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Investment casting process—the problem of shell delamination
A few days ago, a friend asked me if I had any materials on shell delamination. I thought he had a problem with some product, but actually, he wanted me to share information on shell delamination. And sure enough, we encountered such a shell delamination issue today. Here's what happened: After firing, when washing the shell of a product, we found that the inner surface layer had severely peeled off. No matter how we washed or poured it, we couldn't clean the shell properly. So, we...
A friend posted two photos with the question: "The disc tray holes are all reinforced with metal. Could you please tell me how to prevent this during the casing manufacturing process?" This is actually a very simple casting defect, and its cause is also quite simple. However, you might not be able to figure it out without careful analysis. But if you regularly read my WeChat official account, analyzing the cause of such defects will be very easy, so please follow my WeChat...
How to Reduce Porosity Defects in Cast Al-Si Alloys
Hello everyone, I'm Venda from China. I've been working in the lost wax investment casting industry for over 20 years. Today, I'd like to briefly discuss how to reduce porosity in cast Al-Si alloys. If you have any insights, please leave me a message. My WhatsApp account is: +8618562112686. Sr modification is a key process in the casting of hypoeutectic Al-Si alloys. However, Sr modification can increase porosity in castings. This is partly because the introduction of Sr increases the Al-Si...
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