Quality Requirements For Casting Aluminum Castings
Feb 28, 2014
1. Casting speed: The casting speed of aluminum casting is directly proportional to the depth of the ingot liquid cavity. If the casting speed increases, the depth and temperature gradient of the ingot will increase, which will cause a section of the liquid cavity to appear at the bottom of the liquid cavity, resulting in greater shrinkage stress, and ultimately increasing the probability of hot cracks in the ingot. , So we should control the speed.
2. Casting temperature: A good casting temperature for aluminum castings will keep the liquid metal with good fluidity, thereby reducing structural stress and preventing cracks. Generally, the casting temperature should be determined according to the type of material and the specifications of the ingot. If the temperature is not appropriate, it will increase the internal stress, causing cracks or cracks in the casting. Too low temperature is also not good, because this will cause defects such as cold barriers, slag inclusions, and even cracks on the surface of the ingot. If it is severe, the casting will not continue.
3. Liquid level height: The position of the liquid level is also very important. If it is too low, the hot cracking tendency of the material will increase, and if it is serious, it will affect the casting process. If the liquid level is too high, it will increase the segregation degree of the ingot. Therefore, it is necessary to ensure a suitable liquid level. Too high or low will not work.
4, the castings must not have defects such as cracks, cold barriers, sand holes, pores, slag holes, shrinkage and slag inclusions.
5. The non-machined surface of the casting should be smooth and straight, and the casting marks should be clear. After pouring and cleaning the riser, it should be flush with the surface of the casting.
6. Castings shall comply with the relevant regulations of GB/T6414 or GB/T11351 or the size and deviation required by the drawings or patterns provided by the demander.
7, castings shall not be hammered, blocked or dipped to eliminate leakage.
Shenzhen Manners Technology Co.,Ltd is the supplier of some of the world’s famous international companies like Blum Novotest, Komet, Geneva Lab, BTL, etc... We specialize in telescoping parts, needle manufacturing, multi-axis CNC machining, Die casting mold, plastic injection mold, stamping mold, Swiss-type turning, laser cut tubing, tube processing, laser welding and automated assemblies for the medical, endoscopic, arthroscopic, orthopedic, firearms, defense, automotive, and specialty industrial markets.
Please contact us if you need: zhang@sz-manners.com.
