Technical papers on metal injection moulding (MIM)

In the following technical papers Sandvik promotes the adoption of metal injection moulding (MIM) technology with new products and applications development.

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Comparison of master alloy and pre-alloyed 316L for MIM

Metal injection moulded stainless steel components can be made from either pre-alloyed or master alloys powders blended with the appropriate proportion of carbonyl iron powder. This paper describes a comparison of results obtained using pre-alloyed and master alloyed 316L gas atomized powder, each with two different particle size distributions.
Comparison of master alloy and pre-alloyed 316L for MIM (PDF document, 285 kB)

Development of master alloy powders

The development of novel master alloys for nickel-based super-alloys is explored and preliminary mechanical properties and scanning electron microscopy, including energy dispersive x-ray microanalysis, are provided.
Development of master alloy powders (PDF document, 869 kB)

Development of copper MIM powders for thermal management applications

The development of fine, low oxygen copper powders for use in thermal management applications is presented in a joint paper with ARC Seibersdorf describing production and testing of LED substrates.
Development of copper MIM powders for thermal management applications (PDF document, 1.1 MB)

Effect of particle size distribution on processing and properties of MIM 4140 and 4340

A comparison of the processing and properties of 4140 and 4340 steel parts made using gas atomized pre-alloy and master alloy powders.
Effect of particle size distribution on processing and properties of MIM 4140 and 4340  (PDF document, 2.1 MB)

Effect of particle size distribution on processing and properties of MIM 17‑4PH

17-4PH precipitation hardened stainless steel remains one of the most popular alloys used in Metal Injection Moulding today. This paper, reports the results of a systematic study of the effects of particle size distribution on sintering behavior and final properties of 17-4PH.
Effect of particle size distribution on processing and properties of MIM 17‑4PH (PDF document, 2.2 MB)

Effects of particle size and alloy chemistry on processing and properties of MIM powders

In this paper, we reflect on some of the differences in behavior of gas and water atomized powders and on gas atomized powders with different particle size distributions. It is proposed that the lower oxygen levels and spheroidal shape of gas atomized powders provide benefits which are apparent throughout processing and offer opportunities for lower processing costs, improved quality and higher value addition in finished products.
Effects of particle size and alloy chemistry on processing and properties of MIM powders (PDF document, 540 kB)

Influence of gas atomized powder size on mechanical properties of 15‑5PH

This study investigates the effect of particle size distribution on properties of MIM 15-5PH components. This alloy was chosen with a view to controlling Cu loss during sintering as it has a lower Cu content than the more common 17-4PH MIM grade.
Influence of gas atomized powder size on mechanical properties of 15‑5PH (PDF document, 1.6 MB)

MIM of heat-treated alloy 718

The mechanical properties and microstructural evaluation of injection moulded and heat-treated alloy 718 master alloy powder, developed specifically for MIM, are presented.
MIM of heat-treated alloy 718  (PDF document, 477 kB)

Review of the MIM industry: Recent trends in powder size and composition

This paper provides a review of the MIM industry in terms of market size and types of materials currently used. Developments are highlighted in new materials for growth sectors, including fine copper powder for thermal management, nickel base superalloys for hot service environments and cobalt alloys for medical applications.
Review of the MIM industry: Recent trends in powder size and composition (PDF document, 142 kB)

Processing and Properties of MIM AISI 4605 via Master Alloy Routes

A comparison of the processing and properties of 4605 steel parts manufactured made using gas atomized master alloy powders with parts made by an elemental blend route.
Processing and Properties of MIM AISI 4605 via Master Alloy Routes.pdf (PDF document, 1.5 MB)

Properties of MIM AISI 420 via Pre-alloyed and Master Alloy Routes

A comparison of the processing and properties of 420 stainless steel parts manufactured made using gas atomized pre-alloy and master alloy powders.
Properties of MIM AISI 420 via Pre-alloyed and Master Alloy Routes.pdf (PDF document, 2.5 MB)

An Evaluation of the microstructure and mechanical properties of metal injection moulded HK-30

This study investigates the effect of particle size distribution and chemistry on HK-30 component densities and metallurgical properties with a particular focus on grain size and density. The effect of sintering temperature and atmosphere are also evaluated and room temperature mechanical properties presented.
An Evaluation of the microstructure and mechanical properties of metal injection moulded HK-30.pdf (PDF document, 341 kB)