What are the advantages of precision casting processing

What are the advantages of precision casting
Precision casting is the forging method in the contemporary traditional forging process. It can obtain a relatively accurate appearance and a relatively high forging precision. During the period of the overall planning and manufacturing of the product, if you choose more Good casting methods are used to develop wax casting. The metal composite materials obtained after a series of castings are carried out, and relatively high-precision finished products can be obtained in the future after the sand removal. It is cold drawn.
The production and processing of precision casting has become more and more chaotic. Compared with some other traditional sand casting processing techniques, the limits of this kind of processing technique forged are more accurate and the surface is smoother. The period is mainly divided into: metal mold casting, working pressure forging, lost foam casting, investment casting, porcelain type forging, silica sol precision casting. In our country, the foundry industry has stepped into the formality step by step. The products out of precision casting can be produced and processed for small and medium-sized processing parts and large and medium-sized castings. Among the professional skills of investment casting , Commodity castings have become more detailed, and the surface gloss has exceeded the unprecedented 1 aspect ratio outside of the slim size tolerance. In some countries such as Southeast Asia and South America, there is a key market share, and it is still necessary to continue to improve its soundness and quality.
One difficult problem that cannot be ignored in the whole quenching process is: the problem of fire ductility. This problem is common in Hehui Steel. Stainless steel plate precision castings have a quenching ductility in the ultra-low temperature region of 250-400℃; at 450-650℃ The high temperature zone has a quenching ductility. Ultra-low temperature quenching ductility occurs when carbon atoms are separated from austenite and form a tomographic martensite at the austenite grain boundary. This martensite is called e-martensite, and its structure and composition have Different from cementite, it leads to a decrease in impact toughness, which is called ultra-low temperature quenching ductility. When the pit heat is raised again to form a solid quenching distribution, when the quenching is solved again, the quenching ductility will no longer be displayed, so it is also called "irreversible quenching ductility". The high temperature quenching ductility exhibited at 450～650℃ is closely related to the cooling rate. Slow cooling has quenching ductility, while rapid cooling has no quenching ductility. The high-temperature quenching ductility is reversible. If the steel whose quenching ductility has been removed is heated to 600"(: about, and then slowly cooled, the quenching ductility will still be exhibited. Therefore, this type of quenching ductility will be on the grain boundary. It is related to the separation of low melting point ductile chemical substances. The addition of molybdenum to some carbon steels can remove the quenching ductility, which refers to the ultra-low temperature quenching ductility. Many people think that it will be a composite martensite composed of molybdenum and certain aluminum alloy elements. Body, offset by the harmful effects of martensite.
During the period of high precision forging and high surface smoothness, the products produced in this way can reduce the labor of mechanical processing and manufacturing, and can save a lot of CNC lathes during the period of production, processing, and manufacturing. And the production and processing time, and can greatly save the metal material raw materials.