Optimal design of a cold spray nozzle by numerical analysis of particle velocity and experimental validation with 316L stainless steel powder

2007 ◽  
Vol 28 (7) ◽  
pp. 2129-2137 ◽  
Author(s):  
Wen-Ya Li ◽  
Hanlin Liao ◽  
G. Douchy ◽  
C. Coddet
Keyword(s):  
Stainless Steel ◽  
Numerical Analysis ◽  
Optimal Design ◽  
Cold Spray ◽  
Particle Velocity ◽  
Experimental Validation ◽  
316L Stainless Steel ◽  
Steel Powder ◽  
Stainless Steel Powder ◽  
Spray Nozzle

scholarly journals Effects of Admixed Titanium on Densification of 316L Stainless Steel Powder during Sintering

2014 ◽  
Vol 13 ◽  
pp. 04026 ◽  
Author(s):  
Muhammad Aslam ◽  
Faiz Ahmad ◽  
P.S.M BintiMegat Yusoff ◽  
Norhamidi Muhamad ◽  
M.Rafi Raza ◽  
...  
Keyword(s):  
Stainless Steel ◽  
316L Stainless Steel ◽  
Steel Powder ◽  
Stainless Steel Powder

scholarly journals Effect of Si Content on Sintering Behavior of Zr Pre-alloyed 316L Stainless Steel Powder

2011 ◽  
Vol 58 (1) ◽  
pp. 27-32
Author(s):  
Hidefumi Nakamura ◽  
Hisataka Toyoshima ◽  
Hidenori Otsu ◽  
Akihiko Chiba ◽  
Koetsu Abe
Keyword(s):  
Stainless Steel ◽  
316L Stainless Steel ◽  
Steel Powder ◽  
Stainless Steel Powder ◽  
Sintering Behavior ◽  
Si Content

Dry Mixing of Feedstock for injection Moulding of 316L Stainless Steel Powder

2012 ◽  
Author(s):  
Mohd. Afian Omar
Keyword(s):  
Stainless Steel ◽  
Injection Moulding ◽  
316L Stainless Steel ◽  
Steel Powder ◽  
Model Material ◽  
Stainless Steel Powder ◽  
Metal Powders ◽  
Wet Process ◽  
Moulding Machine ◽  
Dry Mixing

Bahan pengikat pengacuan yang terdiri daripada polietilina glikol (PEG) dan polimetil metakrilate (PMMA) telah dihasilkan untuk proses pengacuan suntikan logam. Penyediaan bahan suapan adalah secara kaedah basah di mana PMMA adalah dalam bentuk emulsi dengan saiz serbuk antara 0.1 µm hingga 0.2 µm. Oleh itu, untuk menghindarkan proses pengeringan, satu kaedah baru penyediaan bahan suapan dalam bentuk percampuran kering telah dilakukan. Untuk ini, PMMA yang digunakan adalah terdiri daripada serbuk PMMA komersial berjenama Elvacite yang mempunyai saiz serbuk 100 µm dan juga serbuk PMMA yang didapati daripada proses pengeringan emulsi yang dikisar dan diayak hingga ke saiz serbuk 53 µm. Bahan suapan tersebut telah dicampur ke dalam mesin pencampur bilah sigma selama dua jam pada suhu 120°C. Bahan suapan kemudian disemperit panas sebelum dilakukan proses pengacuan. Keputusan uji kaji menunjukkan dalam semua kes, didapati PMMA telah menyerak secara tidak sekata. Ini seterusnya meningkatkan lagi bahan teracu untuk mengampul semasa proses pengurasan dan menyebabkan bahan tersinter mempunyai banyak keliangan. Walau bagaimanapun, adalah dirumuskan bahawa dengan menggunakan serbuk PMMA yang bersaiz lebih kecil, produk yang lebih baik akan diperolehi. Kata kunci: Percampuran kering, pengacuan suntikan logam, pengsinteran, bahan suapan, serbuk keluli tahan karat 316L An injection moulding binder, which is composed of poly ethylene glycols (PEGs) of various molecular weights and poly methylmethacrylate (PMMA), has been developed for injection of metal powders. Feedstocks have been prepared using a wet process with PMMA introduced in the form of an emulsion with particles of 0.1 to 0.2 µm in size. To eliminate the drying process, an attempt has been made to prepare the feedstock using a dry mixing process using 316L stainless steel powder as a model material. For this, the PMMA used was either a commercial powder, Elvacite, with a particle size of up to 100 m or a powder obtained by drying the emulsion and grinding the resultant cake, followed by classification using 53 µm sieves. The feestock constituents were mixed into a sigma blade mixer for 2 hours at mixing temperature of 120°C. The feedstock was then hot extruded using piston injection moulding machine prior to being moulded. It was found in all cases that PMMA was poorly dispersed. This resulted in an increased tendency for the moulded bars to swell on being leached and the sintered bars to have a substantial residual porosity. This study suggests that by using small particles of PMMA powder, an acceptable product could be obtained. Key words: Dry mixing, metal injection moulding, sintering, feedstock, 316L stainless steel powder

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