摘要
薄板坯连铸连轧被证明是一条能生产低成本,高品质高碳高强钢板的生产线。涟钢已在CSP线上开发了一种低合金高碳高强钢65Mn,所生产的65Mn的碳含量为0.65%,屈服强度为490MPa,抗拉强度为870 MPa,延伸率为18%。所生产的65Mn强度比传统工艺生产的65Mn强度提高了约40%～30%。金相检验其组织为铁素体和珠光体,在薄板试样中发现了纳米级珠光体。与传统生产工艺比较,CSP生产的高碳钢晶粒更细小。其细小的沉淀析出强化物也能在试样中发现。
CSP is proved to be a effective way to produce high carbon high strength steel strip with reduced cost and good quality. A kind of high carbon high strength low alloy steel strip was developed at Lianyuan Steel. The steel 65Mn with the carbon content of 0.65% had yield strength 490 MPa, tensile strength 870 MPa and elongation 18%. The strength of 65Mn produced by CSP was appromximately 40 - 30% larger than that produced by traditional process. Observations of electron microscopy revealed that the microstructures of the strip consisted of fine - grained ferrite and pearlite. Nano sized pearlite lamellar spacing was observed in the steel strip. Compared with the conventional process, the grain size of the steel strip produced by CSP was much smaller. Fine and dispersed precipitations were also observed in the as -rolled specimens.
出处
《金属材料与冶金工程》
CAS
2009年第4期15-17,20,共4页
Metal Materials and Metallurgy Engineering
