Speaking of wear-resistant casting, it is generally used in mining, metallurgy, building materials, electric power, petrochemical, machinery, transportation and other important industrial fields of consumables, in industrial production has a disadvantage; Importance. According to incomplete statistics, domestic annual consumption is more than 2 million t, at present, there are nearly a thousand wear-resisting casting production enterprises, with an annual production capacity of more than 5 million tons, and a variety of casting processes. Below, V method vacuum molding line small make up for you to introduce the V method casting those things.
1. Current status of wear-resisting casting technology
At present, the abrasion - resistant castings are generally made of sodium silicate sand, alkali phenolic resin sand and some of them are made of epc. These processes are the traditional processes for the production of wear-resistant castings due to their low vitality and stability, relatively high process maturity and the ability to achieve stable mass production. But in particular, the process of sodium silicate sand and resin sand also has the disadvantages of high labor intensity and low production efficiency per capita. Today, with the increasingly severe environmental problems and higher labor costs, the traditional process is facing greater pressure.
Combined with the trend of industrial upgrading, part of domestic enterprises to explore V method casting production wear-resisting castings, the product type to rolling mortar wall, crushing wall tooth plate, hammer head, large casting is given priority to, the production of castings have good surface quality, size of the advantage of high precision, and the working procedure such as modelling shakeout labor intensity is low, have relatively good environmental advantages.
2. Development of V process for production of wear - resistant castings
V-process casting, which originated in Japan in 1973, has been widely concerned since it was introduced into China in the 1980s and gradually applied to the production of many products. At the same time, the technology spread to North America and Europe, has made great progress, the scope of application is expanding, in the forklift counterweight, construction machinery bridge shell, tub and other fields has been very mature application. In the field of wear-resisting castings, V method casting technology has achieved great success in the use of famous wear-resisting castings production enterprises such as Sweden sandvik, America wear-resisting Wolf, America and Iran electric steel, and has gradually become the mainstream technology of these enterprises. In China, since the 1980s, there have been preliminary experiments to explore the production of wear-resistant castings by this process, but there is no mature application (except railway turnout). In recent years, in the field of wear-resisting casting production, v method casting is mainly used in the production and application of wear-resisting casting in traditional mines, including high manganese steel conical, tooth plate, hammer head, plate hammer, large liner plate and so on. Some enterprises even successfully adopt V process to produce high chromium roller sleeve castings for vertical mill, and good results have been obtained.
Reasons for the V process
According to the experience at home and abroad, V process has the advantages of high quality and environmental friendliness, which is one of the important reasons why people choose this process. The advantages of cost and environmental protection are well known. In addition to the high surface quality and high dimensional accuracy of v-process, the improvement of fluidity makes low-temperature casting possible, which may have certain exploration value in refining grain and improving wear resistance. The number of casting enterprises in China is large, and the overall casting quality is low. Casting enterprises are facing more and more pressure from environmental protection and human cost. From the perspective of improving product quality and controlling environmental pollution, V method casting technology is expected to attract better attention and wider application in the future.