ASTM B883-2017 金属注射成形（MIM）铁基材料规格 Standard Specification for Metal Injection Molded (MIM) Materials

1.1 This specification covers ferrous metal injection molded materials fabricated by mixing elemental or pre-alloyed metal powders with binders, injecting into a mold, debinding, and sintering, with or without subsequent heat treatment. 1.2 This specification covers the following injection molded materials. 1.2.1 Compositions:  1.2.1.1 MIM-2200, low-alloy steel 1.2.1.2 MIM-2700, low-alloy steel 1.2.1.3 MIM-4605, low-alloy steel 1.2.1.4 MIM-4140, low-alloy steel 1.2.1.5 MIM-316L, austenitic stainless steel 1.2.1.6 MIM-17-4 PH, precipitation hardening stainless steel 1.2.1.7 MIM-420, martensitic stainless steel 1.2.1.8 MIM-430L, ferritic stainless steel 1.2.1.9 MIM-440, martensitic stainless steel 1.2.1.10 MIM-Cu, copper 1.3 Chemical composition limits are specified in Table 1. TABLE 1 Chemical Composition Requirements For Metal Injection Molded Materials (weight %) Material Designation   Fe Ni Cr Co Mo C Cu Si Mn Nb + Ta V Other MIM-2200 Min. Bal. 1.5 - - - - - - - - - -   Max. Bal. 2.5 - - 0.5 0.1 - 1.0 - - - 1.0                             MIM-2700 Min. Bal. 6.5 - - - - - - - - - -   Max. Bal. 8.5 - - 0.5 0.1 - 1.0 - - - 1.0                             MIM-4605 Min. Bal. 1.5 - - 0.2 0.4 - - - - - -   Max. Bal. 2.5 - - 0.5 0.6 - 1.0 - - - 1.0                             MIM-4140 Min. Bal. - 0.8 - 0.2 0.3 - - - - - -   Max. Bal. - 1.2 - 0.3 0.5 - 0.6 1.0 - -