1. Cause analysis According to the morphological analysis of the casting pore defects after dissection, it is mainly invasive pores, which is caused by the gas produced by the resin sand core after pouring can not be discharged in time, enter and remain in the molten iron, and there...
1.Casting process plan HWS line green sand molding process is adopted, and the size of sand box is 1000 mm × 800 mm × 350/350 mm。 The cylinder body adopts the horizontal pouring process, one box for one, horizontal parting, and the gear chamber is placed in the lower...
With the gradual increase of environmental protection, low energy consumption, low emissions and low pollution have become the goals of innovative design of mechanical products. In order to improve the efficiency of the engine and reduce emissions, the design of the cylinder block tends to be integrated, making its...
The growth mechanism of tin crystal was discussed by means of lower microstructure observation and thermodynamic calculation. The effects of tin grown at different stages (crystallization and crystallization) on the microstructure, mechanical properties and machinability of gray cast iron were studied. The effects of different proportions of scrap +...
Aiming at the process of producing gray cast iron engine block by sand casting, the casting process of gray cast iron is optimized to improve the microstructure and properties. The effect of tin inclusions in gray cast iron on its microstructure and properties was emphatically discussed; The quality of...
The microstructure and properties of high strength gray cast iron produced by sand casting were improved; The effect of hard inclusions in gray cast iron on its structure and properties was studied; The quality of molten iron was controlled by changing the proportion of raw materials, and the mechanical...
In recent years, many studies have been carried out on the evaluation of cutting performance of materials by cutting force combined with other parameters. However, these articles only explain the cutting parameters in the cutting process. There is no mention of whether the engine block is cut with gray...
The mechanical properties and machinability of gray cast iron samples for engine cylinder block were tested, and the microstructure of the matrix was observed. 1. Determination of mechanical properties of gray cast iron for engine cylinder block The tensile strength test of gray cast iron for engine cylinder block...
Chilled iron is the most commonly used chilling material to control the solidification of cylinder block castings. It can be used in combination with the riser. It can be formed as the end, isolate the feeding area of the riser, strengthen the sequential solidification of cylinder block castings, and...
The upper half of the middle cylinder block for a certain type of steam turbine is made of ZG20CrMo, the gross weight of the casting is 6400 kg, and the process yield is 55%. The main structure is composed of cylinder wall with equal wall thickness of 45 mm...