Abstract
Indirect Selective Laser Sintering/Isostatic Pressing (SLS/IP), with Cold Isostatic Pressing (CIPing) and Hot Isostatic Pressing (HIPing) IPs, is adopted for the manufacture of complicated automobile components. The preparation of PA12-coated AISI316L powder and airproof plastic canning during CIPing are also investigated. The influence of technology parameters on the performances of AISI316L specimens during SLS/IP is likewise analyzed. Results show that PA12-coated AISI316L powders are successfully prepared through the dissolution and precipitation process, and that it is better to fabricate airproof canning for complicated components with natural latex. After sintering AISI316L specimens from 1300°C to 1340°C (CIPed at more than 300 MPa ahead), their relative densities increased, approaching 92%. Subsequently, their relative densities are improved by HIPing, whose optimal pressure and temperature parameters are between 90 MPa and 20 MPa, and 1150°C and 1250°, respectively. The optimal tensile performances are close to those of annealed AISI316L compact materials.
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