Processing of Bimetallic Centrifugal Cast Cylinders Using Aluminum Matrix Silicon Carbide Particulate Composite

新的金属基质复合材料如铝基质碳化硅颗粒复合材料的开发已经为耐腐蚀和耐磨应用提供了实质上改进的材料。这在食品和塑料加工行业尤其如此，在这些行业中，耐磨性和耐腐蚀性以及导热性非常重要。目前的行业标准是Chrome镀镍和镍/钴合金不锈钢气瓶。食品和塑料行业迫切需要更好的加工室（圆筒），因为在线加工和更新的高磨损和腐蚀性含氟聚合物的出现。该研究项目的目标是开发一种独特的新型复合材料，用于食品和塑料行业的加工室。与Schevers Laboratories Inc.和威斯康星州双金属公司，制造具有铝基碳化硅颗粒复合物内径的圆柱形腔室所需的工艺参数将被研究。将研究诸如铝复合材料与背衬钢的结合、铸造温度、离心速度、碳化硅润湿、阳极氧化、机加工和珩磨等工艺变量。除了对气缸进行处理外，还需要对材料进行表征，如磨损、腐蚀。研究了复合材料离心铸造后的导热性能、显微组织和颗粒分布。

The development of new metal matrix composite materials such as the aluminum matrix silicon carbide particulate composite, has provided substantially improved materials for corrosion and wear resistant applications. This is especially true in the food and plastic processing industries, where, wear and corrosion resistance and thermal conductivity are important. The present industry standard is chrome plated nickel and nickel/cobalt alloy bimetallic cylinders. The food and plastics industry are in dire need for better processing chambers (cylinders) due to the advent of in-line processing and newer highly abrasive and corrosive fluropolymers. The goal of the research project is to develop a unique new composite material for use as processing chambers in the food and plastics industries. Working in close cooperation between Schevers Laboratories Inc. and Wisconsin Bimetallic Corporation, the processing parameters necessary to manufacture bimetallic cylindrical chambers having an aluminum matrix silicon carbide particulate composite inner diameter will be investigated. Processing variables such as bonding of the aluminum composite to the backing steel, casting temperatures, centrifugal speed, silicon carbide wetting, anodizing, machining and honing will be investigated. Besides processing of the bimetallic cylinders, materials characterization like wear, corrosion. thermal conductivity, microstructure and particle distribution after bimetallic centrifugal casting will be studied.