Knowledge of machined surfaces and solidification

Release time:

2024-04-30

There will be many gray-black round shallow pits on the surface of meticulous machining. The pits will be filled with slag substances before the equipment is cleaned. The degree of these substances will directly affect the quality of our castings.

There will be many gray-black round shallow pits on the surface of meticulous machining. The pits will be filled with slag substances before the equipment is cleaned. The degree of these substances will directly affect the quality of our castings.

Meticulous machining is convenient, the use of saving its materials, in the process of operation can save its resources, many casting methods can only cast relatively simple castings, and another advantage of meticulous machining is that it can cast complex castings.

There are many problems that need to be paid attention to during the processing of meticulous machining, which is due to the poor activity function of molten steel. In the process of processing, in order to effectively prevent the occurrence of meticulous machining, the lack of pouring is cold insulation, so the wall thickness of meticulous machining cannot be less than 8mm.

The solidification method of detailed machining is as follows:

Intermediate solidification: The solidification of most alloys is between layer-by-layer solidification and paste solidification.

2, paste solidification: alloy crystallization temperature range is very wide, in the solidification of a certain period of time, there is no solid layer on the surface of detailed mechanical processing, solidification zone through the whole section, the first paste, after solidification.

3. Layer-by-layer solidification: There is no solidification zone in the solidification process of metal and eutectic alloy. The cross-sectional liquid and solid phases are clearly separated by a boundary. With the decrease of temperature, the solid phase layer increases continuously, the liquid phase layer decreases continuously, and the middle part.

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With the development of aerospace, industry, microelectronics industry, modern and biological engineering technology, the demand for/detailed mechanical parts (feature size in micron to millimeter level) is increasingly urgent. The specificity of its structure and shape, the diversification of parts and materials, and the accuracy of size and surface quality have become the obvious characteristics of high-precision mechanical parts and their micro-devices and equipment, and the requirements in terms of use function, material characteristics, structure and shape, and sex are also getting higher and higher.

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In the process of meticulous machining, its mechanical properties are better than cast iron, but the cast iron properties of this material are poor, and the melting point is higher than other materials. There are many problems that need to be paid attention to in the process of processing, mainly because the flow performance of molten steel is relatively poor. In the process of processing, in order to prevent insufficient pouring or cold insulation from meticulous machining, the wall thickness of meticulous machining cannot be less than 8mm. The structural force of the gating system is relatively simple, in the process of using the equipment in the cross-sectional size of cast iron is large, so in the process of processing can also be used in the hot casting mold or dry casting mold.
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The company mainly produces railway train brake control series of products, train hutch defends series products, train interior series products and aerospace products, for the Chinese car in each production vehicle company, the railway car depot, the subway and aircraft factory, some products are exported to the United States, France, Britain, India, Russia, Canada and other countries and regions.

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