變極性脈沖酸洗電源及交流脈沖酸洗去除氧化皮研究
發(fā)布時間：2018-08-11 17:08
【摘要】：電解酸洗作為一種高效、清潔的鋼材表面氧化皮去除技術(shù),適用于各種形狀及化學(xué)組成的鋼材,能夠徹底去除氧化皮的同時兼具拋光的效果。其中,陰陽極交替電解酸洗綜合了陽極電解酸洗速度較快和陰極電解酸洗效果好的優(yōu)點(diǎn),用交流電或交變脈沖進(jìn)行酸洗,已經(jīng)受到越來越多的關(guān)注。而目前的酸洗電源在輸出模式及控制精度、響應(yīng)速度等方面存在不足,導(dǎo)致對電解酸洗過程及控制方面的研究較為缺乏。因此,研制一種高精度的變極性脈沖酸洗電源及對交流脈沖酸洗工藝及控制方面進(jìn)行研究對提高酸洗效果具有重要意義。本文首先根據(jù)變極性脈沖酸洗電源的總體方案,完成了主電路及控制系統(tǒng)各部分的設(shè)計。經(jīng)安裝調(diào)試,所研制的變極性脈沖電源具有直流、直流脈沖、交流對稱及交流不對稱脈沖四種電流輸出模式,且具有較高的控制精度及較快的響應(yīng)速度,能夠滿足各種電解酸洗工藝需求,較目前的酸洗電源有較大優(yōu)勢。對電解酸洗過程進(jìn)行了研究。搭建電解酸洗實(shí)驗平臺,采用單變量控制方法研究交流對稱脈沖電流波形條件下電流密度和脈沖頻率對實(shí)際酸洗效果的作用規(guī)律,通過對電特性曲線的測試分析和酸洗表面微觀形貌的觀察發(fā)現(xiàn):脈沖頻率一定時,電流密度越大,酸洗效率越高,但電流過大會導(dǎo)致試樣表面出現(xiàn)過腐蝕,不利于形成良好的表面質(zhì)量;電流密度一定時,酸洗過程存在與電流密度相對應(yīng)的最佳脈沖頻率,在最佳頻率條件下可獲得較快的處理速度和較好的表面質(zhì)量。通過多組實(shí)驗,獲得了交流對稱脈沖最佳頻率隨電流密度變化的關(guān)系曲線。對交流脈沖酸洗去除氧化皮的機(jī)理及酸洗過程控制策略進(jìn)行了探索。分析陰陽極電解作用時分別發(fā)生的電化學(xué)反應(yīng)及試樣表面狀態(tài)的變化過程,從理論上解釋了在最佳頻率下可獲得較快處理速度及較好表面處理質(zhì)量的原因。對交流脈沖酸洗控制策略進(jìn)行了研究,提出了實(shí)時控制和改善酸洗過程的思路。
[Abstract]:Electrolytic pickling, as an efficient and clean technology for removing the oxide layer on steel surface, is suitable for steel with various shapes and chemical composition. It can completely remove the oxide layer and also has the effect of polishing. Among them, alternating anode and anode electrolytic pickling has been paid more and more attention by combining the advantages of anode electrolysis pickling speed and cathodic electrolysis pickling effect, which is carried out by alternating current or alternating pulse. However, the current acid pickling power supply is deficient in output mode, control precision, response speed and so on, resulting in a lack of research on the process and control of electrolytic pickling. Therefore, it is of great significance to develop a high precision variable polarity pulse pickling power supply, and to study the AC pulse pickling technology and control in order to improve the pickling effect. Firstly, according to the general scheme of variable polarity pulse pickling power supply, the main circuit and control system are designed. After installation and debugging, the variable polarity pulse power supply has four current output modes: DC, DC, AC symmetry and AC asymmetry, and has higher control precision and faster response speed. Can meet the needs of various electrolytic pickling process, compared with the current pickling power has a greater advantage. The process of electrolytic pickling was studied. The experimental platform of electrolytic pickling was built and the effect of current density and pulse frequency on the actual pickling effect under the condition of AC symmetric pulse current waveform was studied by single variable control method. By testing and analyzing the electric characteristic curve and observing the micro-morphology of pickling surface, it is found that the higher the current density is, the higher the pickling efficiency is when the pulse frequency is fixed, but the higher the current is, the more corrosion occurs on the surface of the sample due to the over-assembly of the current. When the current density is fixed, the optimum pulse frequency corresponding to the current density can be obtained, and the faster treatment speed and better surface quality can be obtained under the optimum frequency. The relationship between the optimum frequency and the current density of a symmetric AC pulse is obtained by multiple experiments. The mechanism and control strategy of AC pulse acid pickling for removing oxidation layer were explored. The electrochemical reaction and the change process of the surface state of the sample under the action of cathode and anode electrolysis are analyzed. The reasons for the faster treatment speed and better surface treatment quality under the optimum frequency are explained theoretically. The control strategy of AC pulse pickling is studied, and the idea of real time control and improvement of pickling process is put forward.
