Sintering study of 316L stainless steel metal injection molding parts using Taguchi method: final density

2001 ◽  
Vol 311 (1-2) ◽  
pp. 74-82 ◽  
Author(s):  
C.H. Ji ◽  
N.H. Loh ◽  
K.A. Khor ◽  
S.B. Tor
Keyword(s):  
Stainless Steel ◽  
Injection Molding ◽  
Taguchi Method ◽  
316L Stainless Steel ◽  
Metal Injection Molding ◽  
Final Density

The Characterization and Flow Behavior of 316L Stainless Steel Feedstock for Micro Metal Injection Molding (μMIM)

2010 ◽  
Vol 44-47 ◽  
pp. 2872-2876
Author(s):  
Pei Li Haw ◽  
Norhamidi Muhamad ◽  
Hadi Murthadha
Keyword(s):  
Stainless Steel ◽  
Injection Molding ◽  
316L Stainless Steel ◽  
Flow Behavior ◽  
Palm Stearin ◽  
Metal Injection Molding ◽  
Injection Molding Process ◽  
Binder System ◽  
Molding Process ◽  
Rheological Characterization

The rheological behaviors of the Micro Metal Injection Molding feedstock are important for the stability of the feedstock during micro injection molding process and quality of the final micro-components. Homogeneous feedstocks are preferable for MIM process to ensure the dimensional consistency of molded components and prevent the defects of powder-binder separation or particle segregation. In this work, feedstocks with various formulations of 316L stainless steel and binder system were prepared by using Brabender Plastograph EC Plus mixer. The binder system comprises of palm stearin, polyethelene (PE) and stearic acid. In order to obtain the viscosity, activation energy, flow behavior and mold ability index, the rheological characterization of the feedstocks were investigated in numerous conditions by using Shimadzu 500-D capillary rheometer The study showed that all of the 316L stainless steel feedstocks are homogenous with pseudo-plastic behaviors.

Simulation and Modeling of Sintering Process for 316L Stainless Steel Metal Injection Molding Parts

2015 ◽  
Vol 651-653 ◽  
pp. 32-37
Author(s):  
Mohamed Sahli ◽  
Jean Claude Gelin ◽  
Thierry Barrière
Keyword(s):  
Experimental Data ◽  
Stainless Steel ◽  
Injection Molding ◽  
316L Stainless Steel ◽  
Structural Evolution ◽  
Metal Injection Molding ◽  
Sintering Process ◽  
Polymer Injection ◽  
Finite Element Software ◽  
Large Material

The metal injection molding (MIM) process allows the manufacturing of small and very complex metallic components. The metal injection molding processing combines the shaping capability of polymer injection molding with the large material variety of metals and ceramics. This paper discusses in detail the development of a numerical model capable of simulating micro-structural evolution and macroscopic deformation during sintering of complex powder compacts. A sintering model based on elastic–viscoplastic constitutive equations was proposed and the corresponding parameters such as bulk viscosity, shearing viscosity and sintering stress were identified from dilatometer experimental data. The constitutive model was then implemented into finite element software in order to perform the simulation of the sintering process. The numerical simulation methods being compared against results of the sintering experiments. The experimental data were obtained from sintering of 316L stainless steel powders.

scholarly journals Green density optimization of stainless steel powder via metal injection molding by Taguchi method

2017 ◽  
Vol 135 ◽  
pp. 00038 ◽  
Author(s):  
AM Amin ◽  
MHI Ibrahim ◽  
MY Hashim ◽  
OMF Marwah ◽  
MH Othman ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Injection Molding ◽  
Taguchi Method ◽  
Steel Powder ◽  
Stainless Steel Powder ◽  
Metal Injection Molding ◽  
Green Density

Tribological Properties of 316L Stainless Steel Fabricated via Metal Injection Molding

2014 ◽  
Vol 879 ◽  
pp. 134-138 ◽  
Author(s):  
Nurazilah Mohd Zainon ◽  
Noorsyakirah Abdullah ◽  
Norazlan Roslani ◽  
Mohd Afian Omar
Keyword(s):  
Stainless Steel ◽  
Injection Molding ◽  
Tribological Properties ◽  
316L Stainless Steel ◽  
Chromium Steel ◽  
Metal Injection Molding ◽  
Dog Bone ◽  
Injection Molded ◽  
Pin On Disk ◽  
Sliding Distance

The tribological properties of sintered 316L stainless steel fabricated via injection molding were investigated. Tests were carried out at room temperature comparing metal injection molded dog bone tensile samples at different sintering temperatures. The parameter used for the pin on disk test is a 10kN load, 500m sliding distance and a chromium steel ball as a sliding partner. The morphologies and compositions of the worn surfaces were analyzed by SEM, Raman and XPS. The results showed that the wear mechanism and friction coefficient of SS316L depended strongly on the microstructure which was influenced by the sintering temperature.

