车轮钢490CL铸坯热塑性研究  

RESEARCH ON THERMOPLASTICITY OF 490CL BILLET OF WHEEL STEEL

作　　者：刘广超 蔺学浩 刘艳红[2] 贾黎杰[2] 于萌 Liu Guangchao;Lin Xuehao;Liu Yanhong;Jia Lijie;Yu Meng(Anyang Iron and Steel Group Co.,Ltd)

机构地区：[1]安阳钢铁集团有限责任公司技术中心 [2]安阳钢铁集团有限责任公司

出　　处：《河南冶金》2022年第3期12-15,共4页Henan Metallurgy

摘　　要：利用Gleeble3800热模拟试验机研究了车轮钢490CL的铸坯高温热塑性,利用扫描电镜观察试样断口形貌,利用光学显微镜观察试样的金相组织。根据断面收缩率的变化,490CL在600~1350℃之间存在两个脆性区和一个高温塑性区,其中1320~1350℃是第Ⅰ脆性区,910~1320℃是高温塑性区,680~910℃是第Ⅲ脆性区。根据断口形貌和金相组织,分析了第Ⅰ脆性区、高温塑性区和第Ⅲ脆性区形成的原因。490CL铸坯热塑性研究为连铸生产工艺的制定提供了理论依据。In this paper, the high temperature thermoplasticity of 490CL billet of wheel steel was studied by Gleeble 3800 thermal simulation test machine. The fracture morphology of the sample was observed by scanning electron microscope and the metallographic structure of the sample was observed by optical microscope. According to the change of area shrinkage, 490CL steel has two brittle zones and one high-temperature plastic zone between 600 ~ 1 350 ℃, of which 1 320 ~ 1 350 ℃ is the first brittle zone, 910 ~ 1 320 ℃ is the high-temperature plastic zone and 680 ~ 910 ℃ is the third brittle zone. According to the fracture morphology and metallographic structure, the causes of the formation of the first brittle zone, high temperature plastic zone and the third brittle zone are analyzed. The study on the thermoplasticity of 490CL slab provides a theoretical basis for the formulation of continuous casting process.

关 键 词：490CL 高温热塑性 断面收缩率 脆性区 

分 类 号：TF777[冶金工程—钢铁冶金]