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Industry Forecast


Investment Casting Industry in Chinese Mainland


by Zhigang LU, Tsinghua University, Yun ZHANG, Investment Casting Branch of China Foundry Association


nlike other countries and regions of the world, there are two types of shell making process in Chinese mainland, which are sodium silicate shell process and colloidal silica shell process. Because of


U using chlorine salt hardening


agency during shell building, sodium silicate shell process face more severe environmental pressure. In recent years, some foundries have to abandon their existing process and turn to sand castings or colloidal silica shell process. In 2017, the Chinese government has made higher demands on environmental protection and foundries that cannot meet environmental requirements face suspension. The


stricter policy has


accelerated the replacement of sodium silicate shell process in the industry. Colloidal silica shell process, the


common investment casting technology was introduced to mainland China in the 1950s and 1960s. After more than half a century of development, a perfect industrial system has been formed. In particular, the introduction of technology suitable for general commercial casting in 1990s and then the development for overseas markets made Chinese mainland an important member of the world’s investment casting family. High values-added casting and general commercial casting are two parts of casting market in Chinese mainland.


High Value-Added Casting High value-added castings are represented by aviation castings and China has its own independent military aviation industry. A great deal of experience has been accumulated in the manufacture of military aircraft. With the changing times, the air force has become more and more important in modern defense, and the demand


18 ❘ January 2018 ®


for military aircraft manufacturing and new aircraft development has also continued to increase. The development and manufacture of jet engine is critical to the aviation industry. After years of construction, China has some modern investment casting foundries already and they can produce complex highly technical castings, such as single crystal blades and large structures to serve different military jet engine manufacturing enterprises. In order to integrate China’s


aviation engine manufacturing power, the Aero-Engine Corporation of China (AECC) was founded in 2016 and launched a new round of technological breakthroughs. In


addition to military aviation,


China’s civil aviation market is also very large and continues to develop rapidly. It is predicted that China will need 8,575 aircrafts in the next two decades. At present, China mainly relies on international procurement to meet the needs of civil aircraft market, but keep the ambition to develop the large civil jet aircraft independently. In


2008, Commercial Aircraft Corporation of China (COMAC) was established and after nearly a decade of hard work, on May 5, 2017, the first flight of the large trunk line C919 was successful. Although the current jet engines are still purchased from overseas market, the development of domestic commercial jet engine is also accelerating. In the high value-added sector, the industrial gas turbine is another developing field with huge market in China. In 2014, a new state-owned company was established to focus on the development of domestic heavy gas turbines. In China’s 13th five-year plan, the government has made clear the aviation engine and gas turbine as a priority strategy for manufacturing industry, giving


more policy and


financial support. Attracted by industry development,


more private capital is invested in the production of aviation and industrial gas turbine castings, and some new high level investment casting foundries have emerged in recent years. High value-added casting mention


China


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