STUDY ON JOINING PROCESS FOR LAMINATED OBJECT MANUFACTURING USING METALAS MODELING MATERIALS

摘要

＜正＞ In order to solve some key problems associated with the rapid manufacturing of metallic functional part, a new technique using vacuum solid-state pressure diffusion welding process to join the metallic slice sheets is put forward. The following results can be drawn from the experiments: only 1% shrinkage happened in the stack direction and it came from the regular system error. The atoms diffuse between joint interfaces clearly and new grains formed meanwhile. The average shear strength of welding zone is more than 100 MPa and micro hardness of welding zone is almost the same as that of matrix. It is shown from above results that the vacuum solid-state pressure diffusion welding process is an available technique to join metal slice sheets for the rapid manufacturing of metallic functional parts.