Sintering temperature effects on the properties of stainless steel 316L compact fabricated by metal injection moulding

Abstract

Stainless steel (SS) 316L powder was prepared with polyethylene glycol (PEG), polymethyl methacrylate (PMMA), and stearic acid (SA) with powder loading 61 vol.%. The sintering parameter in metal injection moulding (MIM) process was manipulated to study its effects on physical, mechanical, and corrosion properties of SS 316L compact. The compacts was fabricated by MIM, and then sintered at 1,100, 1,200, and 1,300°C for 3 h using argon. Then, the compact was tested for density, shrinkage, tensile strength, microstructure, and corrosion behaviours. The compacts sintered at 1,300°C demonstrated highest relative density (94%) and tensile strength (309 MPa), with small porosity was noticed from microstructure. The corrosion potential (Ecorr) and corrosion current (Icorr) values showed higher corrosion resistance which were-3.25E-01 V and 4.93E-0.7 A.cm-2 , respectively. The SS 316L compacts with sintering temperature of 1,300°C for 3h produces excellent physical, mechanical and corrosion properties compared to other temperatures.

Characterization of near-zero pressure powder injection moulding with sacrificial mould by using fingerprint geometries

“…Theoretical density of stainless steel 316L is 7.98 g/cm 3 [17]. It means in freeform injection moulding relative density of 94.1% can be achieved, which is comparable with typical high relative density (94-98%) of stainless steel 316L by conventional powder injection moulding and sintering [18] [19].…”

Penggunaan Material 316l Untuk Green-Part Test Piece Dengan Teknik Metal Injection Molding

“…Pada saat mengeluarkan produk dari mold, ejector stripper dan ejector pin perlu diperhatikan lagi. [22][23][24] Hal lain yang perlu diperhatikan dari mold adalah letak dari produk setelah dipadatkan, penyesuaian tekanan injection dan apakah ada udara yang terperangkap. Pada gatting system yang dirancang, perlu diperhatikan bahwa volume harus optimal, produk tidak rusak saat gate dipotong serta seimbangnya penyebaran aliran produk.…”

“…Pada gatting system yang dirancang, perlu diperhatikan bahwa volume harus optimal, produk tidak rusak saat gate dipotong serta seimbangnya penyebaran aliran produk. [8,24] Saat proses MIM, clamping force harus sedikit lebih besar dari tekanan injection. Suhu material dapat diubah dengan mold heater pada barel.…”

The impacts of post‐processing treatments done under reactive and non‐reactive atmospheres on the densification of binder jetting parts

“…[11][12][13] However, this could lead to corrosion issues through the creation of chromium nitride (CrN). [14] Using Ar [14][15][16] or processing under vacuum [17,18] prevents reactions between the powder and its sintering environment. [19] It is also possible to use a reducing atmosphere to facilitate the reduction/removal of surface oxides through an increase in temperature and decrease in oxygen partial pressure.…”