Chinese Investment Casting Strives for Development
Investment casting in China can move forward through restructuring of the industry and environmental protection. JIANG BUJU, LV ZHIGANG, TSINGHUA UNIV.
ZHOU ZEHENG, INVESTMENT CASTING COMMITTEE OF CHINA FOUNDRY ASSOCIATION 调结构 重环保 求发展 中国熔模铸造发展之路
清华大学 姜不居 吕志刚 中国铸造协会精铸分会 周泽衡
A
fter nearly 20 years of rapid development, the value of precision castings produced with the silica sol investment casting process in China accounts for 20% of the world’s total production,
ranking behind only North America and Europe. In addition, a large number of factories produce investment castings with the sodium silicate process. Te status of investment casting companies in 2007 is presented in Table 1. During the recent international economic crisis, changes in the market differed among the various precision casting sectors. Te international market fluctuated greatly, while the domestic market continued to grow.
Precision Casting Companies Continue to Develop China has about 60 high-level precision casting manufac-
turers, including aerospace, military and gas turbine compa- nies, with an output value of about RMB 2.8 billion ($309 million) in 2007. Aerospace companies represent the highest level of investment castings in China. With the development of China’s aircraft manufacturing industry, high-quality cast- ings are made with newer and higher requirements, driving casting technology development. Over the last decade, export-oriented commercial
investment casting companies developed from scratch and grew rapidly. Te facilities’ annual growth rate from 2003 to 2007 was about 30%. Tese companies have become the main force of the Chinese investment casting industry. About 530 manufacturers fall in this category. Te sector had an annual turnover of RMB 14 billion ($2.16 billion) in
Fig. 1. The annual output value of commercial investment cast- ings for export has more than doubled since 2003.
经
过近20年的高速发展，中国大陆采用硅溶 胶工艺生产的精密铸件产值已占全球同类 工艺产值的20%，仅次于北美和欧洲居世 界第三位。另外，还有大量工厂采用水玻璃工艺生产熔 模铸件。表1为2007年熔模铸造企业的情况。 在国际经济危机中，不同精密铸件市场变化有所不 同，国际市场出现大的波动，而国内市场持续增长。
高水平精铸企业仍在继续发展
高水平精铸企业厂家约60家，2007年产值约28亿。 它包括航空航天、军工、燃气轮机等精铸企业。航空航 天精铸企业代表着中国熔模铸造的最高水平。随着中国 飞机制造业的发展，对高质量熔模铸件提出了更新、更 高的要求，也带动了熔模铸造技术的全面进步。
出口商用精铸企业产值波动
近十几年兴起的出口商用精铸企业，从无到有， 发展迅速。2003年至2007年年增长速度约30％，已 成为中国熔模精铸业的主力军。有一定规模的厂家约 530家， 2007年产值达140亿元，占全国熔模铸造总 产值的近50%。
通过发展，有的企业已 规模很大，估计年销售额 过亿或月产量100吨以上 厂家已有40余家，占该类 企业总数5～8％，产量已 占这类企业的三分之一。
图1 出口商用精铸企业年产值 Summer 2011
FOUNDRY-PLANET.COM | MODERN CASTING | CHINA FOUNDRY ASSOCIATION | 37
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