本文關(guān)鍵詞： 中厚板 軋制 軋后冷卻 軟件 數(shù)學(xué)模型 離線模擬　出處：《燕山大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：中厚板是支撐國(guó)家工業(yè)化建設(shè)的重要鋼鐵品種,是促進(jìn)國(guó)民經(jīng)濟(jì)發(fā)展的重要鋼鐵材料,其生產(chǎn)水平和產(chǎn)品質(zhì)量是國(guó)家鋼鐵工業(yè)發(fā)達(dá)程度的重要標(biāo)志。隨著經(jīng)濟(jì)的不斷發(fā)展和市場(chǎng)競(jìng)爭(zhēng)的愈加激烈,用戶對(duì)中厚板產(chǎn)品的質(zhì)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(chǎn)品生產(chǎn)成本、縮短產(chǎn)品開發(fā)周期、提高產(chǎn)品質(zhì)量,為此,本文開發(fā)了中厚板軋制和軋后冷卻過(guò)程的離線模擬軟件。本軟件可以使中厚板廠家反復(fù)進(jìn)行實(shí)驗(yàn)、合理優(yōu)化工藝、拓展產(chǎn)品類型,為高產(chǎn)量、高性能、高質(zhì)量產(chǎn)品的生產(chǎn)和研發(fā)提供科學(xué)的方法和可靠的途徑。本文在離線模擬軟件的開發(fā)過(guò)程中,以中厚板軋制和軋后冷卻的基本理論和工藝過(guò)程為依據(jù),對(duì)軋制過(guò)程中的力能參數(shù)和軋后冷卻的溫降過(guò)程進(jìn)行了分析和研究并建立了相應(yīng)的數(shù)學(xué)模型。其中,軋制力能參數(shù)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(chǔ),軋后冷卻的溫降模型是在傳熱學(xué)的基礎(chǔ)上通過(guò)顯式格式的有限差分法建立起來(lái)的。此外,本文還推導(dǎo)了平均變形速度和變形程度以及物體導(dǎo)熱的微分方程,對(duì)導(dǎo)熱系數(shù)和比熱容進(jìn)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(shè)計(jì)了軋后直接冷卻和分段冷卻兩種冷卻方式,使本文的數(shù)學(xué)模型更加精確、軟件的模擬功能更加豐富。根據(jù)本文建立的軋制和軋后冷卻過(guò)程的數(shù)學(xué)模型,運(yùn)用C++語(yǔ)言編寫了力能參數(shù)模型和溫降模型,完成軟件內(nèi)核運(yùn)算程序的開發(fā);根據(jù)工藝流程順序、數(shù)據(jù)傳輸形式和結(jié)果顯示方法,運(yùn)用VB語(yǔ)言進(jìn)行控件和窗體的設(shè)計(jì),完成軟件人機(jī)交互界面的開發(fā)。通過(guò)運(yùn)行本軟件對(duì)中厚板軋制和軋后冷卻過(guò)程進(jìn)行離線模擬,將軋制力能參數(shù)和軋后冷卻溫降的模擬結(jié)果與現(xiàn)場(chǎng)的實(shí)測(cè)結(jié)果進(jìn)行比對(duì)和分析,驗(yàn)證了本軟件的離線模擬精度能夠滿足實(shí)際生產(chǎn)的需要。基于本軟件對(duì)軋制和軋后冷卻過(guò)程的離線模擬結(jié)果,以軋制過(guò)程中軋制溫度、軋制速度和變形程度對(duì)力能參數(shù)的影響為研究?jī)?nèi)容進(jìn)行分析,得出軋制力能參數(shù)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(guò)程中鋼板厚度、運(yùn)行速度和冷卻水流量對(duì)冷卻效果的影響為研究?jī)?nèi)容進(jìn)行分析,得出軋后終冷溫度隨鋼板厚度和運(yùn)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(xué)位授予單位】：燕山大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TG335.52

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