【學(xué)位授予單位】：華南理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TG174.4
本文編號：2177666
[Abstract]:Electrolytic pickling, as an efficient and clean technology for removing the oxide layer on steel surface, is suitable for steel with various shapes and chemical composition. It can completely remove the oxide layer and also has the effect of polishing. Among them, alternating anode and anode electrolytic pickling has been paid more and more attention by combining the advantages of anode electrolysis pickling speed and cathodic electrolysis pickling effect, which is carried out by alternating current or alternating pulse. However, the current acid pickling power supply is deficient in output mode, control precision, response speed and so on, resulting in a lack of research on the process and control of electrolytic pickling. Therefore, it is of great significance to develop a high precision variable polarity pulse pickling power supply, and to study the AC pulse pickling technology and control in order to improve the pickling effect. Firstly, according to the general scheme of variable polarity pulse pickling power supply, the main circuit and control system are designed. After installation and debugging, the variable polarity pulse power supply has four current output modes: DC, DC, AC symmetry and AC asymmetry, and has higher control precision and faster response speed. Can meet the needs of various electrolytic pickling process, compared with the current pickling power has a greater advantage. The process of electrolytic pickling was studied. The experimental platform of electrolytic pickling was built and the effect of current density and pulse frequency on the actual pickling effect under the condition of AC symmetric pulse current waveform was studied by single variable control method. By testing and analyzing the electric characteristic curve and observing the micro-morphology of pickling surface, it is found that the higher the current density is, the higher the pickling efficiency is when the pulse frequency is fixed, but the higher the current is, the more corrosion occurs on the surface of the sample due to the over-assembly of the current. When the current density is fixed, the optimum pulse frequency corresponding to the current density can be obtained, and the faster treatment speed and better surface quality can be obtained under the optimum frequency. The relationship between the optimum frequency and the current density of a symmetric AC pulse is obtained by multiple experiments. The mechanism and control strategy of AC pulse acid pickling for removing oxidation layer were explored. The electrochemical reaction and the change process of the surface state of the sample under the action of cathode and anode electrolysis are analyzed. The reasons for the faster treatment speed and better surface treatment quality under the optimum frequency are explained theoretically. The control strategy of AC pulse pickling is studied, and the idea of real time control and improvement of pickling process is put forward.
【學(xué)位授予單位】：華南理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TG174.4
【參考文獻(xiàn)】
相關(guān)期刊論文 前10條
1 楊凱;曹彪;丁理;楊廣;黃增好;;逆變式高頻窄脈沖微弧氧化電源的設(shè)計[J];華南理工大學(xué)學(xué)報(自然科學(xué)版);2014年09期
2 尹天罡;曹彪;;超聲波金屬焊接信號采集與分析系統(tǒng)[J];電焊機(jī);2013年03期
3 朱亮;蘇婷婷;侯國清;魏鵬;;多道次熱軋過程中奧氏體不銹鋼的氧化皮演變機(jī)制[J];熱加工工藝;2012年21期
4 郝文慧;秦麗雁;劉大烈;;鹽酸濃度對雙相不銹鋼酸洗的影響[J];腐蝕與防護(hù);2012年S2期
5 陳禮斌;高永春;;不銹鋼技術(shù)及其發(fā)展[J];河北冶金;2011年03期
6 周小仨;萬德年;;淺談增量式PID參數(shù)整定[J];信息與電腦(理論版);2010年09期
7 卜福明;葉純杰;潘紅良;;熱軋430不銹鋼表面氧化皮的電解酸洗、混酸酸洗工藝研究[J];材料保護(hù);2010年05期
8 陳偉剛;陳永清;潘紅良;;304不銹鋼Na_2SO_4電解酸洗工藝的研究[J];中國冶金;2009年01期
9 廖建軍;;不銹鋼線材表面處理技術(shù)及應(yīng)用[J];金屬制品;2008年05期
10 覃奇賢;劉淑蘭;;電極的極化和極化曲線(Ⅱ)——極化曲線[J];電鍍與精飾;2008年07期
相關(guān)重要報紙文章 前1條
1 廖建國;;不銹鋼的誕生及其初期發(fā)展[N];世界金屬導(dǎo)報;2011年
，本文編號：2177666
本文鏈接：http://sikaile.net/kejilunwen/jinshugongy/2177666.html
最近更新
教材專著
