【铸造流涂料及其基本工艺理论的研究】张启富.pdf
ADissertationSubmittedto HuazhongUniversityof Scienceand Technology for the Degree of Doctor of Philosophy in Engineering Study on Foundry Overpouring Coating and Its Basic Technological Theory Ph.D.Candidate Zhang Qifu Major Foundry Advisor Prof.WangWenqing Ass.Advisor Ass.Prof.
高剪粘度n宜小,流杯粘度Tv=6～10s。该涂料的流型是带有一定 屈服值和触变性的假塑性流体,采用近似叠代法和线性回归分析,得到 了流涂涂料的流变和触变数学模型.对代替锆英粉用于铸钢和铸铁的铝矾土、棕刚玉、石墨、石英粉流 涂涂料的流变特性和触变性也进行了研究,查明了其流型均为带有一 定屈服值和触变性的假塑性流体,只是流变参数有差别.流涂涂料中加入表面活性剂,可明显提高涂料对砂型的润湿和渗 入能力。为使流涂涂料具有较佳的润湿、渗入、涂挂和流平效果,研究表 明:水基锆英粉流涂涂料的表面张力应控制在0～0N/m范围。
oped.Inorder toreduce productioncostsandexpandoverpouringapplication range,differentkindsofcoatingsuchaswater-basedbauxite,browncorundum,graphite,quartz etc.have been researched.Series of non-zircon overpouring coatingforcastingsteelandironwhichpossessexcellentpropertieshavebeen developed.