Shihong ZHANG
,
Zhongtang WANG
,
Bing QIAO
,
Yi XU
,
Tingfeng XU
材料科学技术（英文）
The processing parameters of tube extrusion for superalloy Inconel 718 (IN 718), such as slug temperature, tools temperature, choice of lubricant, extrusion ratio and extrusion speed, were determined by experiment in this paper. An appropriate temperature range recommended for the slug is 1080~1120℃, and the temperature range recommended for the tools is 350~500℃. The microstructural evolution of superalloy IN 718 during tube extrusion was analyzed. With the increase of the deformation the cross crystal grains were slightly refined. While the vertical crystal grain is elongated evidently and the tensile strength increased along the axial rake. Glass lubricants have to be spread on the slug surface after being heated to 150~200℃, vegetable oil or animal oil can be used as the lubricant on the surface of the tools to reduce the extrusion force remarkably.
关键词:
Superalloy IN 718
,
null
,
null
桑胜光
,
车晓盼
,
王嘉黎
,
郭红光
,
井杨坤
,
李泽
,
游伟
液晶与显示
doi:10.3788/YJYXS20163105.0435
现有传统TFT-LCD生产工艺中,Rubbing工艺在生产高PPI ADS产品的过程中,在改善Rubbing Mura不良时会使用H Cloth,但使用H Cloth Glass在经过Rubbing后ODF Rubbing Cleaner清洗时会出现白Mura不良.经过对白Mura不良Panel的微观解析,并结合H Cloth性质分析出白Mura不良是由于H Cloth自身的聚醋酸脂颗粒经过Rub-bing Cleaner聚集造成的.从Rubbing Cleaner清洗时改变Glass表面性质(醇类可以有效改变界面性质)入手,通过使用IPA对Glass进行清洗以改变聚醋酸脂疏水性,使得聚醋酸脂颗粒更易被Rubbing Cleaner清洗掉来改善白Mura不良,并结合生产实际定期对IPA进行更换以保持IPA浓度处于一个稳定的区间,使得高PPI ADS产品白Mura不良发生率由改善前的3.42％降低至改善后的0.11％,白Mura不良得到非常有效的改善.
关键词:
高PPI
,
白Mura不良
,
聚醋酸脂
,
疏水性
