(1. 東北大學(xué) 材料與冶金學(xué)院，沈陽(yáng) 110004;
2. 上海寶鋼集團(tuán) 梅山鋼鐵股份有限公司，南京 210039)
摘 要: 利用結(jié)晶器傳熱模型、熱/應(yīng)力模型和現(xiàn)場(chǎng)數(shù)據(jù)，建立了結(jié)晶器內(nèi)液體摩擦力計(jì)算模型，利用該模型分析了某鋼廠2.0 m/min拉速下結(jié)晶器非正弦振動(dòng)振幅對(duì)液體摩擦力的影響，給出了振幅選取原則和確定方法。結(jié)果表明：拉速一定時(shí)采用小振幅振動(dòng)可限制最大液體摩擦力，增大保護(hù)渣耗，減小負(fù)滑脫時(shí)間，隨拉速提高應(yīng)適當(dāng)增大振幅，以改善振動(dòng)效果；結(jié)合現(xiàn)場(chǎng)工藝，確定拉速2.0 m/min時(shí)的適宜振幅為±4 mm，拉速升至2.2 m/min，振幅相應(yīng)增至±4.5 mm；保護(hù)渣膜厚度計(jì)算結(jié)果符合生產(chǎn)實(shí)際，為研究結(jié)晶器內(nèi)潤(rùn)滑機(jī)理提供了條件。
關(guān)鍵字: 連鑄結(jié)晶器；非正弦振動(dòng)；振幅；液體摩擦力；保護(hù)渣膜；潤(rùn)滑
continuous casting mold with high casting speed
CHENG Nai-liang2, JIANG Zhong-kuai2
（1. School of Materials and Metallurgy, Northeastern University,Shenyang 110004, China;
2. Meishan Iron and Steel Co. Ltd., Shanghai Baosteel Co.,Nanjing 210039, China）
Abstract:A mathematical model to the represent liquid flux friction in mold was established by heat-transfer model, heat-stress model and actual data. The effect of non-sinusoidal oscillation amplitude on liquid friction force was analyzed at casting speed of 2.0 m/min, the selection principle and determination method of amplitude were also introduced. The results show that the small amplitude application at certain casting speed can restrict the maximal liquid friction force, increase the flux consumption and decrease the negative strip time. The amplitude should be suitably increased with casting speed to improve the ameliorate oscillation effect. Combined with the casting production, the optimum amplitudes casting speed of 2.0 m/min and 2.2 m/min are obtained as ±4 mm and ±4.5 mm, respectively. The flux film thickness that accords with the practical condition commendably provides guidance to study the mold lubrication mechanism.
Key words: continuous casting mold; non-sinusoidal oscillation; amplitude; liquid friction force; flux film; lubrication