Investigations on Metal Injection Molding of 316L Stainless Steel

1995 ◽  
Vol 10 (3) ◽  
pp. 425-438 ◽  
Author(s):  
G. Veltl ◽  
Th. Hartwig ◽  
F. Petzoldt ◽  
H.-D. Kunze
Keyword(s):  
Stainless Steel ◽  
Injection Molding ◽  
316L Stainless Steel ◽  
Metal Injection Molding

Preparing MIM Feedstocks for Bio-Applications Using an Agar-Based Binder

2008 ◽  
Vol 587-588 ◽  
pp. 385-389 ◽  
Author(s):  
Fatima M. Barreiros ◽  
A.G. Martins ◽  
Mariana Matos ◽  
João M.G. Mascarenhas ◽  
M. Teresa Vieira
Keyword(s):  
Stainless Steel ◽  
Injection Molding ◽  
Grain Growth ◽  
316L Stainless Steel ◽  
Metal Injection Molding ◽  
Metal Powders ◽  
Torque Rheometry ◽  
Good Sinter ◽  
Solids Content ◽  
Powder Content

The present study aims to prepare feedstocks for MIM (Metal Injection Molding) where the metal powders are 316L stainless steel powders (SS). The master objective is to compare the performance of a biodegradable binder with a commercial one based on polyolefins. Different challenges must be overcome in SS injection molding, as follows: to decrease binder/carbon content in feedstocks; to decrease carbon contamination during debinding and sintering; to avoid the formation of chromium carbide and presence of precipitation-free zones; to avoid the grain growth during sintering and to reduce the feedstock price. The optimization of the feedstocks was performed using a torque rheometry technique. Feedstocks of coated and uncoated SS powders mixed with an agar-based binder were used to produce sound parts. A feedstock constituted by SS powders mixed with a high quality commercial binder was the standard. SS with agar-based on feedstocks can admit solids content similar to those based on the commercial binder (62 vol.%). For similar powder content, the sinters resulting from feedstocks with the agar-based binder shows a lower quantity of solid solution of carbon and chromium carbides, absence of precipitation-free zones than commercial feedstocks and good sinter soundness. Coating powders with nanocrystalline stainless steel contribute to control grain growth during debinding and sintering.

Effects of Sintering Variables on the Physical and Mechanical Properties of Metal Injection Molding Molded 17-4 PH Stainless Steel

2021 ◽  
Vol 1028 ◽  
pp. 403-408
Author(s):  
Apang Djafar Shieddieque ◽  
Shinta Virdhian ◽  
Moch Iqbal Zaelana Muttahar ◽  
Muhammad Rafi Muttaqin
Keyword(s):  
Mechanical Properties ◽  
Stainless Steel ◽  
Injection Molding ◽  
Relative Density ◽  
Physical And Mechanical Properties ◽  
High Hardness ◽  
Argon Atmosphere ◽  
Metal Injection Molding ◽  
Manufacturing Method ◽  
Small Complex

Metal injection molding (MIM) is a near net shape manufacturing technique for producing small, complex, precision parts in mass production. MIM process is manufacturing method that combines traditional shape-making capability of plastic injection molding and the materials flexibility of powder metallurgy. The process consists of the following four steps: mixing of metal powder and binder, injection molding to shape the component, debinding to remove the binder in the component, sintering to consolidate the debound parts. In this research, the physical and mechanical properties of metal injection molded 17-4 PH stainless steel were investigated with the variation of sintering temperatures (1300 °C - 1360 °C) and atmosphere conditions (argon and vacuum conditions). The relative density, microstructure, distortion, and hardness are measured and analyzed in this study. The results show that highest relative density of 87%, relative homogeneous shrinkage and high hardness are achieved by sintering at 1360 °C for 1.5 hours and argon atmosphere. At the same sintering temperature and time, sintering in vacuum shows lower relative density (81%) than that in argon condition due to pores growth. The pore growths were not observed in the argon atmosphere. It can be concluded that sintering stages more rapidly under vacuum condition. The hardness measurements result also showed that high hardness is obtained by high density parts. The optimum average hardness obtained in this study is 239 HV. However, the hardness properties results are still lower than 280 HV according to MPIF Standard 35 for MIM parts.

Application of the Grey-Taguchi Method to the Optimization of Metal Injection Molding (MIM) Process

2010 ◽  
Vol 443 ◽  
pp. 63-68 ◽  
Author(s):  
Khairur Rijal Jamaludin ◽  
Norhamidi Muhamad ◽  
Mohd Nizam Ab. Rahman ◽  
Sufizar Ahmad ◽  
Mohd Halim Irwan Ibrahim ◽  
...  
Keyword(s):  
Injection Molding ◽  
Taguchi Method ◽  
Mold Temperature ◽  
Parameter Design ◽  
Metal Injection Molding ◽  
Quality Performance ◽  
Surface Appearance ◽  
Grey Relational Grade ◽  
Grey Relational ◽  
Grey Taguchi

The Grey-Taguchi method was adopted in this study to optimize the injection molding parameters for the MIM green compacts with multiple quality performance. A Grey relational grade obtained from the Grey relational analysis is used as the quality performance in the Taguchi method. Then, the optimum injection molding parameters are determined using the parameter design proposed by the Taguchi method. The result concluded that the mold temperature (D) is very significant, by the fact that the ANOVA shows its contribution to excellent surface appearance as well as strong and dense green compacts is 38.82%.

Sign in / Sign up

Export Citation Format

Share Document