The development status of lost foam casting

lost foam casting,heat and corrosion resistance steel castings

The development status of lost foam casting

National Technical Committee EPC Cast Member's annual statistical results show that, at present China has two annual output of 5,000 tons, while three annual output up to 3000 tons, annual output of up to 2,000 tons 6 , 9 the annual output of up to 1,000 tons. On the one hand because the other cast members are relatively small units of production capacity, annual production is less than 1,000 tons; partly because part of the cast member of the information provided was incomplete, not that its production capacity. Terms of production scale, the National Technical Committee of EPC member companies total annual statistics, the total annual output of 50,000 tons steel, cast iron, total annual production capacity of 86,000 tons. While the above statistics are incomplete, but to a certain extent explains: My LFC steel industry, as opposed to cast iron and aluminum, have larger development space and a strong base for development.

To wear, heat and corrosion resistance steel castings mainly gradually to plain carbon steels, especially low-carbon steel castings exploration. As can be seen from Table 1, the annual output reached 1,000 tons of which 16 member companies, there are seven in the "Three-resistant" steel casting production, accounting for about 50% of the total. In other words, lost foam casting industry, "Three-resistant" steel castings castings relative to other materials easier to get qualified products.

Medium and large parts of the production capacity gradually increased, the maximum weight of a single piece cast steel up to 1.5 tonnes. Relative to sand casting, because the use of dry sand molding, lost foam casting products, the maximum weight may be limited. However, with the lost foam casting technology continues to evolve, such restrictions are constantly being exceeded. According to the author of the information available, Jiangxi Feng Yuan Steel Co., the largest single piece of steel production reached 1.5 tons weight. Jiangxi Feng Yuan Steel Co., Ltd. is a multi-variety, small batch production mode, its products mainly in large steel castings, foam foam sheet by handmade look. Mentioned above, the company 2007 annual output of 5,000 tons, far more than any other cast member companies, this is due to the company's selection as the main products of large pieces; but more importantly, due to the production of large parts of the company's ability to gradually increased. Lost foam castings in addition to previously mentioned by carbon, hydrogen and other defects increasing problems, for certain specific parts concerned, there is also casting crack, slag hole, porosity and mechanical properties of typical defects.