Aluminum bronze ingot casting process

Abstract

The invention provides an aluminum bronze ingot casting process. Graphite powder and cryolite are adopted as raw materials to prepare a covering agent; the thickness of scattering the covering agent by each time is not more than 1 mm; and an ultrasonic vibrator is mounted at the outer periphery of a crystallizer for vibrating the crystallizer. The process can reduce the slag inclusion defect on the surface layer of a cast ingot, improves the quality and the yield of the cast ingot, can reduce the use level of the covering agent, and reduces the production cost.

Description

technical field [0001] The invention relates to an aluminum bronze ingot casting process. Background technique [0002] The ingot casting process of aluminum bronze QA110-4-4 generally adopts the ingot mold ingot casting method or the horizontal continuous ingot casting method and the vertical ingot casting method. No matter which method is used, due to the higher aluminum content in the alloy, the oxidation tendency of QA110-4-4 aluminum bronze is more serious, and the aluminum bronze is easy to get gas and oxidize during the casting process to form A1203. The dense Al203 film can prevent the continuous oxidation of the copper liquid, but the stirring of the melt during the smelting process, the vibration of the crystallizer and the rolling of the melt in the crystallizer may cause the dense Al203 film to break into blocky Al203. And lose the protective effect on the melt. In the past, the casting of this alloy was often covered with a covering agent made of charcoal ash,...

AI Technical Summary

Problems solved by technology

During the casting process, the massive A1203 that exists on the surface of the melt rolls toward the inner wall of the mold with the melt. Due to cooling and hardening, it is easy to gather and slag, and then, together with the covering agent on the edge, is folded into the gap between the ingot and the wall of the mold In the process of metal solidification, local discontinuity occurs in the process of metal solidification, resulting in the formation of slag inclusions and cold shut defects to reduce the quality of the ingot. These defects seriously affect the yield and mechanical properties of the ingot, and in severe cases cause the entire ingot to be scrapped.