Alloy modifying is common practice for improving the structure of material. One often used material, where modification AlSi7Mg0.3 alloy. And realized by strontium. The paper deals with an experiment that was at Faculty Production Technology and Management Jan Evangelista Purkyně University in Ústí nad Labem, which dealt effect modifications strontium on AlSi7Mg0.3. In frame its were analyzed metallographic samples observed structures unmodified modified material microscope. Was evaluated...

This article deals with a possibility of another extension longer lasting addition coatings titanium dioxide.The research based on the use nanoparticles has development at present.Potential added large use.Particles nanosize, i.e. below 100 nm exhibit other properties than larger particles and because that this area is being explored in all possible sectors.This specifically extending lifetime working surface molds made aluminum alloy injection rubber mixtures used automotive.Lifetime PFTE...

The aim of the research was to evaluate influence porosity size on mechanical properties AlSi7Mg0.3 (EN AC 42 100) alloy before and after thermal treatment. For analyses casts same production type (forms used for tires production) were used. They casted employing low-pressure casting technology. Since negative Al alloys is generally known there no quantitative assessment. In this relation in structure its verified quantified. Static tensile testing has proven between a an material...

Al-Si Alloys are a leading casting alloys based on aluminum. Machining of aluminum is currently frequently used and it an important area production. The paper deals with experiment, that was realized at the Faculty Production Technology Management, University Jan Evangelista Purkyne in Ústí nad Labem, where machined alloy AlSi7Mg0.3. Samples were made for machining because master AlSi7Mg0.3, part castings left its original condition modified by strontium. This describes evaluation surface...

Modifying of alloys is an important part the metallurgical process and involves course also aluminum, specifically Al-Si (silumin) in our case. One elements that it possible used to modify for type alloy antimony (Sb). This paper investigates potential impact modification this element AlSi7Mg0.3 on tool wear cutting process. Within experiments were made three casts master without additional from ligatures more subsequently modified by 0.05 wt% Sb cast. These castings then machined same...

The article discusses the effect of heat treatment on microstructure aluminum alloy AlSi7CrMnCu2.5. Heat alloys can be defined as a technological process by which products or components in solid state are exposed to one more annealing cycles order achieve desired structure. Thanks these structural changes it is possible affect mechanical properties hardenable alloy. Samples where research was conducted were cast from AlSi7CrMnCu2.5 produced gravity casting technology metal mold....

Al-Si alloys are leading casting based on aluminum. Machining of aluminum is currently frequently used and it an important area production. The paper deals with experiment that was conducted at the Faculty Production Technology Management, University Jan Evangelista Purkyně in Ústí nad Labem, where machined alloy AlSi7Mg0,3. Samples were made for processing from master AlSi7Mg0,3, subsequently unmodified modified strontium Sr. This describes evaluation tool wear terms how or modification may...

Material crystal compositions and their phase structures have become the necessary important part of materials research advanced technology in recent decades. Each property information about material structure is more or less immediate way depending on composition. Prerequisite any technological breakthroughs this area therefore detailed structural parameters materials.

This article deals with the influence of applied solution annealing temperatures in precipita-tion hardening process on resulting increase mechanical properties Al-Si-Cu alloy cast-ings different copper contents alloy. AlSi7Cu2 and AlSi7Cu4 alloys were cast by gravity casting a metal molds. Each samples was subjected to Vickers microhardness measure-ment solid α(Al) Brinnel hardness measurement. Microscopic analysis evalu-ation internal structure each carried out relation used...

This paper evaluates the influence of different amounts antimony addition on corrosion resistance alloy Al-Si. The aluminium alloys, methods testing and evaluation in alloying Al-Si alloys is described introduction paper. specifically AlSi7Mg0.3 alloyed by 0; 0.001; 0.005; 0.01 0.05 wt. % was chosen for experiment. prepared were subjected to two types tests environment - atmosphere chamber. attack experimental samples evaluated from both macroscopic microscopic point view. aim this assess...

