The main defect of aluminum alloy casting is crack


The main defect of aluminum alloy casting is crack
1. Casting crack: a crack on the aluminum Casting Foundry formed at a high temperature. It is easy to occur when the casting volume shrinkage is large and the thermal expansion coefficient is large.
2. Heat treatment crack: it often appears as transgranular crack due to excessive heat treatment or overheating.
Causes of cracks: unreasonable Aluminum Casting design, sharp Angle, wall thickness changes too much. In this case, cracks should be improved casting structure design, avoid sharp corners, wall thickness to uniform, smooth transition. Sand mold yield bad will also produce cracks. Measures should be taken to increase sand mold yield. Local overheating of the casting mold will lead to cracks. It is necessary to ensure that all parts of the casting solidify at the same time or in sequence, and improve the design of casting system. Too high casting temperature will produce cracks, so the casting temperature should be appropriately reduced. The thermal correction method should be used to control the cooling time of casting when the casting is taken out too early and will be deformed. Heat treatment overheating, excessive cooling speed after crack, casting deformation using thermal correction method. Control heat treatment temperature correctly, reduce quenching cooling speed.
aluminum Casting Foundry

评论

发表评论

此博客中的热门博文

How To Solve The Burr Of Aluminum Castings

图片
The burr phenomenon of aluminum alloy is inevitable, and there are many methods to deal with the burr. In the production process of die casting, due to factors such as pressure shock and insufficient clamping force, burrs are inevitable. In recent years, with the increasing quality requirements of die castings, the requirements for burrs have become more stringent, and methods of deburring have also emerged endlessly. The deburring process is the most annoying.  china aluminum decoration base manufacturer  introduces you to various  aluminum casting solutions , which can help you better understand the various deburring methods. And according to your needs to choose the appropriate deburring method. 1. Artificial deburring This is the most traditional and commonly used method in die-casting plants, using files (files include manual files and pneumatic files), sandpaper, belt machines, grinding heads, etc. as auxiliary tools. Disadvantages: labor cost is expensive, efficiency is
阅读全文

Explanation of die casting design process

图片
In recent years, the method of adding rare earth elements to  Die-Casting Tooling Design  surface strengthening has been widely praised. This is because rare earth elements have many functions [13], such as improving the permeability rate, strengthening the surface and purifying the surface, etc., which have a great impact on the improvement of the mold surface structure, physical, chemical and mechanical properties of the surface, and can improve the permeability rate, strengthening the surface and forming rare earth compounds. At the same time, it can eliminate the harmful effect of trace impurities on grain boundary, and strengthen and stabilize grain boundary on mold cavity surface. In addition, rare earth elements interact with harmful elements in steel to form compounds with high melting point, which can inhibit the segregation of these harmful elements on grain boundary, thus reducing the brittleness in deep layer. In die casting die surface strengthening process adding rare
阅读全文

Is Aluminum Good For Casting?

图片
  Aluminum castings  are often seen as having a range of advantages. The versatility of aluminum allows it to be used to produce a wide range of products and components.   The Advantages of Aluminum for Metal Casting The high malleability of aluminum makes it possible to produce aluminum castings that are near net shape (NNS). Manufacturers can forge complex castings with high dimensional accuracy in a wide range of geometric shapes. Aluminum castings are much lighter than castings made from other metals. Despite their lightweight, the alloying process ensures that an aluminum casting will remain hard and retain a good strength to weight ratio. Many aluminum alloys are stronger than steel. In comparison to any other alloy, aluminum alloy castings can withstand the highest operating temperatures. Aluminum dissipates heat quickly, which increases safety and speeds up production times. Castings made using aluminum alloys are particularly resistant to corrosion. They provide excellent shie
阅读全文