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OALib Journal期刊
ISSN: 2333-9721
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弯月面热障涂层方法对结晶器传热及铸坯振痕形貌的影响
DOI: 10.11900/0412.1961.2015.00041, PP. 1145-1152
Keywords: 热障涂层,连铸,弯月面,振痕
Abstract:
提出了一种在结晶器弯月面上方涂敷热障涂层,来抑制弯月面传热,进而控制铸坯振痕形成的新方法,称为弯月面热障涂层方法(TBCMM).利用模拟结晶器弯月面一维传热的测试装置,研究了热障涂层在结晶器弯月面的不同位置对传热的影响规律,分析了热障涂层抑制振痕形成的机理;在浸铸式连铸模拟机上,分别进行了结晶器有、无热障涂层的低熔点Sn-12.5%Pb合金的模拟连铸实验,获得了实测的弯月面温度波动曲线和铸坯,对比分析了弯月面热流和铸坯表面振痕形貌,证实了提出的TBCMM的有效性;最后,在中试实验连铸机上,研究了热障涂层对钢连铸坯表面质量的影响,获得了表面振痕减轻甚至消除的连铸钢坯.
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