Using of cutting inserts is currently a normal part the manufacturing process. The article deals with analysis tool wear after machining at one selected insert. Evaluation this insert was made by electron microscopy. There used SEM and EDS analysis. For purpose scanning microscope Tescan Vega 3 analyzer Bruker 16 which microscope. These can provide good picture structure construction inserts, their composition for situation on machining. This may assist in finding suitable conditions. As...

This work was focused on the research of different variability production deep-drawing sheets made AlMg3 alloy which could influence their properties e.g. non alloying elements Fe, Mn, heat treatment parameters and structure with aim to judge ascertained analyzed sheets. The mechanical properties, mainly highest elongation, other (grain size, metallurgical purity), were measured due they had main alloy. For this been obtained 5 than chemical composition realized ?complex analyze?, find up...

Modification alloy is an important part of the metallurgical process, and this also applies, course, for aluminum alloys, particularly Al-Si (silumins). As a modification material we can use using selected element or heat treatment combination both processes. One elements that it possible to modify used antimony (Sb). The paper examines effect on final structure AlSi9CuMnNi. In experiments were made three castings from AlSi9CuMnNi without modification, with treatment, too. described...

Modification alloy is an important part of the metallurgical process, and this also applies, course, for aluminum alloys, particularly Al-Si (silumins). As a modification material we can use using selected element or heat treatment combination both processes. One elements that it possible to modify used antimony (Sb). The paper examines effect on final tool wear after machining AlSi9CuMnNi. In experiments were made three castings from AlSi9CuMnNi without modification, with treatment, too....

Using of cutting inserts is currently a normal part the manufacturing process. The article deals with tool wear evaluation selected for turning by electron microscopy. Use microscopy helps on closer analysis machining consequences forthese plates, because microscope images captured electronmicroscope have greater depth sharpness and can display examined object plasticity. It yet another way to explore objects extends possibilities obtaining large quantities information. These analyzes were...

In the article, study of polymer properties is dealt with as a result production technology on pat-terns, which were made by injecting, machining extruded profile and 3D printing. All samples from iglidur® J260 material, they subsequently tested in order to find out roughness, breaking strength, hardness according Shore, friction coefficient swelling. Further-more, exposed light microscopy, where material structure was studied, especially view defects, distribution shape solid lubricants....

The aim of this research work was to determine the causes cracking unit rolled at initial hot rolling AlMg5 alloy. Failure occurs in central area plate. In alloy carried out chemical composition material near defect and its comparison with entire melt, which pointed a significant reduction magnesium content defect. Macroscopic, microscopic fractography analysis were both fracture surface immediate vicinity. indicated that surface, also structure show character oxide inclusions films or...

The paper describes the research focused on influence of antimony as modificator in one most common aluminium foundry alloys - alloy AlSi7Mg0.3. aim described experiment was to examine addition AlSi7Mg0.3 microstructure changes. description changes performed based analysis realized using confocal laser microscope and electron complemented by energy dispersive spectrometry induced antimony. microstructure, which were evoked antimony, caused mechanical properties (especially ductility). This...

This paper reports the preparation and characterization of thin transparent nanolayers with phase composition ZrF4 different modification SiO2 special focus on affecting surface roughness material way exclusion nanolayer polished aluminium material. The was prepared by sol-gel method. final treatment based PTFE applied some samples. is suitable for increasing wear resistance. films were characterized help SEM microscopy EDS analysis. measured classical tester. There published results this...

Paper deals with problems of nanoparticles and nanomaterials applied in technical practice. In this time, we are looking for examining ways their best properties utilization. When being on the base material (metal, plastic, glass, incl. paper, cloth, etc.) form very thin layer, then can obtain different properties, mostly advantageous, including improvement mechanical properties. To these it is necessary to apply layer purpose need extremely fine granular that be produced by means milling...

Modification of molten metal is performed for the eutectic and subeutectic silumins prior to its casting by using strontium, which has a time-limited effect up 1-1.5 hours.Beryllium used in order prolong modifying effect.The aim experiment examine both distribution beryllium structure on temporary extension modification Al-Si alloys combination with strontium modifier.Beryllium as master AlBe 5 alloy, samples are cast gravity preheated moulding.Chemical analysis means spectral...