Charakteristika metody squeeze casting pro výrobu odlitků
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Abstract
Tato bakalářská práce je zaměřena na sledování procesu krystalizace lití pod tlakem (squeeze casting). V teoretické části práce je popsána metoda odlévání s krystalizací pod tlakem a vliv působení tlaku na krystalizaci. Též je uvedena charakteristika zařízení a slévárenské formy i používaných slitin hliníku. Experimentální část se zabývá sledováním mikrostruktury, hodnoty DAS a tvrdosti odlitků ze slitiny hliníku vyrobených metodou squeeze casting. K tomuto účelu byly odlévané odlitky tvaru komolého kužele. Během krystalizace na taveninu působila pro jednotlivé experimenty tlaková síla 700 000 N, 1000000 N a 2000000 N. Měření tvrdosti odlitků bylo prováděno metodou podle Brinella. Získané hodnoty DAS a tvrdosti byly statisticky vyhodnoceny.
This bachelor thesis is focused on monitoring the squeeze casting proces (crystallisation under pressure). The theoretical part of the thesis describes the squeeze casting method and the effect of pressure on crystallization. Also, the characteristics of the equipment and foundry moulds and aluminium alloys used are also given. The experimental part deals with microstructure monitoring, DAS values and hardness of aluminium alloy castings produced by squeeze casting. For this purpose were cast a frustrum of cones shape. During crystallization of the melt were pressure forces: 700000 N, 1000000 N and 2000000 N were applied for individual experiments. The measurement hardness casting was performed according to the Brinell method. The DAS and hardness values obtained were statistically evaluated.
This bachelor thesis is focused on monitoring the squeeze casting proces (crystallisation under pressure). The theoretical part of the thesis describes the squeeze casting method and the effect of pressure on crystallization. Also, the characteristics of the equipment and foundry moulds and aluminium alloys used are also given. The experimental part deals with microstructure monitoring, DAS values and hardness of aluminium alloy castings produced by squeeze casting. For this purpose were cast a frustrum of cones shape. During crystallization of the melt were pressure forces: 700000 N, 1000000 N and 2000000 N were applied for individual experiments. The measurement hardness casting was performed according to the Brinell method. The DAS and hardness values obtained were statistically evaluated.
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odlévání s krystalizací pod tlakem, odlitek, slitina hliníku AlSi 12, mikrostruktura, tvrdost odlitku, squeeze casting, aluminium alloy AlSi 12, casting, microstructure, hardness of casting