分层实体制造中金属分层板结合的新方法

针对金属造型材料分层快速制造方法中存在的问题，提出用真空固态压力热扩散焊接金属分层板的新方法。实验研究表明：焊接后堆积成形方向上零件尺寸变化较小，且为系统误差，其数值仅为1%；结合区域原子发生了明显扩散，新的晶料组织已经形成；焊缝结合强度在100Mpa以上，显微硬度与母材一致。研究结果表明真空固态压力热扩散焊是比较理想的金属分层板连接工艺。

Connect Technique of Laminated Object Manufacturing Using Metallic Materials as Modeling Materials

To solve some key problems existed in the manufacturing of metallic functional part via Laminated Object Manufacturing (LOM), a new technique using vacuum solid-state pressure diffusion weld technique to connect the metallic slice sheets is presented in this paper. The following conclusions can be draw from the experiments introduced specially: the size in the stack direction shrink at the rate of less than 1% and the shrinking is owed to regularly error, the atom-diffusion between two combined interface occurred clearly and new crystallites shaped meanwhile, shearing intension of well connected diffusion section is more than 100 MPa and micro hardness of well-knit portion is the same to matrix's. It can be proved from the result above that the vacuum solid-state pressure diffusion technique weld is a perfect technique for connecting metallic slice sheets used in the manufacturing of metallic functional part via LOM.