Manufacturing of 316L Stainless Steel Die Mold by Hot Embossing Process for Microfluidic Applications

2013 ◽  
Vol 1 (4) ◽  
Author(s):  
J. Zhang ◽  
J.-C. Gelin ◽  
M. Sahli ◽  
T. Barrière
Keyword(s):  
Stainless Steel ◽  
316L Stainless Steel ◽  
Low Cost ◽  
Hot Embossing ◽  
Solid Loading ◽  
Replication Process ◽  
Hard Materials ◽  
Small Complex ◽  
Replication Technique ◽  
Tolerance Control

Hot embossing process has emerged as a viable method for producing small, complex, precision parts in low volumes. It provides several advantages such as low-cost for molds, high replication accuracy for microfeatures and simple operation. The adaptation of this process for producing high fidelity hot embossed feedstock based metallic powders without the need for machining of the die mold is outlined. This was achieved through a combination of powder metallurgy and plastic hot embossing technologies to produce net-shape metal or hard materials components. In this paper, the manufacturing of molds that are suitable for the production of microfluidic systems using the replication technique is discussed. Variations of parameters in the replication process were investigated. An experimental rheological study was performed to evaluate the influence of the mixing parameters on the rheological behavior and thermal stability of 316L stainless steel feedstock. The effects of the solid loading on the feedstock rheological properties and tolerance control as well as mechanical properties and microstructures were investigated.

Micro-hot-embossing of 316L stainless steel micro-structures

2009 ◽  
Vol 97 (4) ◽  
pp. 925-931 ◽  
Author(s):  
G. Fu ◽  
S. B. Tor ◽  
N. H. Loh ◽  
D. E. Hardt
Keyword(s):  
Stainless Steel ◽  
316L Stainless Steel ◽  
Hot Embossing ◽  
Micro Structures

Experimental Study on Drying Process of Green Body in Gelcasting of Metal Part

2012 ◽  
Vol 217-219 ◽  
pp. 1894-1898
Author(s):  
Hui Huang Liang ◽  
Fei Wang ◽  
Kai Yong Jiang
Keyword(s):  
Stainless Steel ◽  
Freeze Drying ◽  
316L Stainless Steel ◽  
Bending Strength ◽  
Fine Particles ◽  
Solid Loading ◽  
Green Body ◽  
Drying Process ◽  
Metal Part ◽  
Study Results

In this paper, gelatin was selected as binder, sodium alginate as dispersant. The slurries with low viscosity and high solid loading were prepared by mixing two types of 316L stainless steel powders with different particle sizes in proper mass ratios. The freeze drying process was adopted to treat the wet green body. The results show that the slurry with a solid loading as high as 58 vol.% can be obtained by mixing 316L stainless steel powders with mass ratio of fine particles to coarse as 4:6, which has better fluidity and densification. The viscosity of the slurry is less than 1Pa•s. After the freeze drying process, the bending strength of green body reaches 11.15MPa, the drying shrinkage is decreased to 0.44%, and the generation of crack can be prevented. The study results provide some helpful references for further research in rapid manufacturing of complex metal part.

Production of Stainless Steel 316L Foam with Different Solid Loading

2016 ◽  
Vol 840 ◽  
pp. 321-325
Author(s):  
Fazimah Mat Noor ◽  
Khairur Rijal Jamaludin ◽  
Sufizar Ahmad
Keyword(s):  
Stainless Steel ◽  
Low Cost ◽  
Solid Loading ◽  
Vacuum Furnace ◽  
Stainless Steel 316L ◽  
X Ray ◽  
Replication Method ◽  
Elemental Component ◽  
Steel Foam ◽  
Interconnected Pores

Stainless steel foam has been used for various applications due to their advantages over other materials such as high corrosion resistance, easily availability, and low-cost as well as good mechanical properties. In this work, stainless foam was produced by using foam replication method with different solid loading of SS316L i.e 55 wt%, 60 wt%, 65 wt% and 70 wt% SS316L. The samples were sintered in a vacuum furnace at 1250°C. The sample microstructure was characterized by using scanning electron microscope (SEM) while the elemental component was analyzed by using Energy Dispersive X-ray (EDX). The Archimedes test has been conducted to determine the samples density and porosity. It was found that the best sample is SS316L foam with 65 wt% solid loading with the density and porosity of 1.85 g/cm3 and 76.84% respectively which are similar to the human bone. The sample also has open and interconnected pores.

