scholarly journals Development of volume deposition on cast iron by additive manufacturing

2016 ◽  
Author(s):  
Niyanth Sridharan ◽  
Ryan R. Dehoff ◽  
Brian H. Jordan ◽  
Suresh S. Babu
Keyword(s):  
Cast Iron ◽  
Additive Manufacturing

Additive manufacturing for refrigerant compressors

2020 ◽  
pp. 095440892092205
Author(s):  
C Thomas ◽  
U Hesse
Keyword(s):  
Cast Iron ◽  
Additive Manufacturing ◽  
Driving Factors ◽  
Small Scale ◽  
New Materials ◽  
Lightweight Materials ◽  
Iron Aluminum ◽  
Manufacturing Methods ◽  
Sealing Elements

The requirements for compressors in refrigeration industry become more demanding each year. Requirements regarding efficiency, durability, and also the possibility / demand of dry running machines are the main driving factors. So far, the majority of compressors are mainly manufactured out of cast iron, aluminum, steel, and other metals (not including sealing elements), which lead to high costs as well as weights. The scope of this work includes a demonstration of new manufacturing methods and material choices for small-scale compressors as well as a possible transfer to even larger machines. A detailed look on the potential of different material classes and compounds will be presented. The paper also takes into consideration if the new materials have to be used for lubricated compressors or if there is even a possibility for an operation without any oil. Thermodynamic and strength limits will be pointed out as well as the potential to substitute the nowadays used metals-based components by lightweight materials.

scholarly journals Locomotive engines and the future of railway automotive power in Africa: A review

2021 ◽  
Vol 40 (4) ◽  
pp. 660-673
Author(s):  
I.I. Ozigis ◽  
J.I.O. Oche ◽  
N.M. Lawal
Keyword(s):  
South Africa ◽  
Cast Iron ◽  
Additive Manufacturing ◽  
Diesel Engine ◽  
Aluminum Alloys ◽  
3D Printing ◽  
Spare Parts ◽  
Ductile Cast Iron ◽  
Track Length ◽  
The Future

This work presents the review of locomotives and the future of railway automotive power in Africa. Locomotives down time on account of inadequate spare parts still remains a challenge in African. It is thus, imperative to review the locomotives in African, to establish the current capabilities as well as provide recommendations to bridge the gaps and its extrapolated trends in future. Firstly, the comparison factors were track length, electrified rails, number of locomotives and yearly passengers on each of Egypt, Ghana, Kenya, Nigeria, South Africa and Zambia rails. Secondly, the focus was on engine parameters from literatures and maintenance logbooks of locomotives. From available data, it was found that South Africa and Egypt have more advanced rail system than the rest four selected countries. It was also found that additive manufacturing, 3D printing, ductile cast iron and die-forging can be used to produce the engine body for diesel engine using steel and aluminum alloys while aluminum silicon and tin doped with copper are good for reciprocation mechanisms. And finally, increased reliability of locomotives can be guided by an engine selection matrix, while use of renewable and energy hybridization are needed to meet the expansion of railroads in Africa.

scholarly journals Evaluation of Additive Manufacturing Parts Machinability using Automated GMAW ER70S-6 with Nodular Cast Iron

2021 ◽  
Vol 7 (2) ◽  
pp. 88-97
Author(s):  
Augusto Dttmann ◽  
Jefferson de Oliveira Gomes
Keyword(s):  
Cast Iron ◽  
Additive Manufacturing ◽  
Arc Welding ◽  
Nodular Cast Iron ◽  
Machining Process ◽  
High Deposition Rate ◽  
Great Flexibility ◽  
Machining Center ◽  
Manufacturing Techniques ◽  
Welding Processes

Through additive manufacturing is possible to obtain products with few material waste, low production time and great flexibility in geometry. In recent years, the application of arc welding processes has been studied as additive manufacturing techniques for metals. When compared to laser welding processes, they have low equipment cost, high deposition rate, however a low surface quality. This work proposes to study the machinability of additive manufacturing parts using automated GMAW. The deposition was carried out using a robotic arm, using ER70S-6' wire with a substrate of nodular cast iron. Two deposition strategies were carried out, one alternating the passes directions and the other one depositing in the same direction. The machining process used was milling in a three axis machining center. The deposition strategy had an influence on the parts surface finish after machining, as well as on the tool life.

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