Optimisation of feni type alloy production

Improved manufacturing process conditions for producing feni alloys with optimisation of quality and properties. The research should result in new quality alloy grades of this type.

The goal of the project is to optimise the technology for manufacturing flat products for electrical engineering components from iron and nickel-based alloys. The project objectives include elimination of surface defects in cast ingots and minimisation of side edge cracking during forming of the currently produced FeNi-based materials. By this means, the utilisation of the metal and consequently productivity and efficiency of production will be enhanced. Further activities will include optimisation for welding of strips and subsequent heat treatment of welds to achieve more favourable mechanical properties in these locations. The third task involves technology development (involving the effects of alloying elements) for expansion of the product range for requested alloys of FeNi38Co5Cu5 and FeNi79Mo4 types. Experimental heat will be produced while forming and welding is performed in the first year of the project. Input data for consequent experimental processes will be obtained by detailed analysis of these materials. The contents of the main alloying and deleterious elements will be thoroughly measured both in incoming raw materials and in the final products. The latter elements may accumulate owing to large portions of recycled scrap in input materials. Casting conditions will be optimised for controlling surface defects in ingots, thus enhancing the material utilisation percentage. Specimens for physical measurements will be prepared. During the second project year, simulation of forming processes will be conducted and the proposed procedures tried in an experimental rolling mill. Microstructure and mechanical properties of all processed specimens will be examined. Recrystallisation analysis will yield information on the forging reduction achieved with respect to the section shape of feed material (round section) and temperature (different temperatures can be expected at the beginning of rolling and upon several passes). Crucible amounts of novel steel types will be cast, tested for technological properties (formability, plasticity) and experimentally rolled. The heat treatment procedure of welded joints will be optimised in order to bring the joint properties closer to the properties of the rolled FeNi matrix. In the third project year, initial products from new types of materials will be manufactured. The forming of new alloyed materials will be simulated. Several passes, process temperatures and rolling reductions will be optimised to eliminate surface defects (which often occur with the existing technology) and to cut down the percentage of rejects in previously manufactured materials. A trial production of new types of materials will be launched as part of expanding the product range of KOVOHUTE ROKYCANY. In the fourth year of the project, the success of newly developed production procedures will be verified by the manufacturing of actual products while compliance with prescribed properties will be assessed. Reviews of achieved project results will be performed throughout the project duration at annual opposition proceedings and at the final opposition proceeding. At the same time, the project results may be verified by the implementation of new production procedures of iron-nickel-based alloys for power devices on the site of the end user of the project results: KOVOHUTE ROKYCANY, A.S. The scientific findings will be presented at conferences and published in scientific journals. Most of the results from the present project will be implemented in the CZECH REPUBLIC. The achieved results will form the basis for adaptation of the existing technological procedures. The conclusions of the secondary tasks (see the previous table) will be published via technical and research reports delivered to the principal investigator. Keywords: FeNi (Iron / Nickel)
Project ID: 
3 662
Start date: 
Project Duration: 
Project costs: 
1 100 000.00€
Technological Area: 
Metals and Alloys
Market Area: 
Electronic Components

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