Fabrication of Low-Cost, Cementless Femoral Stem 316L Stainless Steel Using Investment Casting Technique

2014 ◽  
Vol 38 (7) ◽  
pp. 603-608 ◽  
Author(s):  
Mohd Yusof Baharuddin ◽  
Sh-Hussain Salleh ◽  
Andril Arafat Suhasril ◽  
Ahmad Hafiz Zulkifly ◽  
Muhammad Hisyam Lee ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Investment Casting ◽  
316L Stainless Steel ◽  
Low Cost ◽  
Femoral Stem ◽  
Casting Technique ◽  
Cementless Femoral Stem

scholarly journals Design and Implementation of Ultrasonic Impact Peening-Based Device for Stainless Steel Surface Texture Fabrication

Micromachines ◽  
2021 ◽  
Vol 12 (7) ◽  
pp. 787
Author(s):  
Wangjie Hu ◽  
Qiang Zhang ◽  
Xiaohui Wang ◽  
Dongxu Zhao ◽  
Zhenjiang Hu ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Surface Texture ◽  
Steel Surface ◽  
316L Stainless Steel ◽  
Surface Engineering ◽  
Low Cost ◽  
Surface Texturing ◽  
Stainless Steel Surface ◽  
Surface Microstructures

The manufacturing of precise surface microstructures with low cost is needed for surface texturing-based surface engineering. In this paper, a device for the fabrication of surface microgroove texture on stainless steel based on ultrasonic impact peening (UIP) is proposed and investigated. First, the principle of applying the UIP into the fabrication of surface texture is analytically described. Then, the design of the UIP device, particularly the design of functional systems and mechanical structures, is carried out. Next, a UIP experimental device is built, and is further applied to fabricate microgroove textures on 316L stainless steel. The subsequent experimental characterization of microgroove morphology demonstrates the feasibility of the designed UIP device for the fabrication of stainless steel surface texture.

Role of Debinding to Control Mechanical Properties of Powder Injection Molded 316L Stainless Steel

2013 ◽  
Vol 699 ◽  
pp. 875-882 ◽  
Author(s):  
Muhammad Rafi Raza ◽  
Faiz Ahmad ◽  
M.A. Omar ◽  
R.M. German ◽  
Ali S. Muhsan
Keyword(s):  
Mechanical Properties ◽  
Stainless Steel ◽  
Corrosion Resistance ◽  
Injection Molding ◽  
316L Stainless Steel ◽  
Low Cost ◽  
Microstructural Analysis ◽  
Powder Injection ◽  
Laboratory Furnace ◽  
Injection Molded

316L stainless steel is widely used in various industries due to low cost, ease of availability and exceptional combination of mechanical properties along with corrosion resistance as compared to the other available metal alloys. In powder injection molding, debinding is very critical step and improper debinding can change the final properties dramatically. In the present study, affects of debinding on mechanical properties of powder injection molded 316L stainless steel were studied. The prepared feedstocks were molded according to MPIF 50 standard using vertical injection molding machine (KSA100). The plastic binder was removed at 450°C from the molded test samples using two different furnaces i.e. commercial and laboratory furnace followed by the sintering in vacuum, hydrogen, mixture of H2 and N2 (9:1) and nitrogen at 1325°C for 2hr with post sintering cooling rate 3°C/min . Test samples debound in commercially available furnace showed 97% densification and higher mechanical properties. The corrosion resistance was reduced due to presence of residual carbon during thermal debinding. The presence of carbon and formation of carbides and nitrides were confirmed by XRD and microstructural analysis. The results showed that the test samples debound in commercial furnace showed brittle behavior due to the presence of carbides and nitrides. Test samples sintered in N2 showed 96.3% density and tensile strength 751MPa. This value of strength is twice as compared to the sample debound in laboratory furnace followed by the sintering in vacuum. The achieved mechanical properties in vacuum sintered samples were comparable to the wrought 316L stainless steel (according to ASTM standard).

scholarly journals Influence of the Layer Directions on the Properties of 316L Stainless Steel Parts Fabricated through Fused Deposition of Metals

Materials ◽  
2020 ◽  
Vol 13 (11) ◽  
pp. 2493 ◽  
Author(s):  
Takashi Kurose ◽  
Yoshifumi Abe ◽  
Marcelo V. A. Santos ◽  
Yota Kanaya ◽  
Akira Ishigami ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Stainless Steel ◽  
Additive Manufacturing ◽  
316L Stainless Steel ◽  
Low Cost ◽  
The Other ◽  
Processing Conditions ◽  
Direction Parallel ◽  
Tensile Direction ◽  
Fused Deposition

Metal specimens were fabricated via the fused deposition of metals (FDMet) technique with a filament composed of the 316L stainless steel particles and an organic binder. This process was adopted due to its potential as a low-cost additive manufacturing process. The objective of this study is to investigate the influence of the processing conditions—layer directions and layer thicknesses—on the mechanical and shrinkage properties of the metal components. The specimens were printed in three different layer directions. The highest ultimate strength of 453 MPa and strain at break of 48% were obtained in the specimen printed with the layer direction perpendicular to the tensile direction. On the other hand, the specimen printed in the layer direction parallel to the tensile direction exhibited poor mechanical properties. The reason for the anisotropy of the properties was investigated through systematic SEM observations. The observations revealed the presence of segregated binder domains in the filaments. It was deduced that the binder domain was oriented in the direction perpendicular to that of the layer and remained as oriented voids even after sintering. The voids oriented perpendicular to the tensile direction act as defects that could cause stress concentration, thus resulting in poor mechanical properties.

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