n、r值基本呈下降趋势;在相同的卷取温度下,随着冷轧压下量的不断增加,强度呈现下降趋势,伸长率先升后降,n、r值基本呈先升后降的趋势。热轧卷取温度620℃,冷轧变形量70%时,700℃退火3 mm SPHC钢板性能达到最佳,即抗拉强度286 MPa,屈服强度210 MPa,伸长率43%,n值0.27,r值1.52。The effect of coil temperature 572~648℃and cold rolling reduction 65%~75%on properties of the low carbon aluminum killed steel SPHC(/%:0.04C,0.03Si,0.14Mn,0.027Al)annealed property at 700℃has been studied.The results show that at the same cold rolling reduction,with the increase of coiling temperature,the strength of steel basically presents a downward trend,the elongation relatively increases,and the n and r values basically show a downward trend;at the same coiling temperature,with the increase of cold rolling reduction,the strength basically presents a downward trend,the elongation first increases and then decreases,and the n and r values basically show first increases and then decreases downward trend.By comparison,the best performance of 3 mm SPHC steel plate annealed at 700℃can be obtained by hot rolling coiling at 620℃and cold rolling deformation 70%,that is tensile strength 286 MPa,yield strength 210 MPa,elongation 43%,n-value 0.27 and r-value 1.52.

关 键 词：SPHC钢板 卷取温度 压下量 性能 n值 r 值 

分 类 号：TG142.1[一般工业技术—材料科学与工程]