Read e-book online Material Engineering Practice IX PDF

By Mária Mihaliková and Pavol Zubko

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Key Engineering Materials Vol. 635 39 Fig. 16 The microstructures of AL bushing in dependence of place Summary In the contribution was presented the view of nowadays progressive technology utilized at the demountable join of aluminum materials, mainly in the automobile, pipe and civil industry. The presented experiments were oriented to evaluation of material at various technological conditions on the created bushing with and without threads in it, for creating of mechanical thread joint. The research project was focused on the research of technological conditions of thermal drilling and evaluation of the quality of the holes, collars and bushings with single-layer and multi-layer material joints.

635 37 Experimental Methods and Results of Testing During the testing of thermal drilling technology, there were verified the suitability of selected material, the quality of produced holes, bushings, collars and threads at various technological conditions and for observe the macro and microstructure of mentioned materials. For experimental aims, there were proposed for samples non-ferrous material - aluminum, according to standard STN 42 4401, jacket 30 x 30 x 2 mm. In the Table 1 is shown the chemical compositions of testing material AlMgSi.

The most common include IF (Interstitial Free) steel and micro-alloyed steel. Use the sheet quality depends on the point of application in the production car. Testing and product testing is a standard part of the process of innovation and production itself. Testing of automotive steels under dynamic conditions is increasingly important. Changing the hardness HV 1 was performed on the fractured bars on the static and dynamic loading conditions. Tests were made on steel IF and S 460. Introduction The automotive industry is constantly growing and it is therefore necessary to build research, development and innovation capacities that facilitate faster product development and cost reduction.

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