scholarly journals Metal Injection Molding of High Speed Steel Powder with a Slight Amount of B Addition

2003 ◽  
Vol 50 (7) ◽  
pp. 561-565 ◽  
Author(s):  
Sunao Ohstuka ◽  
Junjiro Takekawa
Keyword(s):  
Injection Molding ◽  
High Speed ◽  
High Speed Steel ◽  
Steel Powder ◽  
Metal Injection Molding ◽  
Slight Amount

Effects of Binders System on Sintered Properties of Metal Injection Molding Parts of M2 High Speed Steel

2014 ◽  
Vol 1024 ◽  
pp. 201-204 ◽  
Author(s):  
Rosliza Sauti ◽  
Nor‘aini Wahab ◽  
Mohd Afian Omar ◽  
I.N. Ahmad
Keyword(s):  
Injection Molding ◽  
High Speed ◽  
High Speed Steel ◽  
Palm Stearin ◽  
Steel Powder ◽  
Paraffin Wax ◽  
Metal Injection Molding ◽  
Waste Rubber ◽  
Vacuum Atmosphere ◽  
M2 High Speed Steel

This paper reports on the compatibility of waste rubber binder combined with conventional binder, paraffin wax and local binder, palm stearin for M2 High Speed Steel injection molding in order to obtain the better properties. The feedstock was prepared at a powder loading of 65 vol.% using 22um M2 High Speed Steel powder and the binders consisting of 55wt.% paraffin wax/palm stearin, 21wt.% polyethylene, 14wt.% waste rubber and 10wt.% stearic acid. The specimens were then sintered in vacuum atmosphere within a temperature range from 1200°C to 1260°C. The results shown even the best properties is obtain from the conventional binders, paraffin wax, thus the properties of local binders palm stearin is still comparable and good. The maximum density of paraffin wax binder was 8.095g/cm3 achieved at temperature 1250°C and palm stearin binder was 8.111g/cm3 achieved at temperature 1240°C. Therefore, in term the best strength of paraffin wax was 2351Mpa whilst palm stearin was 2210MPa, both recorded at temperature 1230°C.

Application of Taguchi Method for Parameters Optimization in Micro Metal Injection Molding

2011 ◽  
Vol 52-54 ◽  
pp. 244-248
Author(s):  
Haw Pei Li ◽  
Norhamidi Muhamad ◽  
Abu Bakar Sulong ◽  
Heng Shye Yunn ◽  
Hooman Abolhasani
Keyword(s):  
Injection Molding ◽  
Signal To Noise Ratio ◽  
Steel Powder ◽  
Mold Temperature ◽  
Parameters Optimization ◽  
Simultaneous Optimization ◽  
Metal Injection Molding ◽  
Surface Appearance ◽  
Optimal Injection ◽  
Acetate Butyrate

Optimization of injection parameters in Micro Metal Injection Molding (μMIM) was described in this study. Stainless steel powder was mixed with Polyethelena Glycol (PEG), Polymethyl Methacrilate (PMMA) and Cellulose Acetate Butyrate (CAB) to produce feedstock. Design of Experiments (DOE) of Taguchi L-27 (313) orthogonal array technique has been used to investigate the significance and optimal injection molding parameters. The signal-to-noise ratio and analysis of variance (ANOVA) are applied to study the optimum levels and effects of process parameters. Simultaneous optimization to obtain the highest green density and excellent surface appearance was discussed. The result concluded that the mold temperature (D) is the most statistically significant process parameter and its contribution to the best appearance and density is the highest.

The Influence of Sintering Atmosphere for Metal Injection Moulding M2 High Speed Steel

2014 ◽  
Vol 879 ◽  
pp. 169-174
Author(s):  
R. Sauti ◽  
N.A. Wahab ◽  
M.A. Omar ◽  
I.N. Ahmad
Keyword(s):  
Mechanical Properties ◽  
Injection Moulding ◽  
High Speed ◽  
High Speed Steel ◽  
Steel Powder ◽  
Sintering Atmosphere ◽  
Temperature Range ◽  
Waste Rubber ◽  
Vacuum Atmosphere ◽  
M2 High Speed Steel

This paper reports on the compatibility of waste rubber as binder for M2 High Speed Steel injection moulding. The feedstock was prepared at a powder loading of 65 vol.% using 22μm M2 High Speed Steel powder and the binders consisting of 55wt.% paraffin wax, 21wt.% polyethylene, 14wt.% waste rubber and 10wt.% stearic acid. The specimens were then sintered in vacuum and 95%N2/5%H2 atmosphere. The sintering in vacuum atmosphere occurred within a temperature range from1200°C to 1260°C, whilst the 95%N2/5%H2 atmosphere was carried out within a temperature range from 1220°C to 1300°C. The effects of the sintering atmosphere and temperature on the physical properties, mechanical properties and microstructure were investigated.

scholarly journals Study on Stability of a Novel Binder System Based on Palm Stearin in Metal Injection Moulding Application

2007 ◽  
Vol 4 (2) ◽  
pp. 1
Author(s):  
Muhammad Hussain Ismail ◽  
Norhamidi Muhamad ◽  
Aidah Jumahat ◽  
Istikamah Subuki ◽  
Mohd Afian Omar
Keyword(s):  
Injection Molding ◽  
Flow Characteristics ◽  
Injection Pressure ◽  
Palm Stearin ◽  
Steel Powder ◽  
Metal Injection Molding ◽  
Injection Molding Process ◽  
Binder System ◽  
Molding Process ◽  
Flow Activation Energy

Metal Injection Molding (MIM) is a wellestablished technology for manufacturing a variety of complex and small precision parts. In this paper, fundamental rheological characteristics of MIM feedstock using palm stearin are theoretically analyzed and presented. The feedstock consisted of gas atomized 316L stainless steel powder at three different particle size distributions and the binder system of palm stearin (PS) and polyethylene (PE). The powder loading used was 60vol % for all samples (monosize 16 µm, monosize 45 µm, and bimodal 16 µm + 45 µm) and the binder system of 40vol %(PS/PE = 40/60). The viscosity of MIM feedstock at different temperatures and shear rates was measured and evaluated. Results showed that, the feedstock containing palm stearin exhibited suitable rheological properties by increasing the fluidity of feedstock in MIM process. The rheological results also showed a pseudoplastic flow characteristics, which poses higher value of shear sensitivity (n) and lower value of flow activation energy (E), that are both favourable for injection molding process. The green parts were successfully injected and exhibited adequate strength for handling by optimizing the injection pressure and temperature.

scholarly journals A Study on the Sintering Behavior of T42 High Speed Steel by Powder Injection Molding (PIM) Process

2012 ◽  
Vol 19 (2) ◽  
pp. 117-121 ◽  
Author(s):  
Dong-Wook Park ◽  
Hye-Seong Kim ◽  
Young-Sam Kwon ◽  
Kwon-Koo Cho ◽  
Su-Gun Lim ◽  
...  
Keyword(s):  
Injection Molding ◽  
High Speed ◽  
High Speed Steel ◽  
Powder Injection Molding ◽  
Powder Injection ◽  
Sintering Behavior
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