Cast aluminum elements

Characteristics of oxidized slag slag: Oxidized slag is mostly distributed on the upper surface of the casting, at the corner where the mold is not ventilated. Fractures are mostly gray or yellow, found by X-ray or during mechanical processing, and can also be found in caustic washing, pickling, or anodization. The charge is not clean, the amount of returned charge is too much 2. Poor system design is bad 3. The slag in the alloy solution has not been removed cleanly. Improper pouring operation, slag inclusion 5. Refinement time after deteriorating treatment is not enough to prevent: 1. The charge should be blown with sand, and the amount of recycled charge should be properly reduced. Improve the design of the gating system and improve its slag blocking capacity 3. Use appropriate flux to remove slag 4. Pouring should be smooth and should pay attention to slag 5. Pre-cast alloy liquid should be left standing for a certain time after refining

Disadvantages of the two-pore bubble: The pores in the wall of the three castings are generally round or oval, with a smooth surface, usually shiny oxide, and sometimes oil yellow. Surface pores and bubbles can be found by sandblasting. The internal pores of bubbles can be found by X-ray or mechanical processing. The pores are black on the X-ray film. Causes: 1. Casting alloy is not smooth, involved in gas 2. Type (core) sand mixed with organic impurities (such as coal dust, grass root horse dung, etc.) 3. Poor mold and core ventilation. Cold iron surface shrinkage hole 5. Pouring system design failure prevention method: 1. Correctly control the pouring speed and avoid getting entrained in gas. 2. Type (core) sand must not be mixed with organic impurities to reduce the amount of gas generated in the modeling material. Improve the exhaust capacity of the (core) sand 4. Correct selection and handling of cold iron 5. Improved pouring system design

Three shrinkage defect features: aluminum castings generally occur in the vicinity of the runner within the sprue riser thick part of the root, the thickness of the wall adapter and the thin wall with a large plane. In the as-cast state, the fracture is gray, and the light yellow is grayish yellow or grayish black after heat treatment. The filamentous shrinkage on the x-ray film is severe and the filamentous shrinkage can be found through X-rays, fluorescence low-fold fractures, etc. 1. Riser feeding effect is poor 2. The charge of the charge is too much 3. Overheating around the sprue Excessive sand-type moisture, sand core is not dried 5. Alloy grains are coarse 6. Improper positioning of the casting in the mold. Pouring temperature is too high, the pouring speed is too fast. Prevent methods: 1. Refill the molten metal from the riser and improve the riser design 2. The charge should be clean and free of corrosion. Set up the riser at the shrinkage part of the casting, place the cold iron or cold iron together with the riser. Control sand moisture, and sand core dry Take measures to refine grains. Improve the casting's position in the mold to lower the pouring temperature and pouring speed

PVC Marbling Ceiling Tiles

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Specification size	1220mm*2440mm
Surface Finish	High UV coating
Thickness	1-9mm
Color	Customized colors
Hardness	3H-6H
Materials	PVC
Type	PVC Marbling Ceiling Tiles
Installation	Easy installation
Life Span	15 years
Place of original	China

PVC Marbling Ceiling Tiles

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