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Control of shrinkage cavity and porosity defects of steel castings

Different steel casting production processes determine different production processes, but they can be basically divided into process design, model making, molding and core making, lower core box, smelting and pouring, sand falling, gas cutting and gouging, heat treatment, grinding and cleaning, inspection and other processes. The shrinkage cavity and...

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Technology of sand casting of steel castings for boom

1.Problem description Sand casting boom steel casting, steel casting No. 322232642, is an accessory of atlas process engineering machinery rock drill in the Netherlands. During the sampling inspection of small batch production after the preliminary trial production is qualified, it is found that some products have shrinkage defects locally,...

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Quality inspection items of railway steel castings

Inspection and test are important means to ensure the quality of steel castings and the process quality of steel castings. In the production process of coupler, in addition to the inspection of raw materials, the real-time monitoring of various process parameters of medium sand in sand treatment system, and...

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Analysis of casting defects of steel castings

The steel castings were trial produced in two batches, and the first time was qualified, and the second time there was shrinkage cavity and porosity defect. After investigating the five aspects of personnel, machines, materials, methods and links, since there are no abnormal changes, it is inferred that the...

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Description of casting defects of steel castings

In order to verify the feasibility and universality of the proposed process design improvement method, three typical steel castings produced according to the traditional process design method were selected for application analysis and verification. The name of steel casting is shell, and the number of steel casting is 136-18-03001....

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Trial production technology of railway steel castings

The production of coupler is divided into two work areas: sand casting and finishing assembly. The main processes of sand mold casting work area include: sand treatment, molding, core making, box closing, smelting, pouring, sand dropping, primary cleaning, pre normalizing, flaw detection, welding repair, quenching and tempering, hardness, etc....

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Improvement of sand casting defects of steel castings

Through the production verification of product k141 and the implementation of lack of vision countermeasures, it can be seen that combined with the filling capacity of liquid metal, the solidification mode of steel castings and the shrinkage of steel castings, it is difficult to design a perfect sand casting...

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