摘要
Processing technologies for the mass production of aero and industrial gas turbine engine hot-section components made by the investment casting process are discussed. Howmet Corporation is involved in most of these technologies because of the end-user's desire for a finished part. These technologies include pattern-making (using a variety of wax and plastic materials, rapid prototyping, 'hard' tooling, and wax injection machines), silica-zircon and alumina cores that produce internal passages, shells for very large parts and for use with alloys containing reactive elements, Ni, Co, and Ti alloys that are cleaner than ever before,zirconia, silica, and mullite crucibles;computer-controls,robotics,and the manufacture of vacuum casting furnaces; cleaning and finishing equipment designed to quickly process parts with minimal variation,and post-casting operations including hot isostatic pressing (HIP),heat treating,coating,and machining. These technologies will be discussed along with process capabilities required by today's turbine hot-section component suppliers.
Processing technologies for the mass production of aero and industrial gas turbine engine hot-section components made by the investment casting process are discussed. Howmet Corporation is involved in most of these technologies because of the end-user's desire for a finished part. These technologies include pattern-making (using a variety of wax and plastic materials, rapid prototyping, 'hard' tooling, and wax injection machines), silica-zircon and alumina cores that produce internal passages, shells for very large parts and for use with alloys containing reactive elements, Ni, Co, and Ti alloys that are cleaner than ever before,zirconia, silica, and mullite crucibles;computer-controls,robotics,and the manufacture of vacuum casting furnaces; cleaning and finishing equipment designed to quickly process parts with minimal variation,and post-casting operations including hot isostatic pressing (HIP),heat treating,coating,and machining. These technologies will be discussed along with process capabilities required by today's turbine hot-section component suppliers.
