Technology method for double-metal composite casting

Abstract

The invention relates to a technology method for double-metal composite casting. The technology method comprises the steps of molten steel feeding I, joint surface handling, molten steel feeding II, vibration crystallization, cooling and annealing. The molten steel feeding I and the molten steel feeding II are successive blanking of two kinds of molten metal. According to the joint surface handling step, chemical heat treatment is carried out on a joint surface with nonmetal. After the technology method is adopted, when composite casting of two kinds of metal is carried out, the joint surface of the different kinds of metal is pure in texture grain is refined, and the defects such as impurity inclusion and slag inclusion of casted products are prevented. In addition, grain refinement is facilitated by the adoption of vibration crystallization, the density of texture is guaranteed, the abrasive resistance of a casting can be improved easily, the reject ratio of the casting is further reduced, cost is reduced for enterprises, and economic benefits are increased.

Description

technical field [0001] The invention relates to the field of mechanical casting, in particular to a process method of bimetal composite casting. Background technique [0002] In the field of modern machinery manufacturing, the foundry industry is playing an increasingly important role. In the commonly used sand casting, when bimetallic composite pouring is performed, the flowing molten steel will cause damage to the joint surface of different metals. The grains are coarse, and the cast products have defects such as inclusions and slag inclusions. In addition, the cast castings often have non-wear-resistant defects, which makes it necessary to eliminate a large number of unqualified castings every year in engineering applications, thereby increasing the number of enterprises. cost, not conducive to economic benefits. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a bimetal composite pouring process, which can m...

AI Technical Summary

Problems solved by technology

In the commonly used sand casting, when bimetallic composite pouring is performed, the flowing molten steel will cause damage to the joint surface of different metals. The grains are coarse, and the cast products have defects such as inclusions and slag inclusions. In addition, the cast castings often have non-wear-resistant defects, which makes it necessary to eliminate a large number of unqualified castings every year in engineering applications, thereby increasing the number of enterprises. cost, not conducive to economic efficiency