由日本专利应用看热喷涂技术在钢铁业中的发展趋势

Trends of Thermal Spray Technology in Steel Industry from the View Point of Patent Applications in Japan

从日本专利局20年(FY1990～FY2009)来申请的专利情况,可以看出日本钢铁领域热喷涂技术的发展趋势。以C23C4/00为分类号进行国际专利检索(IPC检索关键词:喷涂熔融态涂层材料),对8家专利局(日本,美国,欧洲,中国,韩国,俄罗斯,巴西和印度)共15,082篇专利进行检索,各局提交的专利申请比例如下:日本(39%)、美国(22%)、欧洲(17%)、中国(9%)、韩国(6%)、俄罗斯(3%)、巴西(3%)和印度(1%),本文中所引用的数据来自商业数据库。日本关于热喷涂技术申请的专利数量4,369篇(C23C4/00)。根据日本主要钢铁公司提供的数据,钢铁行业的专利比例占所有工业领域的13%。这些专利分为以下几类:(1)涂层在钢铁生产线中的应用;(2)涂层能达到的性能和作用;(3)涂层材料。本文讨论了热喷涂技术在日本钢铁业的现状和未来的发展趋势。

Trends of thermal spraying technology in Japanese steel industry is summarized by investigating the patent applications filed in Japan Patent Office in the past 20 years from FY1990 to FY2009. The total number of patents filed in 8 Patent Offices （Japan, United States, Europe, China, Korea, Russia, Brazil and India）, retrieved by the International Patent Classification symbol C23C4/00 （IPC index key： Coating by spraying the coating material in the molten state）, is 15,082. The ratio of patent applications filed in each Patent Office is as follows： JP （39%）, US （22%）, EP （17%）, CN （9%）, KR （6%）, RU （3%）, BR （3%）and IN （1%）. The database used in this study is from commercially available ＂PatBase＂. Number of patent applications of thermal spray technology （C23C4/00） in Japan is 4,369. Among these patents, the ratio of patents related to steel industry filed by major Japanese steel companies is 13% of total patents of every industrial segment in Japan. These patents are classified according to （1） coating applications in the process of steel production lines, （2） performances and effects obtained by coatings, .and （3） coating materials. In this paper, current status and future trend of thermal spray technology in Japanese steel industry is discussed.