本文關鍵詞： 中厚板 軋制 軋后冷卻 軟件 數學模型 離線模擬　出處：《燕山大學》2015年碩士論文　論文類型：學位論文

【摘要】：中厚板是支撐國家工業(yè)化建設的重要鋼鐵品種,是促進國民經濟發(fā)展的重要鋼鐵材料,其生產水平和產品質量是國家鋼鐵工業(yè)發(fā)達程度的重要標志。隨著經濟的不斷發(fā)展和市場競爭的愈加激烈,用戶對中厚板產品的質量也提出了更高的要求。中厚板廠家只有采用新工藝和新方法,才能最大限度地降低產品生產成本、縮短產品開發(fā)周期、提高產品質量,為此,本文開發(fā)了中厚板軋制和軋后冷卻過程的離線模擬軟件。本軟件可以使中厚板廠家反復進行實驗、合理優(yōu)化工藝、拓展產品類型,為高產量、高性能、高質量產品的生產和研發(fā)提供科學的方法和可靠的途徑。本文在離線模擬軟件的開發(fā)過程中,以中厚板軋制和軋后冷卻的基本理論和工藝過程為依據,對軋制過程中的力能參數和軋后冷卻的溫降過程進行了分析和研究并建立了相應的數學模型。其中,軋制力能參數模型的建立以軋制溫度、變形抗力、平均單位壓力和寬展模型為基礎,軋后冷卻的溫降模型是在傳熱學的基礎上通過顯式格式的有限差分法建立起來的。此外,本文還推導了平均變形速度和變形程度以及物體導熱的微分方程,對導熱系數和比熱容進行了擬合處理,按軋制力和功率兩種模式優(yōu)化了軋制規(guī)程,設計了軋后直接冷卻和分段冷卻兩種冷卻方式,使本文的數學模型更加精確、軟件的模擬功能更加豐富。根據本文建立的軋制和軋后冷卻過程的數學模型,運用C++語言編寫了力能參數模型和溫降模型,完成軟件內核運算程序的開發(fā);根據工藝流程順序、數據傳輸形式和結果顯示方法,運用VB語言進行控件和窗體的設計,完成軟件人機交互界面的開發(fā)。通過運行本軟件對中厚板軋制和軋后冷卻過程進行離線模擬,將軋制力能參數和軋后冷卻溫降的模擬結果與現場的實測結果進行比對和分析,驗證了本軟件的離線模擬精度能夠滿足實際生產的需要�；诒拒浖䦟堉坪蛙埡罄鋮s過程的離線模擬結果,以軋制過程中軋制溫度、軋制速度和變形程度對力能參數的影響為研究內容進行分析,得出軋制力能參數隨軋制溫度的升高而降低,隨軋制速度和變形程度的增加而增大;以軋后冷卻過程中鋼板厚度、運行速度和冷卻水流量對冷卻效果的影響為研究內容進行分析,得出軋后終冷溫度隨鋼板厚度和運行速度的增加而升高,隨冷卻水流量的增加而降低。
[Abstract]:Medium and heavy plate is an important kind of iron and steel to support the industrialization of the country and an important steel material to promote the development of the national economy. The level of production and product quality is an important symbol of the degree of development of the country's iron and steel industry. With the continuous development of the economy and the increasingly fierce competition in the market, Users have also put forward higher requirements for the quality of medium and heavy plate products. Only by adopting new processes and methods can manufacturers of medium and heavy plates minimize production costs, shorten product development cycles, and improve product quality. In this paper, an off-line simulation software for plate rolling and cooling process after rolling is developed. The software can make medium and heavy plate manufacturers to carry out experiments repeatedly, optimize the process reasonably, expand the product types, and make it high yield and high performance. The production and development of high quality products provide a scientific method and a reliable way. In the development of off-line simulation software, the basic theory and process of rolling and cooling after rolling and rolling of medium and thick plate are taken as the basis of this paper. The force and energy parameters in rolling process and the temperature drop process of cooling after rolling are analyzed and studied, and the corresponding mathematical models are established. Based on the average unit pressure and width model, the temperature drop model of post-rolling cooling is established on the basis of heat transfer through the explicit finite difference method. The differential equations of average deformation velocity, deformation degree and heat conduction of objects are also derived. The heat conductivity and specific heat capacity are fitted and the rolling schedule is optimized according to the two modes of rolling force and power. Two cooling methods, direct cooling and piecewise cooling after rolling, are designed, which make the mathematical model of this paper more accurate and the simulation function of software more abundant. According to the mathematical model of rolling and cooling process after rolling, The C language is used to compile the force and energy parameter model and temperature drop model to complete the development of the software kernel operation program, according to the process sequence, the data transmission form and the result display method, the VB language is used to design the control and form. The software man-machine interface is developed. The off-line simulation of rolling and post-rolling cooling process of medium and thick plate is carried out by running the software. The simulation results of rolling force and energy parameters and cooling temperature drop after rolling are compared and analyzed with the measured results in the field. The off-line simulation accuracy of the software is verified to meet the needs of actual production. Based on the off-line simulation results of rolling and post-rolling cooling process, the rolling temperature during rolling process is obtained. The effects of rolling speed and deformation degree on force and energy parameters are analyzed. The results show that the rolling force and energy parameters decrease with the increase of rolling temperature and increase with the increase of rolling speed and deformation degree. The effect of operation speed and cooling water flow rate on cooling effect is analyzed. It is concluded that the final cooling temperature after rolling increases with the increase of steel plate thickness and operation speed, and decreases with the increase of cooling water flow.
【學位授予單位】：燕山大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TG335.52

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