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

新型金属基复合材料的发展，如铝基碳化硅颗粒复合材料，为耐腐蚀和耐磨应用提供了显著改进的材料。在食品和塑料加工行业尤其如此，在这些行业，耐磨性、耐腐蚀性和导热性非常重要。目前的行业标准是镀铬镍和镍/钴合金双金属圆筒。食品和塑料行业迫切需要更好的加工室(圆筒)，这是因为在线加工和较新的高研磨性和腐蚀性氟聚合物的出现。该研究项目的目标是开发一种独特的新复合材料，用于食品和塑料行业的加工室。在Schevers实验室公司和威斯康星州双金属公司的密切合作下，将研究制造具有铝基碳化硅颗粒复合内径的双金属圆柱形内腔所需的工艺参数。我们将研究铝基复合材料与衬底钢的粘接、浇注温度、离心速度、碳化硅润湿、阳极氧化、机械加工和珩磨等工艺参数。除加工双金属气缸外，材料的表征如磨损、腐蚀等。研究了双金属离心铸造后的导热系数、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.