Solution of Surface Crack of Die Casting Aluminum Alloy

Release time:

2024-02-29

Features:

The surface of the casting is linear or wavy lines, narrow and long, under the action of external force has a development trend; cold crack cracking metal is not oxidized; ③ hot crack a crack metal has been oxidized.

Cause:

① The iron content in the alloy is too high or the silicon content is too high; ② The content of harmful impurities in the kettle is too high, which reduces the plasticity of the alloy; ③ The zinc content in Al-Si-Cu alloy is too high or the copper content is too low; ④ The overall temperature of the mold, especially the mold cavity, is too low; ⑤ The shrinkage of the casting wall thickness and thickness are blocked, and the sharp angle is stressed.

Processing method:

① Correctly control the alloy composition. In some cases, pure aluminum ingot can be added to the alloy to reduce the magnesium content in the alloy or aluminum-silicon intermediate alloy can be added to the aluminum alloy to increase the silicon content. ② Change the casting structure, add angle, change the die inclination and reduce the wall thickness difference; ③ Change or increase the ejection position to make the ejection force uniform; ④ Shorten the mold opening and core pulling time to improve the mold temperature and keep the mold thermal balance.

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"Die Casting Weekly"-On June 2, 2022, Zhejiang Tianya Jiangtao Power Co., Ltd. ("Tianya Jiangtao") and Lijin Group Ningbo Lijin Technology Co., Ltd. ("Ningbo Lijin Technology") jointly held a signing ceremony for batch purchase of large die casting units and strategic cooperation. It is reported that Tianya Jiangtao will introduce 10 sets of 1250-6000T large intelligent die casting units from Ningbo Lijin Technology. Tianya Jiangtao Chairman Hu Ronghui, Vice President Zhao Hongfu, Factory Director Peng Wenjiang, Ningbo Lijin Technology General Manager Zhang Jun, Sales Director Zhou Kang and other leaders attended the signing ceremony.

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