Waste copper recasting process

Abstract

The present invention discloses a re-foundry technique and method of waste copper used for producing copper alloy cast formed parts by utilizing waste copper. The main method in accordance with the present invention comprises selecting waste and old copper scrap such as red copper and brass and right amount of rare-earth alloy elements; heating them to 1100-1200 DEG C at an intermediate frequency electric stove, adding alloy element and rare earth of 0.03%-0.5% after a thoroughly stirring, performing an affinage and deterioration processing, straring casting after achieving the preceptive casting temperature, and finally, warehousing after a cleaning and check-up. Casting parts produced by adopting said technological process exhibit high surface brightness, compact internal organizing, without gas cavities, inclusion and abscess air holes therein, which all data entirety achieve performance levels of casting parts of the same breed variety, in china and overseas.

Description

technical field

[0001] The invention relates to a recasting process of scrap copper by adding rare earth elements, which can improve the performance of copper alloy castings produced by using scrap copper. Background technique

[0002] With the advancement of domestic production technology, the requirements for equipment are becoming more and more stringent. Among them, the demand for copper parts has increased significantly in recent years, and the amount of scrap copper has also increased day by day. my country's copper resources are relatively scarce, and the international copper price has remained high. The recycling of waste copper is in line with my country's development strategy. Due to the inability to control factors such as inclusions, porosity, and shrinkage cavities in the traditional recycled copper casting process, the performance of the castings is not high, and it cannot be used on equipment that has high performance requirements for copper parts, or even i...

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